start_stop_daemon: add -chuid support

This commit is contained in:
Denis Vlasenko
2007-02-26 22:47:42 +00:00
parent f8ea0f3a66
commit cce38586ae
5 changed files with 70 additions and 42 deletions

View File

@@ -27,6 +27,7 @@ ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#include "busybox.h"
/* Always sets uid and gid */
int get_uidgid(struct bb_uidgid_t *u, const char *ug, int numeric_ok)
{
struct passwd *pwd;
@@ -53,6 +54,7 @@ int get_uidgid(struct bb_uidgid_t *u, const char *ug, int numeric_ok)
goto skip;
}
}
/* Either it is not numeric, or caller disallows numeric username */
pwd = getpwnam(user);
if (!pwd)
return 0;
@@ -75,6 +77,40 @@ int get_uidgid(struct bb_uidgid_t *u, const char *ug, int numeric_ok)
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()