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v0.5.1
v0.5.1
https://github.com/python/cpython
Revision 8497f0a85d97e1d9660bbb450ba9f2dc8b03f87d authored by Giampaolo Rodolà on 07 December 2010, 18:54:43 UTC, committed by Giampaolo Rodolà on 07 December 2010, 18:54:43 UTC
1 parent 1740947
Tip revision: 8497f0a85d97e1d9660bbb450ba9f2dc8b03f87d authored by Giampaolo Rodolà on 07 December 2010, 18:54:43 UTC
backporting security fix of issue 9129 (smtpd module vulnerable to DoS attacks in case of connection bashing)
backporting security fix of issue 9129 (smtpd module vulnerable to DoS attacks in case of connection bashing)
Tip revision: 8497f0a
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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