375 lines
8.7 KiB
C
375 lines
8.7 KiB
C
/*
|
|
* Copyright (c) 1987, 1993, 1994, 1995
|
|
* The Regents of the University of California. 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. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the University of
|
|
* California, Berkeley and its contributors.
|
|
* 4. Neither the name of the University 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 THE REGENTS 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 THE REGENTS 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.
|
|
*/
|
|
|
|
#if defined(LIBC_SCCS) && !defined(lint)
|
|
static char rcsid[] = "$NetBSD: passwd.c,v 1.4 1997/04/23 18:51:17 mycroft Exp $";
|
|
#endif /* LIBC_SCCS and not lint */
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/stat.h>
|
|
#include <sys/time.h>
|
|
#include <sys/resource.h>
|
|
#include <sys/wait.h>
|
|
|
|
#include <ctype.h>
|
|
#include <fcntl.h>
|
|
#include <unistd.h>
|
|
#include <stdlib.h>
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <pwd.h>
|
|
#include <errno.h>
|
|
#include <paths.h>
|
|
#include <signal.h>
|
|
#include <limits.h>
|
|
#include <util.h>
|
|
|
|
static void pw_cont __P((int sig));
|
|
|
|
int
|
|
pw_lock(retries)
|
|
int retries;
|
|
{
|
|
int i, fd;
|
|
mode_t old_mode;
|
|
|
|
/* Acquire the lock file. */
|
|
old_mode = umask(0);
|
|
fd = open(_PATH_MASTERPASSWD_LOCK, O_WRONLY|O_CREAT|O_EXCL, 0600);
|
|
for (i = 0; i < retries && fd < 0 && errno == EEXIST; i++) {
|
|
sleep(1);
|
|
fd = open(_PATH_MASTERPASSWD_LOCK, O_WRONLY|O_CREAT|O_EXCL,
|
|
0600);
|
|
}
|
|
umask(old_mode);
|
|
return(fd);
|
|
}
|
|
|
|
int
|
|
pw_mkdb()
|
|
{
|
|
int pstat;
|
|
pid_t pid;
|
|
|
|
pid = vfork();
|
|
if (pid == 0) {
|
|
execl(_PATH_PWD_MKDB, "pwd_mkdb", "-p",
|
|
_PATH_MASTERPASSWD_LOCK, NULL);
|
|
exit(1);
|
|
}
|
|
pid = waitpid(pid, &pstat, 0);
|
|
if (pid == -1 || !WIFEXITED(pstat) || WEXITSTATUS(pstat) != 0)
|
|
return(-1);
|
|
return(0);
|
|
}
|
|
|
|
int
|
|
pw_abort()
|
|
{
|
|
return(unlink(_PATH_MASTERPASSWD_LOCK));
|
|
}
|
|
|
|
/* Everything below this point is intended for the convenience of programs
|
|
* which allow a user to interactively edit the passwd file. Errors in the
|
|
* routines below will cause the process to abort. */
|
|
|
|
static pid_t editpid = -1;
|
|
|
|
static void
|
|
pw_cont(sig)
|
|
int sig;
|
|
{
|
|
|
|
if (editpid != -1)
|
|
kill(editpid, sig);
|
|
}
|
|
|
|
void
|
|
pw_init()
|
|
{
|
|
struct rlimit rlim;
|
|
|
|
/* Unlimited resource limits. */
|
|
rlim.rlim_cur = rlim.rlim_max = RLIM_INFINITY;
|
|
(void)setrlimit(RLIMIT_CPU, &rlim);
|
|
(void)setrlimit(RLIMIT_FSIZE, &rlim);
|
|
(void)setrlimit(RLIMIT_STACK, &rlim);
|
|
(void)setrlimit(RLIMIT_DATA, &rlim);
|
|
(void)setrlimit(RLIMIT_RSS, &rlim);
|
|
|
|
/* Don't drop core (not really necessary, but GP's). */
|
|
rlim.rlim_cur = rlim.rlim_max = 0;
|
|
(void)setrlimit(RLIMIT_CORE, &rlim);
|
|
|
|
/* Turn off signals. */
|
|
(void)signal(SIGALRM, SIG_IGN);
|
|
(void)signal(SIGHUP, SIG_IGN);
|
|
(void)signal(SIGINT, SIG_IGN);
|
|
(void)signal(SIGPIPE, SIG_IGN);
|
|
(void)signal(SIGQUIT, SIG_IGN);
|
|
(void)signal(SIGTERM, SIG_IGN);
|
|
(void)signal(SIGCONT, pw_cont);
|
|
}
|
|
|
|
void
|
|
pw_edit(notsetuid, filename)
|
|
int notsetuid;
|
|
const char *filename;
|
|
{
|
|
int i, j, xargc, pstat;
|
|
char *p, *editor;
|
|
char **xargv;
|
|
|
|
if (filename == NULL)
|
|
filename = _PATH_MASTERPASSWD_LOCK;
|
|
if ((editor = getenv("EDITOR")) == NULL)
|
|
editor = strdup(_PATH_VI);
|
|
else
|
|
editor = strdup(editor);
|
|
if (p = strrchr(editor, '/'))
|
|
++p;
|
|
else
|
|
p = editor;
|
|
|
|
/* Scan editor string, count spaces, allocate arg vector. */
|
|
for (i = 0, xargc = 0; p[i] != '\0'; i++) {
|
|
if (isspace(p[i])) {
|
|
while (isspace(p[i++]))
|
|
/* skip white space */ ;
|
|
if (p[i] == '\0')
|
|
break;
|
|
xargc++;
|
|
}
|
|
}
|
|
|
|
/* argv[0] + <xargc args> + filename + NULL */
|
|
xargv = (char **)malloc(sizeof(char *) * (xargc + 3));
|
|
if (xargv == NULL)
|
|
pw_error("malloc failed", 1, 1);
|
|
|
|
i = 0;
|
|
xargv[i++] = p;
|
|
for (; *p != '\0'; p++) {
|
|
if (isspace(*p)) {
|
|
while(isspace(*p))
|
|
*p++ = '\0'; /* blast whitespace */
|
|
if (*p == '\0')
|
|
break;
|
|
xargv[i++] = p;
|
|
}
|
|
}
|
|
|
|
xargv[i++] = (char *)filename;
|
|
xargv[i] = NULL;
|
|
|
|
if (!(editpid = vfork())) {
|
|
if (notsetuid) {
|
|
setgid(getgid());
|
|
setuid(getuid());
|
|
}
|
|
execvp(editor, xargv);
|
|
_exit(1);
|
|
}
|
|
for (;;) {
|
|
editpid = waitpid(editpid, (int *)&pstat, WUNTRACED);
|
|
if (editpid == -1)
|
|
pw_error(editor, 1, 1);
|
|
else if (WIFSTOPPED(pstat))
|
|
raise(WSTOPSIG(pstat));
|
|
else if (WIFEXITED(pstat) && WEXITSTATUS(pstat) == 0)
|
|
break;
|
|
else
|
|
pw_error(editor, 1, 1);
|
|
}
|
|
editpid = -1;
|
|
free(editor);
|
|
free(xargv);
|
|
}
|
|
|
|
void
|
|
pw_prompt()
|
|
{
|
|
int c;
|
|
|
|
(void)printf("re-edit the password file? [y]: ");
|
|
(void)fflush(stdout);
|
|
c = getchar();
|
|
if (c != EOF && c != '\n')
|
|
while (getchar() != '\n');
|
|
if (c == 'n')
|
|
pw_error(NULL, 0, 0);
|
|
}
|
|
|
|
void
|
|
pw_copy(ffd, tfd, pw)
|
|
int ffd, tfd;
|
|
struct passwd *pw;
|
|
{
|
|
FILE *from, *to;
|
|
int done;
|
|
char *p, buf[8192];
|
|
|
|
if (!(from = fdopen(ffd, "r")))
|
|
pw_error(_PATH_MASTERPASSWD, 1, 1);
|
|
if (!(to = fdopen(tfd, "w")))
|
|
pw_error(_PATH_MASTERPASSWD_LOCK, 1, 1);
|
|
|
|
for (done = 0; fgets(buf, sizeof(buf), from);) {
|
|
if (!strchr(buf, '\n')) {
|
|
warnx("%s: line too long", _PATH_MASTERPASSWD);
|
|
pw_error(NULL, 0, 1);
|
|
}
|
|
if (done) {
|
|
(void)fprintf(to, "%s", buf);
|
|
if (ferror(to))
|
|
goto err;
|
|
continue;
|
|
}
|
|
if (!(p = strchr(buf, ':'))) {
|
|
warnx("%s: corrupted entry", _PATH_MASTERPASSWD);
|
|
pw_error(NULL, 0, 1);
|
|
}
|
|
*p = '\0';
|
|
if (strcmp(buf, pw->pw_name)) {
|
|
*p = ':';
|
|
(void)fprintf(to, "%s", buf);
|
|
if (ferror(to))
|
|
goto err;
|
|
continue;
|
|
}
|
|
(void)fprintf(to, "%s:%s:%d:%d:%s:%ld:%ld:%s:%s:%s\n",
|
|
pw->pw_name, pw->pw_passwd, pw->pw_uid, pw->pw_gid,
|
|
pw->pw_class, pw->pw_change, pw->pw_expire, pw->pw_gecos,
|
|
pw->pw_dir, pw->pw_shell);
|
|
done = 1;
|
|
if (ferror(to))
|
|
goto err;
|
|
}
|
|
if (!done)
|
|
(void)fprintf(to, "%s:%s:%d:%d:%s:%ld:%ld:%s:%s:%s\n",
|
|
pw->pw_name, pw->pw_passwd, pw->pw_uid, pw->pw_gid,
|
|
pw->pw_class, pw->pw_change, pw->pw_expire, pw->pw_gecos,
|
|
pw->pw_dir, pw->pw_shell);
|
|
|
|
if (ferror(to))
|
|
err: pw_error(NULL, 1, 1);
|
|
(void)fclose(to);
|
|
}
|
|
|
|
int
|
|
pw_scan(bp, pw, flags)
|
|
char *bp;
|
|
struct passwd *pw;
|
|
int *flags;
|
|
{
|
|
long id;
|
|
int root;
|
|
char *p, *sh;
|
|
|
|
if (flags != (int *)NULL)
|
|
*flags = 0;
|
|
|
|
if (!(pw->pw_name = strsep(&bp, ":"))) /* login */
|
|
goto fmt;
|
|
root = !strcmp(pw->pw_name, "root");
|
|
|
|
if (!(pw->pw_passwd = strsep(&bp, ":"))) /* passwd */
|
|
goto fmt;
|
|
|
|
if (!(p = strsep(&bp, ":"))) /* uid */
|
|
goto fmt;
|
|
id = atol(p);
|
|
if (root && id) {
|
|
warnx("root uid should be 0");
|
|
return (0);
|
|
}
|
|
pw->pw_uid = id;
|
|
if ((*p == '\0') && (flags != (int *)NULL))
|
|
*flags |= _PASSWORD_NOUID;
|
|
|
|
if (!(p = strsep(&bp, ":"))) /* gid */
|
|
goto fmt;
|
|
id = atol(p);
|
|
pw->pw_gid = id;
|
|
if ((*p == '\0') && (flags != (int *)NULL))
|
|
*flags |= _PASSWORD_NOGID;
|
|
|
|
pw->pw_class = strsep(&bp, ":"); /* class */
|
|
if (!(p = strsep(&bp, ":"))) /* change */
|
|
goto fmt;
|
|
pw->pw_change = atol(p);
|
|
if ((*p == '\0') && (flags != (int *)NULL))
|
|
*flags |= _PASSWORD_NOCHG;
|
|
if (!(p = strsep(&bp, ":"))) /* expire */
|
|
goto fmt;
|
|
pw->pw_expire = atol(p);
|
|
if ((*p == '\0') && (flags != (int *)NULL))
|
|
*flags |= _PASSWORD_NOEXP;
|
|
pw->pw_gecos = strsep(&bp, ":"); /* gecos */
|
|
pw->pw_dir = strsep(&bp, ":"); /* directory */
|
|
if (!(pw->pw_shell = strsep(&bp, ":"))) /* shell */
|
|
goto fmt;
|
|
|
|
p = pw->pw_shell;
|
|
if (root && *p) /* empty == /bin/sh */
|
|
for (setusershell();;) {
|
|
if (!(sh = getusershell())) {
|
|
warnx("warning, unknown root shell");
|
|
break;
|
|
}
|
|
if (!strcmp(p, sh))
|
|
break;
|
|
}
|
|
|
|
if (p = strsep(&bp, ":")) { /* too many */
|
|
fmt: warnx("corrupted entry");
|
|
return (0);
|
|
}
|
|
|
|
return (1);
|
|
}
|
|
|
|
void
|
|
pw_error(name, err, eval)
|
|
const char *name;
|
|
int err, eval;
|
|
{
|
|
if (err)
|
|
warn(name);
|
|
|
|
warnx("%s: unchanged", _PATH_MASTERPASSWD);
|
|
pw_abort();
|
|
exit(eval);
|
|
}
|
|
|