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Port over the last of the tinylogin applets

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-Erik
This commit is contained in:
Eric Andersen
2002-06-23 04:24:25 +00:00
parent 0fbff134f4
commit 27f64e1f4e
26 changed files with 1722 additions and 258 deletions
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10
libbb/Makefile.in
View File

@@ -34,17 +34,21 @@ LIBBB_SRC:= \
my_getpwuid.c parse_mode.c parse_number.c perror_msg.c perror_msg_and_die.c \
print_file.c process_escape_sequence.c read_package_field.c recursive_action.c \
safe_read.c safe_strncpy.c syscalls.c syslog_msg_with_name.c time_string.c \
trim.c unzip.c uncompress.c vdprintf.c verror_msg.c vperror_msg.c wfopen.c xfuncs.c \
trim.c unzip.c uncompress.c vdprintf.c verror_msg.c vperror_msg.c wfopen.c \
xgetcwd.c xreadlink.c xregcomp.c interface.c remove_file.c last_char_is.c \
copyfd.c vherror_msg.c herror_msg.c herror_msg_and_die.c xgethostbyname.c \
dirname.c make_directory.c create_icmp_socket.c u_signal_names.c arith.c \
simplify_path.c inet_common.c inode_hash.c
simplify_path.c inet_common.c inode_hash.c obscure.c pwd2spwd.c xfuncs.c \
correct_password.c change_identity.c setup_environment.c run_shell.c \
pw_encrypt.c restricted_shell.c
LIBBB_OBJS=$(patsubst %.c,$(LIBBB_DIR)%.o, $(LIBBB_SRC))
LIBBB_MSRC:=$(LIBBB_DIR)messages.c
LIBBB_MOBJ:=full_version.o name_too_long.o omitting_directory.o not_a_directory.o \
memory_exhausted.o invalid_date.o invalid_option.o io_error.o dash_dash_help.o \
write_error.o too_few_args.o name_longer_than_foo.o unknown.o can_not_create_raw_socket.o
write_error.o too_few_args.o name_longer_than_foo.o unknown.o can_not_create_raw_socket.o \
shadow_file.o passwd_file.o group_file.o gshadow_file.o nologin_file.o securetty_file.o \
motd_file.o
LIBBB_MOBJS=$(patsubst %,$(LIBBB_DIR)%, $(LIBBB_MOBJ))
libraries-y+=$(LIBBB_DIR)$(LIBBB_AR)

54
libbb/change_identity.c Normal file
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@@ -0,0 +1,54 @@
/* vi: set sw=4 ts=4: */
/*
* Copyright 1989 - 1991, Julianne Frances Haugh <jockgrrl@austin.rr.com>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of Julianne F. Haugh nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY JULIE HAUGH AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL JULIE HAUGH OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <stdio.h>
#include <errno.h>
#include <unistd.h>
#include <string.h>
#include <stdlib.h>
#include <syslog.h>
#include <ctype.h>
#include "libbb.h"
/* Become the user and group(s) specified by PW. */
void change_identity ( const struct passwd *pw )
{
if ( initgroups ( pw-> pw_name, pw-> pw_gid ) == -1 )
perror_msg_and_die ( "cannot set groups" );
endgrent ( );
if ( setgid ( pw-> pw_gid ))
perror_msg_and_die ( "cannot set group id" );
if ( setuid ( pw->pw_uid ))
perror_msg_and_die ( "cannot set user id" );
}

78
libbb/correct_password.c Normal file
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@@ -0,0 +1,78 @@
/* vi: set sw=4 ts=4: */
/*
* Copyright 1989 - 1991, Julianne Frances Haugh <jockgrrl@austin.rr.com>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of Julianne F. Haugh nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY JULIE HAUGH AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL JULIE HAUGH OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <stdio.h>
#include <errno.h>
#include <unistd.h>
#include <string.h>
#include <stdlib.h>
#include <syslog.h>
#include <ctype.h>
#include <crypt.h>
#include "libbb.h"
/* Ask the user for a password.
Return 1 if the user gives the correct password for entry PW,
0 if not. Return 1 without asking for a password if run by UID 0
or if PW has an empty password. */
int correct_password ( const struct passwd *pw )
{
char *unencrypted, *encrypted, *correct;
#ifdef CONFIG_FEATURE_SHADOWPASSWDS
if (( strcmp ( pw-> pw_passwd, "x" ) == 0 ) || ( strcmp ( pw-> pw_passwd, "*" ) == 0 )) {
struct spwd *sp = getspnam ( pw-> pw_name );
if ( !sp )
error_msg_and_die ( "no valid shadow password" );
correct = sp-> sp_pwdp;
}
else
#endif
correct = pw-> pw_passwd;
if ( correct == 0 || correct[0] == '\0' )
return 1;
unencrypted = getpass ( "Password: " );
if ( !unencrypted )
{
fputs ( "getpass: cannot open /dev/tty\n", stderr );
return 0;
}
encrypted = crypt ( unencrypted, correct );
memset ( unencrypted, 0, xstrlen ( unencrypted ));
return ( strcmp ( encrypted, correct ) == 0 ) ? 1 : 0;
}

18
libbb/libc5.c
View File

@@ -11,6 +11,24 @@
#if __GNU_LIBRARY__ < 5
/*
* Some systems already have updwtmp(). Some don't... This is
* the updwtmp() implementation from uClibc, Copyright 2002 by
* Erik Andersen <andersee@debian.org>
*/
extern void updwtmp(const char *wtmp_file, const struct utmp *lutmp)
{
int fd;
fd = open(wtmp_file, O_APPEND | O_WRONLY, 0);
if (fd >= 0) {
if (lockf(fd, F_LOCK, 0)==0) {
write(fd, (const char *) lutmp, sizeof(struct utmp));
lockf(fd, F_ULOCK, 0);
close(fd);
}
}
}
/* Copyright (C) 1991 Free Software Foundation, Inc.
This file is part of the GNU C Library.

36
libbb/messages.c
View File

@@ -66,3 +66,39 @@
#ifdef L_can_not_create_raw_socket
const char * const can_not_create_raw_socket = "can`t create raw socket";
#endif
#ifdef L_passwd_file
#define PASSWD_FILE "/etc/passwd"
const char * const passwd_file = PASSWD_FILE;
#endif
#ifdef L_shadow_file
#define SHADOW_FILE "/etc/shadow"
const char * const shadow_file = SHADOW_FILE;
#endif
#ifdef L_group_file
#define GROUP_FILE "/etc/group"
const char * const group_file = GROUP_FILE;
#endif
#ifdef L_gshadow_file
#define GSHADOW_FILE "/etc/gshadow"
const char * const gshadow_file = GSHADOW_FILE;
#endif
#ifdef L_nologin_file
#define NOLOGIN_FILE "/etc/nologin"
const char * const nologin_file = NOLOGIN_FILE;
#endif
#ifdef L_securetty_file
#define SECURETTY_FILE "/etc/securetty"
const char * const securetty_file = SECURETTY_FILE;
#endif
#ifdef L_motd_file
#define MOTD_FILE "/etc/motd"
const char * const motd_file = MOTD_FILE;
#endif

246
libbb/obscure.c Normal file
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@@ -0,0 +1,246 @@
/* vi: set sw=4 ts=4: */
/*
* Copyright 1989 - 1994, Julianne Frances Haugh <jockgrrl@austin.rr.com>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of Julianne F. Haugh nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY JULIE HAUGH AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL JULIE HAUGH OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/*
* This version of obscure.c contains modifications to support "cracklib"
* by Alec Muffet (alec.muffett@uk.sun.com). You must obtain the Cracklib
* library source code for this function to operate.
*/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <ctype.h>
#include "libbb.h"
/*
* can't be a palindrome - like `R A D A R' or `M A D A M'
*/
static int palindrome(const char *old, const char *newval)
{
int i, j;
i = strlen(newval);
for (j = 0; j < i; j++)
if (newval[i - j - 1] != newval[j])
return 0;
return 1;
}
/*
* more than half of the characters are different ones.
*/
static int similiar(const char *old, const char *newval)
{
int i, j;
for (i = j = 0; newval[i] && old[i]; i++)
if (strchr(newval, old[i]))
j++;
if (i >= j * 2)
return 0;
return 1;
}
/*
* a nice mix of characters.
*/
static int simple(const char *old, const char *newval)
{
int digits = 0;
int uppers = 0;
int lowers = 0;
int others = 0;
int size;
int i;
for (i = 0; newval[i]; i++) {
if (isdigit(newval[i]))
digits++;
else if (isupper(newval[i]))
uppers++;
else if (islower(newval[i]))
lowers++;
else
others++;
}
/*
* The scam is this - a password of only one character type
* must be 8 letters long. Two types, 7, and so on.
*/
size = 9;
if (digits)
size--;
if (uppers)
size--;
if (lowers)
size--;
if (others)
size--;
if (size <= i)
return 0;
return 1;
}
static char *str_lower(char *string)
{
char *cp;
for (cp = string; *cp; cp++)
*cp = tolower(*cp);
return string;
}
static char *password_check(const char *old, const char *newval, const struct passwd *pwdp)
{
char *msg = NULL;
char *oldmono, *newmono, *wrapped;
if (strcmp(newval, old) == 0)
return "no change";
newmono = str_lower(xstrdup(newval));
oldmono = str_lower(xstrdup(old));
wrapped = (char *) xmalloc(strlen(oldmono) * 2 + 1);
strcpy(wrapped, oldmono);
strcat(wrapped, oldmono);
if (palindrome(oldmono, newmono))
msg = "a palindrome";
if (!msg && strcmp(oldmono, newmono) == 0)
msg = "case changes only";
if (!msg && similiar(oldmono, newmono))
msg = "too similiar";
if (!msg && simple(old, newval))
msg = "too simple";
if (!msg && strstr(wrapped, newmono))
msg = "rotated";
bzero(newmono, strlen(newmono));
bzero(oldmono, strlen(oldmono));
bzero(wrapped, strlen(wrapped));
free(newmono);
free(oldmono);
free(wrapped);
return msg;
}
static char *obscure_msg(const char *old, const char *newval, const struct passwd *pwdp)
{
int maxlen, oldlen, newlen;
char *new1, *old1, *msg;
oldlen = strlen(old);
newlen = strlen(newval);
#if 0 /* why not check the password when set for the first time? --marekm */
if (old[0] == '\0')
/* return (1); */
return NULL;
#endif
if (newlen < 5)
return "too short";
/*
* Remaining checks are optional.
*/
/* Not for us -- Sean
*if (!getdef_bool("OBSCURE_CHECKS_ENAB"))
* return NULL;
*/
msg = password_check(old, newval, pwdp);
if (msg)
return msg;
/* The traditional crypt() truncates passwords to 8 chars. It is
possible to circumvent the above checks by choosing an easy
8-char password and adding some random characters to it...
Example: "password$%^&*123". So check it again, this time
truncated to the maximum length. Idea from npasswd. --marekm */
maxlen = 8;
if (oldlen <= maxlen && newlen <= maxlen)
return NULL;
new1 = (char *) xstrdup(newval);
old1 = (char *) xstrdup(old);
if (newlen > maxlen)
new1[maxlen] = '\0';
if (oldlen > maxlen)
old1[maxlen] = '\0';
msg = password_check(old1, new1, pwdp);
bzero(new1, newlen);
bzero(old1, oldlen);
free(new1);
free(old1);
return msg;
}
/*
* Obscure - see if password is obscure enough.
*
* The programmer is encouraged to add as much complexity to this
* routine as desired. Included are some of my favorite ways to
* check passwords.
*/
extern int obscure(const char *old, const char *newval, const struct passwd *pwdp)
{
char *msg = obscure_msg(old, newval, pwdp);
/* if (msg) { */
if (msg != NULL) {
printf("Bad password: %s.\n", msg);
/* return 0; */
return 1;
}
/* return 1; */
return 0;
}

48
libbb/pw_encrypt.c Normal file
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@@ -0,0 +1,48 @@
/* vi: set sw=4 ts=4: */
/*
* Utility routine.
*
* Copyright (C) 1999-2002 by Erik Andersen <andersee@debian.org>
*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include <string.h>
#include <crypt.h>
#include "libbb.h"
extern char *pw_encrypt(const char *clear, const char *salt)
{
static char cipher[128];
char *cp;
#ifdef CONFIG_FEATURE_SHA1_PASSWORDS
if (strncmp(salt, "$2$", 3) == 0) {
return sha1_crypt(clear);
}
#endif
cp = (char *) crypt(clear, salt);
/* if crypt (a nonstandard crypt) returns a string too large,
truncate it so we don't overrun buffers and hope there is
enough security in what's left */
if (strlen(cp) > sizeof(cipher)-1) {
cp[sizeof(cipher)-1] = 0;
}
strcpy(cipher, cp);
return cipher;
}

73
libbb/pwd2spwd.c Normal file
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@@ -0,0 +1,73 @@
/* vi: set sw=4 ts=4: */
/*
* Copyright 1989 - 1994, Julianne Frances Haugh <jockgrrl@austin.rr.com>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of Julianne F. Haugh nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY JULIE HAUGH AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL JULIE HAUGH OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <time.h>
#include <sys/types.h>
#include "libbb.h"
/*
* pwd_to_spwd - create entries for new spwd structure
*
* pwd_to_spwd() creates a new (struct spwd) containing the
* information in the pointed-to (struct passwd).
*/
#define DAY (24L*3600L)
#define WEEK (7*DAY)
#define SCALE DAY
struct spwd *pwd_to_spwd(const struct passwd *pw)
{
static struct spwd sp;
/*
* Nice, easy parts first. The name and passwd map directly
* from the old password structure to the new one.
*/
sp.sp_namp = pw->pw_name;
sp.sp_pwdp = pw->pw_passwd;
/*
* Defaults used if there is no pw_age information.
*/
sp.sp_min = 0;
sp.sp_max = (10000L * DAY) / SCALE;
sp.sp_lstchg = time((time_t *) 0) / SCALE;
/*
* These fields have no corresponding information in the password
* file. They are set to uninitialized values.
*/
sp.sp_warn = -1;
sp.sp_expire = -1;
sp.sp_inact = -1;
sp.sp_flag = -1;
return &sp;
}

57
libbb/restricted_shell.c Normal file
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@@ -0,0 +1,57 @@
/* vi: set sw=4 ts=4: */
/*
* Copyright 1989 - 1991, Julianne Frances Haugh <jockgrrl@austin.rr.com>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of Julianne F. Haugh nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY JULIE HAUGH AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL JULIE HAUGH OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <stdio.h>
#include <errno.h>
#include <unistd.h>
#include <string.h>
#include <stdlib.h>
#include <syslog.h>
#include <ctype.h>
#include "libbb.h"
/* Return 1 if SHELL is a restricted shell (one not returned by
getusershell), else 0, meaning it is a standard shell. */
int restricted_shell ( const char *shell )
{
char *line;
setusershell ( );
while (( line = getusershell ( ))) {
if (( *line != '#' ) && ( strcmp ( line, shell ) == 0 ))
break;
}
endusershell ( );
return line ? 0 : 1;
}

81
libbb/run_shell.c Normal file
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@@ -0,0 +1,81 @@
/* vi: set sw=4 ts=4: */
/*
* Copyright 1989 - 1991, Julianne Frances Haugh <jockgrrl@austin.rr.com>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of Julianne F. Haugh nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY JULIE HAUGH AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL JULIE HAUGH OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <stdio.h>
#include <errno.h>
#include <unistd.h>
#include <string.h>
#include <stdlib.h>
#include <syslog.h>
#include <ctype.h>
#include "libbb.h"
/* Run SHELL, or DEFAULT_SHELL if SHELL is empty.
If COMMAND is nonzero, pass it to the shell with the -c option.
If ADDITIONAL_ARGS is nonzero, pass it to the shell as more
arguments. */
void run_shell ( const char *shell, int loginshell, const char *command, const char **additional_args )
{
const char **args;
int argno = 1;
int additional_args_cnt = 0;
for ( args = additional_args; args && *args; args++ )
additional_args_cnt++;
if ( additional_args )
args = (const char **) xmalloc (sizeof (char *) * ( 4 + additional_args_cnt ));
else
args = (const char **) xmalloc (sizeof (char *) * 4 );
args [0] = get_last_path_component ( xstrdup ( shell ));
if ( loginshell ) {
char *args0 = xmalloc ( xstrlen ( args [0] ) + 2 );
args0 [0] = '-';
strcpy ( args0 + 1, args [0] );
args [0] = args0;
}
if ( command ) {
args [argno++] = "-c";
args [argno++] = command;
}
if ( additional_args ) {
for ( ; *additional_args; ++additional_args )
args [argno++] = *additional_args;
}
args [argno] = 0;
execv ( shell, (char **) args );
perror_msg_and_die ( "cannot run %s", shell );
}

93
libbb/setup_environment.c Normal file
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@@ -0,0 +1,93 @@
/* vi: set sw=4 ts=4: */
/*
* Copyright 1989 - 1991, Julianne Frances Haugh <jockgrrl@austin.rr.com>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of Julianne F. Haugh nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY JULIE HAUGH AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL JULIE HAUGH OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <stdio.h>
#include <errno.h>
#include <unistd.h>
#include <string.h>
#include <stdlib.h>
#include <syslog.h>
#include <ctype.h>
#include "libbb.h"
#define DEFAULT_LOGIN_PATH "/bin:/usr/bin"
#define DEFAULT_ROOT_LOGIN_PATH "/usr/sbin:/bin:/usr/bin:/sbin"
static void xsetenv ( const char *key, const char *value )
{
if ( setenv ( key, value, 1 ))
error_msg_and_die ( "out of memory" );
}
void setup_environment ( const char *shell, int loginshell, int changeenv, const struct passwd *pw )
{
if ( loginshell ) {
char *term;
/* Change the current working directory to be the home directory
* of the user. It is a fatal error for this process to be unable
* to change to that directory. There is no "default" home
* directory.
* Some systems default to HOME=/
*/
if ( chdir ( pw-> pw_dir )) {
if ( chdir ( "/" )) {
syslog ( LOG_WARNING, "unable to cd to %s' for user %s'\n", pw-> pw_dir, pw-> pw_name );
error_msg_and_die ( "cannot cd to home directory or /" );
}
fputs ( "warning: cannot change to home directory\n", stderr );
}
/* Leave TERM unchanged. Set HOME, SHELL, USER, LOGNAME, PATH.
Unset all other environment variables. */
term = getenv ("TERM");
clearenv ( );
if ( term )
xsetenv ( "TERM", term );
xsetenv ( "HOME", pw-> pw_dir );
xsetenv ( "SHELL", shell );
xsetenv ( "USER", pw-> pw_name );
xsetenv ( "LOGNAME", pw-> pw_name );
xsetenv ( "PATH", ( pw-> pw_uid ? DEFAULT_LOGIN_PATH : DEFAULT_ROOT_LOGIN_PATH ));
}
else if ( changeenv ) {
/* Set HOME, SHELL, and if not becoming a super-user,
USER and LOGNAME. */
xsetenv ( "HOME", pw-> pw_dir );
xsetenv ( "SHELL", shell );
if ( pw-> pw_uid ) {
xsetenv ( "USER", pw-> pw_name );
xsetenv ( "LOGNAME", pw-> pw_name );
}
}
}