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/*-
* Copyright (c) 1990, 1993, 1994
* 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.
*/
#ifndef lint
static const char sccsid[] = "@(#)pw_copy.c 8.4 (Berkeley) 4/2/94";
#endif /* not lint */
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
/*
* This module is used to copy the master password file, replacing a single
* record, by chpass(1) and passwd(1).
*/
#include <err.h>
#include <pwd.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#if 0
#include <pw_scan.h>
#endif
extern int pw_big_ids_warning;
extern int pw_scan(char *, struct passwd *);
#include <pw_util.h>
extern char *tempname;
/* for use in pw_copy(). Compare a pw entry to a pw struct. */
static int
pw_equal(char *buf, struct passwd *pw)
{
struct passwd buf_pw;
int len;
len = strlen (buf);
if (buf[len-1] == '\n')
buf[len-1] = '\0';
return (strcmp(pw->pw_name, buf_pw.pw_name) == 0
&& pw->pw_uid == buf_pw.pw_uid
&& pw->pw_gid == buf_pw.pw_gid
&& strcmp(pw->pw_class, buf_pw.pw_class) == 0
&& (long)pw->pw_change == (long)buf_pw.pw_change
&& (long)pw->pw_expire == (long)buf_pw.pw_expire
&& strcmp(pw->pw_gecos, buf_pw.pw_gecos) == 0
&& strcmp(pw->pw_dir, buf_pw.pw_dir) == 0
&& strcmp(pw->pw_shell, buf_pw.pw_shell) == 0);
}
void
pw_copy(int ffd, int tfd, struct passwd *pw, struct passwd *old_pw)
{
FILE *from, *to;
int done;
char *p, buf[8192];
char uidstr[20];
char gidstr[20];
char chgstr[20];
char expstr[20];
snprintf(uidstr, sizeof(uidstr), "%lu", (unsigned long)pw->pw_uid);
snprintf(gidstr, sizeof(gidstr), "%lu", (unsigned long)pw->pw_gid);
snprintf(chgstr, sizeof(chgstr), "%ld", (long)pw->pw_change);
snprintf(expstr, sizeof(expstr), "%ld", (long)pw->pw_expire);
if (!(from = fdopen(ffd, "r")))
pw_error(_PATH_MASTERPASSWD, 1, 1);
if (!(to = fdopen(tfd, "w")))
pw_error(tempname, 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;
}
for (p = buf; *p != '\n'; p++)
if (*p != ' ' && *p != '\t')
break;
if (*p == '#' || *p == '\n') {
(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;
}
*p = ':';
if (old_pw && !pw_equal(buf, old_pw)) {
warnx("%s: entry for %s has changed",
_PATH_MASTERPASSWD, pw->pw_name);
pw_error(NULL, 0, 1);
}
(void)fprintf(to, "%s:%s:%s:%s:%s:%s:%s:%s:%s:%s\n",
pw->pw_name, pw->pw_passwd,
pw->pw_fields & _PWF_UID ? uidstr : "",
pw->pw_fields & _PWF_GID ? gidstr : "",
pw->pw_class,
pw->pw_fields & _PWF_CHANGE ? chgstr : "",
pw->pw_fields & _PWF_EXPIRE ? expstr : "",
pw->pw_gecos, pw->pw_dir, pw->pw_shell);
done = 1;
if (ferror(to))
goto err;
}
if (!done) {
#ifdef YP
/* Ultra paranoid: shouldn't happen. */
if (getuid()) {
warnx("%s: not found in %s -- permission denied",
pw->pw_name, _PATH_MASTERPASSWD);
pw_error(NULL, 0, 1);
} else
#endif /* YP */
(void)fprintf(to, "%s:%s:%s:%s:%s:%s:%s:%s:%s:%s\n",
pw->pw_name, pw->pw_passwd,
pw->pw_fields & _PWF_UID ? uidstr : "",
pw->pw_fields & _PWF_GID ? gidstr : "",
pw->pw_class,
pw->pw_fields & _PWF_CHANGE ? chgstr : "",
pw->pw_fields & _PWF_EXPIRE ? expstr : "",
pw->pw_gecos, pw->pw_dir, pw->pw_shell);
}
if (ferror(to))
err: pw_error(NULL, 1, 1);
(void)fclose(to);
}
#include <sys/param.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <pwd.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
/*
* Some software assumes that IDs are short. We should emit warnings
* for id's which can not be stored in a short, but we are more liberal
* by default, warning for IDs greater than USHRT_MAX.
*
* If pw_big_ids_warning is anything other than -1 on entry to pw_scan()
* it will be set based on the existence of PW_SCAN_BIG_IDS in the
* environment.
*/
int pw_big_ids_warning = -1;
int
pw_scan(bp, pw)
char *bp;
struct passwd *pw;
{
uid_t id;
int root;
char *p, *sh;
if (pw_big_ids_warning == -1)
pw_big_ids_warning = getenv("PW_SCAN_BIG_IDS") == NULL ? 1 : 0;
pw->pw_fields = 0;
if (!(pw->pw_name = strsep(&bp, ":"))) /* login */
goto fmt;
root = !strcmp(pw->pw_name, "root");
if(pw->pw_name[0] && (pw->pw_name[0] != '+' || pw->pw_name[1] == '\0'))
pw->pw_fields |= _PWF_NAME;
if (!(pw->pw_passwd = strsep(&bp, ":"))) /* passwd */
goto fmt;
if(pw->pw_passwd[0]) pw->pw_fields |= _PWF_PASSWD;
if (!(p = strsep(&bp, ":"))) /* uid */
goto fmt;
if (p[0])
pw->pw_fields |= _PWF_UID;
else {
if (pw->pw_name[0] != '+' && pw->pw_name[0] != '-') {
warnx("no uid for user %s", pw->pw_name);
return (0);
}
}
id = strtoul(p, (char **)NULL, 10);
if (errno == ERANGE) {
warnx("%s > max uid value (%lu)", p, ULONG_MAX);
return (0);
}
if (root && id) {
warnx("root uid should be 0");
return (0);
}
if (pw_big_ids_warning && id > USHRT_MAX) {
warnx("%s > recommended max uid value (%u)", p, USHRT_MAX);
/*return (0);*/ /* THIS SHOULD NOT BE FATAL! */
}
pw->pw_uid = id;
if (!(p = strsep(&bp, ":"))) /* gid */
goto fmt;
if(p[0]) pw->pw_fields |= _PWF_GID;
id = strtoul(p, (char **)NULL, 10);
if (errno == ERANGE) {
warnx("%s > max gid value (%u)", p, ULONG_MAX);
return (0);
}
if (pw_big_ids_warning && id > USHRT_MAX) {
warnx("%s > recommended max gid value (%u)", p, USHRT_MAX);
/* return (0); This should not be fatal! */
}
pw->pw_gid = id;
pw->pw_class = strsep(&bp, ":"); /* class */
if(pw->pw_class[0]) pw->pw_fields |= _PWF_CLASS;
if (!(p = strsep(&bp, ":"))) /* change */
goto fmt;
if(p[0]) pw->pw_fields |= _PWF_CHANGE;
pw->pw_change = atol(p);
if (!(p = strsep(&bp, ":"))) /* expire */
goto fmt;
if(p[0]) pw->pw_fields |= _PWF_EXPIRE;
pw->pw_expire = atol(p);
if (!(pw->pw_gecos = strsep(&bp, ":"))) /* gecos */
goto fmt;
if(pw->pw_gecos[0]) pw->pw_fields |= _PWF_GECOS;
if (!(pw->pw_dir = strsep(&bp, ":"))) /* directory */
goto fmt;
if(pw->pw_dir[0]) pw->pw_fields |= _PWF_DIR;
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[0]) pw->pw_fields |= _PWF_SHELL;
if ((p = strsep(&bp, ":"))) { /* too many */
fmt: warnx("corrupted entry");
return (0);
}
return (1);
}
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