/*-
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
* Copyright (c) 1990, 1993, 1994
* The Regents of the University of California. All rights reserved.
*
* 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
+ * 3. 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.
*
* SUCH DAMAGE.
*/
-#ifndef lint
-static char sccsid[] = "@(#)pw_scan.c 8.3 (Berkeley) 4/2/94";
-#endif /* not lint */
+#include <sys/cdefs.h>
+__SCCSID("@(#)pw_scan.c 8.3 (Berkeley) 4/2/94");
+__FBSDID("$FreeBSD$");
/*
* This module is used to "verify" password entries by chpass(1) and
#include <sys/param.h>
#include <err.h>
-#include <fcntl.h>
-#include <pwd.h>
#include <errno.h>
-#include <stdio.h>
+#include <pwd.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include "pw_scan.h"
+/*
+ * Some software assumes that IDs are short. We should emit warnings
+ * for id's which cannot 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 -1 on entry to pw_scan(), it will be set based
+ * on the existence of PW_SCAN_BIG_IDS in the environment.
+ *
+ * It is believed all baseline system software that can not handle the
+ * normal ID sizes is now gone so pw_big_ids_warning is disabled for now.
+ * But the code has been left in place in case end-users want to re-enable
+ * it and/or for the next time the ID sizes get bigger but pieces of the
+ * system lag behind.
+ */
+static int pw_big_ids_warning = 0;
+
int
-pw_scan(bp, pw)
- char *bp;
- struct passwd *pw;
+__pw_scan(char *bp, struct passwd *pw, int flags)
{
- long id;
+ uid_t id;
int root;
- char *p, *sh;
+ char *ep, *p, *sh;
+ unsigned long temp;
+
+ 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'))
+ 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 (pw->pw_passwd[0])
+ pw->pw_fields |= _PWF_PASSWD;
if (!(p = strsep(&bp, ":"))) /* uid */
goto fmt;
- if(p[0]) pw->pw_fields |= _PWF_UID;
- id = atol(p);
- if (root && id) {
- warnx("root uid should be 0");
+ if (p[0])
+ pw->pw_fields |= _PWF_UID;
+ else {
+ if (pw->pw_name[0] != '+' && pw->pw_name[0] != '-') {
+ if (flags & _PWSCAN_WARN)
+ warnx("no uid for user %s", pw->pw_name);
+ return (0);
+ }
+ }
+ errno = 0;
+ temp = strtoul(p, &ep, 10);
+ if ((temp == ULONG_MAX && errno == ERANGE) || temp > UID_MAX) {
+ if (flags & _PWSCAN_WARN)
+ warnx("%s > max uid value (%u)", p, UID_MAX);
return (0);
}
- if (id > USHRT_MAX) {
- warnx("%s > max uid value (%d)", p, USHRT_MAX);
+ id = temp;
+ if (*ep != '\0') {
+ if (flags & _PWSCAN_WARN)
+ warnx("%s uid is incorrect", p);
return (0);
}
+ if (root && id) {
+ if (flags & _PWSCAN_WARN)
+ warnx("root uid should be 0");
+ return (0);
+ }
+ if (flags & _PWSCAN_WARN && 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 = atol(p);
- if (id > USHRT_MAX) {
- warnx("%s > max gid value (%d)", p, USHRT_MAX);
+ if (p[0])
+ pw->pw_fields |= _PWF_GID;
+ else {
+ if (pw->pw_name[0] != '+' && pw->pw_name[0] != '-') {
+ if (flags & _PWSCAN_WARN)
+ warnx("no gid for user %s", pw->pw_name);
+ return (0);
+ }
+ }
+ errno = 0;
+ temp = strtoul(p, &ep, 10);
+ if ((temp == ULONG_MAX && errno == ERANGE) || temp > GID_MAX) {
+ if (flags & _PWSCAN_WARN)
+ warnx("%s > max gid value (%u)", p, GID_MAX);
return (0);
}
+ id = temp;
+ if (*ep != '\0') {
+ if (flags & _PWSCAN_WARN)
+ warnx("%s gid is incorrect", p);
+ return (0);
+ }
+ if (flags & _PWSCAN_WARN && 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 (flags & _PWSCAN_MASTER ) {
+ if (!(pw->pw_class = strsep(&bp, ":"))) /* class */
+ goto fmt;
+ 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);
+ } else
+ pw->pw_class = NULL;
if (!(pw->pw_gecos = strsep(&bp, ":"))) /* gecos */
goto fmt;
- if(pw->pw_gecos[0]) pw->pw_fields |= _PWF_GECOS;
+ if (pw->pw_gecos[0])
+ pw->pw_fields |= _PWF_GECOS;
- if (!(pw->pw_dir = strsep(&bp, ":"))) /* directory */
+ if (!(pw->pw_dir = strsep(&bp, ":"))) /* directory */
goto fmt;
- if(pw->pw_dir[0]) pw->pw_fields |= _PWF_DIR;
+ 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 */
+ if (root && *p) { /* empty == /bin/sh */
for (setusershell();;) {
if (!(sh = getusershell())) {
- warnx("warning, unknown root shell");
+ if (flags & _PWSCAN_WARN)
+ warnx("warning, unknown root shell");
break;
}
if (!strcmp(p, sh))
break;
}
- if(p[0]) pw->pw_fields |= _PWF_SHELL;
+ endusershell();
+ }
+ if (p[0])
+ pw->pw_fields |= _PWF_SHELL;
- if (p = strsep(&bp, ":")) { /* too many */
-fmt: warnx("corrupted entry");
+ if ((p = strsep(&bp, ":"))) { /* too many */
+fmt:
+ if (flags & _PWSCAN_WARN)
+ warnx("corrupted entry");
return (0);
}
return (1);
git.ckatri.com / pw-darwin.git / blobdiff