mirror of
https://github.com/topjohnwu/ndk-busybox.git
synced 2024-12-15 07:48:30 +00:00
134 lines
3.7 KiB
C
134 lines
3.7 KiB
C
/*
|
|
Copyright (c) 2001-2006, Gerrit Pape
|
|
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. The name of the author may not be used to endorse or promote products
|
|
derived from this software without specific prior written permission.
|
|
|
|
THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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 "libbb.h"
|
|
|
|
/* Always sets uid and gid */
|
|
int get_uidgid(struct bb_uidgid_t *u, const char *ug, int numeric_ok)
|
|
{
|
|
struct passwd *pwd;
|
|
struct group *gr;
|
|
char *user, *group;
|
|
unsigned n;
|
|
|
|
user = (char*)ug;
|
|
group = strchr(ug, ':');
|
|
if (group) {
|
|
int sz = (++group) - ug;
|
|
user = alloca(sz);
|
|
/* copies sz-1 bytes, stores terminating '\0' */
|
|
safe_strncpy(user, ug, sz);
|
|
}
|
|
if (numeric_ok) {
|
|
n = bb_strtou(user, NULL, 10);
|
|
if (!errno) {
|
|
u->uid = n;
|
|
pwd = getpwuid(n);
|
|
/* If we have e.g. "500" string without user */
|
|
/* with uid 500 in /etc/passwd, we set gid == uid */
|
|
u->gid = pwd ? pwd->pw_gid : n;
|
|
goto skip;
|
|
}
|
|
}
|
|
/* Either it is not numeric, or caller disallows numeric username */
|
|
pwd = getpwnam(user);
|
|
if (!pwd)
|
|
return 0;
|
|
u->uid = pwd->pw_uid;
|
|
u->gid = pwd->pw_gid;
|
|
|
|
skip:
|
|
if (group) {
|
|
if (numeric_ok) {
|
|
n = bb_strtou(group, NULL, 10);
|
|
if (!errno) {
|
|
u->gid = n;
|
|
return 1;
|
|
}
|
|
}
|
|
gr = getgrnam(group);
|
|
if (!gr) return 0;
|
|
u->gid = gr->gr_gid;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
/* chown-like:
|
|
* "user" sets uid only,
|
|
* ":group" sets gid only
|
|
* "user:" sets uid and gid (to user's primary group id)
|
|
* "user:group" sets uid and gid
|
|
* ('unset' uid or gid is actually set to -1)
|
|
*/
|
|
void parse_chown_usergroup_or_die(struct bb_uidgid_t *u, char *user_group)
|
|
{
|
|
char *group;
|
|
|
|
u->uid = -1;
|
|
u->gid = -1;
|
|
|
|
/* Check if there is a group name */
|
|
group = strchr(user_group, '.'); /* deprecated? */
|
|
if (!group)
|
|
group = strchr(user_group, ':');
|
|
else
|
|
*group = ':'; /* replace '.' with ':' */
|
|
|
|
/* Parse "user[:[group]]" */
|
|
if (!group) { /* "user" */
|
|
u->uid = get_ug_id(user_group, xuname2uid);
|
|
} else if (group == user_group) { /* ":group" */
|
|
u->gid = get_ug_id(group + 1, xgroup2gid);
|
|
} else {
|
|
if (!group[1]) /* "user:" */
|
|
*group = '\0';
|
|
if (!get_uidgid(u, user_group, 1))
|
|
bb_error_msg_and_die("unknown user/group %s", user_group);
|
|
}
|
|
}
|
|
|
|
#if 0
|
|
#include <stdio.h>
|
|
int main()
|
|
{
|
|
unsigned u;
|
|
struct bb_uidgid_t ug;
|
|
u = get_uidgid(&ug, "apache", 0);
|
|
printf("%u = %u:%u\n", u, ug.uid, ug.gid);
|
|
ug.uid = ug.gid = 1111;
|
|
u = get_uidgid(&ug, "apache", 0);
|
|
printf("%u = %u:%u\n", u, ug.uid, ug.gid);
|
|
ug.uid = ug.gid = 1111;
|
|
u = get_uidgid(&ug, "apache:users", 0);
|
|
printf("%u = %u:%u\n", u, ug.uid, ug.gid);
|
|
ug.uid = ug.gid = 1111;
|
|
u = get_uidgid(&ug, "apache:users", 0);
|
|
printf("%u = %u:%u\n", u, ug.uid, ug.gid);
|
|
return 0;
|
|
}
|
|
#endif
|