/* groupdel.c - delete a group * * Copyright 2013 Ashwini Kumar <ak.ashwini1981@gmail.com> * Copyright 2013 Kyungwan Han <asura321@gmail.com> * * See http://refspecs.linuxfoundation.org/LSB_4.1.0/LSB-Core-generic/LSB-Core-generic/groupdel.html USE_GROUPDEL(NEWTOY(groupdel, "<1>2", TOYFLAG_NEEDROOT|TOYFLAG_SBIN)) USE_GROUPDEL(OLDTOY(delgroup, groupdel, OPTSTR_groupdel, TOYFLAG_NEEDROOT|TOYFLAG_SBIN)) config GROUPDEL bool "groupdel" default n help usage: delgroup [USER] GROUP groupdel GROUP Delete a group or delete a user from a group */ #define FOR_groupdel #include "toys.h" void groupdel_main(void) { struct group *grp = NULL; char *entry = NULL; if (toys.optc == 2) { //del user from group //toys.optargs[0]- user, toys.optargs[1] - group if (!getpwnam(toys.optargs[0])) error_exit("user '%s' does not exist", toys.optargs[0]); if (!(grp = getgrnam(toys.optargs[1]))) error_exit("group '%s' does not exist", toys.optargs[1]); if (!(grp = getgrnam(toys.optargs[1]))) error_exit("group '%s' does not exist", toys.optargs[1]); if (!grp->gr_mem) return; else { int i, found = -1; for (i = 0; grp->gr_mem[i] && (found == -1); i++) if (!strcmp(grp->gr_mem[i], *toys.optargs)) found = i; if (found == -1) { xprintf("%s: The user '%s' is not a member of '%s'\n", toys.which->name, toys.optargs[0], toys.optargs[1]); return; } entry = xstrdup(""); for (i=0; grp->gr_mem[i]; i++) { if (found != i) { //leave out user from grp member list if (i && *entry) strcat(entry, ","); entry = xrealloc(entry, strlen(entry) + strlen(grp->gr_mem[i]) + 2); strcat(entry, grp->gr_mem[i]); } } } } else { //delete the group struct passwd *pw = NULL; if (!(grp = getgrnam(*toys.optargs))) error_exit("group '%s' doesn't exist", *toys.optargs); //is it a primary grp of user while ((pw = getpwent())) { if (pw->pw_gid == grp->gr_gid) { endpwent(); error_exit("can't remove primary group of user '%s'", pw->pw_name); } } endpwent(); } update_password("/etc/group", grp->gr_name, entry); update_password("/etc/gshadow", grp->gr_name, entry); free(entry); }