1 /* groupdel.c - delete a group 2 * 3 * Copyright 2013 Ashwini Kumar <ak.ashwini1981 (at) gmail.com> 4 * Copyright 2013 Kyungwan Han <asura321 (at) gmail.com> 5 * 6 * See http://refspecs.linuxfoundation.org/LSB_4.1.0/LSB-Core-generic/LSB-Core-generic/groupdel.html 7 8 USE_GROUPDEL(NEWTOY(groupdel, "<1>2", TOYFLAG_NEEDROOT|TOYFLAG_SBIN)) 9 USE_GROUPDEL(OLDTOY(delgroup, groupdel, TOYFLAG_NEEDROOT|TOYFLAG_SBIN)) 10 11 config GROUPDEL 12 bool "groupdel" 13 default n 14 help 15 usage: groupdel [USER] GROUP 16 17 Delete a group or remove a user from a group 18 */ 19 20 #define FOR_groupdel 21 #include "toys.h" 22 23 void groupdel_main(void) 24 { 25 struct group *grp = xgetgrnam(toys.optargs[toys.optc-1]); 26 char *entry = 0; 27 28 // delete user from group 29 if (toys.optc == 2) { 30 int i, len = 0, found = 0; 31 char *s; 32 33 xgetpwnam(*toys.optargs); 34 if (grp->gr_mem) for (i = 0; grp->gr_mem[i]; i++) { 35 if (!found && !strcmp(*toys.optargs, grp->gr_mem[i])) found++; 36 else len += strlen(grp->gr_mem[i]) + 1; 37 } 38 if (!found) 39 error_exit("user '%s' not in group '%s'", *toys.optargs, toys.optargs[1]); 40 41 entry = s = xmalloc(len); 42 for (i = 0; grp->gr_mem[i]; ) { 43 if (i) *(s++) = ','; 44 s = stpcpy(s, grp->gr_mem[i]); 45 } 46 47 // delete group 48 } else { 49 struct passwd *pw; 50 51 for (endpwent(); (pw = getpwent());) 52 if (pw->pw_gid == grp->gr_gid) break; 53 54 if (pw) error_exit("can't remove primary group of user '%s'", pw->pw_name); 55 if (CFG_TOYBOX_FREE) endpwent(); 56 } 57 58 update_password("/etc/group", grp->gr_name, entry); 59 update_password("/etc/gshadow", grp->gr_name, entry); 60 if (CFG_TOYBOX_FREE) free(entry); 61 } 62
