Modules/grpmodule.c

   1 /***********************************************************
   2 Copyright 1991-1995 by Stichting Mathematisch Centrum, Amsterdam,
   3 The Netherlands.
   4
   5                         All Rights Reserved
   6
   7 Permission to use, copy, modify, and distribute this software and its
   8 documentation for any purpose and without fee is hereby granted,
   9 provided that the above copyright notice appear in all copies and that
  10 both that copyright notice and this permission notice appear in
  11 supporting documentation, and that the names of Stichting Mathematisch
  12 Centrum or CWI not be used in advertising or publicity pertaining to
  13 distribution of the software without specific, written prior permission.
  14
  15 STICHTING MATHEMATISCH CENTRUM DISCLAIMS ALL WARRANTIES WITH REGARD TO
  16 THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
  17 FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH CENTRUM BE LIABLE
  18 FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  19 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  20 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
  21 OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  22
  23 ******************************************************************/
  24
  25 /* UNIX group file access module */
  26
  27 #include "allobjects.h"
  28 #include "modsupport.h"
  29
  30 #include <sys/types.h>
  31 #include <grp.h>
  32
  33 static object *mkgrent(p)
  34         struct group *p;
  35 {
  36         object *v, *w;
  37         char **member;
  38         if ((w = newlistobject(0)) == NULL) {
  39                 return NULL;
  40         }
  41         for (member = p->gr_mem; *member != NULL; member++) {
  42                 object *x = newstringobject(*member);
  43                 if (x == NULL || addlistitem(w, x) != 0) {
  44                         XDECREF(x);
  45                         DECREF(w);
  46                         return NULL;
  47                 }
  48         }
  49         v = mkvalue("(sslO)",
  50                        p->gr_name,
  51                        p->gr_passwd,
  52 #if defined(NeXT) && defined(_POSIX_SOURCE) && defined(__LITTLE_ENDIAN__)
  53 /* Correct a bug present on Intel machines in NextStep 3.2 and 3.3;
  54    for later versions you may have to remove this */
  55                        (long)p->gr_short_pad, /* ugh-NeXT broke the padding */
  56 #else
  57                        (long)p->gr_gid,
  58 #endif
  59                        w);
  60         DECREF(w);
  61         return v;
  62 }
  63
  64 static object *grp_getgrgid(self, args)
  65         object *self, *args;
  66 {
  67         int gid;
  68         struct group *p;
  69         if (!getintarg(args, &gid))
  70                 return NULL;
  71         if ((p = getgrgid(gid)) == NULL) {
  72                 err_setstr(KeyError, "getgrgid(): gid not found");
  73                 return NULL;
  74         }
  75         return mkgrent(p);
  76 }
  77
  78 static object *grp_getgrnam(self, args)
  79         object *self, *args;
  80 {
  81         char *name;
  82         struct group *p;
  83         if (!getstrarg(args, &name))
  84                 return NULL;
  85         if ((p = getgrnam(name)) == NULL) {
  86                 err_setstr(KeyError, "getgrnam(): name not found");
  87                 return NULL;
  88         }
  89         return mkgrent(p);
  90 }
  91
  92 static object *grp_getgrall(self, args)
  93         object *self, *args;
  94 {
  95         object *d;
  96         struct group *p;
  97         if (!getnoarg(args))
  98                 return NULL;
  99         if ((d = newlistobject(0)) == NULL)
 100                 return NULL;
 101         setgrent();
 102         while ((p = getgrent()) != NULL) {
 103                 object *v = mkgrent(p);
 104                 if (v == NULL || addlistitem(d, v) != 0) {
 105                         XDECREF(v);
 106                         DECREF(d);
 107                         return NULL;
 108                 }
 109         }
 110         return d;
 111 }
 112
 113 static struct methodlist grp_methods[] = {
 114         {"getgrgid",    grp_getgrgid},
 115         {"getgrnam",    grp_getgrnam},
 116         {"getgrall",    grp_getgrall},
 117         {NULL,          NULL}           /* sentinel */
 118 };
 119
 120 void
 121 initgrp()
 122 {
 123         initmodule("grp", grp_methods);
 124 }