+++ /dev/null
-/*
- * Copyright (c) 2000-2005, 2007-2010
- * Todd C. Miller <Todd.Miller@courtesan.com>
- *
- * 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 <sys/types.h>
-#include <sys/param.h>
-#include <sys/stat.h>
-#include <stdio.h>
-#ifdef STDC_HEADERS
-# include <stdlib.h>
-# include <stddef.h>
-#else
-# ifdef HAVE_STDLIB_H
-# include <stdlib.h>
-# endif
-#endif /* STDC_HEADERS */
-#ifdef HAVE_STRING_H
-# include <string.h>
-#endif /* HAVE_STRING_H */
-#ifdef HAVE_STRINGS_H
-# include <strings.h>
-#endif /* HAVE_STRINGS_H */
-#ifdef HAVE_UNISTD_H
-# include <unistd.h>
-#endif /* HAVE_UNISTD_H */
-#include <ctype.h>
-#include <errno.h>
-#include <pwd.h>
-
-#include "sudo.h"
-
-/*
- * Flags used in rebuild_env()
- */
-#undef DID_TERM
-#define DID_TERM 0x0001
-#undef DID_PATH
-#define DID_PATH 0x0002
-#undef DID_HOME
-#define DID_HOME 0x0004
-#undef DID_SHELL
-#define DID_SHELL 0x0008
-#undef DID_LOGNAME
-#define DID_LOGNAME 0x0010
-#undef DID_USER
-#define DID_USER 0x0020
-#undef DID_USERNAME
-#define DID_USERNAME 0x0040
-#undef DID_MAIL
-#define DID_MAIL 0x0080
-#undef DID_MAX
-#define DID_MAX 0x00ff
-
-#undef KEPT_TERM
-#define KEPT_TERM 0x0100
-#undef KEPT_PATH
-#define KEPT_PATH 0x0200
-#undef KEPT_HOME
-#define KEPT_HOME 0x0400
-#undef KEPT_SHELL
-#define KEPT_SHELL 0x0800
-#undef KEPT_LOGNAME
-#define KEPT_LOGNAME 0x1000
-#undef KEPT_USER
-#define KEPT_USER 0x2000
-#undef KEPT_USERNAME
-#define KEPT_USERNAME 0x4000
-#undef KEPT_MAIL
-#define KEPT_MAIL 0x8000
-#undef KEPT_MAX
-#define KEPT_MAX 0xff00
-
-struct environment {
- char **envp; /* pointer to the new environment */
- size_t env_size; /* size of new_environ in char **'s */
- size_t env_len; /* number of slots used, not counting NULL */
- int owned; /* do we own envp or is it the system's? */
-};
-
-/*
- * Prototypes
- */
-static void sudo_setenv __P((const char *, const char *, int));
-static void sudo_putenv __P((char *, int, int));
-
-extern char **environ; /* global environment */
-
-/*
- * Copy of the sudo-managed environment.
- */
-static struct environment env;
-
-/*
- * Default table of "bad" variables to remove from the environment.
- * XXX - how to omit TERMCAP if it starts with '/'?
- */
-static const char *initial_badenv_table[] = {
- "IFS",
- "CDPATH",
- "LOCALDOMAIN",
- "RES_OPTIONS",
- "HOSTALIASES",
- "NLSPATH",
- "PATH_LOCALE",
- "LD_*",
- "_RLD*",
-#ifdef __hpux
- "SHLIB_PATH",
-#endif /* __hpux */
-#ifdef _AIX
- "LDR_*",
- "LIBPATH",
- "AUTHSTATE",
-#endif
-#ifdef __APPLE__
- "DYLD_*",
-#endif
-#ifdef HAVE_KERB4
- "KRB_CONF*",
- "KRBCONFDIR",
- "KRBTKFILE",
-#endif /* HAVE_KERB4 */
-#ifdef HAVE_KERB5
- "KRB5_CONFIG*",
- "KRB5_KTNAME",
-#endif /* HAVE_KERB5 */
-#ifdef HAVE_SECURID
- "VAR_ACE",
- "USR_ACE",
- "DLC_ACE",
-#endif /* HAVE_SECURID */
- "TERMINFO", /* terminfo, exclusive path to terminfo files */
- "TERMINFO_DIRS", /* terminfo, path(s) to terminfo files */
- "TERMPATH", /* termcap, path(s) to termcap files */
- "TERMCAP", /* XXX - only if it starts with '/' */
- "ENV", /* ksh, file to source before script runs */
- "BASH_ENV", /* bash, file to source before script runs */
- "PS4", /* bash, prefix for lines in xtrace mode */
- "GLOBIGNORE", /* bash, globbing patterns to ignore */
- "SHELLOPTS", /* bash, extra command line options */
- "JAVA_TOOL_OPTIONS", /* java, extra command line options */
- "PERLIO_DEBUG ", /* perl, debugging output file */
- "PERLLIB", /* perl, search path for modules/includes */
- "PERL5LIB", /* perl 5, search path for modules/includes */
- "PERL5OPT", /* perl 5, extra command line options */
- "PERL5DB", /* perl 5, command used to load debugger */
- "FPATH", /* ksh, search path for functions */
- "NULLCMD", /* zsh, command for null file redirection */
- "READNULLCMD", /* zsh, command for null file redirection */
- "ZDOTDIR", /* zsh, search path for dot files */
- "TMPPREFIX", /* zsh, prefix for temporary files */
- "PYTHONHOME", /* python, module search path */
- "PYTHONPATH", /* python, search path */
- "PYTHONINSPECT", /* python, allow inspection */
- "PYTHONUSERBASE", /* python, per user site-packages directory */
- "RUBYLIB", /* ruby, library load path */
- "RUBYOPT", /* ruby, extra command line options */
- NULL
-};
-
-/*
- * Default table of variables to check for '%' and '/' characters.
- */
-static const char *initial_checkenv_table[] = {
- "COLORTERM",
- "LANG",
- "LANGUAGE",
- "LC_*",
- "LINGUAS",
- "TERM",
- NULL
-};
-
-/*
- * Default table of variables to preserve in the environment.
- */
-static const char *initial_keepenv_table[] = {
- "COLORS",
- "DISPLAY",
- "HOSTNAME",
- "KRB5CCNAME",
- "LS_COLORS",
- "PATH",
- "PS1",
- "PS2",
- "TZ",
- "XAUTHORITY",
- "XAUTHORIZATION",
- NULL
-};
-
-/*
- * Initialize env based on envp.
- */
-void
-env_init(lazy)
- int lazy;
-{
- char * const *ep;
- size_t len;
-
- for (ep = environ; *ep != NULL; ep++)
- continue;
- len = (size_t)(ep - environ);
-
- if (lazy) {
- /*
- * If we are already initialized due to lazy init (usualy via getenv())
- * we need to avoid calling malloc() as it may call getenv() itself.
- */
- env.envp = environ;
- env.env_len = len;
- env.env_size = len;
- } else if (!env.owned) {
- env.env_len = len;
- env.env_size = len + 1 + 128;
- env.envp = emalloc2(env.env_size, sizeof(char *));
-#ifdef ENV_DEBUG
- memset(env.envp, 0, env.env_size * sizeof(char *));
-#endif
- memcpy(env.envp, environ, len * sizeof(char *));
- env.envp[len] = '\0';
- env.owned = TRUE;
- }
-}
-
-char **
-env_get()
-{
- return env.envp;
-}
-
-/*
- * Similar to setenv(3) but operates on sudo's private copy of the environment
- * (not environ) and it always overwrites. The dupcheck param determines
- * whether we need to verify that the variable is not already set.
- */
-static void
-sudo_setenv(var, val, dupcheck)
- const char *var;
- const char *val;
- int dupcheck;
-{
- char *estring;
- size_t esize;
-
- esize = strlen(var) + 1 + strlen(val) + 1;
- estring = emalloc(esize);
-
- /* Build environment string and insert it. */
- if (strlcpy(estring, var, esize) >= esize ||
- strlcat(estring, "=", esize) >= esize ||
- strlcat(estring, val, esize) >= esize) {
-
- errorx(1, "internal error, sudo_setenv() overflow");
- }
- sudo_putenv(estring, dupcheck, TRUE);
-}
-
-/*
- * Version of getenv(3) that uses our own environ pointer.
- */
-char *
-getenv(var)
- const char *var;
-{
- char *cp, **ev;
- size_t vlen = strlen(var);
-
- if (env.envp == NULL)
- env_init(TRUE);
-
- for (ev = env.envp; (cp = *ev) != NULL; ev++) {
- if (strncmp(var, cp, vlen) == 0 && cp[vlen] == '=')
- return cp + vlen + 1;
- }
- return NULL;
-}
-
-/*
- * Version of setenv(3) that uses our own environ pointer.
- */
-int
-setenv(var, val, overwrite)
- const char *var;
- const char *val;
- int overwrite;
-{
- char *estring, *ep;
- const char *cp;
- size_t esize;
-
- if (!var || *var == '\0') {
- errno = EINVAL;
- return(-1);
- }
-
- if (env.envp == NULL)
- env_init(TRUE);
-
- /*
- * POSIX says a var name with '=' is an error but BSD
- * just ignores the '=' and anything after it.
- */
- for (cp = var; *cp && *cp != '='; cp++)
- ;
- esize = (size_t)(cp - var) + 2;
- if (val) {
- esize += strlen(val); /* glibc treats a NULL val as "" */
- }
-
- /* Allocate and fill in estring. */
- estring = ep = emalloc(esize);
- for (cp = var; *cp && *cp != '='; cp++)
- *ep++ = *cp;
- *ep++ = '=';
- if (val) {
- for (cp = val; *cp; cp++)
- *ep++ = *cp;
- }
- *ep = '\0';
-
-#ifdef ENV_DEBUG
- if (env.envp[env.env_len] != NULL)
- errorx(1, "setenv: corrupted envp, len mismatch");
-#endif
- sudo_putenv(estring, TRUE, overwrite);
- return(0);
-}
-
-/*
- * Version of unsetenv(3) that uses our own environ pointer.
- */
-#ifdef UNSETENV_VOID
-void
-#else
-int
-#endif
-unsetenv(var)
- const char *var;
-{
- char **ep;
- size_t len;
-
- if (var == NULL || *var == '\0' || strchr(var, '=') != NULL) {
- errno = EINVAL;
-#ifdef UNSETENV_VOID
- return;
-#else
- return(-1);
-#endif
- }
-
- if (env.envp == NULL)
- env_init(TRUE);
-
-#ifdef ENV_DEBUG
- if (env.envp[env.env_len] != NULL)
- errorx(1, "unsetenv: corrupted envp, len mismatch");
-#endif
-
- len = strlen(var);
- for (ep = env.envp; *ep != NULL;) {
- if (strncmp(var, *ep, len) == 0 && (*ep)[len] == '=') {
- /* Found it; shift remainder + NULL over by one. */
- char **cur = ep;
- while ((*cur = *(cur + 1)) != NULL)
- cur++;
- /* Keep going, could be multiple instances of the var. */
- } else {
- ep++;
- }
- }
- env.env_len = ep - env.envp;
-#ifndef UNSETENV_VOID
- return(0);
-#endif
-}
-
-/*
- * Version of putenv(3) that uses our own environ pointer.
- */
-int
-#ifdef PUTENV_CONST
-putenv(const char *string)
-#else
-putenv(string)
- char *string;
-#endif
-{
- if (env.envp == NULL)
- env_init(TRUE);
-
- if (strchr(string, '=') == NULL) {
- errno = EINVAL;
- return(-1);
- }
-#ifdef ENV_DEBUG
- if (env.envp[env.env_len] != NULL)
- errorx(1, "putenv: corrupted envp, len mismatch");
-#endif
- sudo_putenv((char *)string, TRUE, TRUE);
- return(0);
-}
-
-/*
- * Similar to putenv(3) but operates on sudo's private copy of the
- * environment (not environ) and it always overwrites. The dupcheck param
- * determines whether we need to verify that the variable is not already set.
- * Will only overwrite an existing variable if overwrite is set.
- */
-static void
-sudo_putenv(str, dupcheck, overwrite)
- char *str;
- int dupcheck;
- int overwrite;
-{
- char **ep;
- size_t len;
- int found = FALSE;
-
- /* Make sure there is room for the new entry plus a NULL. */
- if (env.env_len + 2 > env.env_size) {
- env.env_size += 128;
- if (env.owned) {
- env.envp = erealloc3(env.envp, env.env_size, sizeof(char *));
- } else {
- /* We don't own env.envp, allocate a new one. */
- ep = emalloc2(env.env_size, sizeof(char *));
- memcpy(ep, env.envp, env.env_size * sizeof(char *));
- env.envp = ep;
- env.owned = TRUE;
- }
-#ifdef ENV_DEBUG
- memset(env.envp + env.env_len, 0,
- (env.env_size - env.env_len) * sizeof(char *));
-#endif
- }
-
-#ifdef ENV_DEBUG
- if (env.envp[env.env_len] != NULL)
- errorx(1, "sudo_putenv: corrupted envp, len mismatch");
-#endif
-
- if (dupcheck) {
- len = (strchr(str, '=') - str) + 1;
- for (ep = env.envp; !found && *ep != NULL; ep++) {
- if (strncmp(str, *ep, len) == 0) {
- if (overwrite)
- *ep = str;
- found = TRUE;
- }
- }
- /* Prune out duplicate variables. */
- if (found && overwrite) {
- while (*ep != NULL) {
- if (strncmp(str, *ep, len) == 0) {
- char **cur = ep;
- while ((*cur = *(cur + 1)) != NULL)
- cur++;
- } else {
- ep++;
- }
- }
- env.env_len = ep - env.envp;
- }
- }
-
- if (!found) {
- ep = env.envp + env.env_len;
- env.env_len++;
- *ep++ = str;
- *ep = NULL;
- }
-}
-
-/*
- * Check the env_delete blacklist.
- * Returns TRUE if the variable was found, else false.
- */
-static int
-matches_env_delete(var)
- const char *var;
-{
- struct list_member *cur;
- size_t len;
- int iswild, match = FALSE;
-
- /* Skip anything listed in env_delete. */
- for (cur = def_env_delete; cur; cur = cur->next) {
- len = strlen(cur->value);
- /* Deal with '*' wildcard */
- if (cur->value[len - 1] == '*') {
- len--;
- iswild = TRUE;
- } else
- iswild = FALSE;
- if (strncmp(cur->value, var, len) == 0 &&
- (iswild || var[len] == '=')) {
- match = TRUE;
- break;
- }
- }
- return(match);
-}
-
-/*
- * Apply the env_check list.
- * Returns TRUE if the variable is allowed, FALSE if denied
- * or -1 if no match.
- */
-static int
-matches_env_check(var)
- const char *var;
-{
- struct list_member *cur;
- size_t len;
- int iswild, keepit = -1;
-
- for (cur = def_env_check; cur; cur = cur->next) {
- len = strlen(cur->value);
- /* Deal with '*' wildcard */
- if (cur->value[len - 1] == '*') {
- len--;
- iswild = TRUE;
- } else
- iswild = FALSE;
- if (strncmp(cur->value, var, len) == 0 &&
- (iswild || var[len] == '=')) {
- keepit = !strpbrk(var, "/%");
- break;
- }
- }
- return(keepit);
-}
-
-/*
- * Check the env_keep list.
- * Returns TRUE if the variable is allowed else FALSE.
- */
-static int
-matches_env_keep(var)
- const char *var;
-{
- struct list_member *cur;
- size_t len;
- int iswild, keepit = FALSE;
-
- for (cur = def_env_keep; cur; cur = cur->next) {
- len = strlen(cur->value);
- /* Deal with '*' wildcard */
- if (cur->value[len - 1] == '*') {
- len--;
- iswild = TRUE;
- } else
- iswild = FALSE;
- if (strncmp(cur->value, var, len) == 0 &&
- (iswild || var[len] == '=')) {
- keepit = TRUE;
- break;
- }
- }
- return(keepit);
-}
-
-/*
- * Build a new environment and ether clear potentially dangerous
- * variables from the old one or start with a clean slate.
- * Also adds sudo-specific variables (SUDO_*).
- */
-void
-rebuild_env(noexec)
- int noexec;
-{
- char **old_envp, **ep, *cp, *ps1;
- char idbuf[MAX_UID_T_LEN];
- unsigned int didvar;
- int reset_home = FALSE;
-
- /*
- * Either clean out the environment or reset to a safe default.
- */
- ps1 = NULL;
- didvar = 0;
- env.env_len = 0;
- env.env_size = 128;
- old_envp = env.envp;
- env.envp = emalloc2(env.env_size, sizeof(char *));
-#ifdef ENV_DEBUG
- memset(env.envp, 0, env.env_size * sizeof(char *));
-#endif
-
- /* Reset HOME based on target user if configured to. */
- if (ISSET(sudo_mode, MODE_RUN)) {
- if (def_always_set_home ||
- ISSET(sudo_mode, MODE_RESET_HOME | MODE_LOGIN_SHELL) ||
- (ISSET(sudo_mode, MODE_SHELL) && def_set_home))
- reset_home = TRUE;
- }
-
- if (def_env_reset || ISSET(sudo_mode, MODE_LOGIN_SHELL)) {
- /* Pull in vars we want to keep from the old environment. */
- for (ep = old_envp; *ep; ep++) {
- int keepit;
-
- /* Skip variables with values beginning with () (bash functions) */
- if ((cp = strchr(*ep, '=')) != NULL) {
- if (strncmp(cp, "=() ", 3) == 0)
- continue;
- }
-
- /*
- * First check certain variables for '%' and '/' characters.
- * If no match there, check the keep list.
- * If nothing matched, we remove it from the environment.
- */
- keepit = matches_env_check(*ep);
- if (keepit == -1)
- keepit = matches_env_keep(*ep);
-
- /* For SUDO_PS1 -> PS1 conversion. */
- if (strncmp(*ep, "SUDO_PS1=", 8) == 0)
- ps1 = *ep + 5;
-
- if (keepit) {
- /* Preserve variable. */
- switch (**ep) {
- case 'H':
- if (strncmp(*ep, "HOME=", 5) == 0)
- SET(didvar, DID_HOME);
- break;
- case 'L':
- if (strncmp(*ep, "LOGNAME=", 8) == 0)
- SET(didvar, DID_LOGNAME);
- break;
- case 'M':
- if (strncmp(*ep, "MAIL=", 5) == 0)
- SET(didvar, DID_MAIL);
- break;
- case 'P':
- if (strncmp(*ep, "PATH=", 5) == 0)
- SET(didvar, DID_PATH);
- break;
- case 'S':
- if (strncmp(*ep, "SHELL=", 6) == 0)
- SET(didvar, DID_SHELL);
- break;
- case 'T':
- if (strncmp(*ep, "TERM=", 5) == 0)
- SET(didvar, DID_TERM);
- break;
- case 'U':
- if (strncmp(*ep, "USER=", 5) == 0)
- SET(didvar, DID_USER);
- if (strncmp(*ep, "USERNAME=", 5) == 0)
- SET(didvar, DID_USERNAME);
- break;
- }
- sudo_putenv(*ep, FALSE, FALSE);
- }
- }
- didvar |= didvar << 8; /* convert DID_* to KEPT_* */
-
- /*
- * Add in defaults. In -i mode these come from the runas user,
- * otherwise they may be from the user's environment (depends
- * on sudoers options).
- */
- if (ISSET(sudo_mode, MODE_LOGIN_SHELL)) {
- sudo_setenv("SHELL", runas_pw->pw_shell, ISSET(didvar, DID_SHELL));
- sudo_setenv("LOGNAME", runas_pw->pw_name,
- ISSET(didvar, DID_LOGNAME));
- sudo_setenv("USER", runas_pw->pw_name, ISSET(didvar, DID_USER));
- sudo_setenv("USERNAME", runas_pw->pw_name,
- ISSET(didvar, DID_USERNAME));
- } else {
- if (!ISSET(didvar, DID_SHELL))
- sudo_setenv("SHELL", sudo_user.pw->pw_shell, FALSE);
- if (!ISSET(didvar, DID_LOGNAME))
- sudo_setenv("LOGNAME", user_name, FALSE);
- if (!ISSET(didvar, DID_USER))
- sudo_setenv("USER", user_name, FALSE);
- if (!ISSET(didvar, DID_USERNAME))
- sudo_setenv("USERNAME", user_name, FALSE);
- }
-
- /* If we didn't keep HOME, reset it based on target user. */
- if (!ISSET(didvar, KEPT_HOME))
- reset_home = TRUE;
-
- /*
- * Set MAIL to target user in -i mode or if MAIL is not preserved
- * from user's environment.
- */
- if (ISSET(sudo_mode, MODE_LOGIN_SHELL) || !ISSET(didvar, KEPT_MAIL)) {
- cp = _PATH_MAILDIR;
- if (cp[sizeof(_PATH_MAILDIR) - 2] == '/')
- easprintf(&cp, "MAIL=%s%s", _PATH_MAILDIR, runas_pw->pw_name);
- else
- easprintf(&cp, "MAIL=%s/%s", _PATH_MAILDIR, runas_pw->pw_name);
- sudo_putenv(cp, ISSET(didvar, DID_MAIL), TRUE);
- }
- } else {
- /*
- * Copy environ entries as long as they don't match env_delete or
- * env_check.
- */
- for (ep = old_envp; *ep; ep++) {
- int okvar;
-
- /* Skip variables with values beginning with () (bash functions) */
- if ((cp = strchr(*ep, '=')) != NULL) {
- if (strncmp(cp, "=() ", 3) == 0)
- continue;
- }
-
- /*
- * First check variables against the blacklist in env_delete.
- * If no match there check for '%' and '/' characters.
- */
- okvar = matches_env_delete(*ep) != TRUE;
- if (okvar)
- okvar = matches_env_check(*ep) != FALSE;
-
- if (okvar) {
- if (strncmp(*ep, "SUDO_PS1=", 9) == 0)
- ps1 = *ep + 5;
- else if (strncmp(*ep, "PATH=", 5) == 0)
- SET(didvar, DID_PATH);
- else if (strncmp(*ep, "TERM=", 5) == 0)
- SET(didvar, DID_TERM);
- sudo_putenv(*ep, FALSE, FALSE);
- }
- }
- }
- /* Replace the PATH envariable with a secure one? */
- if (def_secure_path && !user_is_exempt()) {
- sudo_setenv("PATH", def_secure_path, TRUE);
- SET(didvar, DID_PATH);
- }
-
- /* Set $USER, $LOGNAME and $USERNAME to target if "set_logname" is true. */
- if (def_set_logname && !ISSET(sudo_mode, MODE_LOGIN_SHELL)) {
- if (!ISSET(didvar, KEPT_LOGNAME))
- sudo_setenv("LOGNAME", runas_pw->pw_name, TRUE);
- if (!ISSET(didvar, KEPT_USER))
- sudo_setenv("USER", runas_pw->pw_name, TRUE);
- if (!ISSET(didvar, KEPT_USERNAME))
- sudo_setenv("USERNAME", runas_pw->pw_name, TRUE);
- }
-
- /* Set $HOME to target user if not preserving user's value. */
- if (reset_home)
- sudo_setenv("HOME", runas_pw->pw_dir, TRUE);
-
- /* Provide default values for $TERM and $PATH if they are not set. */
- if (!ISSET(didvar, DID_TERM))
- sudo_putenv("TERM=unknown", FALSE, FALSE);
- if (!ISSET(didvar, DID_PATH))
- sudo_setenv("PATH", _PATH_STDPATH, FALSE);
-
- /*
- * Preload a noexec file? For a list of LD_PRELOAD-alikes, see
- * http://www.fortran-2000.com/ArnaudRecipes/sharedlib.html
- * XXX - should prepend to original value, if any
- */
- if (noexec && def_noexec_file != NULL) {
-#if defined(__darwin__) || defined(__APPLE__)
- sudo_setenv("DYLD_INSERT_LIBRARIES", def_noexec_file, TRUE);
- sudo_setenv("DYLD_FORCE_FLAT_NAMESPACE", "", TRUE);
-#else
-# if defined(__osf__) || defined(__sgi)
- easprintf(&cp, "%s:DEFAULT", def_noexec_file);
- sudo_setenv("_RLD_LIST", cp, TRUE);
- efree(cp);
-# else
-# ifdef _AIX
- sudo_setenv("LDR_PRELOAD", def_noexec_file, TRUE);
-# else
- sudo_setenv("LD_PRELOAD", def_noexec_file, TRUE);
-# endif /* _AIX */
-# endif /* __osf__ || __sgi */
-#endif /* __darwin__ || __APPLE__ */
- }
-
- /* Set PS1 if SUDO_PS1 is set. */
- if (ps1 != NULL)
- sudo_putenv(ps1, TRUE, TRUE);
-
- /* Add the SUDO_COMMAND envariable (cmnd + args). */
- if (user_args) {
- easprintf(&cp, "%s %s", user_cmnd, user_args);
- sudo_setenv("SUDO_COMMAND", cp, TRUE);
- efree(cp);
- } else {
- sudo_setenv("SUDO_COMMAND", user_cmnd, TRUE);
- }
-
- /* Add the SUDO_USER, SUDO_UID, SUDO_GID environment variables. */
- sudo_setenv("SUDO_USER", user_name, TRUE);
- snprintf(idbuf, sizeof(idbuf), "%lu", (unsigned long) user_uid);
- sudo_setenv("SUDO_UID", idbuf, TRUE);
- snprintf(idbuf, sizeof(idbuf), "%lu", (unsigned long) user_gid);
- sudo_setenv("SUDO_GID", idbuf, TRUE);
-
- /* Free old environment. */
- efree(old_envp);
-}
-
-void
-insert_env_vars(env_vars)
- struct list_member *env_vars;
-{
- struct list_member *cur;
-
- /* Add user-specified environment variables. */
- for (cur = env_vars; cur != NULL; cur = cur->next)
- putenv(cur->value);
-}
-
-/*
- * Validate the list of environment variables passed in on the command
- * line against env_delete, env_check, and env_keep.
- * Calls log_error() if any specified variables are not allowed.
- */
-void
-validate_env_vars(env_vars)
- struct list_member *env_vars;
-{
- struct list_member *var;
- char *eq, *bad = NULL;
- size_t len, blen = 0, bsize = 0;
- int okvar;
-
- /* Add user-specified environment variables. */
- for (var = env_vars; var != NULL; var = var->next) {
- if (def_secure_path && !user_is_exempt() &&
- strncmp(var->value, "PATH=", 5) == 0) {
- okvar = FALSE;
- } else if (def_env_reset) {
- okvar = matches_env_check(var->value);
- if (okvar == -1)
- okvar = matches_env_keep(var->value);
- } else {
- okvar = matches_env_delete(var->value) == FALSE;
- if (okvar == FALSE)
- okvar = matches_env_check(var->value) != FALSE;
- }
- if (okvar == FALSE) {
- /* Not allowed, add to error string, allocating as needed. */
- if ((eq = strchr(var->value, '=')) != NULL)
- *eq = '\0';
- len = strlen(var->value) + 2;
- if (blen + len >= bsize) {
- do {
- bsize += 1024;
- } while (blen + len >= bsize);
- bad = erealloc(bad, bsize);
- bad[blen] = '\0';
- }
- strlcat(bad, var->value, bsize);
- strlcat(bad, ", ", bsize);
- blen += len;
- if (eq != NULL)
- *eq = '=';
- }
- }
- if (bad != NULL) {
- bad[blen - 2] = '\0'; /* remove trailing ", " */
- log_error(NO_MAIL,
- "sorry, you are not allowed to set the following environment variables: %s", bad);
- /* NOTREACHED */
- efree(bad);
- }
-}
-
-/*
- * Read in /etc/environment ala AIX and Linux.
- * Lines may be in either of three formats:
- * NAME=VALUE
- * NAME="VALUE"
- * NAME='VALUE'
- * with an optional "export" prefix so the shell can source the file.
- * Invalid lines, blank lines, or lines consisting solely of a comment
- * character are skipped.
- */
-void
-read_env_file(path, overwrite)
- const char *path;
- int overwrite;
-{
- FILE *fp;
- char *cp, *var, *val;
- size_t var_len, val_len;
-
- if ((fp = fopen(path, "r")) == NULL)
- return;
-
- while ((var = sudo_parseln(fp)) != NULL) {
- /* Skip blank or comment lines */
- if (*var == '\0')
- continue;
-
- /* Skip optional "export " */
- if (strncmp(var, "export", 6) == 0 && isspace((unsigned char) var[6])) {
- var += 7;
- while (isspace((unsigned char) *var)) {
- var++;
- }
- }
-
- /* Must be of the form name=["']value['"] */
- for (val = var; *val != '\0' && *val != '='; val++)
- ;
- if (var == val || *val != '=')
- continue;
- var_len = (size_t)(val - var);
- val_len = strlen(++val);
-
- /* Strip leading and trailing single/double quotes */
- if ((val[0] == '\'' || val[0] == '\"') && val[0] == val[val_len - 1]) {
- val[val_len - 1] = '\0';
- val++;
- val_len -= 2;
- }
-
- cp = emalloc(var_len + 1 + val_len + 1);
- memcpy(cp, var, var_len + 1); /* includes '=' */
- memcpy(cp + var_len + 1, val, val_len + 1); /* includes NUL */
-
- sudo_putenv(cp, TRUE, overwrite);
- }
- fclose(fp);
-}
-
-void
-init_envtables()
-{
- struct list_member *cur;
- const char **p;
-
- /* Fill in the "env_delete" list. */
- for (p = initial_badenv_table; *p; p++) {
- cur = emalloc(sizeof(struct list_member));
- cur->value = estrdup(*p);
- cur->next = def_env_delete;
- def_env_delete = cur;
- }
-
- /* Fill in the "env_check" list. */
- for (p = initial_checkenv_table; *p; p++) {
- cur = emalloc(sizeof(struct list_member));
- cur->value = estrdup(*p);
- cur->next = def_env_check;
- def_env_check = cur;
- }
-
- /* Fill in the "env_keep" list. */
- for (p = initial_keepenv_table; *p; p++) {
- cur = emalloc(sizeof(struct list_member));
- cur->value = estrdup(*p);
- cur->next = def_env_keep;
- def_env_keep = cur;
- }
-}
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