52 lines
1.7 KiB
C
52 lines
1.7 KiB
C
/* Copyright (C) 2015-2022 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library 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 GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <nss.h>
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#include <string.h>
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/* Rewrite VALUE to a valid field value in the NSS database. Invalid
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characters are replaced with a single space character ' '. If
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VALUE is NULL, the empty string is returned. *TO_BE_FREED is
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overwritten with a pointer the caller has to free if the function
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returns successfully. On failure, return NULL. */
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const char *
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__nss_rewrite_field (const char *value, char **to_be_freed)
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{
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*to_be_freed = NULL;
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if (value == NULL)
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return "";
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/* Search for non-allowed characters. */
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const char *p = strpbrk (value, __nss_invalid_field_characters);
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if (p == NULL)
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return value;
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*to_be_freed = __strdup (value);
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if (*to_be_freed == NULL)
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return NULL;
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/* Switch pointer to freshly-allocated buffer. */
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char *bad = *to_be_freed + (p - value);
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do
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{
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*bad = ' ';
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bad = strpbrk (bad + 1, __nss_invalid_field_characters);
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}
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while (bad != NULL);
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return *to_be_freed;
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}
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