Mercurial > hg > octave-nkf > gnulib-hg
annotate lib/getugroups.c @ 7302:8a1a9361108c
* _fpending.c: Include <config.h> unconditionally, since we no
longer worry about uses that don't define HAVE_CONFIG_H.
* acl.c, alloca.c, argmatch.c, atexit.c, backupfile.c:
* basename.c, c-stack.c, c-strtod.c, calloc.c, canon-host.c:
* canonicalize.c, chdir-long.c, chdir-safer.c, chown.c:
* cloexec.c, close-stream.c, closeout.c, creat-safer.c:
* cycle-check.c, diacrit.c, dirchownmod.c, dirfd.c, dirname.c:
* dup-safer.c, dup2.c, error.c, euidaccess.c, exclude.c:
* exitfail.c, fchmodat.c, fchown-stub.c, fd-safer.c:
* file-type.c, fileblocks.c, filemode.c, filenamecat.c:
* fnmatch.c, fopen-safer.c, fprintftime.c, free.c, fsusage.c:
* ftruncate.c, fts-cycle.c, fts.c, full-write.c, gai_strerror.c:
* getcwd.c, getdate.y, getdomainname.c, getgroups.c:
* gethostname.c, gethrxtime.c, getloadavg.c, getlogin_r.c:
* getndelim2.c, getnline.c, getopt.c, getopt1.c, getpass.c:
* gettime.c, gettimeofday.c, getugroups.c, getusershell.c:
* glob.c, group-member.c, hard-locale.c, hash-pjw.c, hash.c:
* human.c, idcache.c, inet_ntop.c, inet_pton.c, inttostr.c:
* isdir.c, lchown.c, linebuffer.c, long-options.c, lstat.c:
* malloc.c, md5.c, memcasecmp.c, memchr.c, memcmp.c, memcoll.c:
* memcpy.c, memmove.c, memrchr.c, mkancesdirs.c, mkdir-p.c:
* mkdir.c, mkdirat.c, mkstemp-safer.c, mkstemp.c, modechange.c:
* mountlist.c, nanosleep.c, obstack.c, open-safer.c:
* openat-die.c, openat.c, pagealign_alloc.c, physmem.c:
* pipe-safer.c, posixtm.c, posixver.c, putenv.c, quote.c:
* quotearg.c, raise.c, readtokens.c, readtokens0.c, readutmp.c:
* realloc.c, regex.c, rename.c, rmdir.c, rpmatch.c, safe-read.c:
* same.c, save-cwd.c, savedir.c, setenv.c, settime.c, sha1.c:
* sig2str.c, snprintf.c, strdup.c, strerror.c, strftime.c:
* stripslash.c, strndup.c, strnlen.c, strpbrk.c, strtod.c:
* strtoimax.c, strtol.c, strverscmp.c, tempname.c, time_r.c:
* timegm.c, tmpfile-safer.c, unlinkdir.c, userspec.c, utime.c:
* utimecmp.c, utimens.c, version-etc-fsf.c, version-etc.c:
* xalloc-die.c, xgetcwd.c, xgethostname.c, xmalloc.c:
* xmemcoll.c, xnanosleep.c, xreadlink.c, xstrtod.c:
* xstrtoimax.c, xstrtol.c, xstrtoumax.c, yesno.c:
Likewise.
| author | Paul Eggert <eggert@cs.ucla.edu> |
|---|---|
| date | Wed, 13 Sep 2006 22:38:14 +0000 |
| parents | 211a3b19d9ef |
| children | c69012fcd861 |
| rev | line source |
|---|---|
| 9 | 1 /* getugroups.c -- return a list of the groups a user is in |
| 5159 | 2 |
|
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3 Copyright (C) 1990, 1991, 1998, 1999, 2000, 2003, 2004, 2005, 2006 |
|
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4 Free Software Foundation. |
| 9 | 5 |
| 6 This program is free software; you can redistribute it and/or modify | |
| 7 it under the terms of the GNU General Public License as published by | |
| 8 the Free Software Foundation; either version 2, or (at your option) | |
| 9 any later version. | |
| 10 | |
| 11 This program is distributed in the hope that it will be useful, | |
| 12 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 14 GNU General Public License for more details. | |
| 15 | |
| 16 You should have received a copy of the GNU General Public License | |
|
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17 along with this program; if not, write to the Free Software Foundation, |
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18 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ |
| 9 | 19 |
| 20 /* Written by David MacKenzie. */ | |
| 21 | |
|
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22 #include <config.h> |
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23 |
| 9 | 24 #include <sys/types.h> |
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25 #include <stdio.h> /* grp.h on alpha OSF1 V2.0 uses "FILE *". */ |
| 9 | 26 #include <grp.h> |
| 27 | |
| 6275 | 28 #include <unistd.h> |
| 9 | 29 |
| 5159 | 30 #include <errno.h> |
| 31 #ifndef EOVERFLOW | |
| 32 # define EOVERFLOW EINVAL | |
| 33 #endif | |
| 34 | |
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35 /* Some old header files might not declare setgrent, getgrent, and endgrent. |
| 9 | 36 If you don't have them at all, we can't implement this function. |
| 37 You lose! */ | |
| 38 struct group *getgrent (); | |
| 39 | |
| 4654 | 40 #include <string.h> |
| 9 | 41 |
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42 #define STREQ(s1, s2) ((strcmp (s1, s2) == 0)) |
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43 |
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44 /* Like `getgroups', but for user USERNAME instead of for the current |
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45 process. Store at most MAXCOUNT group IDs in the GROUPLIST array. |
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46 If GID is not -1, store it first (if possible). GID should be the |
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47 group ID (pw_gid) obtained from getpwuid, in case USERNAME is not |
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48 listed in /etc/groups. |
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49 Always return the number of groups of which USERNAME is a member. */ |
| 9 | 50 |
| 51 int | |
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52 getugroups (int maxcount, GETGROUPS_T *grouplist, char *username, gid_t gid) |
| 9 | 53 { |
| 54 struct group *grp; | |
| 55 register char **cp; | |
| 56 register int count = 0; | |
| 57 | |
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58 if (gid != (gid_t) -1) |
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59 { |
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60 if (maxcount != 0) |
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61 grouplist[count] = gid; |
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62 ++count; |
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63 } |
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64 |
| 9 | 65 setgrent (); |
| 66 while ((grp = getgrent ()) != 0) | |
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67 { |
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68 for (cp = grp->gr_mem; *cp; ++cp) |
| 9 | 69 { |
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70 int n; |
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71 |
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72 if ( ! STREQ (username, *cp)) |
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73 continue; |
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74 |
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75 /* See if this group number is already on the list. */ |
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76 for (n = 0; n < count; ++n) |
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77 if (grouplist && grouplist[n] == grp->gr_gid) |
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78 break; |
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79 |
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80 /* If it's a new group number, then try to add it to the list. */ |
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81 if (n == count) |
| 9 | 82 { |
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83 if (maxcount != 0) |
| 9 | 84 { |
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85 if (count >= maxcount) |
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86 { |
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87 endgrent (); |
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88 return count; |
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89 } |
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90 grouplist[count] = grp->gr_gid; |
| 9 | 91 } |
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92 count++; |
| 5159 | 93 if (count < 0) |
| 94 { | |
| 95 errno = EOVERFLOW; | |
| 96 return -1; | |
| 97 } | |
| 9 | 98 } |
| 99 } | |
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100 } |
| 9 | 101 endgrent (); |
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102 |
| 9 | 103 return count; |
| 104 } |