Mercurial > hg > toybox
annotate toys/pending/useradd.c @ 1776:7bf68329eb3b draft default tip
Repository switched to git at https://github.com/landley/toybox
| author | Rob Landley <rob@landley.net> |
|---|---|
| date | Thu, 09 Apr 2015 02:28:32 -0500 |
| parents | 5fac2769a159 |
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| rev | line source |
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1 /* useradd.c - add a new user |
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2 * |
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3 * Copyright 2013 Ashwini Kumar <ak.ashwini@gmail.com> |
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4 * Copyright 2013 Kyungwan Han <asura321@gmail.com> |
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5 * |
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6 * See http://refspecs.linuxfoundation.org/LSB_4.1.0/LSB-Core-generic/LSB-Core-generic/useradd.html |
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7 |
| 1476 | 8 USE_USERADD(NEWTOY(useradd, "<1>2u#<0G:s:g:h:SDH", TOYFLAG_NEEDROOT|TOYFLAG_UMASK|TOYFLAG_SBIN)) |
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9 USE_USERADD(OLDTOY(adduser, useradd, TOYFLAG_NEEDROOT|TOYFLAG_UMASK|TOYFLAG_SBIN)) |
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10 |
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11 config USERADD |
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12 bool "useradd" |
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13 default n |
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14 help |
| 1476 | 15 usage: useradd [-SDH] [-h DIR] [-s SHELL] [-G GRP] [-g NAME] [-u UID] USER [GROUP] |
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16 |
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17 Create new user, or add USER to GROUP |
| 1476 | 18 |
| 19 -D Don't assign a password | |
| 20 -g NAME Real name | |
| 21 -G GRP Add user to existing group | |
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22 -h DIR Home directory |
| 1476 | 23 -H Don't create home directory |
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24 -s SHELL Login shell |
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25 -S Create a system user |
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26 -u UID User id |
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27 */ |
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28 |
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29 #define FOR_useradd |
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30 #include "toys.h" |
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31 |
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32 GLOBALS( |
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33 char *dir; |
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34 char *gecos; |
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35 char *shell; |
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36 char *u_grp; |
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37 long uid; |
| 1476 | 38 |
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39 long gid; |
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40 ) |
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41 |
| 1476 | 42 void useradd_main(void) |
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43 { |
| 1476 | 44 char *s = *toys.optargs, *entry; |
| 45 struct passwd pwd; | |
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46 |
| 1476 | 47 // Act like groupadd? |
| 48 if (toys.optc == 2) { | |
| 49 if (toys.optflags) { | |
| 50 toys.exithelp = 1; | |
| 51 error_exit("options with USER GROUP"); | |
| 52 } | |
| 53 xexec((char *[]){"groupadd", toys.optargs[0], toys.optargs[1], 0}); | |
| 54 } | |
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55 |
| 1476 | 56 // Sanity check user to add |
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57 if (s[strcspn(s, ":/\n")] || strlen(s) > LOGIN_NAME_MAX) |
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58 error_exit("bad username"); |
| 1476 | 59 // race condition: two adds at same time? |
| 60 if (getpwnam(s)) error_exit("'%s' in use", s); | |
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61 |
| 1476 | 62 // Add a new group to the system, if UID is given then that is validated |
| 63 // to be free, else a free UID is choosen by self. | |
| 64 // SYSTEM IDs are considered in the range 100 ... 999 | |
| 65 // add_user(), add a new entry in /etc/passwd, /etc/shadow files | |
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66 |
| 1476 | 67 pwd.pw_name = s; |
| 68 pwd.pw_passwd = "x"; | |
| 69 pwd.pw_gecos = TT.gecos ? TT.gecos : "Linux User,"; | |
| 70 pwd.pw_dir = TT.dir ? TT.dir : xmprintf("/home/%s", *toys.optargs); | |
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71 |
| 1476 | 72 if (!TT.shell) { |
| 73 TT.shell = getenv("SHELL"); | |
| 74 | |
| 75 if (!TT.shell) { | |
| 76 struct passwd *pw = getpwuid(getuid()); | |
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77 |
| 1476 | 78 if (pw && pw->pw_shell && *pw->pw_shell) TT.shell = xstrdup(pw->pw_shell); |
| 79 else TT.shell = "/bin/sh"; | |
| 80 } | |
| 81 } | |
| 82 pwd.pw_shell = TT.shell; | |
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83 |
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84 if (toys.optflags & FLAG_u) { |
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85 if (TT.uid > INT_MAX) error_exit("bad uid"); |
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86 if (getpwuid(TT.uid)) error_exit("uid '%ld' in use", TT.uid); |
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87 } else { |
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88 if (toys.optflags & FLAG_S) TT.uid = CFG_TOYBOX_UID_SYS; |
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89 else TT.uid = CFG_TOYBOX_UID_USR; |
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90 //find unused uid |
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91 while (getpwuid(TT.uid)) TT.uid++; |
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92 } |
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93 pwd.pw_uid = TT.uid; |
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94 |
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95 if (toys.optflags & FLAG_G) TT.gid = xgetgrnam(TT.u_grp)->gr_gid; |
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96 else { |
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97 // Set the GID for the user, if not specified |
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98 if (toys.optflags & FLAG_S) TT.gid = CFG_TOYBOX_UID_SYS; |
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99 else TT.gid = CFG_TOYBOX_UID_USR; |
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100 if (getgrnam(pwd.pw_name)) error_exit("group '%s' in use", pwd.pw_name); |
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101 //find unused gid |
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102 while (getgrgid(TT.gid)) TT.gid++; |
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103 } |
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104 pwd.pw_gid = TT.gid; |
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105 |
| 1476 | 106 // Create a new group for user |
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107 if (!(toys.optflags & FLAG_G)) { |
| 1476 | 108 char *s = xmprintf("-g%ld", pwd.pw_gid); |
| 109 | |
| 110 if (xrun((char *[]){"groupadd", *toys.optargs, s, 0})) | |
| 111 error_msg("addgroup -g%ld fail", pwd.pw_gid); | |
| 112 free(s); | |
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113 } |
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114 |
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115 /*add user to system |
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116 * 1. add an entry to /etc/passwd and /etcshadow file |
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117 * 2. Copy /etc/skel dir contents to use home dir |
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118 * 3. update the user passwd by running 'passwd' utility |
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119 */ |
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120 |
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121 // 1. add an entry to /etc/passwd and /etc/shadow file |
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122 entry = xmprintf("%s:%s:%ld:%ld:%s:%s:%s", pwd.pw_name, pwd.pw_passwd, |
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123 pwd.pw_uid, pwd.pw_gid, pwd.pw_gecos, pwd.pw_dir, pwd.pw_shell); |
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124 if (update_password("/etc/passwd", pwd.pw_name, entry)) error_exit("updating passwd file failed"); |
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125 free(entry); |
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126 |
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127 if (toys.optflags & FLAG_S) |
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128 entry = xmprintf("%s:!!:%u::::::", pwd.pw_name, |
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129 (unsigned)(time(NULL))/(24*60*60)); //passwd is not set initially |
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130 else entry = xmprintf("%s:!!:%u:%ld:%ld:%ld:::", pwd.pw_name, |
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131 (unsigned)(time(NULL))/(24*60*60), 0, 99999, 7); //passwd is not set initially |
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132 update_password("/etc/shadow", pwd.pw_name, entry); |
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133 free(entry); |
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134 |
| 1476 | 135 // create home dir & copy skel dir to home |
| 136 if (!(toys.optflags & (FLAG_S|FLAG_H))) { | |
| 137 char *skel = "/etc/skel", *p = pwd.pw_dir; | |
| 138 | |
| 139 // Copy and change ownership | |
| 140 if (access(p, F_OK)) { | |
| 141 if (!access(skel, R_OK)) | |
| 142 toys.exitval = xrun((char *[]){"cp", "-R", skel, p, 0}); | |
| 143 else toys.exitval = xrun((char *[]){"mkdir", "-p", p, 0}); | |
| 144 if (!toys.exitval) | |
| 145 toys.exitval |= xrun((char *[]){"chown", "-R", | |
| 146 xmprintf("%u:%u", TT.uid, TT.gid), p, 0}); | |
| 147 wfchmodat(AT_FDCWD, p, 0700); | |
| 148 } else fprintf(stderr, "'%s' exists, not copying '%s'", p, skel); | |
| 149 } | |
|
1091
c4d4a6e7473f
useradd, groupadd, and mkpasswd submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
150 |
|
c4d4a6e7473f
useradd, groupadd, and mkpasswd submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
151 //3. update the user passwd by running 'passwd' utility |
| 1476 | 152 if (!(toys.optflags & FLAG_D)) |
| 153 if (xrun((char *[]){"passwd", pwd.pw_name, 0})) error_exit("passwd"); | |
| 154 | |
|
1091
c4d4a6e7473f
useradd, groupadd, and mkpasswd submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
155 if (toys.optflags & FLAG_G) { |
|
c4d4a6e7473f
useradd, groupadd, and mkpasswd submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
156 /*add user to the existing group, invoke addgroup command */ |
| 1476 | 157 if (xrun((char *[]){"groupadd", *toys.optargs, TT.u_grp, 0})) |
| 158 error_exit("groupadd"); | |
|
1091
c4d4a6e7473f
useradd, groupadd, and mkpasswd submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
159 } |
|
c4d4a6e7473f
useradd, groupadd, and mkpasswd submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
160 } |