1928 lines
49 KiB
C
1928 lines
49 KiB
C
/*
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* main.c -- Code generator and main program for gawk.
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*/
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/*
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* Copyright (C) 1986, 1988, 1989, 1991-2022,
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* the Free Software Foundation, Inc.
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*
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* This file is part of GAWK, the GNU implementation of the
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* AWK Programming Language.
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*
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* GAWK is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* GAWK is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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/* FIX THIS BEFORE EVERY RELEASE: */
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#define UPDATE_YEAR 2022
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#include "awk.h"
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#include "getopt.h"
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#ifdef HAVE_MCHECK_H
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#include <mcheck.h>
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#endif
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#ifdef HAVE_LIBSIGSEGV
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#include <sigsegv.h>
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#else
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typedef void *stackoverflow_context_t;
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/* the argument to this macro is purposely not used */
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#define sigsegv_install_handler(catchsegv) signal(SIGSEGV, catchsig)
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/* define as 0 rather than empty so that (void) cast on it works */
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#define stackoverflow_install_handler(catchstackoverflow, extra_stack, STACK_SIZE) 0
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#endif
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#define DEFAULT_PROFILE "awkprof.out" /* where to put profile */
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#define DEFAULT_VARFILE "awkvars.out" /* where to put vars */
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#define DEFAULT_PREC 53
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#define DEFAULT_ROUNDMODE "N" /* round to nearest */
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static const char *varfile = DEFAULT_VARFILE;
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const char *command_file = NULL; /* debugger commands */
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static void usage(int exitval, FILE *fp) ATTRIBUTE_NORETURN;
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static void copyleft(void) ATTRIBUTE_NORETURN;
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static void cmdline_fs(char *str);
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static void init_args(int argc0, int argc, const char *argv0, char **argv);
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static void init_vars(void);
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static NODE *load_environ(void);
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static NODE *load_procinfo(void);
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static void catchsig(int sig);
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#ifdef HAVE_LIBSIGSEGV
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static int catchsegv(void *fault_address, int serious);
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static void catchstackoverflow(int emergency, stackoverflow_context_t scp);
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#endif
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static void nostalgia(void) ATTRIBUTE_NORETURN;
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static void version(void) ATTRIBUTE_NORETURN;
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static void init_fds(void);
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static void init_groupset(void);
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static void save_argv(int, char **);
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static const char *platform_name();
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/* These nodes store all the special variables AWK uses */
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NODE *ARGC_node, *ARGIND_node, *ARGV_node, *BINMODE_node, *CONVFMT_node;
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static NODE *ENVIRON_node;
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NODE *ERRNO_node, *FIELDWIDTHS_node, *FILENAME_node;
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NODE *FNR_node, *FPAT_node, *FS_node, *IGNORECASE_node, *LINT_node;
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NODE *NF_node, *NR_node, *OFMT_node, *OFS_node, *ORS_node, *PROCINFO_node;
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NODE *RLENGTH_node, *RSTART_node, *RS_node, *RT_node, *SUBSEP_node;
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NODE *PREC_node, *ROUNDMODE_node;
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NODE *TEXTDOMAIN_node;
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long NF;
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long NR;
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long FNR;
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int BINMODE;
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bool IGNORECASE;
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char *OFS;
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char *ORS;
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char *OFMT;
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char *TEXTDOMAIN;
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/*
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* CONVFMT is a convenience pointer for the current number to string format.
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* We must supply an initial value to avoid recursion problems of
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* set_CONVFMT -> fmt_index -> force_string: gets NULL CONVFMT
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* Fun, fun, fun, fun.
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*/
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const char *CONVFMT = "%.6g";
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NODE *Nnull_string; /* The global null string */
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#if defined(HAVE_LOCALE_H)
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struct lconv loc; /* current locale */
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static void init_locale(struct lconv *l);
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#endif /* defined(HAVE_LOCALE_H) */
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/* The name the program was invoked under, for error messages */
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const char *myname;
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/* A block of AWK code to be run */
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INSTRUCTION *code_block = NULL;
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char **d_argv; /* saved argv for debugger restarting */
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/*
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* List of rules and functions with first and last instruction (source_line)
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* information; used for profiling and debugging.
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*/
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INSTRUCTION *rule_list;
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int exit_val = EXIT_SUCCESS; /* exit value */
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#if defined(YYDEBUG) || defined(GAWKDEBUG)
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extern int yydebug;
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#endif
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SRCFILE *srcfiles; /* source files */
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/*
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* structure to remember variable pre-assignments
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*/
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struct pre_assign {
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enum assign_type { PRE_ASSIGN = 1, PRE_ASSIGN_FS } type;
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char *val;
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};
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static struct pre_assign *preassigns = NULL; /* requested via -v or -F */
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static long numassigns = -1; /* how many of them */
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static bool disallow_var_assigns = false; /* true for --exec */
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static void add_preassign(enum assign_type type, char *val);
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static void parse_args(int argc, char **argv);
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static void set_locale_stuff(void);
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static bool stopped_early = false;
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bool using_persistent_malloc = false;
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enum do_flag_values do_flags = DO_FLAG_NONE;
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bool do_itrace = false; /* provide simple instruction trace */
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bool do_optimize = true; /* apply default optimizations */
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static int do_nostalgia = false; /* provide a blast from the past */
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static int do_binary = false; /* hands off my data! */
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static int do_version = false; /* print version info */
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static const char *locale = ""; /* default value to setlocale */
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static const char *locale_dir = LOCALEDIR; /* default locale dir */
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int use_lc_numeric = false; /* obey locale for decimal point */
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int gawk_mb_cur_max; /* MB_CUR_MAX value, see comment in main() */
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FILE *output_fp; /* default gawk output, can be redirected in the debugger */
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bool output_is_tty = false; /* control flushing of output */
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/* default format for strftime(), available via PROCINFO */
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const char def_strftime_format[] = "%a %b %e %H:%M:%S %Z %Y";
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extern const char *version_string;
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#if defined (HAVE_GETGROUPS) && defined(NGROUPS_MAX) && NGROUPS_MAX > 0
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GETGROUPS_T *groupset; /* current group set */
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int ngroups; /* size of said set */
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#endif
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void (*lintfunc)(const char *mesg, ...) = r_warning;
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/* Sorted by long option name! */
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static const struct option optab[] = {
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{ "assign", required_argument, NULL, 'v' },
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{ "bignum", no_argument, NULL, 'M' },
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{ "characters-as-bytes", no_argument, & do_binary, 'b' },
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{ "copyright", no_argument, NULL, 'C' },
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{ "debug", optional_argument, NULL, 'D' },
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{ "dump-variables", optional_argument, NULL, 'd' },
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{ "exec", required_argument, NULL, 'E' },
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{ "field-separator", required_argument, NULL, 'F' },
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{ "file", required_argument, NULL, 'f' },
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{ "gen-pot", no_argument, NULL, 'g' },
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{ "help", no_argument, NULL, 'h' },
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{ "include", required_argument, NULL, 'i' },
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{ "lint", optional_argument, NULL, 'L' },
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{ "lint-old", no_argument, NULL, 't' },
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{ "load", required_argument, NULL, 'l' },
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#if defined(LOCALEDEBUG)
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{ "locale", required_argument, NULL, 'Z' },
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#endif
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{ "non-decimal-data", no_argument, NULL, 'n' },
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{ "no-optimize", no_argument, NULL, 's' },
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{ "nostalgia", no_argument, & do_nostalgia, 1 },
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{ "optimize", no_argument, NULL, 'O' },
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#if defined(YYDEBUG) || defined(GAWKDEBUG)
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{ "parsedebug", no_argument, NULL, 'Y' },
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#endif
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{ "persist", optional_argument, NULL, 'T' },
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{ "posix", no_argument, NULL, 'P' },
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{ "pretty-print", optional_argument, NULL, 'o' },
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{ "profile", optional_argument, NULL, 'p' },
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{ "re-interval", no_argument, NULL, 'r' },
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{ "sandbox", no_argument, NULL, 'S' },
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{ "source", required_argument, NULL, 'e' },
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{ "trace", no_argument, NULL, 'I' },
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{ "traditional", no_argument, NULL, 'c' },
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{ "use-lc-numeric", no_argument, & use_lc_numeric, 1 },
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{ "version", no_argument, & do_version, 'V' },
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{ NULL, 0, NULL, '\0' }
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};
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/* main --- process args, parse program, run it, clean up */
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int
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main(int argc, char **argv)
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{
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int i;
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char *extra_stack;
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bool have_srcfile = false;
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SRCFILE *s;
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char *cp;
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const char *persist_file = getenv("GAWK_PERSIST_FILE"); /* backing file for PMA */
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#if defined(LOCALEDEBUG)
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const char *initial_locale;
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#endif
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myname = gawk_name(argv[0]);
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int pma_result = pma_init(1, persist_file);
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if (pma_result != 0) {
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// don't use 'fatal' routine, it seems to need to
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// allocate memory
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fprintf(stderr, _("%s: fatal: persistent memory allocator failed to initialize: return value %d, pma.c line: %d.\n"),
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myname, pma_result, pma_errno);
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exit(EXIT_FATAL);
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}
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using_persistent_malloc = (persist_file != NULL);
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#ifndef USE_PERSISTENT_MALLOC
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if (using_persistent_malloc)
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warning(_("persistent memory is not supported"));
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#endif
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#ifdef HAVE_MPFR
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mp_set_memory_functions(mpfr_mem_alloc, mpfr_mem_realloc, mpfr_mem_free);
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#endif
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/* do these checks early */
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if (getenv("TIDYMEM") != NULL)
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do_flags |= DO_TIDY_MEM;
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#ifdef HAVE_MCHECK_H
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#ifdef HAVE_MTRACE
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if (! using_persistent_malloc && do_tidy_mem)
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mtrace();
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#endif /* HAVE_MTRACE */
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#endif /* HAVE_MCHECK_H */
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os_arg_fixup(&argc, &argv); /* emulate redirection, expand wildcards */
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if (argc < 2)
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usage(EXIT_FAILURE, stderr);
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if ((cp = getenv("GAWK_LOCALE_DIR")) != NULL)
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locale_dir = cp;
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#if defined(F_GETFL) && defined(O_APPEND)
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// 1/2018: This is needed on modern BSD systems so that the
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// inplace tests pass. I think it's a bug in those kernels
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// but let's just work around it anyway.
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int flags = fcntl(fileno(stderr), F_GETFL, NULL);
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if (flags >= 0 && (flags & O_APPEND) == 0) {
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flags |= O_APPEND;
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(void) fcntl(fileno(stderr), F_SETFL, flags);
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}
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#endif
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#if defined(LOCALEDEBUG)
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initial_locale = locale;
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#endif
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set_locale_stuff();
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(void) signal(SIGFPE, catchsig);
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#ifdef SIGBUS
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(void) signal(SIGBUS, catchsig);
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#endif
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/*
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* Ignore SIGPIPE so that writes to pipes that fail don't
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* kill the process but instead return -1 and set errno.
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* That lets us print a fatal message instead of dieing suddenly.
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*
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* Note that this requires ignoring EPIPE when writing and
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* flushing stdout/stderr in other parts of the program. E.g.,
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*
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* gawk 'BEGIN { print "hi" }' | exit
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*
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* should not give us "broken pipe" messages --- mainly because
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* it did not do so in the past and people would complain.
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*/
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ignore_sigpipe();
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(void) sigsegv_install_handler(catchsegv);
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#define STACK_SIZE (16*1024)
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emalloc(extra_stack, char *, STACK_SIZE, "main");
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(void) stackoverflow_install_handler(catchstackoverflow, extra_stack, STACK_SIZE);
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#undef STACK_SIZE
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/* initialize the null string */
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Nnull_string = make_string("", 0);
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/* Robustness: check that file descriptors 0, 1, 2 are open */
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init_fds();
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/* init array handling. */
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array_init();
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/* init the symbol tables */
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init_symbol_table();
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output_fp = stdout;
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/* initialize global (main) execution context */
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push_context(new_context());
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parse_args(argc, argv);
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#if defined(LOCALEDEBUG)
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if (locale != initial_locale)
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set_locale_stuff();
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#endif
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/*
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* In glibc, MB_CUR_MAX is actually a function. This value is
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* tested *a lot* in many speed-critical places in gawk. Caching
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* this value once makes a speed difference.
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*/
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gawk_mb_cur_max = MB_CUR_MAX;
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/* init the cache for checking bytes if they're characters */
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init_btowc_cache();
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/* set up the single byte case table */
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if (gawk_mb_cur_max == 1)
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load_casetable();
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if (do_nostalgia)
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nostalgia();
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/* check for POSIXLY_CORRECT environment variable */
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if (! do_posix && getenv("POSIXLY_CORRECT") != NULL) {
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do_flags |= DO_POSIX;
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if (do_lint)
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lintwarn(
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_("environment variable `POSIXLY_CORRECT' set: turning on `--posix'"));
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}
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// Checks for conflicting command-line arguments.
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if (do_posix) {
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use_lc_numeric = true;
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if (do_traditional) /* both on command line */
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warning(_("`--posix' overrides `--traditional'"));
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else
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do_flags |= DO_TRADITIONAL;
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/*
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* POSIX compliance also implies
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* no GNU extensions either.
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*/
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}
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if (do_traditional && do_non_decimal_data) {
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do_flags &= ~DO_NON_DEC_DATA;
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warning(_("`--posix'/`--traditional' overrides `--non-decimal-data'"));
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}
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if (do_binary) {
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if (do_posix)
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warning(_("`--posix' overrides `--characters-as-bytes'"));
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else {
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gawk_mb_cur_max = 1; /* hands off my data! */
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#if defined(LC_ALL)
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setlocale(LC_ALL, "C");
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#endif
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}
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}
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if (do_lint) {
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if (os_is_setuid())
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lintwarn(_("running %s setuid root may be a security problem"), myname);
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if (do_intervals)
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lintwarn(_("The -r/--re-interval options no longer have any effect"));
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}
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if (do_debug) /* Need to register the debugger pre-exec hook before any other */
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init_debug();
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#ifdef HAVE_MPFR
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/* Set up MPFR defaults, and register pre-exec hook to process arithmetic opcodes */
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if (do_mpfr)
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init_mpfr(DEFAULT_PREC, DEFAULT_ROUNDMODE);
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#endif
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/* load group set */
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init_groupset();
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#ifdef HAVE_MPFR
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if (do_mpfr) {
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mpz_init(Nnull_string->mpg_i);
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Nnull_string->flags = (MALLOC|STRCUR|STRING|MPZN|NUMCUR|NUMBER);
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} else
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#endif
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{
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Nnull_string->numbr = 0.0;
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Nnull_string->flags = (MALLOC|STRCUR|STRING|NUMCUR|NUMBER);
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}
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/*
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* Tell the regex routines how they should work.
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* Do this before initializing variables, since
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* they could want to do a regexp compile.
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*/
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resetup();
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/* Set up the special variables */
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init_vars();
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/* Set up the field variables */
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init_fields();
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/* Now process the pre-assignments */
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int dash_v_errs = 0; // bad stuff for -v
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for (i = 0; i <= numassigns; i++) {
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if (preassigns[i].type == PRE_ASSIGN)
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dash_v_errs += (arg_assign(preassigns[i].val, true) == false);
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else /* PRE_ASSIGN_FS */
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cmdline_fs(preassigns[i].val);
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efree(preassigns[i].val);
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}
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if (preassigns != NULL)
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efree(preassigns);
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if ((BINMODE & BINMODE_INPUT) != 0)
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if (os_setbinmode(fileno(stdin), O_BINARY) == -1)
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fatal(_("cannot set binary mode on stdin: %s"), strerror(errno));
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if ((BINMODE & BINMODE_OUTPUT) != 0) {
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if (os_setbinmode(fileno(stdout), O_BINARY) == -1)
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fatal(_("cannot set binary mode on stdout: %s"), strerror(errno));
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if (os_setbinmode(fileno(stderr), O_BINARY) == -1)
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fatal(_("cannot set binary mode on stderr: %s"), strerror(errno));
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}
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#ifdef GAWKDEBUG
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setbuf(stdout, (char *) NULL); /* make debugging easier */
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#endif
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if (os_isatty(fileno(stdout)))
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output_is_tty = true;
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/* initialize API before loading extension libraries */
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init_ext_api();
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/* load extension libs */
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for (s = srcfiles->next; s != srcfiles; s = s->next) {
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if (s->stype == SRC_EXTLIB)
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load_ext(s->fullpath);
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else if (s->stype != SRC_INC)
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have_srcfile = true;
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}
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/* do version check after extensions are loaded to get extension info */
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if (do_version)
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version();
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/* No -f or --source options, use next arg */
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if (! have_srcfile) {
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if (optind > argc - 1 || stopped_early) /* no args left or no program */
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usage(EXIT_FAILURE, stderr);
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(void) add_srcfile(SRC_CMDLINE, argv[optind], srcfiles, NULL, NULL);
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optind++;
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}
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/* Select the interpreter routine */
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init_interpret();
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init_args(optind, argc,
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do_posix ? argv[0] : myname,
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argv);
|
|
|
|
#if defined(LC_NUMERIC)
|
|
/*
|
|
* FRAGILE! CAREFUL!
|
|
* Pre-initing the variables with arg_assign() can change the
|
|
* locale. Force it to C before parsing the program.
|
|
*/
|
|
setlocale(LC_NUMERIC, "C");
|
|
#endif
|
|
/* Read in the program */
|
|
if (parse_program(& code_block, false) != 0 || dash_v_errs > 0)
|
|
exit(EXIT_FAILURE);
|
|
|
|
if (do_intl)
|
|
exit(EXIT_SUCCESS);
|
|
|
|
set_current_namespace(awk_namespace);
|
|
|
|
install_builtins();
|
|
|
|
if (do_lint)
|
|
shadow_funcs();
|
|
|
|
if (do_lint && code_block->nexti->opcode == Op_atexit)
|
|
lintwarn(_("no program text at all!"));
|
|
|
|
load_symbols();
|
|
|
|
if (do_profile)
|
|
init_profiling_signals();
|
|
|
|
#if defined(LC_NUMERIC)
|
|
/*
|
|
* See comment above about using locale's decimal point.
|
|
*
|
|
* 10/2005:
|
|
* Bitter experience teaches us that most people the world over
|
|
* use period as the decimal point, not whatever their locale
|
|
* uses. Thus, only use the locale's decimal point if being
|
|
* posixly anal-retentive.
|
|
*
|
|
* 7/2007:
|
|
* Be a little bit kinder. Allow the --use-lc-numeric option
|
|
* to also use the local decimal point. This avoids the draconian
|
|
* strictness of POSIX mode if someone just wants to parse their
|
|
* data using the local decimal point.
|
|
*/
|
|
if (use_lc_numeric)
|
|
setlocale(LC_NUMERIC, locale);
|
|
#endif
|
|
|
|
init_io();
|
|
output_fp = stdout;
|
|
|
|
if (do_debug)
|
|
debug_prog(code_block);
|
|
else if (do_pretty_print && ! do_profile)
|
|
; /* run pretty printer only. */
|
|
else
|
|
interpret(code_block);
|
|
|
|
if (do_pretty_print) {
|
|
set_current_namespace(awk_namespace);
|
|
dump_prog(code_block);
|
|
dump_funcs();
|
|
}
|
|
|
|
if (do_dump_vars)
|
|
dump_vars(varfile);
|
|
|
|
#ifdef HAVE_MPFR
|
|
if (do_mpfr)
|
|
cleanup_mpfr();
|
|
#endif
|
|
|
|
if (do_tidy_mem)
|
|
release_all_vars();
|
|
|
|
/* keep valgrind happier */
|
|
if (extra_stack)
|
|
efree(extra_stack);
|
|
|
|
final_exit(exit_val);
|
|
return exit_val; /* to suppress warnings */
|
|
}
|
|
|
|
/* add_preassign --- add one element to preassigns */
|
|
|
|
static void
|
|
add_preassign(enum assign_type type, char *val)
|
|
{
|
|
static long alloc_assigns; /* for how many are allocated */
|
|
|
|
#define INIT_SRC 4
|
|
|
|
++numassigns;
|
|
|
|
if (preassigns == NULL) {
|
|
emalloc(preassigns, struct pre_assign *,
|
|
INIT_SRC * sizeof(struct pre_assign), "add_preassign");
|
|
alloc_assigns = INIT_SRC;
|
|
} else if (numassigns >= alloc_assigns) {
|
|
alloc_assigns *= 2;
|
|
erealloc(preassigns, struct pre_assign *,
|
|
alloc_assigns * sizeof(struct pre_assign), "add_preassigns");
|
|
}
|
|
preassigns[numassigns].type = type;
|
|
preassigns[numassigns].val = estrdup(val, strlen(val));
|
|
|
|
#undef INIT_SRC
|
|
}
|
|
|
|
/* usage --- print usage information and exit */
|
|
|
|
static void
|
|
usage(int exitval, FILE *fp)
|
|
{
|
|
/* Not factoring out common stuff makes it easier to translate. */
|
|
fprintf(fp, _("Usage: %s [POSIX or GNU style options] -f progfile [--] file ...\n"),
|
|
myname);
|
|
fprintf(fp, _("Usage: %s [POSIX or GNU style options] [--] %cprogram%c file ...\n"),
|
|
myname, quote, quote);
|
|
|
|
/* GNU long options info. This is too many options. */
|
|
|
|
fputs(_("POSIX options:\t\tGNU long options: (standard)\n"), fp);
|
|
fputs(_("\t-f progfile\t\t--file=progfile\n"), fp);
|
|
fputs(_("\t-F fs\t\t\t--field-separator=fs\n"), fp);
|
|
fputs(_("\t-v var=val\t\t--assign=var=val\n"), fp);
|
|
fputs(_("Short options:\t\tGNU long options: (extensions)\n"), fp);
|
|
fputs(_("\t-b\t\t\t--characters-as-bytes\n"), fp);
|
|
fputs(_("\t-c\t\t\t--traditional\n"), fp);
|
|
fputs(_("\t-C\t\t\t--copyright\n"), fp);
|
|
fputs(_("\t-d[file]\t\t--dump-variables[=file]\n"), fp);
|
|
fputs(_("\t-D[file]\t\t--debug[=file]\n"), fp);
|
|
fputs(_("\t-e 'program-text'\t--source='program-text'\n"), fp);
|
|
fputs(_("\t-E file\t\t\t--exec=file\n"), fp);
|
|
fputs(_("\t-g\t\t\t--gen-pot\n"), fp);
|
|
fputs(_("\t-h\t\t\t--help\n"), fp);
|
|
fputs(_("\t-i includefile\t\t--include=includefile\n"), fp);
|
|
fputs(_("\t-I\t\t\t--trace\n"), fp);
|
|
fputs(_("\t-l library\t\t--load=library\n"), fp);
|
|
/*
|
|
* TRANSLATORS: the "fatal", "invalid" and "no-ext" here are literal
|
|
* values, they should not be translated. Thanks.
|
|
*/
|
|
fputs(_("\t-L[fatal|invalid|no-ext]\t--lint[=fatal|invalid|no-ext]\n"), fp);
|
|
fputs(_("\t-M\t\t\t--bignum\n"), fp);
|
|
fputs(_("\t-N\t\t\t--use-lc-numeric\n"), fp);
|
|
fputs(_("\t-n\t\t\t--non-decimal-data\n"), fp);
|
|
fputs(_("\t-o[file]\t\t--pretty-print[=file]\n"), fp);
|
|
fputs(_("\t-O\t\t\t--optimize\n"), fp);
|
|
fputs(_("\t-p[file]\t\t--profile[=file]\n"), fp);
|
|
fputs(_("\t-P\t\t\t--posix\n"), fp);
|
|
fputs(_("\t-r\t\t\t--re-interval\n"), fp);
|
|
fputs(_("\t-s\t\t\t--no-optimize\n"), fp);
|
|
fputs(_("\t-S\t\t\t--sandbox\n"), fp);
|
|
fputs(_("\t-t\t\t\t--lint-old\n"), fp);
|
|
fputs(_("\t-V\t\t\t--version\n"), fp);
|
|
#ifdef NOSTALGIA
|
|
fputs(_("\t-W nostalgia\t\t--nostalgia\n"), fp);
|
|
#endif
|
|
#ifdef GAWKDEBUG
|
|
fputs(_("\t-Y\t\t\t--parsedebug\n"), fp);
|
|
#endif
|
|
#ifdef GAWKDEBUG
|
|
fputs(_("\t-Z locale-name\t\t--locale=locale-name\n"), fp);
|
|
#endif
|
|
|
|
/* This is one string to make things easier on translators. */
|
|
/* TRANSLATORS: --help output (end)
|
|
no-wrap */
|
|
fputs(_("\nTo report bugs, use the `gawkbug' program.\n\
|
|
For full instructions, see the node `Bugs' in `gawk.info'\n\
|
|
which is section `Reporting Problems and Bugs' in the\n\
|
|
printed version. This same information may be found at\n\
|
|
https://www.gnu.org/software/gawk/manual/html_node/Bugs.html.\n\
|
|
PLEASE do NOT try to report bugs by posting in comp.lang.awk,\n\
|
|
or by using a web forum such as Stack Overflow.\n\n"), fp);
|
|
|
|
/* ditto */
|
|
fputs(_("gawk is a pattern scanning and processing language.\n\
|
|
By default it reads standard input and writes standard output.\n\n"), fp);
|
|
|
|
/* ditto */
|
|
fprintf(fp, _("Examples:\n\t%s '{ sum += $1 }; END { print sum }' file\n\
|
|
\t%s -F: '{ print $1 }' /etc/passwd\n"), myname, myname);
|
|
|
|
fflush(fp);
|
|
|
|
if (ferror(fp)) {
|
|
os_maybe_set_errno();
|
|
|
|
/* don't warn about stdout/stderr if EPIPE, but do error exit */
|
|
if (errno == EPIPE)
|
|
die_via_sigpipe();
|
|
|
|
if (fp == stdout)
|
|
warning(_("error writing standard output: %s"), strerror(errno));
|
|
else if (fp == stderr)
|
|
warning(_("error writing standard error: %s"), strerror(errno));
|
|
|
|
// some other problem than SIGPIPE
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
|
|
exit(exitval);
|
|
}
|
|
|
|
/* copyleft --- print out the short GNU copyright information */
|
|
|
|
static void
|
|
copyleft()
|
|
{
|
|
static const char blurb_part1[] =
|
|
N_("Copyright (C) 1989, 1991-%d Free Software Foundation.\n\
|
|
\n\
|
|
This program is free software; you can redistribute it and/or modify\n\
|
|
it under the terms of the GNU General Public License as published by\n\
|
|
the Free Software Foundation; either version 3 of the License, or\n\
|
|
(at your option) any later version.\n\
|
|
\n");
|
|
static const char blurb_part2[] =
|
|
N_("This program is distributed in the hope that it will be useful,\n\
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of\n\
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n\
|
|
GNU General Public License for more details.\n\
|
|
\n");
|
|
static const char blurb_part3[] =
|
|
N_("You should have received a copy of the GNU General Public License\n\
|
|
along with this program. If not, see http://www.gnu.org/licenses/.\n");
|
|
|
|
/* multiple blurbs are needed for some brain dead compilers. */
|
|
printf(_(blurb_part1), UPDATE_YEAR); /* Last update year */
|
|
fputs(_(blurb_part2), stdout);
|
|
fputs(_(blurb_part3), stdout);
|
|
fflush(stdout);
|
|
|
|
if (ferror(stdout)) {
|
|
os_maybe_set_errno();
|
|
|
|
/* don't warn about stdout if EPIPE, but do error exit */
|
|
if (errno != EPIPE)
|
|
warning(_("error writing standard output: %s"), strerror(errno));
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
|
|
exit(EXIT_SUCCESS);
|
|
}
|
|
|
|
/* cmdline_fs --- set FS from the command line */
|
|
|
|
static void
|
|
cmdline_fs(char *str)
|
|
{
|
|
NODE **tmp;
|
|
|
|
tmp = &FS_node->var_value;
|
|
unref(*tmp);
|
|
/*
|
|
* Only if in full compatibility mode check for the stupid special
|
|
* case so -F\t works as documented in awk book even though the shell
|
|
* hands us -Ft. Bleah!
|
|
*
|
|
* Thankfully, POSIX didn't propagate this "feature".
|
|
*/
|
|
if (str[0] == 't' && str[1] == '\0') {
|
|
if (do_lint)
|
|
lintwarn(_("-Ft does not set FS to tab in POSIX awk"));
|
|
if (do_traditional && ! do_posix)
|
|
str[0] = '\t';
|
|
}
|
|
|
|
*tmp = make_str_node(str, strlen(str), SCAN); /* do process escapes */
|
|
set_FS();
|
|
}
|
|
|
|
/* init_args --- set up ARGV from stuff on the command line */
|
|
|
|
static void
|
|
init_args(int argc0, int argc, const char *argv0, char **argv)
|
|
{
|
|
int i, j;
|
|
NODE *sub, *val;
|
|
NODE *shadow_node = NULL;
|
|
|
|
ARGV_node = install_symbol(estrdup("ARGV", 4), Node_var_array);
|
|
sub = make_number(0.0);
|
|
val = make_string(argv0, strlen(argv0));
|
|
val->flags |= USER_INPUT;
|
|
assoc_set(ARGV_node, sub, val);
|
|
|
|
if (do_sandbox) {
|
|
shadow_node = make_array();
|
|
sub = make_string(argv0, strlen(argv0));
|
|
val = make_number(0.0);
|
|
assoc_set(shadow_node, sub, val);
|
|
}
|
|
|
|
|
|
for (i = argc0, j = 1; i < argc; i++, j++) {
|
|
sub = make_number((AWKNUM) j);
|
|
val = make_string(argv[i], strlen(argv[i]));
|
|
val->flags |= USER_INPUT;
|
|
assoc_set(ARGV_node, sub, val);
|
|
|
|
if (do_sandbox) {
|
|
sub = make_string(argv[i], strlen(argv[i]));
|
|
val = make_number(0.0);
|
|
assoc_set(shadow_node, sub, val);
|
|
}
|
|
}
|
|
|
|
ARGC_node = install_symbol(estrdup("ARGC", 4), Node_var);
|
|
ARGC_node->var_value = make_number((AWKNUM) j);
|
|
|
|
if (do_sandbox)
|
|
init_argv_array(ARGV_node, shadow_node);
|
|
}
|
|
|
|
|
|
/*
|
|
* Set all the special variables to their initial values.
|
|
* Note that some of the variables that have set_FOO routines should
|
|
* *N*O*T* have those routines called upon initialization, and thus
|
|
* they have NULL entries in that field. This is notably true of FS
|
|
* and IGNORECASE.
|
|
*/
|
|
|
|
struct varinit {
|
|
NODE **spec;
|
|
const char *name;
|
|
const char *strval;
|
|
AWKNUM numval;
|
|
Func_ptr update;
|
|
Func_ptr assign;
|
|
bool do_assign;
|
|
int flags;
|
|
#define NO_INSTALL 0x01
|
|
#define NON_STANDARD 0x02
|
|
#define NOT_OFF_LIMITS 0x04 /* may be accessed by extension function */
|
|
};
|
|
|
|
static const struct varinit varinit[] = {
|
|
{NULL, "ARGC", NULL, 0, NULL, NULL, false, NO_INSTALL },
|
|
{&ARGIND_node, "ARGIND", NULL, 0, NULL, NULL, false, NON_STANDARD },
|
|
{NULL, "ARGV", NULL, 0, NULL, NULL, false, NO_INSTALL },
|
|
{&BINMODE_node, "BINMODE", NULL, 0, NULL, set_BINMODE, false, NON_STANDARD },
|
|
{&CONVFMT_node, "CONVFMT", "%.6g", 0, NULL, set_CONVFMT,true, 0 },
|
|
{NULL, "ENVIRON", NULL, 0, NULL, NULL, false, NO_INSTALL },
|
|
{&ERRNO_node, "ERRNO", "", 0, NULL, NULL, false, NON_STANDARD },
|
|
{&FIELDWIDTHS_node, "FIELDWIDTHS", "", 0, NULL, set_FIELDWIDTHS, false, NON_STANDARD },
|
|
{&FILENAME_node, "FILENAME", "", 0, NULL, NULL, false, 0 },
|
|
{&FNR_node, "FNR", NULL, 0, update_FNR, set_FNR, true, 0 },
|
|
{&FS_node, "FS", " ", 0, NULL, set_FS, false, 0 },
|
|
{&FPAT_node, "FPAT", "[^[:space:]]+", 0, NULL, set_FPAT, false, NON_STANDARD },
|
|
{&IGNORECASE_node, "IGNORECASE", NULL, 0, NULL, set_IGNORECASE, false, NON_STANDARD },
|
|
{&LINT_node, "LINT", NULL, 0, NULL, set_LINT, false, NON_STANDARD },
|
|
{&PREC_node, "PREC", NULL, DEFAULT_PREC, NULL, set_PREC, false, NON_STANDARD},
|
|
{&NF_node, "NF", NULL, -1, update_NF, set_NF, false, 0 },
|
|
{&NR_node, "NR", NULL, 0, update_NR, set_NR, true, 0 },
|
|
{&OFMT_node, "OFMT", "%.6g", 0, NULL, set_OFMT, true, 0 },
|
|
{&OFS_node, "OFS", " ", 0, NULL, set_OFS, true, 0 },
|
|
{&ORS_node, "ORS", "\n", 0, NULL, set_ORS, true, 0 },
|
|
{NULL, "PROCINFO", NULL, 0, NULL, NULL, false, NO_INSTALL | NON_STANDARD | NOT_OFF_LIMITS },
|
|
{&RLENGTH_node, "RLENGTH", NULL, 0, NULL, NULL, false, 0 },
|
|
{&ROUNDMODE_node, "ROUNDMODE", DEFAULT_ROUNDMODE, 0, NULL, set_ROUNDMODE, false, NON_STANDARD },
|
|
{&RS_node, "RS", "\n", 0, NULL, set_RS, true, 0 },
|
|
{&RSTART_node, "RSTART", NULL, 0, NULL, NULL, false, 0 },
|
|
{&RT_node, "RT", "", 0, NULL, NULL, false, NON_STANDARD },
|
|
{&SUBSEP_node, "SUBSEP", "\034", 0, NULL, set_SUBSEP, true, 0 },
|
|
{&TEXTDOMAIN_node, "TEXTDOMAIN", "messages", 0, NULL, set_TEXTDOMAIN, true, NON_STANDARD },
|
|
{0, NULL, NULL, 0, NULL, NULL, false, 0 },
|
|
};
|
|
|
|
/* init_vars --- actually initialize everything in the symbol table */
|
|
|
|
static void
|
|
init_vars()
|
|
{
|
|
const struct varinit *vp;
|
|
NODE *n;
|
|
|
|
for (vp = varinit; vp->name != NULL; vp++) {
|
|
if ((vp->flags & NO_INSTALL) != 0)
|
|
continue;
|
|
n = *(vp->spec) = install_symbol(estrdup(vp->name, strlen(vp->name)), Node_var);
|
|
if (vp->strval != NULL)
|
|
n->var_value = make_string(vp->strval, strlen(vp->strval));
|
|
else
|
|
n->var_value = make_number(vp->numval);
|
|
n->var_assign = (Func_ptr) vp->assign;
|
|
n->var_update = (Func_ptr) vp->update;
|
|
if (vp->do_assign)
|
|
(*(vp->assign))();
|
|
}
|
|
|
|
/* Load PROCINFO and ENVIRON */
|
|
if (! do_traditional)
|
|
load_procinfo();
|
|
load_environ();
|
|
}
|
|
|
|
/* path_environ --- put path variable into environment if not already there */
|
|
|
|
static void
|
|
path_environ(const char *pname, const char *dflt)
|
|
{
|
|
const char *val;
|
|
NODE **aptr;
|
|
NODE *tmp;
|
|
|
|
tmp = make_string(pname, strlen(pname));
|
|
/*
|
|
* On VMS, environ[] only holds a subset of what getenv() can
|
|
* find, so look AWKPATH up before resorting to default path.
|
|
*/
|
|
val = getenv(pname);
|
|
if (val == NULL || *val == '\0')
|
|
val = dflt;
|
|
aptr = assoc_lookup(ENVIRON_node, tmp);
|
|
/*
|
|
* If original value was the empty string, set it to
|
|
* the default value.
|
|
*/
|
|
if ((*aptr)->stlen == 0) {
|
|
unref(*aptr);
|
|
*aptr = make_string(val, strlen(val));
|
|
}
|
|
|
|
unref(tmp);
|
|
}
|
|
|
|
/* load_environ --- populate the ENVIRON array */
|
|
|
|
static NODE *
|
|
load_environ()
|
|
{
|
|
#if ! (defined(VMS) && defined(__DECC))
|
|
extern char **environ;
|
|
#endif
|
|
char *var, *val;
|
|
int i;
|
|
NODE *sub, *newval;
|
|
static bool been_here = false;
|
|
|
|
if (been_here)
|
|
return ENVIRON_node;
|
|
|
|
been_here = true;
|
|
|
|
ENVIRON_node = install_symbol(estrdup("ENVIRON", 7), Node_var_array);
|
|
|
|
// Force string functions; if the first element in environ[]
|
|
// looks like "0=foo" we end up with the cint_funcs and that's
|
|
// not what we want, we just get core dumps.
|
|
ENVIRON_node->array_funcs = & str_array_func;
|
|
|
|
for (i = 0; environ[i] != NULL; i++) {
|
|
static char nullstr[] = "";
|
|
|
|
var = environ[i];
|
|
val = strchr(var, '=');
|
|
if (val != NULL)
|
|
*val++ = '\0';
|
|
else
|
|
val = nullstr;
|
|
sub = make_string(var, strlen(var));
|
|
newval = make_string(val, strlen(val));
|
|
newval->flags |= USER_INPUT;
|
|
assoc_set(ENVIRON_node, sub, newval);
|
|
|
|
/* restore '=' so that system() gets a valid environment */
|
|
if (val != nullstr)
|
|
*--val = '=';
|
|
}
|
|
/*
|
|
* Put AWKPATH and AWKLIBPATH into ENVIRON if not already there.
|
|
* This allows querying it from within awk programs.
|
|
*
|
|
* October 2014:
|
|
* If their values are "", override with the default values;
|
|
* since 2.10 AWKPATH used default value if environment's
|
|
* value was "".
|
|
*/
|
|
path_environ("AWKPATH", defpath);
|
|
path_environ("AWKLIBPATH", deflibpath);
|
|
|
|
/* set up array functions */
|
|
init_env_array(ENVIRON_node);
|
|
|
|
return ENVIRON_node;
|
|
}
|
|
|
|
/* load_procinfo_argv --- populate PROCINFO["argv"] */
|
|
|
|
static void
|
|
load_procinfo_argv()
|
|
{
|
|
NODE *sub;
|
|
NODE *val;
|
|
NODE *argv_array;
|
|
int i;
|
|
|
|
// build the sub-array first
|
|
getnode(argv_array);
|
|
memset(argv_array, '\0', sizeof(NODE)); /* valgrind wants this */
|
|
null_array(argv_array);
|
|
argv_array->parent_array = PROCINFO_node;
|
|
argv_array->vname = estrdup("argv", 4);
|
|
for (i = 0; d_argv[i] != NULL; i++) {
|
|
sub = make_number(i);
|
|
val = make_string(d_argv[i], strlen(d_argv[i]));
|
|
assoc_set(argv_array, sub, val);
|
|
}
|
|
|
|
// hook it into PROCINFO
|
|
sub = make_string("argv", 4);
|
|
assoc_set(PROCINFO_node, sub, argv_array);
|
|
}
|
|
|
|
/* load_procinfo --- populate the PROCINFO array */
|
|
|
|
static NODE *
|
|
load_procinfo()
|
|
{
|
|
#if defined (HAVE_GETGROUPS) && defined(NGROUPS_MAX) && NGROUPS_MAX > 0
|
|
int i;
|
|
#endif
|
|
#if (defined (HAVE_GETGROUPS) && defined(NGROUPS_MAX) && NGROUPS_MAX > 0) || defined(HAVE_MPFR)
|
|
char name[100];
|
|
#endif
|
|
AWKNUM value;
|
|
static bool been_here = false;
|
|
|
|
if (been_here)
|
|
return PROCINFO_node;
|
|
|
|
been_here = true;
|
|
|
|
PROCINFO_node = install_symbol(estrdup("PROCINFO", 8), Node_var_array);
|
|
|
|
update_PROCINFO_str("version", VERSION);
|
|
update_PROCINFO_str("strftime", def_strftime_format);
|
|
update_PROCINFO_str("platform", platform_name());
|
|
|
|
#ifdef HAVE_MPFR
|
|
sprintf(name, "GNU MPFR %s", mpfr_get_version());
|
|
update_PROCINFO_str("mpfr_version", name);
|
|
sprintf(name, "GNU MP %s", gmp_version);
|
|
update_PROCINFO_str("gmp_version", name);
|
|
update_PROCINFO_num("prec_max", MPFR_PREC_MAX);
|
|
update_PROCINFO_num("prec_min", MPFR_PREC_MIN);
|
|
#endif
|
|
|
|
#ifdef DYNAMIC
|
|
update_PROCINFO_num("api_major", GAWK_API_MAJOR_VERSION);
|
|
update_PROCINFO_num("api_minor", GAWK_API_MINOR_VERSION);
|
|
#endif
|
|
|
|
#ifdef GETPGRP_VOID
|
|
#define getpgrp_arg() /* nothing */
|
|
#else
|
|
#define getpgrp_arg() getpid()
|
|
#endif
|
|
|
|
value = getpgrp(getpgrp_arg());
|
|
update_PROCINFO_num("pgrpid", value);
|
|
|
|
/*
|
|
* Could put a lot of this into a table, but then there's
|
|
* portability problems declaring all the functions. So just
|
|
* do it the slow and stupid way. Sigh.
|
|
*/
|
|
|
|
value = getpid();
|
|
update_PROCINFO_num("pid", value);
|
|
|
|
value = getppid();
|
|
update_PROCINFO_num("ppid", value);
|
|
|
|
value = getuid();
|
|
update_PROCINFO_num("uid", value);
|
|
|
|
value = geteuid();
|
|
update_PROCINFO_num("euid", value);
|
|
|
|
value = getgid();
|
|
update_PROCINFO_num("gid", value);
|
|
|
|
value = getegid();
|
|
update_PROCINFO_num("egid", value);
|
|
|
|
update_PROCINFO_str("FS", current_field_sep_str());
|
|
|
|
#if defined (HAVE_GETGROUPS) && defined(NGROUPS_MAX) && NGROUPS_MAX > 0
|
|
for (i = 0; i < ngroups; i++) {
|
|
sprintf(name, "group%d", i + 1);
|
|
value = groupset[i];
|
|
update_PROCINFO_num(name, value);
|
|
}
|
|
if (groupset) {
|
|
efree(groupset);
|
|
groupset = NULL;
|
|
}
|
|
#endif
|
|
load_procinfo_argv();
|
|
return PROCINFO_node;
|
|
}
|
|
|
|
/* is_std_var --- return true if a variable is a standard variable */
|
|
|
|
int
|
|
is_std_var(const char *var)
|
|
{
|
|
const struct varinit *vp;
|
|
|
|
for (vp = varinit; vp->name != NULL; vp++) {
|
|
if (strcmp(vp->name, var) == 0) {
|
|
if ((do_traditional || do_posix) && (vp->flags & NON_STANDARD) != 0)
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/*
|
|
* is_off_limits_var --- return true if a variable is off limits
|
|
* to extension functions
|
|
*/
|
|
|
|
int
|
|
is_off_limits_var(const char *var)
|
|
{
|
|
const struct varinit *vp;
|
|
|
|
for (vp = varinit; vp->name != NULL; vp++) {
|
|
if (strcmp(vp->name, var) == 0)
|
|
return ((vp->flags & NOT_OFF_LIMITS) == 0);
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/* get_spec_varname --- return the name of a special variable
|
|
with the given assign or update routine.
|
|
*/
|
|
|
|
const char *
|
|
get_spec_varname(Func_ptr fptr)
|
|
{
|
|
const struct varinit *vp;
|
|
|
|
if (! fptr)
|
|
return NULL;
|
|
for (vp = varinit; vp->name != NULL; vp++) {
|
|
if (vp->assign == fptr || vp->update == fptr)
|
|
return vp->name;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
|
|
/* arg_assign --- process a command-line assignment */
|
|
|
|
int
|
|
arg_assign(char *arg, bool initing)
|
|
{
|
|
char *cp, *cp2;
|
|
bool badvar;
|
|
NODE *var;
|
|
NODE *it;
|
|
NODE **lhs;
|
|
long save_FNR;
|
|
|
|
if (! initing && disallow_var_assigns)
|
|
return false; /* --exec */
|
|
|
|
cp = strchr(arg, '=');
|
|
|
|
if (cp == NULL) {
|
|
if (! initing)
|
|
return false; /* This is file name, not assignment. */
|
|
|
|
fprintf(stderr,
|
|
_("%s: `%s' argument to `-v' not in `var=value' form\n\n"),
|
|
myname, arg);
|
|
usage(EXIT_FAILURE, stderr);
|
|
}
|
|
|
|
*cp++ = '\0';
|
|
|
|
/* avoid false source indications in a fatal message */
|
|
source = NULL;
|
|
sourceline = 0;
|
|
save_FNR = FNR;
|
|
FNR = 0;
|
|
|
|
/* first check that the variable name has valid syntax */
|
|
badvar = false;
|
|
if (! is_letter((unsigned char) arg[0]))
|
|
badvar = true;
|
|
else
|
|
for (cp2 = arg+1; *cp2; cp2++)
|
|
if (! is_identchar((unsigned char) *cp2) && *cp2 != ':') {
|
|
badvar = true;
|
|
break;
|
|
}
|
|
|
|
if (badvar) {
|
|
if (initing)
|
|
fatal(_("`%s' is not a legal variable name"), arg);
|
|
|
|
if (do_lint)
|
|
lintwarn(_("`%s' is not a variable name, looking for file `%s=%s'"),
|
|
arg, arg, cp);
|
|
|
|
goto done;
|
|
}
|
|
|
|
// Assigning a string or typed regex
|
|
|
|
if (! validate_qualified_name(arg)) {
|
|
badvar = true;
|
|
goto done;
|
|
}
|
|
|
|
if (check_special(arg) >= 0)
|
|
fatal(_("cannot use gawk builtin `%s' as variable name"), arg);
|
|
|
|
if (! initing) {
|
|
var = lookup(arg);
|
|
if (var != NULL && var->type == Node_func)
|
|
fatal(_("cannot use function `%s' as variable name"), arg);
|
|
}
|
|
|
|
cp2 = cp + strlen(cp) - 1; // end char
|
|
if (! do_traditional
|
|
&& strlen(cp) >= 3 // '@/' doesn't do it.
|
|
&& cp[0] == '@' && cp[1] == '/' && *cp2 == '/') {
|
|
// typed regex
|
|
size_t len = strlen(cp) - 3;
|
|
|
|
ezalloc(cp2, char *, len + 1, "arg_assign");
|
|
memcpy(cp2, cp + 2, len);
|
|
|
|
it = make_typed_regex(cp2, len);
|
|
// fall through to variable setup
|
|
} else {
|
|
// string assignment
|
|
|
|
// POSIX disallows any newlines inside strings
|
|
// The scanner handles that for program files.
|
|
// We have to check here for strings passed to -v.
|
|
if (do_posix && strchr(cp, '\n') != NULL)
|
|
fatal(_("POSIX does not allow physical newlines in string values"));
|
|
|
|
/*
|
|
* BWK awk expands escapes inside assignments.
|
|
* This makes sense, so we do it too.
|
|
* In addition, remove \-<newline> as in scanning.
|
|
*/
|
|
it = make_str_node(cp, strlen(cp), SCAN | ELIDE_BACK_NL);
|
|
it->flags |= USER_INPUT;
|
|
#ifdef LC_NUMERIC
|
|
/*
|
|
* See comment above about locale decimal point.
|
|
*/
|
|
if (do_posix)
|
|
setlocale(LC_NUMERIC, "C");
|
|
#endif /* LC_NUMERIC */
|
|
(void) force_number(it);
|
|
#ifdef LC_NUMERIC
|
|
if (do_posix)
|
|
setlocale(LC_NUMERIC, locale);
|
|
#endif /* LC_NUMERIC */
|
|
}
|
|
|
|
/*
|
|
* since we are restoring the original text of ARGV later,
|
|
* need to copy the variable name part if we don't want
|
|
* name like v=abc instead of just v in var->vname
|
|
*/
|
|
|
|
cp2 = estrdup(arg, cp - arg); /* var name */
|
|
|
|
var = variable(0, cp2, Node_var);
|
|
if (var == NULL) /* error */
|
|
final_exit(EXIT_FATAL);
|
|
|
|
if (var->type == Node_var && var->var_update)
|
|
var->var_update();
|
|
lhs = get_lhs(var, false);
|
|
unref(*lhs);
|
|
*lhs = it;
|
|
/* check for set_FOO() routine */
|
|
if (var->type == Node_var && var->var_assign)
|
|
var->var_assign();
|
|
|
|
done:
|
|
if (! initing)
|
|
*--cp = '='; /* restore original text of ARGV */
|
|
FNR = save_FNR;
|
|
return ! badvar;
|
|
}
|
|
|
|
/* catchsig --- catch signals */
|
|
|
|
static void
|
|
catchsig(int sig)
|
|
{
|
|
if (sig == SIGFPE) {
|
|
fatal(_("floating point exception"));
|
|
} else if (sig == SIGSEGV
|
|
#ifdef SIGBUS
|
|
|| sig == SIGBUS
|
|
#endif
|
|
) {
|
|
if (errcount > 0) // assume a syntax error corrupted our data structures
|
|
exit(EXIT_FATAL);
|
|
|
|
set_loc(__FILE__, __LINE__);
|
|
msg(_("fatal error: internal error"));
|
|
/* fatal won't abort() if not compiled for debugging */
|
|
// GLIBC 2.27 doesn't necessarily flush on abort. Sigh.
|
|
fflush(NULL);
|
|
abort();
|
|
} else
|
|
cant_happen("unexpected signal, number %d (%s)", sig, strsignal(sig));
|
|
/* NOTREACHED */
|
|
}
|
|
|
|
#ifdef HAVE_LIBSIGSEGV
|
|
/* catchsegv --- for use with libsigsegv */
|
|
|
|
static int
|
|
catchsegv(void *fault_address, int serious)
|
|
{
|
|
if (errcount > 0) // assume a syntax error corrupted our data structures
|
|
exit(EXIT_FATAL);
|
|
|
|
set_loc(__FILE__, __LINE__);
|
|
msg(_("fatal error: internal error: segfault"));
|
|
fflush(NULL);
|
|
abort();
|
|
/*NOTREACHED*/
|
|
return 0;
|
|
}
|
|
|
|
/* catchstackoverflow --- for use with libsigsegv */
|
|
|
|
static void
|
|
catchstackoverflow(int emergency, stackoverflow_context_t scp)
|
|
{
|
|
set_loc(__FILE__, __LINE__);
|
|
msg(_("fatal error: internal error: stack overflow"));
|
|
fflush(NULL);
|
|
abort();
|
|
/*NOTREACHED*/
|
|
return;
|
|
}
|
|
#endif /* HAVE_LIBSIGSEGV */
|
|
|
|
/* nostalgia --- print the famous error message and die */
|
|
|
|
static void
|
|
nostalgia()
|
|
{
|
|
/*
|
|
* N.B.: This string is not gettextized, on purpose.
|
|
* So there.
|
|
*/
|
|
fprintf(stderr, "awk: bailing out near line 1\n");
|
|
fflush(stderr);
|
|
abort();
|
|
}
|
|
|
|
#ifdef USE_PERSISTENT_MALLOC
|
|
/* get_pma_version --- get a usable version string out of PMA */
|
|
|
|
const char *
|
|
get_pma_version()
|
|
{
|
|
static char buf[200];
|
|
const char *open, *close;
|
|
char *out;
|
|
const char *in;
|
|
|
|
/*
|
|
* The default version string looks like this:
|
|
* 2022.08Aug.03.1659520468 (Avon 7)
|
|
* Yucko. Just pull out the bits between the parens.
|
|
*/
|
|
|
|
open = strchr(pma_version, '(');
|
|
if (open == NULL)
|
|
return pma_version; // sigh.
|
|
|
|
open++;
|
|
close = strchr(open, ')');
|
|
if (close == NULL)
|
|
return pma_version; // sigh, again.
|
|
|
|
// copy over the short name
|
|
for (out = buf, in = open; in < close;)
|
|
*out++ = *in++;
|
|
|
|
*out++ = '\0';
|
|
|
|
return buf;
|
|
}
|
|
#endif
|
|
|
|
/* version --- print version message */
|
|
|
|
static void
|
|
version()
|
|
{
|
|
printf("%s", version_string);
|
|
#ifdef DYNAMIC
|
|
printf(", API %d.%d", GAWK_API_MAJOR_VERSION, GAWK_API_MINOR_VERSION);
|
|
#endif
|
|
#ifdef USE_PERSISTENT_MALLOC
|
|
printf(", PMA %s", get_pma_version());
|
|
#endif
|
|
#ifdef HAVE_MPFR
|
|
printf(", (GNU MPFR %s, GNU MP %s)", mpfr_get_version(), gmp_version);
|
|
#endif
|
|
printf("\n");
|
|
print_ext_versions();
|
|
|
|
/*
|
|
* Per GNU coding standards, print copyright info,
|
|
* then exit successfully, do nothing else.
|
|
*/
|
|
copyleft();
|
|
exit(EXIT_SUCCESS);
|
|
}
|
|
|
|
/* init_fds --- check for 0, 1, 2, open on /dev/null if possible */
|
|
|
|
static void
|
|
init_fds()
|
|
{
|
|
struct stat sbuf;
|
|
int fd;
|
|
int newfd;
|
|
char const *const opposite_mode[] = {"w", "r", "r"};
|
|
|
|
/* maybe no stderr, don't bother with error mesg */
|
|
for (fd = 0; fd <= 2; fd++) {
|
|
if (fstat(fd, &sbuf) < 0) {
|
|
#if MAKE_A_HEROIC_EFFORT
|
|
if (do_lint)
|
|
lintwarn(_("no pre-opened fd %d"), fd);
|
|
#endif
|
|
newfd = devopen("/dev/null", opposite_mode[fd]);
|
|
/* turn off some compiler warnings "set but not used" */
|
|
newfd += 0;
|
|
#ifdef MAKE_A_HEROIC_EFFORT
|
|
if (do_lint && newfd < 0)
|
|
lintwarn(_("could not pre-open /dev/null for fd %d"), fd);
|
|
#endif
|
|
}
|
|
}
|
|
}
|
|
|
|
/* init_groupset --- initialize groupset */
|
|
|
|
static void
|
|
init_groupset()
|
|
{
|
|
#if defined(HAVE_GETGROUPS) && defined(NGROUPS_MAX) && NGROUPS_MAX > 0
|
|
#ifdef GETGROUPS_NOT_STANDARD
|
|
/* For systems that aren't standards conformant, use old way. */
|
|
ngroups = NGROUPS_MAX;
|
|
#else
|
|
/*
|
|
* If called with 0 for both args, return value is
|
|
* total number of groups.
|
|
*/
|
|
ngroups = getgroups(0, NULL);
|
|
#endif
|
|
/* If an error or no groups, just give up and get on with life. */
|
|
if (ngroups <= 0)
|
|
return;
|
|
|
|
/* fill in groups */
|
|
emalloc(groupset, GETGROUPS_T *, ngroups * sizeof(GETGROUPS_T), "init_groupset");
|
|
|
|
ngroups = getgroups(ngroups, groupset);
|
|
/* same thing here, give up but keep going */
|
|
if (ngroups == -1) {
|
|
efree(groupset);
|
|
ngroups = 0;
|
|
groupset = NULL;
|
|
}
|
|
#endif
|
|
}
|
|
|
|
/* estrdup --- duplicate a string */
|
|
|
|
char *
|
|
estrdup(const char *str, size_t len)
|
|
{
|
|
char *s;
|
|
emalloc(s, char *, len + 1, "estrdup");
|
|
memcpy(s, str, len);
|
|
s[len] = '\0';
|
|
return s;
|
|
}
|
|
|
|
#if defined(HAVE_LOCALE_H)
|
|
|
|
/* init_locale --- initialize locale info. */
|
|
|
|
/*
|
|
* On some operating systems, the pointers in the struct returned
|
|
* by localeconv() can become dangling pointers after a call to
|
|
* setlocale(). So we do a deep copy.
|
|
*
|
|
* Thanks to KIMURA Koichi <kimura.koichi@canon.co.jp>.
|
|
*/
|
|
|
|
static void
|
|
init_locale(struct lconv *l)
|
|
{
|
|
struct lconv *t;
|
|
|
|
t = localeconv();
|
|
*l = *t;
|
|
l->thousands_sep = estrdup(t->thousands_sep, strlen(t->thousands_sep));
|
|
l->decimal_point = estrdup(t->decimal_point, strlen(t->decimal_point));
|
|
l->grouping = estrdup(t->grouping, strlen(t->grouping));
|
|
l->int_curr_symbol = estrdup(t->int_curr_symbol, strlen(t->int_curr_symbol));
|
|
l->currency_symbol = estrdup(t->currency_symbol, strlen(t->currency_symbol));
|
|
l->mon_decimal_point = estrdup(t->mon_decimal_point, strlen(t->mon_decimal_point));
|
|
l->mon_thousands_sep = estrdup(t->mon_thousands_sep, strlen(t->mon_thousands_sep));
|
|
l->mon_grouping = estrdup(t->mon_grouping, strlen(t->mon_grouping));
|
|
l->positive_sign = estrdup(t->positive_sign, strlen(t->positive_sign));
|
|
l->negative_sign = estrdup(t->negative_sign, strlen(t->negative_sign));
|
|
}
|
|
#endif /* LOCALE_H */
|
|
|
|
/* save_argv --- save argv array */
|
|
|
|
static void
|
|
save_argv(int argc, char **argv)
|
|
{
|
|
int i;
|
|
|
|
emalloc(d_argv, char **, (argc + 1) * sizeof(char *), "save_argv");
|
|
for (i = 0; i < argc; i++)
|
|
d_argv[i] = estrdup(argv[i], strlen(argv[i]));
|
|
d_argv[argc] = NULL;
|
|
}
|
|
|
|
/*
|
|
* update_global_values --- make sure the symbol table has correct values.
|
|
* Called from the grammar before dumping values.
|
|
*
|
|
* Also called when accessing through SYMTAB, and from api_sym_lookup().
|
|
*/
|
|
|
|
void
|
|
update_global_values()
|
|
{
|
|
const struct varinit *vp;
|
|
|
|
for (vp = varinit; vp->name; vp++) {
|
|
if (vp->update != NULL)
|
|
vp->update();
|
|
}
|
|
}
|
|
|
|
/* getenv_long --- read a long value (>= 0) from an environment var. */
|
|
|
|
long
|
|
getenv_long(const char *name)
|
|
{
|
|
const char *val;
|
|
long newval;
|
|
if ((val = getenv(name)) != NULL && isdigit((unsigned char) *val)) {
|
|
for (newval = 0; *val && isdigit((unsigned char) *val); val++)
|
|
newval = (newval * 10) + *val - '0';
|
|
return newval;
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
/* parse_args --- do the getopt_long thing */
|
|
|
|
static void
|
|
parse_args(int argc, char **argv)
|
|
{
|
|
/*
|
|
* The + on the front tells GNU getopt not to rearrange argv.
|
|
*/
|
|
const char *optlist = "+F:f:v:W;bcCd::D::e:E:ghi:Il:L::nNo::Op::MPrSstVYZ:";
|
|
int old_optind;
|
|
int c;
|
|
char *scan;
|
|
char *src;
|
|
|
|
/* we do error messages ourselves on invalid options */
|
|
opterr = false;
|
|
|
|
/* copy argv before getopt gets to it; used to restart the debugger */
|
|
save_argv(argc, argv);
|
|
|
|
/* option processing. ready, set, go! */
|
|
for (optopt = 0, old_optind = 1;
|
|
(c = getopt_long(argc, argv, optlist, optab, NULL)) != EOF;
|
|
optopt = 0, old_optind = optind) {
|
|
if (do_posix)
|
|
opterr = true;
|
|
|
|
switch (c) {
|
|
case 'F':
|
|
add_preassign(PRE_ASSIGN_FS, optarg);
|
|
break;
|
|
|
|
case 'E':
|
|
disallow_var_assigns = true;
|
|
/* fall through */
|
|
case 'f':
|
|
/*
|
|
* Allow multiple -f options.
|
|
* This makes function libraries real easy.
|
|
* Most of the magic is in the scanner.
|
|
*
|
|
* The following is to allow for whitespace at the end
|
|
* of a #! /bin/gawk line in an executable file
|
|
*/
|
|
scan = optarg;
|
|
if (argv[optind-1] != optarg)
|
|
while (isspace((unsigned char) *scan))
|
|
scan++;
|
|
src = (*scan == '\0' ? argv[optind++] : optarg);
|
|
(void) add_srcfile((src && src[0] == '-' && src[1] == '\0') ?
|
|
SRC_STDIN : SRC_FILE,
|
|
src, srcfiles, NULL, NULL);
|
|
|
|
break;
|
|
|
|
case 'v':
|
|
add_preassign(PRE_ASSIGN, optarg);
|
|
break;
|
|
|
|
case 'b':
|
|
do_binary = true;
|
|
break;
|
|
|
|
case 'c':
|
|
do_flags |= DO_TRADITIONAL;
|
|
break;
|
|
|
|
case 'C':
|
|
copyleft();
|
|
break;
|
|
|
|
case 'd':
|
|
do_flags |= DO_DUMP_VARS;
|
|
if (optarg != NULL && optarg[0] != '\0')
|
|
varfile = optarg;
|
|
break;
|
|
|
|
case 'D':
|
|
do_flags |= DO_DEBUG;
|
|
if (optarg != NULL && optarg[0] != '\0')
|
|
command_file = optarg;
|
|
break;
|
|
|
|
case 'e':
|
|
if (optarg[0] == '\0')
|
|
warning(_("empty argument to `-e/--source' ignored"));
|
|
else
|
|
(void) add_srcfile(SRC_CMDLINE, optarg, srcfiles, NULL, NULL);
|
|
break;
|
|
|
|
case 'g':
|
|
do_flags |= DO_INTL;
|
|
break;
|
|
|
|
case 'h':
|
|
/* write usage to stdout, per GNU coding stds */
|
|
usage(EXIT_SUCCESS, stdout);
|
|
break;
|
|
|
|
case 'i':
|
|
(void) add_srcfile(SRC_INC, optarg, srcfiles, NULL, NULL);
|
|
break;
|
|
|
|
case 'I':
|
|
do_itrace = true;
|
|
break;
|
|
|
|
case 'l':
|
|
(void) add_srcfile(SRC_EXTLIB, optarg, srcfiles, NULL, NULL);
|
|
break;
|
|
|
|
#ifndef NO_LINT
|
|
case 'L':
|
|
do_flags |= (DO_LINT_ALL|DO_LINT_EXTENSIONS);
|
|
if (optarg != NULL) {
|
|
if (strcmp(optarg, "fatal") == 0)
|
|
lintfunc = r_fatal;
|
|
else if (strcmp(optarg, "invalid") == 0) {
|
|
do_flags &= ~DO_LINT_ALL;
|
|
do_flags |= DO_LINT_INVALID;
|
|
}
|
|
else if (strcmp(optarg, "no-ext") == 0) {
|
|
do_flags &= ~DO_LINT_EXTENSIONS;
|
|
}
|
|
}
|
|
break;
|
|
|
|
case 't':
|
|
do_flags |= DO_LINT_OLD;
|
|
break;
|
|
#else
|
|
case 'L':
|
|
case 't':
|
|
break;
|
|
#endif
|
|
|
|
case 'n':
|
|
do_flags |= DO_NON_DEC_DATA;
|
|
break;
|
|
|
|
case 'N':
|
|
use_lc_numeric = true;
|
|
break;
|
|
|
|
case 'O':
|
|
do_optimize = true;
|
|
break;
|
|
|
|
case 'p':
|
|
if (do_pretty_print)
|
|
warning(_("`--profile' overrides `--pretty-print'"));
|
|
do_flags |= DO_PROFILE;
|
|
/* fall through */
|
|
case 'o':
|
|
if (c == 'o' && do_profile)
|
|
warning(_("`--profile' overrides `--pretty-print'"));
|
|
do_flags |= DO_PRETTY_PRINT;
|
|
if (optarg != NULL)
|
|
set_prof_file(optarg);
|
|
else
|
|
set_prof_file(DEFAULT_PROFILE);
|
|
break;
|
|
|
|
case 'M':
|
|
#ifdef HAVE_MPFR
|
|
do_flags |= DO_MPFR;
|
|
#else
|
|
warning(_("-M ignored: MPFR/GMP support not compiled in"));
|
|
#endif
|
|
break;
|
|
|
|
case 'P':
|
|
do_flags |= DO_POSIX;
|
|
break;
|
|
|
|
case 'r':
|
|
// This no longer has any effect. It remains for the
|
|
// lint check in main().
|
|
do_flags |= DO_INTERVALS;
|
|
break;
|
|
|
|
case 's':
|
|
do_optimize = false;
|
|
break;
|
|
|
|
case 'S':
|
|
do_flags |= DO_SANDBOX;
|
|
break;
|
|
|
|
case 'T': // --persist[=file]
|
|
#ifdef USE_PERSISTENT_MALLOC
|
|
if (optarg == NULL)
|
|
optarg = "/some/file";
|
|
fatal(_("Use `GAWK_PERSIST_FILE=%s gawk ...' instead of --persist."), optarg);
|
|
#else
|
|
warning(_("Persistent memory is not supported."));
|
|
#endif /* USE_PERSISTENT_MALLOC */
|
|
break;
|
|
|
|
case 'V':
|
|
do_version = true;
|
|
break;
|
|
|
|
case 'W': /* gawk specific options - now in getopt_long */
|
|
fprintf(stderr, _("%s: option `-W %s' unrecognized, ignored\n"),
|
|
argv[0], optarg);
|
|
break;
|
|
|
|
case 0:
|
|
/*
|
|
* getopt_long found an option that sets a variable
|
|
* instead of returning a letter. Do nothing, just
|
|
* cycle around for the next one.
|
|
*/
|
|
break;
|
|
|
|
case 'Y':
|
|
case 'Z':
|
|
#if defined(YYDEBUG) || defined(GAWKDEBUG)
|
|
if (c == 'Y') {
|
|
yydebug = 2;
|
|
break;
|
|
}
|
|
#endif
|
|
#if defined(LOCALEDEBUG)
|
|
if (c == 'Z') {
|
|
locale = optarg;
|
|
break;
|
|
}
|
|
#endif
|
|
/* if not debugging, fall through */
|
|
case '?':
|
|
default:
|
|
/*
|
|
* If not posix, an unrecognized option stops argument
|
|
* processing so that it can go into ARGV for the awk
|
|
* program to see. This makes use of ``#! /bin/gawk -f''
|
|
* easier.
|
|
*
|
|
* However, it's never simple. If optopt is set,
|
|
* an option that requires an argument didn't get the
|
|
* argument. We care because if opterr is 0, then
|
|
* getopt_long won't print the error message for us.
|
|
*/
|
|
if (! do_posix
|
|
&& (optopt == '\0' || strchr(optlist, optopt) == NULL)) {
|
|
/*
|
|
* can't just do optind--. In case of an
|
|
* option with >= 2 letters, getopt_long
|
|
* won't have incremented optind.
|
|
*/
|
|
optind = old_optind;
|
|
stopped_early = true;
|
|
goto out;
|
|
} else if (optopt != '\0') {
|
|
/* Use POSIX required message format */
|
|
fprintf(stderr,
|
|
_("%s: option requires an argument -- %c\n"),
|
|
myname, optopt);
|
|
usage(EXIT_FAILURE, stderr);
|
|
}
|
|
/* else
|
|
let getopt print error message for us */
|
|
break;
|
|
}
|
|
if (c == 'E') /* --exec ends option processing */
|
|
break;
|
|
}
|
|
out:
|
|
do_optimize = (do_optimize && ! do_pretty_print);
|
|
|
|
return;
|
|
}
|
|
|
|
/* set_locale_stuff --- setup the locale stuff */
|
|
|
|
static void
|
|
set_locale_stuff(void)
|
|
{
|
|
#if defined(LC_CTYPE)
|
|
setlocale(LC_CTYPE, locale);
|
|
#endif
|
|
#if defined(LC_COLLATE)
|
|
setlocale(LC_COLLATE, locale);
|
|
#endif
|
|
#if defined(LC_MESSAGES)
|
|
setlocale(LC_MESSAGES, locale);
|
|
#endif
|
|
#if defined(LC_NUMERIC) && defined(HAVE_LOCALE_H)
|
|
/*
|
|
* Force the issue here. According to POSIX 2001, decimal
|
|
* point is used for parsing source code and for command-line
|
|
* assignments and the locale value for processing input,
|
|
* number to string conversion, and printing output.
|
|
*
|
|
* 10/2005 --- see below also; we now only use the locale's
|
|
* decimal point if do_posix in effect.
|
|
*
|
|
* 9/2007:
|
|
* This is a mess. We need to get the locale's numeric info for
|
|
* the thousands separator for the %'d flag.
|
|
*/
|
|
setlocale(LC_NUMERIC, locale);
|
|
init_locale(& loc);
|
|
setlocale(LC_NUMERIC, "C");
|
|
#endif
|
|
#if defined(LC_TIME)
|
|
setlocale(LC_TIME, locale);
|
|
#endif
|
|
|
|
/* These must be done after calling setlocale */
|
|
(void) bindtextdomain(PACKAGE, locale_dir);
|
|
(void) textdomain(PACKAGE);
|
|
}
|
|
|
|
/* platform_name --- return the platform name */
|
|
|
|
static const char *
|
|
platform_name()
|
|
{
|
|
// Cygwin and Mac OS X count as POSIX
|
|
#if defined(__VMS)
|
|
return "vms";
|
|
#elif defined(__MINGW32__)
|
|
return "mingw";
|
|
#elif defined(USE_EBCDIC)
|
|
return "os390";
|
|
#else
|
|
return "posix";
|
|
#endif
|
|
}
|
|
|
|
/* set_current_namespace --- set current_namespace and handle memory management */
|
|
|
|
void
|
|
set_current_namespace(const char *new_namespace)
|
|
{
|
|
if (current_namespace != awk_namespace)
|
|
efree((void *) current_namespace);
|
|
|
|
current_namespace = new_namespace;
|
|
}
|