[821] | 1 | /* vi: set sw=4 ts=4: */
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| 2 | /*
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[1770] | 3 | * deluser/delgroup implementation for busybox
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[821] | 4 | *
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| 5 | * Copyright (C) 1999 by Lineo, inc. and John Beppu
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| 6 | * Copyright (C) 1999,2000,2001 by John Beppu <beppu@codepoet.org>
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[1770] | 7 | * Copyright (C) 2007 by Tito Ragusa <farmatito@tiscali.it>
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[821] | 8 | *
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[1770] | 9 | * Licensed under GPL version 2, see file LICENSE in this tarball for details.
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[821] | 10 | *
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| 11 | */
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| 12 |
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[1770] | 13 | #include "libbb.h"
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[821] | 14 |
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[1770] | 15 | /* Status */
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| 16 | #define STATUS_OK 0
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| 17 | #define NAME_NOT_FOUND 1
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| 18 | #define MEMBER_NOT_FOUND 2
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[821] | 19 |
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[1770] | 20 | static void del_line_matching(char **args,
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| 21 | const char *filename,
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| 22 | FILE *(*fopen_func)(const char *fileName, const char *mode))
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[821] | 23 | {
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[1770] | 24 | FILE *passwd;
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| 25 | smallint error = NAME_NOT_FOUND;
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| 26 | char *name = (ENABLE_FEATURE_DEL_USER_FROM_GROUP && args[2]) ? args[2] : args[1];
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| 27 | char *line, *del;
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| 28 | char *new = xzalloc(1);
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[821] | 29 |
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[1770] | 30 | passwd = fopen_func(filename, "r");
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| 31 | if (passwd) {
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| 32 | while ((line = xmalloc_fgets(passwd))) {
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| 33 | int len = strlen(name);
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[821] | 34 |
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[1770] | 35 | if (strncmp(line, name, len) == 0
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| 36 | && line[len] == ':'
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| 37 | ) {
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| 38 | error = STATUS_OK;
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| 39 | if (ENABLE_FEATURE_DEL_USER_FROM_GROUP) {
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| 40 | struct group *gr;
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| 41 | char *p;
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| 42 | if (args[2]
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| 43 | /* There were two args on commandline */
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| 44 | && (gr = getgrnam(name))
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| 45 | /* The group was not deleted in the meanwhile */
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| 46 | && (p = strrchr(line, ':'))
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| 47 | /* We can find a pointer to the last ':' */
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| 48 | ) {
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| 49 | error = MEMBER_NOT_FOUND;
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| 50 | /* Move past ':' (worst case to '\0') and cut the line */
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| 51 | p[1] = '\0';
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| 52 | /* Reuse p */
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| 53 | for (p = xzalloc(1); *gr->gr_mem != NULL; gr->gr_mem++) {
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| 54 | /* Add all the other group members */
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| 55 | if (strcmp(args[1], *gr->gr_mem) != 0) {
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| 56 | del = p;
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| 57 | p = xasprintf("%s%s%s", p, p[0] ? "," : "", *gr->gr_mem);
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| 58 | free(del);
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| 59 | } else
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| 60 | error = STATUS_OK;
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| 61 | }
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| 62 | /* Recompose the line */
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| 63 | line = xasprintf("%s%s\n", line, p);
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| 64 | if (ENABLE_FEATURE_CLEAN_UP) free(p);
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| 65 | } else
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| 66 | goto skip;
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| 67 | }
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| 68 | }
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| 69 | del = new;
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| 70 | new = xasprintf("%s%s", new, line);
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| 71 | free(del);
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| 72 | skip:
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| 73 | free(line);
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| 74 | }
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[821] | 75 |
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[1770] | 76 | if (ENABLE_FEATURE_CLEAN_UP) fclose(passwd);
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[821] | 77 |
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[1770] | 78 | if (error) {
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| 79 | if (ENABLE_FEATURE_DEL_USER_FROM_GROUP && error == MEMBER_NOT_FOUND) {
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| 80 | /* Set the correct values for error message */
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| 81 | filename = name;
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| 82 | name = args[1];
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[821] | 83 | }
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[1770] | 84 | bb_error_msg("can't find %s in %s", name, filename);
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[821] | 85 | } else {
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[1770] | 86 | passwd = fopen_func(filename, "w");
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| 87 | if (passwd) {
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| 88 | fputs(new, passwd);
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| 89 | if (ENABLE_FEATURE_CLEAN_UP) fclose(passwd);
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| 90 | }
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[821] | 91 | }
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| 92 | }
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[1770] | 93 | free(new);
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[821] | 94 | }
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| 95 |
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[1770] | 96 | int deluser_main(int argc, char **argv);
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[821] | 97 | int deluser_main(int argc, char **argv)
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| 98 | {
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[1770] | 99 | if (argc == 2
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| 100 | || (ENABLE_FEATURE_DEL_USER_FROM_GROUP
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| 101 | && (applet_name[3] == 'g' && argc == 3))
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| 102 | ) {
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| 103 | if (geteuid())
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| 104 | bb_error_msg_and_die(bb_msg_perm_denied_are_you_root);
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| 105 |
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| 106 | if ((ENABLE_FEATURE_DEL_USER_FROM_GROUP && argc != 3)
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| 107 | || ENABLE_DELUSER
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| 108 | || (ENABLE_DELGROUP && ENABLE_DESKTOP)
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| 109 | ) {
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| 110 | if (ENABLE_DELUSER
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| 111 | && (!ENABLE_DELGROUP || applet_name[3] == 'u')
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| 112 | ) {
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| 113 | del_line_matching(argv, bb_path_passwd_file, xfopen);
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| 114 | if (ENABLE_FEATURE_SHADOWPASSWDS)
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| 115 | del_line_matching(argv, bb_path_shadow_file, fopen_or_warn);
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| 116 | } else if (ENABLE_DESKTOP && ENABLE_DELGROUP && getpwnam(argv[1]))
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| 117 | bb_error_msg_and_die("can't remove primary group of user %s", argv[1]);
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[821] | 118 | }
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[1770] | 119 | del_line_matching(argv, bb_path_group_file, xfopen);
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[821] | 120 | if (ENABLE_FEATURE_SHADOWPASSWDS)
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[1770] | 121 | del_line_matching(argv, bb_path_gshadow_file, fopen_or_warn);
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| 122 | return EXIT_SUCCESS;
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| 123 | } else
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| 124 | bb_show_usage();
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[821] | 125 | }
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