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