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-rw-r--r--toys/pending/useradd.c204
1 files changed, 70 insertions, 134 deletions
diff --git a/toys/pending/useradd.c b/toys/pending/useradd.c
index 1d2bf301..9f1fa4c5 100644
--- a/toys/pending/useradd.c
+++ b/toys/pending/useradd.c
@@ -5,24 +5,24 @@
*
* See http://refspecs.linuxfoundation.org/LSB_4.1.0/LSB-Core-generic/LSB-Core-generic/useradd.html
-USE_USERADD(NEWTOY(useradd, "<1>2u#<0G:s:g:h:SDH", TOYFLAG_NEEDROOT|TOYFLAG_SBIN))
-USE_USERADD(OLDTOY(adduser, useradd, OPTSTR_useradd, TOYFLAG_NEEDROOT|TOYFLAG_SBIN))
+USE_USERADD(NEWTOY(useradd, "<1>2u#<0G:s:g:h:SDH", TOYFLAG_NEEDROOT|TOYFLAG_UMASK|TOYFLAG_SBIN))
+USE_USERADD(OLDTOY(adduser, useradd, OPTSTR_useradd, TOYFLAG_NEEDROOT|TOYFLAG_UMASK|TOYFLAG_SBIN))
config USERADD
bool "useradd"
default n
help
- usage: useradd [-SDH] [-hDIR] [-sSHELL] [-G GRP] [-gGECOS] [-uUID] USER [GROUP]
+ usage: useradd [-SDH] [-h DIR] [-s SHELL] [-G GRP] [-g NAME] [-u UID] USER [GROUP]
Create new user, or add USER to GROUP
-
+
+ -D Don't assign a password
+ -g NAME Real name
+ -G GRP Add user to existing group
-h DIR Home directory
- -g GECOS GECOS field
+ -H Don't create home directory
-s SHELL Login shell
- -G GRP Add user to existing group
-S Create a system user
- -D Don't assign a password
- -H Don't create home directory
-u UID User id
*/
@@ -35,89 +35,51 @@ GLOBALS(
char *shell;
char *u_grp;
long uid;
+
long gid;
)
-static char* get_shell(void)
-{
- char *shell = getenv("SHELL");
-
- if (!shell) {
- struct passwd *pw;
- pw = getpwuid(getuid());
- if (pw && pw->pw_shell && pw->pw_shell[0])
- shell = pw->pw_shell;
- else shell = "/bin/sh";
- }
- return xstrdup(shell);
-}
-
-/* exec_wait() function does a fork(), and exec the command,
- * waits for the child to exit and return the status to parent
- */
-static int exec_wait(char **args)
+void useradd_main(void)
{
- int status = 0;
- pid_t pid = xfork();
+ char *s = *toys.optargs, *entry;
+ struct passwd pwd;
- if (!pid) xexec(args);
- else waitpid(pid, &status, 0);
+ // Act like groupadd?
+ if (toys.optc == 2) {
+ if (toys.optflags) {
+ toys.exithelp = 1;
+ error_exit("options with USER GROUP");
+ }
+ xexec((char *[]){"groupadd", toys.optargs[0], toys.optargs[1], 0});
+ }
- return WIFEXITED(status) ? WEXITSTATUS(status) : WTERMSIG(status)+127;
-}
+ // Sanity check user to add
+ if (strchr(s, ':') || strchr(s, '/') || strlen(s) > LOGIN_NAME_MAX)
+ error_exit("bad name");
+ // race condition: two adds at same time?
+ if (getpwnam(s)) error_exit("'%s' in use", s);
-/* create_copy_skel(), This function will create the home directory of the
- * user, by copying /etc/skel/ contents to /home/<username>.
- * Then change the ownership of home dir to the UID and GID of new user,
- * and Mode to 0700, i.e. rwx------ for user.
- */
-static void create_copy_skel(char *skel, char *hdir)
-{
- char *args[5];
- struct stat sb;
-
- if (toys.optflags & FLAG_H) return;
-
- umask(0);
- args[4] = NULL;
- if (stat(hdir, &sb)) {
- args[0] = "cp";
- args[1] = "-R";
- args[2] = skel;
- args[3] = hdir;
- // Copy /etc/skel to home dir
- toys.exitval = exec_wait(args);
-
- args[0] = "chown";
- args[1] = "-R";
- args[2] = xmprintf("%u:%u", TT.uid, TT.gid);
- args[3] = hdir;
- //Change ownership to that of UID and GID of new user
- toys.exitval = exec_wait(args);
-
- } else xprintf("Warning: home directory for the user already exists\n"
- "Not copying any file from skel directory into it.\n");
-
- if (chown(hdir, TT.uid, TT.gid) || chmod(hdir, 0700))
- perror_exit("chown/chmod failed for '%s'", hdir);
-}
+ // Add a new group to the system, if UID is given then that is validated
+ // to be free, else a free UID is choosen by self.
+ // SYSTEM IDs are considered in the range 100 ... 999
+ // add_user(), add a new entry in /etc/passwd, /etc/shadow files
-/* Add a new group to the system, if UID is given then that is validated
- * to be free, else a free UID is choosen by self.
- * SYSTEM IDs are considered in the range 100 ... 999
- * add_user(), add a new entry in /etc/passwd, /etc/shadow files
- */
-static void new_user()
-{
- struct passwd pwd;
- char *entry, *args[4];
-
- pwd.pw_name = *toys.optargs;
+ pwd.pw_name = s;
pwd.pw_passwd = "x";
- pwd.pw_gecos = (toys.optflags & FLAG_g) ? TT.gecos : "Linux User,";
- pwd.pw_dir = (toys.optflags & FLAG_h) ? TT.dir
- : xmprintf("/home/%s", *toys.optargs);
- pwd.pw_shell = (toys.optflags & FLAG_s) ? TT.shell : get_shell();
+ pwd.pw_gecos = TT.gecos ? TT.gecos : "Linux User,";
+ pwd.pw_dir = TT.dir ? TT.dir : xmprintf("/home/%s", *toys.optargs);
+
+ if (!TT.shell) {
+ TT.shell = getenv("SHELL");
+
+ if (!TT.shell) {
+ struct passwd *pw = getpwuid(getuid());
+
+ if (pw && pw->pw_shell && *pw->pw_shell) TT.shell = xstrdup(pw->pw_shell);
+ else TT.shell = "/bin/sh";
+ }
+ }
+ pwd.pw_shell = TT.shell;
if (toys.optflags & FLAG_u) {
if (TT.uid > INT_MAX) error_exit("bad uid");
@@ -141,14 +103,13 @@ static void new_user()
}
pwd.pw_gid = TT.gid;
+ // Create a new group for user
if (!(toys.optflags & FLAG_G)) {
- // Create a new group for user
- //add group, invoke addgroup command
- args[0] = "groupadd";
- args[1] = toys.optargs[0];
- args[2] = xmprintf("-g%ld", pwd.pw_gid);
- args[3] = NULL;
- if (exec_wait(args)) error_msg("addgroup fail");
+ char *s = xmprintf("-g%ld", pwd.pw_gid);
+
+ if (xrun((char *[]){"groupadd", *toys.optargs, s, 0}))
+ error_msg("addgroup -g%ld fail", pwd.pw_gid);
+ free(s);
}
/*add user to system
@@ -171,54 +132,29 @@ static void new_user()
update_password("/etc/shadow", pwd.pw_name, entry);
free(entry);
- //2. craete home dir & copy skel dir to home
- if (!(toys.optflags & FLAG_S)) create_copy_skel("/etc/skel", pwd.pw_dir);
+ // create home dir & copy skel dir to home
+ if (!(toys.optflags & (FLAG_S|FLAG_H))) {
+ char *skel = "/etc/skel", *p = pwd.pw_dir;
+
+ // Copy and change ownership
+ if (access(p, F_OK)) {
+ if (!access(skel, R_OK))
+ toys.exitval = xrun((char *[]){"cp", "-R", skel, p, 0});
+ else toys.exitval = xrun((char *[]){"mkdir", "-p", p, 0});
+ if (!toys.exitval)
+ toys.exitval |= xrun((char *[]){"chown", "-R",
+ xmprintf("%u:%u", TT.uid, TT.gid), p, 0});
+ wfchmodat(AT_FDCWD, p, 0700);
+ } else fprintf(stderr, "'%s' exists, not copying '%s'", p, skel);
+ }
//3. update the user passwd by running 'passwd' utility
- if (!(toys.optflags & FLAG_D)) {
- args[0] = "passwd";
- args[1] = pwd.pw_name;
- args[2] = NULL;
- if (exec_wait(args)) error_exit("changing user passwd failed");
- }
+ if (!(toys.optflags & FLAG_D))
+ if (xrun((char *[]){"passwd", pwd.pw_name, 0})) error_exit("passwd");
+
if (toys.optflags & FLAG_G) {
/*add user to the existing group, invoke addgroup command */
- args[0] = "groupadd";
- args[1] = toys.optargs[0];
- args[2] = TT.u_grp;
- args[3] = NULL;
- if (exec_wait(args)) error_exit("adding user to group Failed");
- }
-}
-
-/* Entry point for useradd feature
- * Specifying options and User, Group at cmdline is treated as error.
- * If only 2 parameters (Non-Option) are given, then User is added to the
- * Group
- */
-void useradd_main(void)
-{
- struct passwd *pwd = NULL;
-
- if (toys.optflags && toys.optc == 2) {
- toys.exithelp = 1;
- error_exit("options, user and group can't be together");
- }
-
- if (toys.optc == 2) {
- //add user to group
- //toys.optargs[0]- user, toys.optargs[1] - group
- char *args[4];
- args[0] = "groupadd";
- args[1] = toys.optargs[0];
- args[2] = toys.optargs[1];
- args[3] = NULL;
- toys.exitval = exec_wait(args);
- } else { //new user to be created
- // investigate the user to be created
- if ((pwd = getpwnam(*toys.optargs)))
- error_exit("user '%s' is in use", *toys.optargs);
- is_valid_username(*toys.optargs); //validate the user name
- new_user();
+ if (xrun((char *[]){"groupadd", *toys.optargs, TT.u_grp, 0}))
+ error_exit("groupadd");
}
}
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