| [821] | 1 | /* vi: set sw=4 ts=4: */
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| 2 | /*
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| 3 | * addgroup - add users to /etc/passwd and /etc/shadow
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| 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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| 7 | *
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| 8 | * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
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| 9 | *
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| 10 | */
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| 11 |
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| 12 | #include <stdio.h>
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| 13 | #include <string.h>
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| 14 | #include <sys/types.h>
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| 15 | #include <unistd.h>
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| 16 |
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| 17 | #include "busybox.h"
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| 18 |
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| 19 | /* make sure gr_name isn't taken, make sure gid is kosher
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| 20 | * return 1 on failure */
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| 21 | static int group_study(struct group *g)
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| 22 | {
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| 23 | FILE *etc_group;
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| 24 | gid_t desired;
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| 25 |
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| 26 | struct group *grp;
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| 27 | const int max = 65000;
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| 28 |
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| 29 | etc_group = bb_xfopen(bb_path_group_file, "r");
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| 30 |
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| 31 | /* make sure gr_name isn't taken, make sure gid is kosher */
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| 32 | desired = g->gr_gid;
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| 33 | while ((grp = fgetgrent(etc_group))) {
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| 34 | if ((strcmp(grp->gr_name, g->gr_name)) == 0) {
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| 35 | bb_error_msg_and_die("%s: group already in use", g->gr_name);
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| 36 | }
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| 37 | if ((desired) && grp->gr_gid == desired) {
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| 38 | bb_error_msg_and_die("%d: gid already in use",
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| 39 | desired);
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| 40 | }
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| 41 | if ((grp->gr_gid > g->gr_gid) && (grp->gr_gid < max)) {
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| 42 | g->gr_gid = grp->gr_gid;
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| 43 | }
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| 44 | }
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| 45 | fclose(etc_group);
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| 46 |
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| 47 | /* gid */
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| 48 | if (desired) {
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| 49 | g->gr_gid = desired;
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| 50 | } else {
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| 51 | g->gr_gid++;
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| 52 | }
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| 53 | /* return 1; */
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| 54 | return 0;
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| 55 | }
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| 56 |
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| 57 | /* append a new user to the passwd file */
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| 58 | static int addgroup(char *group, gid_t gid, const char *user)
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| 59 | {
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| 60 | FILE *file;
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| 61 | struct group gr;
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| 62 |
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| 63 | /* make sure gid and group haven't already been allocated */
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| 64 | gr.gr_gid = gid;
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| 65 | gr.gr_name = group;
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| 66 | if (group_study(&gr))
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| 67 | return 1;
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| 68 |
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| 69 | /* add entry to group */
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| 70 | file = bb_xfopen(bb_path_group_file, "a");
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| 71 | /* group:passwd:gid:userlist */
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| 72 | fprintf(file, "%s:%s:%d:%s\n", group, "x", gr.gr_gid, user);
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| 73 | fclose(file);
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| 74 |
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| 75 | #if ENABLE_FEATURE_SHADOWPASSWDS
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| 76 | file = bb_xfopen(bb_path_gshadow_file, "a");
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| 77 | fprintf(file, "%s:!::\n", group);
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| 78 | fclose(file);
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| 79 | #endif
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| 80 |
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| 81 | /* return 1; */
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| 82 | return 0;
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| 83 | }
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| 84 |
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| 85 | /*
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| 86 | * addgroup will take a login_name as its first parameter.
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| 87 | *
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| 88 | * gid
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| 89 | *
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| 90 | * can be customized via command-line parameters.
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| 91 | * ________________________________________________________________________ */
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| 92 | int addgroup_main(int argc, char **argv)
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| 93 | {
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| 94 | char *group;
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| 95 | gid_t gid = 0;
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| 96 |
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| 97 | /* check for min, max and missing args and exit on error */
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| 98 | bb_opt_complementally = "-1:?2:?";
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| 99 |
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| 100 | if (bb_getopt_ulflags(argc, argv, "g:", &group)) {
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| 101 | gid = bb_xgetlarg(group, 10, 0, LONG_MAX);
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| 102 | }
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| 103 | /* move past the commandline options */
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| 104 | argv += optind;
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| 105 |
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| 106 | /* need to be root */
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| 107 | if(geteuid()) {
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| 108 | bb_error_msg_and_die(bb_msg_perm_denied_are_you_root);
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| 109 | }
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| 110 |
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| 111 | /* werk */
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| 112 | return addgroup(argv[0], gid, (argv[1]) ? argv[1] : "");
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| 113 | }
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