LXR toybox/toys/pending/groupadd.c

   1/* groupadd.c - create a new group
   2 *
   3 * Copyright 2013 Ashwini Kumar <ak.ashwini@gmail.com>
   4 * Copyright 2013 Kyungwan Han <asura321@gmail.com>
   5 *
   6 * See http://refspecs.linuxfoundation.org/LSB_4.1.0/LSB-Core-generic/LSB-Core-generic/groupadd.html
   7
   8USE_GROUPADD(NEWTOY(groupadd, "<1>2g#<0S", TOYFLAG_NEEDROOT|TOYFLAG_SBIN))
   9USE_GROUPADD(OLDTOY(addgroup, groupadd, TOYFLAG_NEEDROOT|TOYFLAG_SBIN))
  10
  11config GROUPADD
  12  bool "groupadd"
  13  default n
  14  help
  15    usage: groupadd [-S] [-g GID] [USER] GROUP
  16
  17    Add a group or add a user to a group
  18    
  19      -g GID Group id
  20      -S     Create a system group
  21*/
  22
  23#define FOR_groupadd
  24#include "toys.h"
  25
  26#define GROUP_PATH        "/etc/group"
  27#define SECURE_GROUP_PATH "/etc/gshadow"
  28
  29GLOBALS(
  30  long gid;
  31)
  32
  33/* Add a new group to the system, if GID is given then that is validated
  34 * to be free, else a free GID is choosen by self.
  35 * SYSTEM IDs are considered in the range 100 ... 999
  36 * update_group(), updates the entries in /etc/group, /etc/gshadow files
  37 */
  38static void new_group()
  39{
  40  char *entry = NULL;
  41
  42  if (FLAG(g)) {
  43    if (TT.gid > INT_MAX) error_exit("gid should be less than  '%d' ", INT_MAX);
  44    if (getgrgid(TT.gid)) error_exit("group '%ld' is in use", TT.gid);
  45  } else {
  46    if (FLAG(S)) TT.gid = CFG_TOYBOX_UID_SYS;
  47    else TT.gid = CFG_TOYBOX_UID_USR;
  48    //find unused gid
  49    while (getgrgid(TT.gid)) TT.gid++;
  50  }
  51
  52  entry = xmprintf("%s:%s:%ld:", *toys.optargs, "x", TT.gid);
  53  update_password(GROUP_PATH, *toys.optargs, entry);
  54  free(entry);
  55  entry = xmprintf("%s:%s::", *toys.optargs, "!");
  56  update_password(SECURE_GROUP_PATH, *toys.optargs, entry);
  57  free(entry);
  58}
  59
  60void groupadd_main(void)
  61{
  62  struct group *grp = NULL;
  63  char *entry = NULL;
  64
  65  if (toys.optflags && toys.optc == 2)
  66    help_exit("options, user and group can't be together");
  67
  68  if (toys.optc == 2) {  //add user to group
  69    //toys.optargs[0]- user, toys.optargs[1] - group
  70    xgetpwnam(*toys.optargs);
  71    if (!(grp = getgrnam(toys.optargs[1]))) 
  72      error_exit("group '%s' does not exist", toys.optargs[1]);
  73    if (!grp->gr_mem) entry = xmprintf("%s", *toys.optargs);
  74    else {
  75      int i;
  76
  77      for (i = 0; grp->gr_mem[i]; i++)
  78        if (!strcmp(grp->gr_mem[i], *toys.optargs)) return;
  79
  80      entry = xstrdup("");
  81      for (i=0; grp->gr_mem[i]; i++) {
  82        entry = xrealloc(entry, strlen(entry) + strlen(grp->gr_mem[i]) + 2);
  83        strcat(entry, grp->gr_mem[i]);
  84        strcat(entry, ",");
  85      }
  86      entry = xrealloc(entry, strlen(entry) + strlen(*toys.optargs) + 1);
  87      strcat(entry, *toys.optargs);
  88    }
  89    update_password(GROUP_PATH, grp->gr_name, entry);
  90    update_password(SECURE_GROUP_PATH, grp->gr_name, entry);
  91    free(entry);
  92  } else {    //new group to be created
  93    char *s = *toys.optargs;
  94
  95    /* investigate the group to be created */
  96    if (getgrnam(s)) error_exit("'%s' in use", s);
  97    if (s[strcspn(s, ":/\n")] || strlen(s) > LOGIN_NAME_MAX)
  98      error_exit("bad name");
  99    new_group();
 100  }
 101}
 102