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Commit | Line | Data |
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28e9041c | 1 | /* Emulate getcwd using getwd. |
2 | This function is in the public domain. */ | |
3 | ||
4 | /* | |
28e9041c | 5 | |
614a23c6 | 6 | @deftypefn Supplemental char* getcwd (char *@var{pathname}, @var{len}) |
28e9041c | 7 | |
614a23c6 | 8 | Copy the absolute pathname for the current working directory into |
9 | @var{pathname}, which is assumed to point to a buffer of at least | |
10 | @var{len} bytes, and return a pointer to the buffer. If the current | |
11 | directory's path doesn't fit in @var{len} characters, the result is | |
12 | NULL and @var{errno} is set. If @var{pathname} is a null pointer, | |
13 | @code{getcwd} will obtain @var{len} bytes of space using | |
14 | @code{malloc}. | |
28e9041c | 15 | |
614a23c6 | 16 | @end deftypefn |
28e9041c | 17 | |
18 | */ | |
19 | ||
3c67ba63 | 20 | #include "config.h" |
21 | ||
22 | #ifdef HAVE_SYS_PARAM_H | |
28e9041c | 23 | #include <sys/param.h> |
24 | #endif | |
25 | #include <errno.h> | |
98b4c197 | 26 | #ifdef HAVE_STRING_H |
27 | #include <string.h> | |
28 | #endif | |
29 | #ifdef HAVE_STDLIB_H | |
30 | #include <stdlib.h> | |
31 | #endif | |
28e9041c | 32 | |
33 | extern char *getwd (); | |
34 | extern int errno; | |
35 | ||
36 | #ifndef MAXPATHLEN | |
37 | #define MAXPATHLEN 1024 | |
38 | #endif | |
39 | ||
40 | char * | |
41 | getcwd (buf, len) | |
42 | char *buf; | |
43 | int len; | |
44 | { | |
45 | char ourbuf[MAXPATHLEN]; | |
46 | char *result; | |
47 | ||
48 | result = getwd (ourbuf); | |
49 | if (result) { | |
50 | if (strlen (ourbuf) >= len) { | |
51 | errno = ERANGE; | |
52 | return 0; | |
53 | } | |
4f1b64a0 | 54 | if (!buf) { |
55 | buf = (char*)malloc(len); | |
56 | if (!buf) { | |
57 | errno = ENOMEM; | |
58 | return 0; | |
59 | } | |
60 | } | |
28e9041c | 61 | strcpy (buf, ourbuf); |
62 | } | |
63 | return buf; | |
64 | } |