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- implement id -G (Tito Ragusa)

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This commit is contained in:
Bernhard Reutner-Fischer 2008-09-12 09:58:11 +00:00
parent 70de57f60a
commit 0ee1cb0084
2 changed files with 38 additions and 10 deletions
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47
coreutils/id.c
View File

@ -7,10 +7,11 @@
* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
*/
/* BB_AUDIT SUSv3 _NOT_ compliant -- option -G is not currently supported. */
/* BB_AUDIT SUSv3 compliant. */
/* Hacked by Tito Ragusa (C) 2004 to handle usernames of whatever length and to
* be more similar to GNU id.
* -Z option support: by Yuichi Nakamura <ynakam@hitachisoft.jp>
* Added -G option Tito Ragusa (C) 2008 for SUSv3.
*/
#include "libbb.h"
@ -19,17 +20,18 @@
#define NAME_NOT_NUMBER 2
#define JUST_USER 4
#define JUST_GROUP 8
#define JUST_ALL_GROUPS 16
#if ENABLE_SELINUX
#define JUST_CONTEXT 16
#define JUST_CONTEXT 32
#endif
static int printf_full(unsigned int id, const char *arg, const char prefix)
static int printf_full(unsigned int id, const char *arg, const char *prefix)
{
const char *fmt = "%cid=%u";
const char *fmt = "%s%u";
int status = EXIT_FAILURE;
if (arg) {
fmt = "%cid=%u(%s)";
fmt = "%s%u(%s)";
status = EXIT_SUCCESS;
}
printf(fmt, prefix, id, arg);
@ -42,6 +44,8 @@ int id_main(int argc UNUSED_PARAM, char **argv)
struct passwd *p;
uid_t uid;
gid_t gid;
gid_t *groups;
int grp;
unsigned long flags;
short status;
#if ENABLE_SELINUX
@ -49,8 +53,8 @@ int id_main(int argc UNUSED_PARAM, char **argv)
#endif
/* Don't allow -n -r -nr -ug -rug -nug -rnug */
/* Don't allow more than one username */
opt_complementary = "?1:u--g:g--u:r?ug:n?ug" USE_SELINUX(":u--Z:Z--u:g--Z:Z--g");
flags = getopt32(argv, "rnug" USE_SELINUX("Z"));
opt_complementary = "?1:u--g:g--u:G--u:u--G:g--G:G--g:r?ugG:n?ugG" USE_SELINUX(":u--Z:Z--u:g--Z:Z--g");
flags = getopt32(argv, "rnugG" USE_SELINUX("Z"));
/* This values could be overwritten later */
uid = geteuid();
@ -68,6 +72,22 @@ int id_main(int argc UNUSED_PARAM, char **argv)
/* in this case PRINT_REAL is the same */
}
grp = getgroups(0, 0);
groups = (gid_t *)xmalloc(sizeof(gid_t) * grp);
getgroups(grp, (gid_t *)groups);
if (flags & (JUST_ALL_GROUPS)) {
while (grp--) {
if (flags & NAME_NOT_NUMBER)
printf("%s", bb_getgrgid(NULL, 0, *groups++));
else
printf("%d", *groups++);
bb_putchar((grp > 0) ? ' ' : '\n');
}
/* exit */
fflush_stdout_and_exit(EXIT_SUCCESS);
}
if (flags & (JUST_GROUP | JUST_USER USE_SELINUX(| JUST_CONTEXT))) {
/* JUST_GROUP and JUST_USER are mutually exclusive */
if (flags & NAME_NOT_NUMBER) {
@ -101,10 +121,17 @@ int id_main(int argc UNUSED_PARAM, char **argv)
/* Print full info like GNU id */
/* bb_getpwuid(0) doesn't exit on failure (returns NULL) */
status = printf_full(uid, bb_getpwuid(NULL, 0, uid), 'u');
status = printf_full(uid, bb_getpwuid(NULL, 0, uid), "uid=");
bb_putchar(' ');
status |= printf_full(gid, bb_getgrgid(NULL, 0, gid), 'g');
status |= printf_full(gid, bb_getgrgid(NULL, 0, gid), "gid=");
printf(" groups=");
while (grp--) {
status |= printf_full(*groups, bb_getgrgid(NULL, 0, *groups), "");
if (grp > 0)
bb_putchar(',');
groups++;
}
/* Don't free groups */
#if ENABLE_SELINUX
if (is_selinux_enabled()) {
security_context_t mysid;

1
include/usage.h
View File

@ -1602,6 +1602,7 @@
USE_SELINUX( \
"\n -Z Print the security context" \
) \
"\n -G Print all group IDs" \
"\n -g Print group ID" \
"\n -u Print user ID" \
"\n -n Print name instead of a number" \