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start_stop_daemon: add -chuid support

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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
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20
coreutils/chown.c
View File

@ -56,7 +56,6 @@ static int fileAction(const char *fileName, struct stat *statbuf,
int chown_main(int argc, char **argv);
int chown_main(int argc, char **argv)
{
char *groupName;
int retval = EXIT_SUCCESS;
opt_complementary = "-2";
@ -65,24 +64,7 @@ int chown_main(int argc, char **argv)
if (OPT_NODEREF) chown_func = lchown;
/* First, check if there is a group name here */
groupName = strchr(*argv, '.'); /* deprecated? */
if (!groupName)
groupName = strchr(*argv, ':');
else
*groupName = ':'; /* replace '.' with ':' */
/* First, try parsing "user[:[group]]" */
if (!groupName) { /* "user" */
ugid.uid = get_ug_id(*argv, xuname2uid);
} else if (groupName == *argv) { /* ":group" */
ugid.gid = get_ug_id(groupName + 1, xgroup2gid);
} else {
if (!groupName[1]) /* "user:" */
*groupName = '\0';
if (!get_uidgid(&ugid, *argv, 1))
bb_error_msg_and_die("unknown user/group %s", *argv);
}
parse_chown_usergroup_or_die(&ugid, argv[0]);
/* Ok, ready to do the deed now */
argv++;

51
debianutils/start_stop_daemon.c
View File

@ -14,12 +14,11 @@
static int signal_nr = 15;
static int user_id = -1;
static int quiet;
static char *userspec;
static char *chuid;
static char *cmdname;
static char *execname;
static char *pidfile;
static smallint quiet;
struct pid_list {
struct pid_list *next;
@ -222,20 +221,28 @@ static const struct option long_options[] = {
enum {
CTX_STOP = 0x1,
CTX_START = 0x2,
OPT_BACKGROUND = 0x4,
OPT_QUIET = 0x8,
OPT_MAKEPID = 0x10,
OPT_OKNODO = 0x20 * ENABLE_FEATURE_START_STOP_DAEMON_FANCY,
OPT_VERBOSE = 0x40 * ENABLE_FEATURE_START_STOP_DAEMON_FANCY,
OPT_NICELEVEL = 0x80 * ENABLE_FEATURE_START_STOP_DAEMON_FANCY,
OPT_BACKGROUND = 0x4, // -b
OPT_QUIET = 0x8, // -q
OPT_MAKEPID = 0x10, // -m
OPT_a = 0x20, // -a
OPT_n = 0x40, // -n
OPT_s = 0x80, // -s
OPT_u = 0x100, // -u
OPT_c = 0x200, // -c
OPT_x = 0x400, // -x
OPT_p = 0x800, // -p
OPT_OKNODO = 0x1000 * ENABLE_FEATURE_START_STOP_DAEMON_FANCY, // -o
OPT_VERBOSE = 0x2000 * ENABLE_FEATURE_START_STOP_DAEMON_FANCY, // -v
OPT_NICELEVEL = 0x4000 * ENABLE_FEATURE_START_STOP_DAEMON_FANCY, // -N
};
int start_stop_daemon_main(int argc, char **argv);
int start_stop_daemon_main(int argc, char **argv)
{
unsigned opt;
char *signame = NULL;
char *startas = NULL;
char *signame;
char *startas;
char *chuid;
#if ENABLE_FEATURE_START_STOP_DAEMON_FANCY
// char *retry_arg = NULL;
// int retries = -1;
@ -247,22 +254,22 @@ int start_stop_daemon_main(int argc, char **argv)
/* Check required one context option was given */
opt_complementary = "K:S:?:K--S:S--K:m?p:K?xpun:S?xa";
opt = getopt32(argc, argv, "KSbqm"
// USE_FEATURE_START_STOP_DAEMON_FANCY("ovN:R:")
USE_FEATURE_START_STOP_DAEMON_FANCY("ovN:")
"a:n:s:u:c:x:p:"
opt = getopt32(argc, argv, "KSbqma:n:s:u:c:x:p:"
USE_FEATURE_START_STOP_DAEMON_FANCY("ovN:"),
// USE_FEATURE_START_STOP_DAEMON_FANCY("ovN:R:"),
&startas, &cmdname, &signame, &userspec, &chuid, &execname, &pidfile
USE_FEATURE_START_STOP_DAEMON_FANCY(,&opt_N)
// USE_FEATURE_START_STOP_DAEMON_FANCY(,&retry_arg)
,&startas, &cmdname, &signame, &userspec, &chuid, &execname, &pidfile);
);
quiet = (opt & OPT_QUIET) && !(opt & OPT_VERBOSE);
if (signame) {
if (opt & OPT_s) {
signal_nr = get_signum(signame);
if (signal_nr < 0) bb_show_usage();
}
if (!startas)
if (!(opt & OPT_a))
startas = execname;
// USE_FEATURE_START_STOP_DAEMON_FANCY(
@ -303,11 +310,11 @@ int start_stop_daemon_main(int argc, char **argv)
fprintf(pidf, "%d\n", pidt);
fclose(pidf);
}
if (chuid) {
user_id = bb_strtou(chuid, NULL, 10);
if (errno)
user_id = xuname2uid(chuid);
xsetuid(user_id);
if (opt & OPT_c) {
struct bb_uidgid_t ugid;
parse_chown_usergroup_or_die(&ugid, chuid);
if (ugid.gid != (gid_t) -1) xsetgid(ugid.gid);
if (ugid.uid != (uid_t) -1) xsetuid(ugid.uid);
}
#if ENABLE_FEATURE_START_STOP_DAEMON_FANCY
if (opt & OPT_NICELEVEL) {

3
include/libbb.h
View File

@ -443,7 +443,10 @@ struct bb_uidgid_t {
uid_t uid;
gid_t gid;
};
/* always sets uid and gid */
int get_uidgid(struct bb_uidgid_t*, const char*, int numeric_ok);
/* chown-like handling of "user[:[group]" */
void parse_chown_usergroup_or_die(struct bb_uidgid_t *u, char *user_group);
/* what is this? */
/*extern char *bb_getug(char *buffer, char *idname, long id, int bufsize, char prefix);*/
char *bb_getpwuid(char *name, long uid, int bufsize);

2
include/usage.h
View File

@ -2893,7 +2893,7 @@
"\n -N|--nicelevel <N> Add N to process's nice level" \
) \
"\n -s|--signal <signal> Signal to send (default TERM)" \
"\n -U|--chuid <username>|<uid> Start process with this name"
"\n -c|--chuid <user>[:[<group>]] Change to specified user/group"
#define stat_trivial_usage \
"[OPTION] FILE..."

36
libpwdgrp/uidgid_get.c
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()