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70 lines
1.9 KiB
C
70 lines
1.9 KiB
C
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/*Environment handling for dynamic loader.
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Copyright (C) 1995, 1996, 1997, 1998 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 Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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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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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include <string.h>
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extern char **_environ;
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/* Walk through the environment of the process and return all entries
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starting with `LD_'. */
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char *
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internal_function
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_dl_next_ld_env_entry (char ***position)
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{
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char **current = *position;
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char *result = NULL;
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if (current == NULL)
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/* We start over. */
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current = _environ;
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while (result == NULL && *current != NULL)
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{
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if ((*current)[0] == 'L' && (*current)[1] == 'D' && (*current)[2] == '_')
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result = *current;
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++current;
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}
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/* Save current position for next visit. */
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*position = current;
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return result;
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}
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void
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unsetenv (const char *name)
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{
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const size_t len = strlen (name);
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char **ep;
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for (ep = _environ; *ep != NULL; ++ep)
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if (!strncmp (*ep, name, len) && (*ep)[len] == '=')
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{
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/* Found it. Remove this pointer by moving later ones back. */
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char **dp = ep;
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do
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dp[0] = dp[1];
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while (*dp++);
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/* Continue the loop in case NAME appears again. */
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}
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}
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