Mercurial > hg > octave-kai > gnulib-hg
annotate lib/getgroups.c @ 5948:f410a15537e7
(make_dir_parents): Don't apply sizeof to a hard-coded type name.
Use the variable name instead.
| author | Jim Meyering <jim@meyering.net> |
|---|---|
| date | Wed, 29 Jun 2005 21:28:00 +0000 |
| parents | a48fb0e98c8c |
| children | 96c32553b4c6 |
| rev | line source |
|---|---|
| 818 | 1 /* provide consistent interface to getgroups for systems that don't allow N==0 |
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Include "xalloc.h" instead of declaring xalloc fns; from Dmitry V. Levin.
Paul Eggert <eggert@cs.ucla.edu>
parents:
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2 Copyright (C) 1996, 1999, 2003 Free Software Foundation, Inc. |
| 818 | 3 |
| 4 This program is free software; you can redistribute it and/or modify | |
| 5 it under the terms of the GNU General Public License as published by | |
| 6 the Free Software Foundation; either version 2, or (at your option) | |
| 7 any later version. | |
| 8 | |
| 9 This program is distributed in the hope that it will be useful, | |
| 10 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 12 GNU General Public License for more details. | |
| 13 | |
| 14 You should have received a copy of the GNU General Public License | |
| 15 along with this program; if not, write to the Free Software Foundation, | |
|
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Paul Eggert <eggert@cs.ucla.edu>
parents:
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16 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ |
| 818 | 17 |
| 18 /* written by Jim Meyering */ | |
| 19 | |
| 20 #include <config.h> | |
| 21 #include <stdio.h> | |
| 22 #include <sys/types.h> | |
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Include <errno.h>, <stdlib.h>.
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23 #include <errno.h> |
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ac6111c4f643
Include <errno.h>, <stdlib.h>.
Paul Eggert <eggert@cs.ucla.edu>
parents:
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24 #include <stdlib.h> |
| 818 | 25 |
|
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66dca1409f3e
Include "xalloc.h" instead of declaring xalloc fns; from Dmitry V. Levin.
Paul Eggert <eggert@cs.ucla.edu>
parents:
2807
diff
changeset
|
26 #include "xalloc.h" |
| 818 | 27 |
| 834 | 28 /* On at least Ultrix 4.3 and NextStep 3.2, getgroups (0, 0) always fails. |
| 29 On other systems, it returns the number of supplemental groups for the | |
| 1732 | 30 process. This function handles that special case and lets the system- |
| 31 provided function handle all others. */ | |
| 818 | 32 |
| 33 int | |
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parents:
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34 getgroups (int n, GETGROUPS_T *group) |
| 818 | 35 { |
| 834 | 36 int n_groups; |
| 818 | 37 GETGROUPS_T *gbuf; |
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parents:
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38 int saved_errno; |
| 818 | 39 |
| 40 #undef getgroups | |
| 41 | |
| 42 if (n != 0) | |
| 43 return getgroups (n, group); | |
| 44 | |
| 45 n = 20; | |
| 46 while (1) | |
| 47 { | |
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parents:
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48 /* No need to worry about address arithmetic overflow here, |
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parents:
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diff
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49 since the ancient systems that we're running on have low |
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ac6111c4f643
Include <errno.h>, <stdlib.h>.
Paul Eggert <eggert@cs.ucla.edu>
parents:
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diff
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50 limits on the number of secondary groups. */ |
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* getgroups.c (getgroups): xmalloc takes one argument, not two.
Paul Eggert <eggert@cs.ucla.edu>
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51 gbuf = xmalloc (n * sizeof *gbuf); |
| 834 | 52 n_groups = getgroups (n, gbuf); |
| 53 if (n_groups < n) | |
| 818 | 54 break; |
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(getgroups): Don't use xrealloc, since we don't need the buffer
Paul Eggert <eggert@cs.ucla.edu>
parents:
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55 free (gbuf); |
| 818 | 56 n += 10; |
| 57 } | |
| 58 | |
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parents:
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59 saved_errno = errno; |
| 818 | 60 free (gbuf); |
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parents:
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61 errno = saved_errno; |
| 818 | 62 |
| 834 | 63 return n_groups; |
| 818 | 64 } |