Mercurial > gnulib
changeset 242:dd49a02a9f1c
GNU shell utilities
author | Jim Meyering <jim@meyering.net> |
---|---|
date | Tue, 26 Jul 1994 03:44:47 +0000 |
parents | a19e9d12945f |
children | 5a2941575897 |
files | lib/group-member.c lib/group-member.h lib/mktime.c |
diffstat | 3 files changed, 179 insertions(+), 5 deletions(-) [+] |
line wrap: on
line diff
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/lib/group-member.c Tue Jul 26 03:44:47 1994 +0000 @@ -0,0 +1,158 @@ +/* group-member.c -- determine whether group id is in calling user's group list + Copyright (C) 1994 Free Software Foundation, Inc. + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2, or (at your option) + any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ + +#ifdef HAVE_CONFIG_H +#if defined (CONFIG_BROKETS) +/* We use <config.h> instead of "config.h" so that a compilation + using -I. -I$srcdir will use ./config.h rather than $srcdir/config.h + (which it would do because it found this file in $srcdir). */ +#include <config.h> +#else +#include "config.h" +#endif +#endif + +#include <stdio.h> +#include <sys/types.h> + +#ifdef STDC_HEADERS +#include <stdlib.h> +#endif + +#ifdef HAVE_UNISTD_H +#include <unistd.h> +#endif + +#include "group-member.h" + +char *xmalloc (); +char *xrealloc (); + +struct group_info + { + int n_groups; + GETGROUPS_T *group; + }; + +#ifdef HAVE_GETGROUPS + +static void +free_group_info (g) + struct group_info *g; +{ + free (g->group); + free (g); +} + +static struct group_info * +get_group_info () +{ + int n_groups; + int n_group_slots; + struct group_info *gi; + GETGROUPS_T *group; + + /* getgroups () returns the number of elements that it was able to + place into the array. We simply continue to call getgroups () + until the number of elements placed into the array is smaller than + the physical size of the array. */ + + group = NULL; + n_groups = 0; + n_group_slots = 0; + while (n_groups == n_group_slots) + { + n_group_slots += 64; + group = (GETGROUPS_T *) xrealloc (group, + n_group_slots * sizeof (GETGROUPS_T)); + n_groups = getgroups (n_group_slots, group); + } + + /* In case of error, the user loses. */ + if (n_groups < 0) + { + free (group); + return NULL; + } + + gi = (struct group_info *) xmalloc (sizeof (*gi)); + gi->n_groups = n_groups; + gi->group = group; + + return gi; +} + +#endif /* not HAVE_GETGROUPS */ + +/* Return non-zero if GID is one that we have in our groups list. + If there is no getgroups function, return non-zero if GID matches + either of the current or effective group IDs. */ + +int +group_member (gid) + gid_t gid; +{ +#ifndef HAVE_GETGROUPS + return ((gid == getgid ()) || (gid == getegid ())); +#else + int i; + int found; + struct group_info *gi; + + gi = get_group_info (); + if (gi == NULL) + return 0; + + /* Search through the list looking for GID. */ + found = 0; + for (i = 0; i < gi->n_groups; i++) + { + if (gid == gi->group[i]) + { + found = 1; + break; + } + } + + free_group_info (gi); + + return found; +#endif /* HAVE_GETGROUPS */ +} + +#ifdef TEST + +char *program_name; + +int +main (int argc, char** argv) +{ + int i; + + program_name = argv[0]; + + for (i=1; i<argc; i++) + { + gid_t gid; + + gid = atoi (argv[i]); + printf ("%d: %s\n", gid, group_member (gid) ? "yes" : "no"); + } + exit (0); +} + +#endif /* TEST */
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/lib/group-member.h Tue Jul 26 03:44:47 1994 +0000 @@ -0,0 +1,7 @@ +#ifndef _group_member_h_ +#define _group_member_h_ 1 + +int + group_member (); + +#endif /* _group_member_h_ */
--- a/lib/mktime.c Tue Jul 05 02:15:46 1994 +0000 +++ b/lib/mktime.c Tue Jul 26 03:44:47 1994 +0000 @@ -1,5 +1,6 @@ /* Copyright (C) 1993, 1994 Free Software Foundation, Inc. - Contributed by Noel Cragg (noel@cs.oberlin.edu). + Contributed by Noel Cragg (noel@cs.oberlin.edu), with fixes + by Michael E. Calwas (calwas@ttd.teradyne.com). This file is part of the GNU C Library. @@ -226,12 +227,12 @@ while (me->foo < x) \ { \ me->bar--; \ - me->foo = (y - (x - me->foo)); \ + me->foo = (y - (x - me->foo) + 1); \ } \ while (me->foo > y) \ { \ + me->foo = (x + (me->foo - y) - 1); \ me->bar++; \ - me->foo = (x + (me->foo - y)); \ } normalize (tm_sec, 0, 59, tm_min); @@ -240,8 +241,14 @@ /* Do the month first, so day range can be found. */ normalize (tm_mon, 0, 11, tm_year); + + /* Since the day range modifies the month, we should be careful how + we reference the array of month lengths -- it is possible that + the month will go negative, hence the %... */ normalize (tm_mday, 1, - __mon_lengths[__isleap (me->tm_year)][me->tm_mon], + __mon_lengths[__isleap (me->tm_year)][((me->tm_mon < 0) + ? (12 + (me->tm_mon % 12)) + : (me->tm_mon % 12)) ], tm_mon); /* Do the month again, because the day may have pushed it out of range. */ @@ -249,7 +256,9 @@ /* Do the day again, because the month may have changed the range. */ normalize (tm_mday, 1, - __mon_lengths[__isleap (me->tm_year)][me->tm_mon], + __mon_lengths[__isleap (me->tm_year)][((me->tm_mon < 0) + ? (12 + (me->tm_mon % 12)) + : (me->tm_mon % 12)) ], tm_mon); #ifdef DEBUG