/* groupdel.c - delete a group * * Copyright 2013 Ashwini Kumar * Copyright 2013 Kyungwan Han * * 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 usage: groupdel GROUP Delete a group or remove a user from a group */ #define FOR_groupdel #include "toys.h" char *comma_find(char *name, char *list) { int len = strlen(name); while (*list) { while (*list == ',') list++; if (!strncmp(name, list, len) && (!list[len] || list[len]==',')) return list; while (*list && *list!=',') list++; } return 0; } void groupdel_main(void) { struct group *grp = getgrnam(toys.optargs[toys.optc-1]); char *entry = 0; if (!grp) perror_exit("group '%s'", toys.optargs[toys.optc-1]); // delete user from group if (toys.optc == 2) { int i, len = 0, found = -1; char *s; xgetpwnam(*toys.optargs); if (grp->gr_mem) { for (i = 0; grp->gr_mem[i]; i++) { if (found == -1 && !strcmp(*toys.optargs, grp->gr_mem[i])) found = i; else len += strlen(grp->gr_mem[i]) + 1; } } if (found == -1) error_exit("user '%s' not in group '%s'", *toys.optargs, toys.optargs[1]); entry = s = xmalloc(len); for (i = 0; grp->gr_mem[i]; ) { if (i) *(s++) = ','; s = stpcpy(s, grp->gr_mem[i]); } // delete group } else { struct passwd *pw; endpwent(); // possibly this should be in toy_init()? for (;;) { if (!(pw = getpwent())) break; if (pw->pw_gid == grp->gr_gid) break; } if (pw) 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); if (CFG_TOYBOX_FREE) free(entry); }