From 18ec03543c3731e1ea25182ef72c49ac5ec2d1c7 Mon Sep 17 00:00:00 2001
From: Rob Landley <rob@landley.net>
Date: Wed, 16 Oct 2013 20:41:56 -0500
Subject: useradd, groupadd, and mkpasswd submitted by Ashwini Sharma.

---
 toys/pending/groupadd.c | 113 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 113 insertions(+)
 create mode 100644 toys/pending/groupadd.c

(limited to 'toys/pending/groupadd.c')

diff --git a/toys/pending/groupadd.c b/toys/pending/groupadd.c
new file mode 100644
index 00000000..ab290e54
--- /dev/null
+++ b/toys/pending/groupadd.c
@@ -0,0 +1,113 @@
+/* groupadd.c - create a new group
+ *
+ * Copyright 2013 Ashwini Kumar <ak.ashwini@gmail.com>
+ * Copyright 2013 Kyungwan Han <asura321@gmail.com>
+ *
+ * See http://refspecs.linuxfoundation.org/LSB_4.1.0/LSB-Core-generic/LSB-Core-generic/groupadd.html
+
+USE_GROUPADD(NEWTOY(groupadd, "<1>2g#<0S", TOYFLAG_NEEDROOT|TOYFLAG_SBIN))
+USE_GROUPADD(OLDTOY(addgroup, groupadd, OPTSTR_groupadd, TOYFLAG_NEEDROOT|TOYFLAG_SBIN))
+
+config GROUPADD
+  bool "groupadd"
+  default n
+  help
+    usage: groupadd [-S] [-g GID] [USER] GROUP
+
+    Add a group or add a user to a group
+    
+      -g GID Group id
+      -S     Create a system group
+*/
+
+#define FOR_groupadd
+#include "toys.h"
+
+#define GROUP_PATH        "/etc/group"
+#define SECURE_GROUP_PATH "/etc/gshadow"
+
+GLOBALS(
+  long gid;
+)
+
+/* Add a new group to the system, if GID is given then that is validated
+ * to be free, else a free GID is choosen by self.
+ * SYSTEM IDs are considered in the range 100 ... 999
+ * update_group(), updates the entries in /etc/group, /etc/gshadow files
+ */
+static void new_group()
+{
+  char *entry = NULL;
+  int max = INT_MAX;
+
+  if (toys.optflags & FLAG_g) {
+    if (TT.gid > INT_MAX) error_exit("gid should be less than  '%d' ", INT_MAX);
+    if (getgrgid(TT.gid)) error_exit("group '%ld' is in use", TT.gid);
+  } else {
+    if (toys.optflags & FLAG_S) {
+      TT.gid = SYS_FIRST_ID;
+      max = SYS_LAST_ID;
+    } else {
+      TT.gid = SYS_LAST_ID + 1; //i.e. starting from 1000
+      max = 60000; // as per config file on Linux desktop
+    }
+    //find unused gid
+    while (TT.gid <= max) {
+      if (!getgrgid(TT.gid)) break;
+      if (TT.gid == max) error_exit("no more free gids left");
+      TT.gid++;
+    }
+  }
+
+  entry = xmsprintf("%s:%s:%d:", *toys.optargs, "x", TT.gid);
+  update_password(GROUP_PATH, *toys.optargs, entry);
+  free(entry);
+  entry = xmsprintf("%s:%s::", *toys.optargs, "!");
+  update_password(SECURE_GROUP_PATH, *toys.optargs, entry);
+  free(entry);
+}
+
+void groupadd_main(void)
+{
+  struct group *grp = NULL;
+  char *entry = 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
+    if (!getpwnam(toys.optargs[0])) 
+      error_exit("user '%s' does not exist", toys.optargs[0]);
+    if (!(grp = getgrnam(toys.optargs[1]))) 
+      error_exit("group '%s' does not exist", toys.optargs[1]);
+    if (!grp->gr_mem) entry = xmsprintf("%s", *toys.optargs);
+    else {
+      int i;
+
+      for (i = 0; grp->gr_mem[i]; i++)
+        if (!strcmp(grp->gr_mem[i], *toys.optargs)) return;
+
+      entry = xstrdup("");
+      for (i=0; grp->gr_mem[i]; i++) {
+        entry = xrealloc(entry, strlen(entry) + strlen(grp->gr_mem[i]) + 2);
+        strcat(entry, grp->gr_mem[i]);
+        strcat(entry, ",");
+      }
+      entry = xrealloc(entry, strlen(entry) + strlen(*toys.optargs) + 1);
+      strcat(entry, *toys.optargs);
+    }
+    update_password(GROUP_PATH, grp->gr_name, entry);
+    update_password(SECURE_GROUP_PATH, grp->gr_name, entry);
+    free(entry);
+  } else {    //new group to be created
+    /* investigate the group to be created */
+    if ((grp = getgrnam(*toys.optargs))) 
+      error_exit("group '%s' is in use", *toys.optargs);
+    setlocale(LC_ALL, "C");
+    is_valid_username(*toys.optargs);
+    new_group();
+  }
+}
-- 
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