[821] | 1 | /* vi: set sw=4 ts=4: */
|
---|
| 2 | /*
|
---|
| 3 | * adduser - add users to /etc/passwd and /etc/shadow
|
---|
| 4 | *
|
---|
| 5 | * Copyright (C) 1999 by Lineo, inc. and John Beppu
|
---|
| 6 | * Copyright (C) 1999,2000,2001 by John Beppu <beppu@codepoet.org>
|
---|
| 7 | *
|
---|
| 8 | * Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
|
---|
| 9 | */
|
---|
| 10 |
|
---|
| 11 | #include <stdio.h>
|
---|
| 12 | #include <sys/types.h>
|
---|
| 13 | #include <string.h>
|
---|
| 14 | #include <unistd.h>
|
---|
| 15 | #include <time.h>
|
---|
| 16 | #include <getopt.h>
|
---|
| 17 | #include <sys/stat.h>
|
---|
| 18 |
|
---|
| 19 | #include "busybox.h"
|
---|
| 20 |
|
---|
| 21 | #define DONT_SET_PASS (1 << 4)
|
---|
| 22 | #define DONT_MAKE_HOME (1 << 6)
|
---|
| 23 |
|
---|
| 24 |
|
---|
| 25 | /* remix */
|
---|
| 26 | /* EDR recoded such that the uid may be passed in *p */
|
---|
| 27 | static int passwd_study(const char *filename, struct passwd *p)
|
---|
| 28 | {
|
---|
| 29 | struct passwd *pw;
|
---|
| 30 | FILE *passwd;
|
---|
| 31 |
|
---|
| 32 | const int min = 500;
|
---|
| 33 | const int max = 65000;
|
---|
| 34 |
|
---|
| 35 | passwd = bb_xfopen(filename, "r");
|
---|
| 36 |
|
---|
| 37 | /* EDR if uid is out of bounds, set to min */
|
---|
| 38 | if ((p->pw_uid > max) || (p->pw_uid < min))
|
---|
| 39 | p->pw_uid = min;
|
---|
| 40 |
|
---|
| 41 | /* stuff to do:
|
---|
| 42 | * make sure login isn't taken;
|
---|
| 43 | * find free uid and gid;
|
---|
| 44 | */
|
---|
| 45 | while ((pw = fgetpwent(passwd))) {
|
---|
| 46 | if (strcmp(pw->pw_name, p->pw_name) == 0) {
|
---|
| 47 | /* return 0; */
|
---|
| 48 | return 1;
|
---|
| 49 | }
|
---|
| 50 | if ((pw->pw_uid >= p->pw_uid) && (pw->pw_uid < max)
|
---|
| 51 | && (pw->pw_uid >= min)) {
|
---|
| 52 | p->pw_uid = pw->pw_uid + 1;
|
---|
| 53 | }
|
---|
| 54 | }
|
---|
| 55 |
|
---|
| 56 | if (p->pw_gid == 0) {
|
---|
| 57 | /* EDR check for an already existing gid */
|
---|
| 58 | while (getgrgid(p->pw_uid) != NULL)
|
---|
| 59 | p->pw_uid++;
|
---|
| 60 |
|
---|
| 61 | /* EDR also check for an existing group definition */
|
---|
| 62 | if (getgrnam(p->pw_name) != NULL)
|
---|
| 63 | return 3;
|
---|
| 64 |
|
---|
| 65 | /* EDR create new gid always = uid */
|
---|
| 66 | p->pw_gid = p->pw_uid;
|
---|
| 67 | }
|
---|
| 68 |
|
---|
| 69 | /* EDR bounds check */
|
---|
| 70 | if ((p->pw_uid > max) || (p->pw_uid < min))
|
---|
| 71 | return 2;
|
---|
| 72 |
|
---|
| 73 | /* return 1; */
|
---|
| 74 | return 0;
|
---|
| 75 | }
|
---|
| 76 |
|
---|
| 77 | static void addgroup_wrapper(struct passwd *p)
|
---|
| 78 | {
|
---|
| 79 | char *cmd;
|
---|
| 80 |
|
---|
| 81 | cmd = bb_xasprintf("addgroup -g %d \"%s\"", p->pw_gid, p->pw_name);
|
---|
| 82 | system(cmd);
|
---|
| 83 | free(cmd);
|
---|
| 84 | }
|
---|
| 85 |
|
---|
| 86 | static void passwd_wrapper(const char *login) ATTRIBUTE_NORETURN;
|
---|
| 87 |
|
---|
| 88 | static void passwd_wrapper(const char *login)
|
---|
| 89 | {
|
---|
| 90 | static const char prog[] = "passwd";
|
---|
| 91 | execlp(prog, prog, login, NULL);
|
---|
| 92 | bb_error_msg_and_die("Failed to execute '%s', you must set the password for '%s' manually", prog, login);
|
---|
| 93 | }
|
---|
| 94 |
|
---|
| 95 | /* putpwent(3) remix */
|
---|
| 96 | static int adduser(struct passwd *p, unsigned long flags)
|
---|
| 97 | {
|
---|
| 98 | FILE *file;
|
---|
| 99 | int addgroup = !p->pw_gid;
|
---|
| 100 |
|
---|
| 101 | /* make sure everything is kosher and setup uid && gid */
|
---|
| 102 | file = bb_xfopen(bb_path_passwd_file, "a");
|
---|
| 103 | fseek(file, 0, SEEK_END);
|
---|
| 104 |
|
---|
| 105 | switch (passwd_study(bb_path_passwd_file, p)) {
|
---|
| 106 | case 1:
|
---|
| 107 | bb_error_msg_and_die("%s: login already in use", p->pw_name);
|
---|
| 108 | case 2:
|
---|
| 109 | bb_error_msg_and_die("illegal uid or no uids left");
|
---|
| 110 | case 3:
|
---|
| 111 | bb_error_msg_and_die("%s: group name already in use", p->pw_name);
|
---|
| 112 | }
|
---|
| 113 |
|
---|
| 114 | /* add to passwd */
|
---|
| 115 | if (putpwent(p, file) == -1) {
|
---|
| 116 | bb_perror_nomsg_and_die();
|
---|
| 117 | }
|
---|
| 118 | fclose(file);
|
---|
| 119 |
|
---|
| 120 | #if ENABLE_FEATURE_SHADOWPASSWDS
|
---|
| 121 | /* add to shadow if necessary */
|
---|
| 122 | file = bb_xfopen(bb_path_shadow_file, "a");
|
---|
| 123 | fseek(file, 0, SEEK_END);
|
---|
| 124 | fprintf(file, "%s:!:%ld:%d:%d:%d:::\n",
|
---|
| 125 | p->pw_name, /* username */
|
---|
| 126 | time(NULL) / 86400, /* sp->sp_lstchg */
|
---|
| 127 | 0, /* sp->sp_min */
|
---|
| 128 | 99999, /* sp->sp_max */
|
---|
| 129 | 7); /* sp->sp_warn */
|
---|
| 130 | fclose(file);
|
---|
| 131 | #endif
|
---|
| 132 |
|
---|
| 133 | /* add to group */
|
---|
| 134 | /* addgroup should be responsible for dealing w/ gshadow */
|
---|
| 135 | /* if using a pre-existing group, don't create one */
|
---|
| 136 | if (addgroup) addgroup_wrapper(p);
|
---|
| 137 |
|
---|
| 138 | /* Clear the umask for this process so it doesn't
|
---|
| 139 | * * screw up the permissions on the mkdir and chown. */
|
---|
| 140 | umask(0);
|
---|
| 141 | if (!(flags & DONT_MAKE_HOME)) {
|
---|
| 142 | /* Set the owner and group so it is owned by the new user,
|
---|
| 143 | then fix up the permissions to 2755. Can't do it before
|
---|
| 144 | since chown will clear the setgid bit */
|
---|
| 145 | if (mkdir(p->pw_dir, 0755)
|
---|
| 146 | || chown(p->pw_dir, p->pw_uid, p->pw_gid)
|
---|
| 147 | || chmod(p->pw_dir, 02755)) {
|
---|
| 148 | bb_perror_msg("%s", p->pw_dir);
|
---|
| 149 | }
|
---|
| 150 | }
|
---|
| 151 |
|
---|
| 152 | if (!(flags & DONT_SET_PASS)) {
|
---|
| 153 | /* interactively set passwd */
|
---|
| 154 | passwd_wrapper(p->pw_name);
|
---|
| 155 | }
|
---|
| 156 |
|
---|
| 157 | return 0;
|
---|
| 158 | }
|
---|
| 159 |
|
---|
| 160 | /*
|
---|
| 161 | * adduser will take a login_name as its first parameter.
|
---|
| 162 | *
|
---|
| 163 | * home
|
---|
| 164 | * shell
|
---|
| 165 | * gecos
|
---|
| 166 | *
|
---|
| 167 | * can be customized via command-line parameters.
|
---|
| 168 | * ________________________________________________________________________ */
|
---|
| 169 | int adduser_main(int argc, char **argv)
|
---|
| 170 | {
|
---|
| 171 | struct passwd pw;
|
---|
| 172 | const char *usegroup = NULL;
|
---|
| 173 | unsigned long flags;
|
---|
| 174 |
|
---|
| 175 | pw.pw_gecos = "Linux User,,,";
|
---|
| 176 | pw.pw_shell = (char *)DEFAULT_SHELL;
|
---|
| 177 | pw.pw_dir = NULL;
|
---|
| 178 |
|
---|
| 179 | /* check for min, max and missing args and exit on error */
|
---|
| 180 | bb_opt_complementally = "-1:?1:?";
|
---|
| 181 | flags = bb_getopt_ulflags(argc, argv, "h:g:s:G:DSH", &pw.pw_dir, &pw.pw_gecos, &pw.pw_shell, &usegroup);
|
---|
| 182 |
|
---|
| 183 | /* got root? */
|
---|
| 184 | if(geteuid()) {
|
---|
| 185 | bb_error_msg_and_die(bb_msg_perm_denied_are_you_root);
|
---|
| 186 | }
|
---|
| 187 |
|
---|
| 188 | /* create string for $HOME if not specified already */
|
---|
| 189 | if (!pw.pw_dir) {
|
---|
| 190 | snprintf(bb_common_bufsiz1, BUFSIZ, "/home/%s", argv[optind]);
|
---|
| 191 | pw.pw_dir = &bb_common_bufsiz1[0];
|
---|
| 192 | }
|
---|
| 193 |
|
---|
| 194 | /* create a passwd struct */
|
---|
| 195 | pw.pw_name = argv[optind];
|
---|
| 196 | pw.pw_passwd = "x";
|
---|
| 197 | pw.pw_uid = 0;
|
---|
| 198 | pw.pw_gid = (usegroup) ? bb_xgetgrnam(usegroup) : 0; /* exits on failure */
|
---|
| 199 |
|
---|
| 200 | /* grand finale */
|
---|
| 201 | return adduser(&pw, flags);
|
---|
| 202 | }
|
---|