mirror of
https://github.com/sheumann/hush.git
synced 2024-11-05 06:07:00 +00:00
114 lines
2.5 KiB
C
114 lines
2.5 KiB
C
/* vi: set sw=4 ts=4: */
|
|
/*
|
|
* addgroup - add users to /etc/passwd and /etc/shadow
|
|
*
|
|
* Copyright (C) 1999 by Lineo, inc. and John Beppu
|
|
* Copyright (C) 1999,2000,2001 by John Beppu <beppu@codepoet.org>
|
|
*
|
|
* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
|
|
*
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <sys/types.h>
|
|
#include <unistd.h>
|
|
|
|
#include "busybox.h"
|
|
|
|
/* make sure gr_name isn't taken, make sure gid is kosher
|
|
* return 1 on failure */
|
|
static int group_study(struct group *g)
|
|
{
|
|
FILE *etc_group;
|
|
gid_t desired;
|
|
|
|
struct group *grp;
|
|
const int max = 65000;
|
|
|
|
etc_group = bb_xfopen(bb_path_group_file, "r");
|
|
|
|
/* make sure gr_name isn't taken, make sure gid is kosher */
|
|
desired = g->gr_gid;
|
|
while ((grp = fgetgrent(etc_group))) {
|
|
if ((strcmp(grp->gr_name, g->gr_name)) == 0) {
|
|
bb_error_msg_and_die("%s: group already in use", g->gr_name);
|
|
}
|
|
if ((desired) && grp->gr_gid == desired) {
|
|
bb_error_msg_and_die("%d: gid already in use",
|
|
desired);
|
|
}
|
|
if ((grp->gr_gid > g->gr_gid) && (grp->gr_gid < max)) {
|
|
g->gr_gid = grp->gr_gid;
|
|
}
|
|
}
|
|
fclose(etc_group);
|
|
|
|
/* gid */
|
|
if (desired) {
|
|
g->gr_gid = desired;
|
|
} else {
|
|
g->gr_gid++;
|
|
}
|
|
/* return 1; */
|
|
return 0;
|
|
}
|
|
|
|
/* append a new user to the passwd file */
|
|
static int addgroup(char *group, gid_t gid, const char *user)
|
|
{
|
|
FILE *file;
|
|
struct group gr;
|
|
|
|
/* make sure gid and group haven't already been allocated */
|
|
gr.gr_gid = gid;
|
|
gr.gr_name = group;
|
|
if (group_study(&gr))
|
|
return 1;
|
|
|
|
/* add entry to group */
|
|
file = bb_xfopen(bb_path_group_file, "a");
|
|
/* group:passwd:gid:userlist */
|
|
fprintf(file, "%s:%s:%d:%s\n", group, "x", gr.gr_gid, user);
|
|
fclose(file);
|
|
|
|
#if ENABLE_FEATURE_SHADOWPASSWDS
|
|
file = bb_xfopen(bb_path_gshadow_file, "a");
|
|
fprintf(file, "%s:!::\n", group);
|
|
fclose(file);
|
|
#endif
|
|
|
|
/* return 1; */
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* addgroup will take a login_name as its first parameter.
|
|
*
|
|
* gid
|
|
*
|
|
* can be customized via command-line parameters.
|
|
* ________________________________________________________________________ */
|
|
int addgroup_main(int argc, char **argv)
|
|
{
|
|
char *group;
|
|
gid_t gid = 0;
|
|
|
|
/* check for min, max and missing args and exit on error */
|
|
bb_opt_complementally = "-1:?2:?";
|
|
|
|
if (bb_getopt_ulflags(argc, argv, "g:", &group)) {
|
|
gid = bb_xgetlarg(group, 10, 0, LONG_MAX);
|
|
}
|
|
/* move past the commandline options */
|
|
argv += optind;
|
|
|
|
/* need to be root */
|
|
if(geteuid()) {
|
|
bb_error_msg_and_die(bb_msg_perm_denied_are_you_root);
|
|
}
|
|
|
|
/* werk */
|
|
return addgroup(argv[0], gid, (argv[1]) ? argv[1] : "");
|
|
}
|