1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
|
/***********************************************************
Copyright (c) 2000, BeOpen.com.
Copyright (c) 1995-2000, Corporation for National Research Initiatives.
Copyright (c) 1990-1995, Stichting Mathematisch Centrum.
All rights reserved.
See the file "Misc/COPYRIGHT" for information on usage and
redistribution of this file, and for a DISCLAIMER OF ALL WARRANTIES.
******************************************************************/
/* Two PD getcwd() implementations.
Author: Guido van Rossum, CWI Amsterdam, Jan 1991, <guido@cwi.nl>. */
#include <stdio.h>
#include <errno.h>
#ifdef HAVE_GETWD
/* Version for BSD systems -- use getwd() */
#ifdef HAVE_SYS_PARAM_H
#include <sys/param.h>
#endif
#ifndef MAXPATHLEN
#define MAXPATHLEN 1024
#endif
extern char *getwd(char *);
char *
getcwd(char *buf, int size)
{
char localbuf[MAXPATHLEN+1];
char *ret;
if (size <= 0) {
errno = EINVAL;
return NULL;
}
ret = getwd(localbuf);
if (ret != NULL && strlen(localbuf) >= (size_t)size) {
errno = ERANGE;
return NULL;
}
if (ret == NULL) {
errno = EACCES; /* Most likely error */
return NULL;
}
strncpy(buf, localbuf, size);
return buf;
}
#else /* !HAVE_GETWD */
/* Version for really old UNIX systems -- use pipe from pwd */
#ifndef PWD_CMD
#define PWD_CMD "/bin/pwd"
#endif
char *
getcwd(char *buf, int size)
{
FILE *fp;
char *p;
int sts;
if (size <= 0) {
errno = EINVAL;
return NULL;
}
if ((fp = popen(PWD_CMD, "r")) == NULL)
return NULL;
if (fgets(buf, size, fp) == NULL || (sts = pclose(fp)) != 0) {
errno = EACCES; /* Most likely error */
return NULL;
}
for (p = buf; *p != '\n'; p++) {
if (*p == '\0') {
errno = ERANGE;
return NULL;
}
}
*p = '\0';
return buf;
}
#endif /* !HAVE_GETWD */
|
