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v0.5.1
https://github.com/python/cpython
Revision 1803024c8a13c14d1f02e640ddca054077449698 authored by Barry Warsaw on 01 March 2010, 22:16:51 UTC, committed by Barry Warsaw on 01 March 2010, 22:16:51 UTC
1 parent fc79e8f
Tip revision: 1803024c8a13c14d1f02e640ddca054077449698 authored by Barry Warsaw on 01 March 2010, 22:16:51 UTC
More copyright year updates.
More copyright year updates.
Tip revision: 1803024
getcwd.c
/* 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
#if defined(PATH_MAX) && PATH_MAX > 1024
#define MAXPATHLEN PATH_MAX
#else
#define MAXPATHLEN 1024
#endif
#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 */
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