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authorStan Shebs <shebs@codesourcery.com>1999-04-16 01:34:07 +0000
committerStan Shebs <shebs@codesourcery.com>1999-04-16 01:34:07 +0000
commit071ea11e85eb9d529cc5eb3d35f6247466a21b99 (patch)
tree5deda65b8d7b04d1f4cbc534c3206d328e1267ec /gdb/environ.c
parent1730ec6b1848f0f32154277f788fb29f88d8475b (diff)
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Initial creation of sourceware repository
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-rw-r--r--gdb/environ.c194
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diff --git a/gdb/environ.c b/gdb/environ.c
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--- a/gdb/environ.c
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@@ -1,194 +0,0 @@
-/* environ.c -- library for manipulating environments for GNU.
- Copyright (C) 1986, 1989 Free Software Foundation, Inc.
-
-This program is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2 of the License, or
-(at your option) any later version.
-
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program; if not, write to the Free Software
-Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
-
-#define min(a, b) ((a) < (b) ? (a) : (b))
-#define max(a, b) ((a) > (b) ? (a) : (b))
-
-#include "defs.h"
-#include "environ.h"
-#include "gdb_string.h"
-#include "gdbcore.h"
-
-
-/* Return a new environment object. */
-
-struct environ *
-make_environ ()
-{
- register struct environ *e;
-
- e = (struct environ *) xmalloc (sizeof (struct environ));
-
- e->allocated = 10;
- e->vector = (char **) xmalloc ((e->allocated + 1) * sizeof (char *));
- e->vector[0] = 0;
- return e;
-}
-
-/* Free an environment and all the strings in it. */
-
-void
-free_environ (e)
- register struct environ *e;
-{
- register char **vector = e->vector;
-
- while (*vector)
- free (*vector++);
-
- free (e);
-}
-
-/* Copy the environment given to this process into E.
- Also copies all the strings in it, so we can be sure
- that all strings in these environments are safe to free. */
-
-void
-init_environ (e)
- register struct environ *e;
-{
- extern char **environ;
- register int i;
-
- if (environ == NULL)
- return;
-
- for (i = 0; environ[i]; i++) /*EMPTY*/;
-
- if (e->allocated < i)
- {
- e->allocated = max (i, e->allocated + 10);
- e->vector = (char **) xrealloc ((char *)e->vector,
- (e->allocated + 1) * sizeof (char *));
- }
-
- memcpy (e->vector, environ, (i + 1) * sizeof (char *));
-
- while (--i >= 0)
- {
- register int len = strlen (e->vector[i]);
- register char *new = (char *) xmalloc (len + 1);
- memcpy (new, e->vector[i], len + 1);
- e->vector[i] = new;
- }
-}
-
-/* Return the vector of environment E.
- This is used to get something to pass to execve. */
-
-char **
-environ_vector (e)
- struct environ *e;
-{
- return e->vector;
-}
-
-/* Return the value in environment E of variable VAR. */
-
-char *
-get_in_environ (e, var)
- const struct environ *e;
- const char *var;
-{
- register int len = strlen (var);
- register char **vector = e->vector;
- register char *s;
-
- for (; (s = *vector) != NULL; vector++)
- if (STREQN (s, var, len) && s[len] == '=')
- return &s[len + 1];
-
- return 0;
-}
-
-/* Store the value in E of VAR as VALUE. */
-
-void
-set_in_environ (e, var, value)
- struct environ *e;
- const char *var;
- const char *value;
-{
- register int i;
- register int len = strlen (var);
- register char **vector = e->vector;
- register char *s;
-
- for (i = 0; (s = vector[i]) != NULL; i++)
- if (STREQN (s, var, len) && s[len] == '=')
- break;
-
- if (s == 0)
- {
- if (i == e->allocated)
- {
- e->allocated += 10;
- vector = (char **) xrealloc ((char *)vector,
- (e->allocated + 1) * sizeof (char *));
- e->vector = vector;
- }
- vector[i + 1] = 0;
- }
- else
- free (s);
-
- s = (char *) xmalloc (len + strlen (value) + 2);
- strcpy (s, var);
- strcat (s, "=");
- strcat (s, value);
- vector[i] = s;
-
- /* This used to handle setting the PATH and GNUTARGET variables
- specially. The latter has been replaced by "set gnutarget"
- (which has worked since GDB 4.11). The former affects searching
- the PATH to find SHELL, and searching the PATH to find the
- argument of "symbol-file" or "exec-file". Maybe we should have
- some kind of "set exec-path" for that. But in any event, having
- "set env" affect anything besides the inferior is a bad idea.
- What if we want to change the environment we pass to the program
- without afecting GDB's behavior? */
-
- return;
-}
-
-/* Remove the setting for variable VAR from environment E. */
-
-void
-unset_in_environ (e, var)
- struct environ *e;
- char *var;
-{
- register int len = strlen (var);
- register char **vector = e->vector;
- register char *s;
-
- for (; (s = *vector) != NULL; vector++)
- {
- if (STREQN (s, var, len) && s[len] == '=')
- {
- free (s);
- /* Walk through the vector, shuffling args down by one, including
- the NULL terminator. Can't use memcpy() here since the regions
- overlap, and memmove() might not be available. */
- while ((vector[0] = vector[1]) != NULL)
- {
- vector++;
- }
- break;
- }
- }
-}