start_stop_daemon: add -chuid support
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@@ -27,6 +27,7 @@ ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#include "busybox.h"
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/* Always sets uid and gid */
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int get_uidgid(struct bb_uidgid_t *u, const char *ug, int numeric_ok)
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{
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struct passwd *pwd;
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@@ -53,6 +54,7 @@ int get_uidgid(struct bb_uidgid_t *u, const char *ug, int numeric_ok)
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goto skip;
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}
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}
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/* Either it is not numeric, or caller disallows numeric username */
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pwd = getpwnam(user);
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if (!pwd)
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return 0;
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@@ -75,6 +77,40 @@ int get_uidgid(struct bb_uidgid_t *u, const char *ug, int numeric_ok)
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return 1;
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}
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/* chown-like:
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* "user" sets uid only,
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* ":group" sets gid only
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* "user:" sets uid and gid (to user's primary group id)
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* "user:group" sets uid and gid
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* ('unset' uid or gid is actually set to -1)
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*/
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void parse_chown_usergroup_or_die(struct bb_uidgid_t *u, char *user_group)
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{
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char *group;
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u->uid = -1;
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u->gid = -1;
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/* Check if there is a group name */
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group = strchr(user_group, '.'); /* deprecated? */
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if (!group)
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group = strchr(user_group, ':');
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else
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*group = ':'; /* replace '.' with ':' */
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/* Parse "user[:[group]]" */
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if (!group) { /* "user" */
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u->uid = get_ug_id(user_group, xuname2uid);
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} else if (group == user_group) { /* ":group" */
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u->gid = get_ug_id(group + 1, xgroup2gid);
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} else {
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if (!group[1]) /* "user:" */
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*group = '\0';
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if (!get_uidgid(u, user_group, 1))
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bb_error_msg_and_die("unknown user/group %s", user_group);
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}
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}
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#if 0
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#include <stdio.h>
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int main()
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