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126 lines
3.4 KiB
C
126 lines
3.4 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* deluser/delgroup implementation for busybox
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*
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* Copyright (C) 1999 by Lineo, inc. and John Beppu
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* Copyright (C) 1999,2000,2001 by John Beppu <beppu@codepoet.org>
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* Copyright (C) 2007 by Tito Ragusa <farmatito@tiscali.it>
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*
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* Licensed under GPL version 2, see file LICENSE in this tarball for details.
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*
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*/
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#include "libbb.h"
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/* Status */
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#define STATUS_OK 0
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#define NAME_NOT_FOUND 1
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#define MEMBER_NOT_FOUND 2
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static void del_line_matching(char **args,
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const char *filename,
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FILE *(*fopen_func)(const char *fileName, const char *mode))
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{
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FILE *passwd;
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smallint error = NAME_NOT_FOUND;
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char *name = (ENABLE_FEATURE_DEL_USER_FROM_GROUP && args[2]) ? args[2] : args[1];
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char *line, *del;
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char *new = xzalloc(1);
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passwd = fopen_func(filename, "r");
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if (passwd) {
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while ((line = xmalloc_fgets(passwd))) {
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int len = strlen(name);
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if (strncmp(line, name, len) == 0
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&& line[len] == ':'
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) {
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error = STATUS_OK;
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if (ENABLE_FEATURE_DEL_USER_FROM_GROUP) {
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struct group *gr;
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char *p;
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if (args[2]
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/* There were two args on commandline */
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&& (gr = getgrnam(name))
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/* The group was not deleted in the meanwhile */
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&& (p = strrchr(line, ':'))
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/* We can find a pointer to the last ':' */
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) {
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error = MEMBER_NOT_FOUND;
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/* Move past ':' (worst case to '\0') and cut the line */
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p[1] = '\0';
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/* Reuse p */
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for (p = xzalloc(1); *gr->gr_mem != NULL; gr->gr_mem++) {
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/* Add all the other group members */
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if (strcmp(args[1], *gr->gr_mem) != 0) {
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del = p;
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p = xasprintf("%s%s%s", p, p[0] ? "," : "", *gr->gr_mem);
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free(del);
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} else
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error = STATUS_OK;
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}
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/* Recompose the line */
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line = xasprintf("%s%s\n", line, p);
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if (ENABLE_FEATURE_CLEAN_UP) free(p);
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} else
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goto skip;
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}
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}
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del = new;
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new = xasprintf("%s%s", new, line);
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free(del);
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skip:
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free(line);
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}
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if (ENABLE_FEATURE_CLEAN_UP) fclose(passwd);
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if (error) {
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if (ENABLE_FEATURE_DEL_USER_FROM_GROUP && error == MEMBER_NOT_FOUND) {
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/* Set the correct values for error message */
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filename = name;
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name = args[1];
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}
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bb_error_msg("can't find %s in %s", name, filename);
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} else {
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passwd = fopen_func(filename, "w");
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if (passwd) {
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fputs(new, passwd);
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if (ENABLE_FEATURE_CLEAN_UP) fclose(passwd);
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}
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}
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}
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free(new);
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}
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int deluser_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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int deluser_main(int argc, char **argv)
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{
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if (argc == 2
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|| (ENABLE_FEATURE_DEL_USER_FROM_GROUP
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&& (applet_name[3] == 'g' && argc == 3))
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) {
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if (geteuid())
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bb_error_msg_and_die(bb_msg_perm_denied_are_you_root);
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if ((ENABLE_FEATURE_DEL_USER_FROM_GROUP && argc != 3)
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|| ENABLE_DELUSER
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|| (ENABLE_DELGROUP && ENABLE_DESKTOP)
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) {
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if (ENABLE_DELUSER
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&& (!ENABLE_DELGROUP || applet_name[3] == 'u')
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) {
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del_line_matching(argv, bb_path_passwd_file, xfopen);
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if (ENABLE_FEATURE_SHADOWPASSWDS)
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del_line_matching(argv, bb_path_shadow_file, fopen_or_warn);
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} else if (ENABLE_DESKTOP && ENABLE_DELGROUP && getpwnam(argv[1]))
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bb_error_msg_and_die("can't remove primary group of user %s", argv[1]);
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}
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del_line_matching(argv, bb_path_group_file, xfopen);
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if (ENABLE_FEATURE_SHADOWPASSWDS)
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del_line_matching(argv, bb_path_gshadow_file, fopen_or_warn);
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return EXIT_SUCCESS;
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} else
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bb_show_usage();
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}
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