/src/sudo/plugins/sudoers/sudoers_hooks.c

Source
/*
 * SPDX-License-Identifier: ISC
 *
 * Copyright (c) 2000-2005, 2007-2019
 *  Todd C. Miller <Todd.Miller@sudo.ws>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 *
 * Sponsored in part by the Defense Advanced Research Projects
 * Agency (DARPA) and Air Force Research Laboratory, Air Force
 * Materiel Command, USAF, under agreement number F39502-99-1-0512.
 */

#include <config.h>

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>

#include <sudoers.h>

/*
 * Similar to setenv(3) but operates on a private copy of the environment.
 * Does not include warnings or debugging to avoid recursive calls.
 */
static int
sudo_setenv_nodebug(const char *var, const char *val, int overwrite)
{
    char *ep, *estring = NULL;
    const char *cp;
    size_t esize;
    int ret = -1;

    if (var == NULL || *var == '\0') {
  errno = EINVAL;
  goto done;
    }

    /*
     * POSIX says a var name with '=' is an error but BSD
     * just ignores the '=' and anything after it.
     */
    for (cp = var; *cp && *cp != '='; cp++)
  continue;
    esize = (size_t)(cp - var) + 2;
    if (val) {
  esize += strlen(val); /* glibc treats a NULL val as "" */
    }

    /* Allocate and fill in estring. */
    if ((estring = ep = malloc(esize)) == NULL)
  goto done;
    for (cp = var; *cp && *cp != '='; cp++)
  *ep++ = *cp;
    *ep++ = '=';
    if (val) {
  for (cp = val; *cp; cp++)
      *ep++ = *cp;
    }
    *ep = '\0';

    ret = sudo_putenv_nodebug(estring, true, overwrite);
done:
    if (ret == -1)
  free(estring);
    else
  sudoers_gc_add(GC_PTR, estring);
    return ret;
}

int
sudoers_hook_getenv(const char *name, char **value, void *closure)
{
    static bool in_progress = false; /* avoid recursion */

    if (in_progress || env_get() == NULL)
  return SUDO_HOOK_RET_NEXT;

    in_progress = true;

    /* Hack to make GNU gettext() find the sudoers locale when needed. */
    if (*name == 'L' && sudoers_getlocale() == SUDOERS_LOCALE_SUDOERS) {
  if (strcmp(name, "LANGUAGE") == 0 || strcmp(name, "LANG") == 0) {
      *value = NULL;
      goto done;
  }
  if (strcmp(name, "LC_ALL") == 0 || strcmp(name, "LC_MESSAGES") == 0) {
      *value = def_sudoers_locale;
      goto done;
  }
    }

    *value = sudo_getenv_nodebug(name);
done:
    in_progress = false;
    return SUDO_HOOK_RET_STOP;
}

int
sudoers_hook_putenv(char *string, void *closure)
{
    static bool in_progress = false; /* avoid recursion */

    if (in_progress || env_get() == NULL)
  return SUDO_HOOK_RET_NEXT;

    in_progress = true;
    sudo_putenv_nodebug(string, true, true);
    in_progress = false;
    return SUDO_HOOK_RET_STOP;
}

int
sudoers_hook_setenv(const char *name, const char *value, int overwrite, void *closure)
{
    static bool in_progress = false; /* avoid recursion */

    if (in_progress || env_get() == NULL)
  return SUDO_HOOK_RET_NEXT;

    in_progress = true;
    sudo_setenv_nodebug(name, value, overwrite);
    in_progress = false;
    return SUDO_HOOK_RET_STOP;
}

int
sudoers_hook_unsetenv(const char *name, void *closure)
{
    static bool in_progress = false; /* avoid recursion */

    if (in_progress || env_get() == NULL)
  return SUDO_HOOK_RET_NEXT;

    in_progress = true;
    sudo_unsetenv_nodebug(name);
    in_progress = false;
    return SUDO_HOOK_RET_STOP;
}

Line	Count	Source
1		/*
2		* SPDX-License-Identifier: ISC
3		*
4		* Copyright (c) 2000-2005, 2007-2019
5		* Todd C. Miller <Todd.Miller@sudo.ws>
6		*
7		* Permission to use, copy, modify, and distribute this software for any
8		* purpose with or without fee is hereby granted, provided that the above
9		* copyright notice and this permission notice appear in all copies.
10		*
11		* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
12		* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
13		* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
14		* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
15		* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
16		* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
17		* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
18		*
19		* Sponsored in part by the Defense Advanced Research Projects
20		* Agency (DARPA) and Air Force Research Laboratory, Air Force
21		* Materiel Command, USAF, under agreement number F39502-99-1-0512.
22		*/
23
24		#include <config.h>
25
26		#include <stdio.h>
27		#include <stdlib.h>
28		#include <string.h>
29		#include <errno.h>
30
31		#include <sudoers.h>
32
33		/*
34		* Similar to setenv(3) but operates on a private copy of the environment.
35		* Does not include warnings or debugging to avoid recursive calls.
36		*/
37		static int
38		sudo_setenv_nodebug(const char var, const char val, int overwrite)
39	0	{
40	0	char ep, estring = NULL;
41	0	const char *cp;
42	0	size_t esize;
43	0	int ret = -1;
44
45	0	if (var == NULL \|\| *var == '\0') {
46	0	errno = EINVAL;
47	0	goto done;
48	0	}
49
50		/*
51		* POSIX says a var name with '=' is an error but BSD
52		* just ignores the '=' and anything after it.
53		*/
54	0	for (cp = var; cp && cp != '='; cp++)
55	0	continue;
56	0	esize = (size_t)(cp - var) + 2;
57	0	if (val) {
58	0	esize += strlen(val); /* glibc treats a NULL val as "" */
59	0	}
60
61		/* Allocate and fill in estring. */
62	0	if ((estring = ep = malloc(esize)) == NULL)
63	0	goto done;
64	0	for (cp = var; cp && cp != '='; cp++)
65	0	ep++ = cp;
66	0	*ep++ = '=';
67	0	if (val) {
68	0	for (cp = val; *cp; cp++)
69	0	ep++ = cp;
70	0	}
71	0	*ep = '\0';
72
73	0	ret = sudo_putenv_nodebug(estring, true, overwrite);
74	0	done:
75	0	if (ret == -1)
76	0	free(estring);
77	0	else
78	0	sudoers_gc_add(GC_PTR, estring);
79	0	return ret;
80	0	}
81
82		int
83		sudoers_hook_getenv(const char name, char value, void closure)
84	0	{
85	0	static bool in_progress = false; /* avoid recursion */
86
87	0	if (in_progress \|\| env_get() == NULL)
88	0	return SUDO_HOOK_RET_NEXT;
89
90	0	in_progress = true;
91
92		/* Hack to make GNU gettext() find the sudoers locale when needed. */
93	0	if (*name == 'L' && sudoers_getlocale() == SUDOERS_LOCALE_SUDOERS) {
94	0	if (strcmp(name, "LANGUAGE") == 0 \|\| strcmp(name, "LANG") == 0) {
95	0	*value = NULL;
96	0	goto done;
97	0	}
98	0	if (strcmp(name, "LC_ALL") == 0 \|\| strcmp(name, "LC_MESSAGES") == 0) {
99	0	*value = def_sudoers_locale;
100	0	goto done;
101	0	}
102	0	}
103
104	0	*value = sudo_getenv_nodebug(name);
105	0	done:
106	0	in_progress = false;
107	0	return SUDO_HOOK_RET_STOP;
108	0	}
109
110		int
111		sudoers_hook_putenv(char string, void closure)
112	0	{
113	0	static bool in_progress = false; /* avoid recursion */
114
115	0	if (in_progress \|\| env_get() == NULL)
116	0	return SUDO_HOOK_RET_NEXT;
117
118	0	in_progress = true;
119	0	sudo_putenv_nodebug(string, true, true);
120	0	in_progress = false;
121	0	return SUDO_HOOK_RET_STOP;
122	0	}
123
124		int
125		sudoers_hook_setenv(const char name, const char value, int overwrite, void *closure)
126	0	{
127	0	static bool in_progress = false; /* avoid recursion */
128
129	0	if (in_progress \|\| env_get() == NULL)
130	0	return SUDO_HOOK_RET_NEXT;
131
132	0	in_progress = true;
133	0	sudo_setenv_nodebug(name, value, overwrite);
134	0	in_progress = false;
135	0	return SUDO_HOOK_RET_STOP;
136	0	}
137
138		int
139		sudoers_hook_unsetenv(const char name, void closure)
140	0	{
141	0	static bool in_progress = false; /* avoid recursion */
142
143	0	if (in_progress \|\| env_get() == NULL)
144	0	return SUDO_HOOK_RET_NEXT;
145
146	0	in_progress = true;
147	0	sudo_unsetenv_nodebug(name);
148	0	in_progress = false;
149	0	return SUDO_HOOK_RET_STOP;
150	0	}

Coverage Report

Created: 2025-11-09 06:37