58 lines
1.1 KiB
C
58 lines
1.1 KiB
C
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/* Test for fdopen bugs. */
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <fcntl.h>
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#undef assert
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#define assert(x) \
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if (!(x)) \
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{ \
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fputs ("test failed: " #x "\n", stderr); \
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retval = 1; \
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goto the_end; \
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}
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char buffer[256];
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int
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main (int argc, char *argv[])
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{
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char name[] = "/tmp/tst-fdopen.XXXXXX";
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FILE *fp = NULL;
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int retval = 0;
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int fd;
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fd = mkstemp (name);
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if (fd == -1)
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{
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printf ("mkstemp failed: %m\n");
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return 1;
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}
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close (fd);
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fp = fopen (name, "w");
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assert (fp != NULL)
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fputs ("foobar and baz", fp);
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fclose (fp);
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fp = NULL;
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fd = open (name, O_RDONLY);
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assert (fd != -1);
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assert (lseek (fd, 5, SEEK_SET) == 5);
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/* The file position indicator associated with the new stream is set to
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the position indicated by the file offset associated with the file
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descriptor. */
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fp = fdopen (fd, "r");
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assert (fp != NULL);
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assert (getc (fp) == 'r');
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assert (getc (fp) == ' ');
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the_end:
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if (fp != NULL)
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fclose (fp);
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unlink (name);
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return retval;
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}
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