start_stop_daemon: add -chuid support
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@ -56,7 +56,6 @@ static int fileAction(const char *fileName, struct stat *statbuf,
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int chown_main(int argc, char **argv);
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int chown_main(int argc, char **argv)
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{
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char *groupName;
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int retval = EXIT_SUCCESS;
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opt_complementary = "-2";
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@ -65,24 +64,7 @@ int chown_main(int argc, char **argv)
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if (OPT_NODEREF) chown_func = lchown;
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/* First, check if there is a group name here */
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groupName = strchr(*argv, '.'); /* deprecated? */
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if (!groupName)
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groupName = strchr(*argv, ':');
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else
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*groupName = ':'; /* replace '.' with ':' */
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/* First, try parsing "user[:[group]]" */
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if (!groupName) { /* "user" */
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ugid.uid = get_ug_id(*argv, xuname2uid);
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} else if (groupName == *argv) { /* ":group" */
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ugid.gid = get_ug_id(groupName + 1, xgroup2gid);
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} else {
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if (!groupName[1]) /* "user:" */
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*groupName = '\0';
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if (!get_uidgid(&ugid, *argv, 1))
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bb_error_msg_and_die("unknown user/group %s", *argv);
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}
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parse_chown_usergroup_or_die(&ugid, argv[0]);
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/* Ok, ready to do the deed now */
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argv++;
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@ -14,12 +14,11 @@
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static int signal_nr = 15;
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static int user_id = -1;
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static int quiet;
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static char *userspec;
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static char *chuid;
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static char *cmdname;
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static char *execname;
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static char *pidfile;
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static smallint quiet;
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struct pid_list {
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struct pid_list *next;
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@ -222,20 +221,28 @@ static const struct option long_options[] = {
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enum {
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CTX_STOP = 0x1,
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CTX_START = 0x2,
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OPT_BACKGROUND = 0x4,
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OPT_QUIET = 0x8,
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OPT_MAKEPID = 0x10,
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OPT_OKNODO = 0x20 * ENABLE_FEATURE_START_STOP_DAEMON_FANCY,
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OPT_VERBOSE = 0x40 * ENABLE_FEATURE_START_STOP_DAEMON_FANCY,
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OPT_NICELEVEL = 0x80 * ENABLE_FEATURE_START_STOP_DAEMON_FANCY,
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OPT_BACKGROUND = 0x4, // -b
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OPT_QUIET = 0x8, // -q
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OPT_MAKEPID = 0x10, // -m
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OPT_a = 0x20, // -a
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OPT_n = 0x40, // -n
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OPT_s = 0x80, // -s
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OPT_u = 0x100, // -u
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OPT_c = 0x200, // -c
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OPT_x = 0x400, // -x
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OPT_p = 0x800, // -p
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OPT_OKNODO = 0x1000 * ENABLE_FEATURE_START_STOP_DAEMON_FANCY, // -o
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OPT_VERBOSE = 0x2000 * ENABLE_FEATURE_START_STOP_DAEMON_FANCY, // -v
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OPT_NICELEVEL = 0x4000 * ENABLE_FEATURE_START_STOP_DAEMON_FANCY, // -N
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};
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int start_stop_daemon_main(int argc, char **argv);
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int start_stop_daemon_main(int argc, char **argv)
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{
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unsigned opt;
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char *signame = NULL;
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char *startas = NULL;
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char *signame;
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char *startas;
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char *chuid;
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#if ENABLE_FEATURE_START_STOP_DAEMON_FANCY
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// char *retry_arg = NULL;
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// int retries = -1;
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@ -247,22 +254,22 @@ int start_stop_daemon_main(int argc, char **argv)
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/* Check required one context option was given */
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opt_complementary = "K:S:?:K--S:S--K:m?p:K?xpun:S?xa";
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opt = getopt32(argc, argv, "KSbqm"
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// USE_FEATURE_START_STOP_DAEMON_FANCY("ovN:R:")
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USE_FEATURE_START_STOP_DAEMON_FANCY("ovN:")
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"a:n:s:u:c:x:p:"
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opt = getopt32(argc, argv, "KSbqma:n:s:u:c:x:p:"
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USE_FEATURE_START_STOP_DAEMON_FANCY("ovN:"),
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// USE_FEATURE_START_STOP_DAEMON_FANCY("ovN:R:"),
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&startas, &cmdname, &signame, &userspec, &chuid, &execname, &pidfile
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USE_FEATURE_START_STOP_DAEMON_FANCY(,&opt_N)
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// USE_FEATURE_START_STOP_DAEMON_FANCY(,&retry_arg)
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,&startas, &cmdname, &signame, &userspec, &chuid, &execname, &pidfile);
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);
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quiet = (opt & OPT_QUIET) && !(opt & OPT_VERBOSE);
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if (signame) {
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if (opt & OPT_s) {
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signal_nr = get_signum(signame);
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if (signal_nr < 0) bb_show_usage();
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}
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if (!startas)
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if (!(opt & OPT_a))
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startas = execname;
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// USE_FEATURE_START_STOP_DAEMON_FANCY(
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@ -303,11 +310,11 @@ int start_stop_daemon_main(int argc, char **argv)
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fprintf(pidf, "%d\n", pidt);
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fclose(pidf);
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}
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if (chuid) {
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user_id = bb_strtou(chuid, NULL, 10);
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if (errno)
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user_id = xuname2uid(chuid);
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xsetuid(user_id);
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if (opt & OPT_c) {
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struct bb_uidgid_t ugid;
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parse_chown_usergroup_or_die(&ugid, chuid);
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if (ugid.gid != (gid_t) -1) xsetgid(ugid.gid);
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if (ugid.uid != (uid_t) -1) xsetuid(ugid.uid);
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}
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#if ENABLE_FEATURE_START_STOP_DAEMON_FANCY
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if (opt & OPT_NICELEVEL) {
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@ -443,7 +443,10 @@ struct bb_uidgid_t {
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uid_t uid;
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gid_t gid;
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};
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/* always sets uid and gid */
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int get_uidgid(struct bb_uidgid_t*, const char*, int numeric_ok);
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/* chown-like handling of "user[:[group]" */
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void parse_chown_usergroup_or_die(struct bb_uidgid_t *u, char *user_group);
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/* what is this? */
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/*extern char *bb_getug(char *buffer, char *idname, long id, int bufsize, char prefix);*/
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char *bb_getpwuid(char *name, long uid, int bufsize);
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@ -2893,7 +2893,7 @@
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"\n -N|--nicelevel <N> Add N to process's nice level" \
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) \
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"\n -s|--signal <signal> Signal to send (default TERM)" \
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"\n -U|--chuid <username>|<uid> Start process with this name"
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"\n -c|--chuid <user>[:[<group>]] Change to specified user/group"
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#define stat_trivial_usage \
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"[OPTION] FILE..."
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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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