141 lines
2.8 KiB
C
141 lines
2.8 KiB
C
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/* @(#)getgrent.c 1.1 11/07/12 Copyright 2011 J. Schilling */
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/*
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* Group functions for platforms (like MINGW) that do not have them.
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*
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* Copyright (c) 2011 J. Schilling
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*/
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/*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License, Version 1.0 only
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* (the "License"). You may not use this file except in compliance
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* with the License.
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*
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* See the file CDDL.Schily.txt in this distribution for details.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file CDDL.Schily.txt from this distribution.
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*/
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#include <schily/stdio.h>
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#include <schily/grp.h>
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#include <schily/standard.h>
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#include <schily/utypes.h>
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#include <schily/schily.h>
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#if !defined(HAVE_GETGRNAM) && !defined(HAVE_GETGRENT) && \
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!defined(HAVE_GETGRGID) && !defined(HAVE_SETGRENT) && \
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!defined(HAVE_ENDGRENT)
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LOCAL FILE *grpf;
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LOCAL char *list[16+1];
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LOCAL struct group grp;
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LOCAL struct group rootgrp = { "root", "*", 0, list };
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LOCAL char grpbuf[128];
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LOCAL struct group *mkgrp __PR((char *arr[]));
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LOCAL struct group *findgrent __PR((const char *string, int field));
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EXPORT struct group *
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getgrent()
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{
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char *arr[7];
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if (grpf == (FILE *)NULL) {
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grpf = fileopen("/etc/group", "r");
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if (grpf == (FILE *)NULL)
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return ((struct group *)0);
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}
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if (fgetline(grpf, grpbuf, sizeof (grpbuf)) == EOF)
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return ((struct group *)0);
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breakline(grpbuf, ':', arr, 7);
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return (mkgrp(arr));
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}
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EXPORT void
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setgrent()
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{
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if (grpf == (FILE *)NULL) {
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grpf = fileopen("/etc/group", "r");
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if (grpf == (FILE *)NULL)
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return;
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}
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fileseek(grpf, (off_t)0);
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}
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EXPORT void
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endgrent()
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{
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if (grpf != (FILE *)NULL) {
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fclose(grpf);
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grpf = (FILE *)NULL;
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}
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}
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EXPORT struct group *
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getgrnam(name)
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const char *name;
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{
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setgrent();
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if (grpf == (FILE *)NULL) {
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list[0] = NULL;
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if (streql(rootgrp.gr_name, name))
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return (&rootgrp);
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return ((struct group *)0);
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}
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return (findgrent(name, 0));
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}
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EXPORT struct group *
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getgrgid(gid)
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gid_t gid;
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{
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char sgid[32];
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setgrent();
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if (grpf == (FILE *)NULL) {
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list[0] = NULL;
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if (gid == 0)
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return (&rootgrp);
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return ((struct group *)0);
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}
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js_snprintf(sgid, sizeof (sgid), "%lld", (Llong)gid);
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return (findgrent(sgid, 2));
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}
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LOCAL struct group *
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mkgrp(arr)
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char *arr[];
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{
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long l;
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grp.gr_name = arr[0];
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grp.gr_passwd = arr[1];
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(void) astolb(arr[2], &l, 10);
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grp.gr_gid = l;
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l = breakline(arr[3], ',', list, 16);
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list[l] = NULL;
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if (list[0][0] == '\0')
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list[0] = NULL;
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grp.gr_mem = list;
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return (&grp);
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}
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LOCAL struct group *
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findgrent(string, field)
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const char *string;
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int field;
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{
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char *arr[7];
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for (;;) {
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if (fgetline(grpf, grpbuf, sizeof (grpbuf)) == EOF)
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return ((struct group *)0);
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breakline(grpbuf, ':', arr, 7);
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if (streql(string, arr[field]))
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return (mkgrp(arr));
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}
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}
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#endif
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