Last change
on this file since 1316 was 821, checked in by Bruno Cornec, 18 years ago |
Addition of busybox 1.2.1 as a mindi-busybox new package
This should avoid delivering binary files in mindi not built there (Fedora and Debian are quite serious about that)
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File size:
1.1 KB
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Rev | Line | |
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[821] | 1 | /*
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| 2 | * xgetcwd.c -- return current directory with unlimited length
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| 3 | * Copyright (C) 1992, 1996 Free Software Foundation, Inc.
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| 4 | * Written by David MacKenzie <djm@gnu.ai.mit.edu>.
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| 5 | *
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| 6 | * Special function for busybox written by Vladimir Oleynik <dzo@simtreas.ru>
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| 7 | */
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| 8 |
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| 9 | #include <stdlib.h>
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| 10 | #include <errno.h>
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| 11 | #include <unistd.h>
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| 12 | #include <limits.h>
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| 13 | #include <sys/param.h>
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| 14 | #include "libbb.h"
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| 15 |
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| 16 | /* Amount to increase buffer size by in each try. */
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| 17 | #define PATH_INCR 32
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| 18 |
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| 19 | /* Return the current directory, newly allocated, arbitrarily long.
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| 20 | Return NULL and set errno on error.
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| 21 | If argument is not NULL (previous usage allocate memory), call free()
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| 22 | */
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| 23 |
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| 24 | char *
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| 25 | xgetcwd (char *cwd)
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| 26 | {
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| 27 | char *ret;
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| 28 | unsigned path_max;
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| 29 |
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| 30 | path_max = (unsigned) PATH_MAX;
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| 31 | path_max += 2; /* The getcwd docs say to do this. */
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| 32 |
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| 33 | if(cwd==0)
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| 34 | cwd = xmalloc (path_max);
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| 35 |
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| 36 | while ((ret = getcwd (cwd, path_max)) == NULL && errno == ERANGE) {
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| 37 | path_max += PATH_INCR;
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| 38 | cwd = xrealloc (cwd, path_max);
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| 39 | }
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| 40 |
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| 41 | if (ret == NULL) {
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| 42 | free (cwd);
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| 43 | bb_perror_msg("getcwd()");
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| 44 | return NULL;
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| 45 | }
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| 46 |
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| 47 | return cwd;
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| 48 | }
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