Mercurial > hg > octave-kai > gnulib-hg
annotate lib/xgetcwd.c @ 650:b4ef1c1a0171
update FSF address in copyright
| author | Jim Meyering <jim@meyering.net> |
|---|---|
| date | Mon, 15 Jul 1996 03:36:16 +0000 |
| parents | 8bc57d4e2dd4 |
| children | b63f146fd963 |
| rev | line source |
|---|---|
| 212 | 1 /* xgetcwd.c -- return current directory with unlimited length |
| 2 Copyright (C) 1992 Free Software Foundation, Inc. | |
| 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 | |
|
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b4ef1c1a0171
update FSF address in copyright
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parents:
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15 along with this program; if not, write to the Free Software Foundation, |
|
b4ef1c1a0171
update FSF address in copyright
Jim Meyering <jim@meyering.net>
parents:
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16 Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
| 212 | 17 |
|
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b4ef1c1a0171
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parents:
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changeset
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18 /* Written by David MacKenzie <djm@gnu.ai.mit.edu>. */ |
| 212 | 19 |
| 20 #ifdef HAVE_CONFIG_H | |
| 21 #include <config.h> | |
| 22 #endif | |
| 23 | |
| 24 #include <stdio.h> | |
| 25 #include <errno.h> | |
| 26 #ifndef errno | |
| 27 extern int errno; | |
| 28 #endif | |
| 29 #include <sys/types.h> | |
| 30 #include "pathmax.h" | |
| 31 | |
|
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update FSF address in copyright
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parents:
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32 #ifndef HAVE_GETCWD |
| 212 | 33 char *getwd (); |
| 34 #define getcwd(buf, max) getwd (buf) | |
| 35 #else | |
| 36 char *getcwd (); | |
| 37 #endif | |
| 38 | |
| 39 /* Amount to increase buffer size by in each try. */ | |
| 40 #define PATH_INCR 32 | |
| 41 | |
| 42 char *xmalloc (); | |
| 43 char *xrealloc (); | |
| 44 void free (); | |
| 45 | |
| 46 /* Return the current directory, newly allocated, arbitrarily long. | |
| 47 Return NULL and set errno on error. */ | |
| 48 | |
| 49 char * | |
| 50 xgetcwd () | |
| 51 { | |
| 52 char *cwd; | |
| 53 char *ret; | |
| 54 unsigned path_max; | |
| 55 | |
| 56 errno = 0; | |
| 57 path_max = (unsigned) PATH_MAX; | |
| 58 path_max += 2; /* The getcwd docs say to do this. */ | |
| 59 | |
| 60 cwd = xmalloc (path_max); | |
| 61 | |
| 62 errno = 0; | |
| 63 while ((ret = getcwd (cwd, path_max)) == NULL && errno == ERANGE) | |
| 64 { | |
| 65 path_max += PATH_INCR; | |
| 66 cwd = xrealloc (cwd, path_max); | |
| 67 errno = 0; | |
| 68 } | |
| 69 | |
| 70 if (ret == NULL) | |
| 71 { | |
| 72 int save_errno = errno; | |
| 73 free (cwd); | |
| 74 errno = save_errno; | |
| 75 return NULL; | |
| 76 } | |
| 77 return cwd; | |
| 78 } |