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- /* groupadd.c - create a new group
- *
- * Copyright 2013 Ashwini Kumar <ak.ashwini@gmail.com>
- * Copyright 2013 Kyungwan Han <asura321@gmail.com>
- *
- * See http://refspecs.linuxfoundation.org/LSB_4.1.0/LSB-Core-generic/LSB-Core-generic/groupadd.html
- USE_GROUPADD(NEWTOY(groupadd, "<1>2g#<0S", TOYFLAG_NEEDROOT|TOYFLAG_SBIN))
- USE_GROUPADD(OLDTOY(addgroup, groupadd, TOYFLAG_NEEDROOT|TOYFLAG_SBIN))
- config GROUPADD
- bool "groupadd"
- default n
- help
- usage: groupadd [-S] [-g GID] [USER] GROUP
- Add a group or add a user to a group
-
- -g GID Group id
- -S Create a system group
- */
- #define FOR_groupadd
- #include "toys.h"
- #define GROUP_PATH "/etc/group"
- #define SECURE_GROUP_PATH "/etc/gshadow"
- GLOBALS(
- long gid;
- )
- /* Add a new group to the system, if GID is given then that is validated
- * to be free, else a free GID is choosen by self.
- * SYSTEM IDs are considered in the range 100 ... 999
- * update_group(), updates the entries in /etc/group, /etc/gshadow files
- */
- static void new_group()
- {
- char *entry = NULL;
- if (FLAG(g)) {
- if (TT.gid > INT_MAX) error_exit("gid should be less than '%d' ", INT_MAX);
- if (getgrgid(TT.gid)) error_exit("group '%ld' is in use", TT.gid);
- } else {
- if (FLAG(S)) TT.gid = CFG_TOYBOX_UID_SYS;
- else TT.gid = CFG_TOYBOX_UID_USR;
- //find unused gid
- while (getgrgid(TT.gid)) TT.gid++;
- }
- entry = xmprintf("%s:%s:%ld:", *toys.optargs, "x", TT.gid);
- update_password(GROUP_PATH, *toys.optargs, entry);
- free(entry);
- entry = xmprintf("%s:%s::", *toys.optargs, "!");
- update_password(SECURE_GROUP_PATH, *toys.optargs, entry);
- free(entry);
- }
- void groupadd_main(void)
- {
- struct group *grp = NULL;
- char *entry = NULL;
- if (toys.optflags && toys.optc == 2)
- help_exit("options, user and group can't be together");
- if (toys.optc == 2) { //add user to group
- //toys.optargs[0]- user, toys.optargs[1] - group
- xgetpwnam(*toys.optargs);
- if (!(grp = getgrnam(toys.optargs[1])))
- error_exit("group '%s' does not exist", toys.optargs[1]);
- if (!grp->gr_mem) entry = xmprintf("%s", *toys.optargs);
- else {
- int i;
- for (i = 0; grp->gr_mem[i]; i++)
- if (!strcmp(grp->gr_mem[i], *toys.optargs)) return;
- entry = xstrdup("");
- for (i=0; grp->gr_mem[i]; i++) {
- entry = xrealloc(entry, strlen(entry) + strlen(grp->gr_mem[i]) + 2);
- strcat(entry, grp->gr_mem[i]);
- strcat(entry, ",");
- }
- entry = xrealloc(entry, strlen(entry) + strlen(*toys.optargs) + 1);
- strcat(entry, *toys.optargs);
- }
- update_password(GROUP_PATH, grp->gr_name, entry);
- update_password(SECURE_GROUP_PATH, grp->gr_name, entry);
- free(entry);
- } else { //new group to be created
- char *s = *toys.optargs;
- /* investigate the group to be created */
- if (getgrnam(s)) error_exit("'%s' in use", s);
- if (s[strcspn(s, ":/\n")] || strlen(s) > LOGIN_NAME_MAX)
- error_exit("bad name");
- new_group();
- }
- }
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