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use MAX* not MAX* + 1

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always run pwd as using getwd() defeats the purpose
This commit is contained in:
Todd C. Miller
1998-04-06 02:48:32 +00:00
parent fa270d3752
commit 8832e50f46
1 changed files with 17 additions and 15 deletions
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32
getcwd.c
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@@ -1,5 +1,5 @@
/*
* CU sudo version 1.3.1
* CU sudo version 1.5.5
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
@@ -15,7 +15,7 @@
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* Please send bugs, changes, problems to sudo-bugs@cs.colorado.edu
* Please send bugs, changes, problems to sudo-bugs@courtesan.com
*
*******************************************************************
*
@@ -45,16 +45,16 @@ static char rcsid[] = "$Id$";
#ifdef HAVE_STRINGS_H
#include <strings.h>
#endif /* HAVE_STRINGS_H */
#ifdef HAVE_MALLOC_H
#include <malloc.h>
#endif /* HAVE_MALLOC_H */
#if defined(HAVE_MALLOC_H) && !defined(STDC_HEADERS)
# include <malloc.h>
#endif /* HAVE_MALLOC_H && !STDC_HEADERS */
#include <errno.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/param.h>
#include <netinet/in.h>
#include "pathnames.h"
#include <pathnames.h>
#include "compat.h"
#ifndef STDC_HEADERS
@@ -94,7 +94,8 @@ char * getcwd(path, len)
char * path; /* path to copy into */
size_t len; /* length of path */
{
char buf[MAXPATHLEN+1]; /* temp buffer */
char buf[MAXPATHLEN+1]; /* +1 for the newline */
size_t blen; /* length of buf */
#ifndef HAVE_GETWD
FILE * pwd; /* for popen */
#endif /* HAVE_GETWD */
@@ -104,10 +105,6 @@ char * getcwd(path, len)
return(NULL);
}
#ifdef HAVE_GETWD
if (!getwd(buf))
return(NULL);
#else
/*
* open a pipe to pwd and read a line
*/
@@ -121,16 +118,21 @@ char * getcwd(path, len)
}
pclose(pwd);
buf[strlen(buf)-1] = '\0'; /* remove newline */
#endif /* HAVE_GETWD */
blen = strlen(buf);
if (buf[blen - 1] == '\n')
buf[--blen] = '\0'; /* remove newline */
else if (blen >= MAXPATHLEN) {
errno = ENAMETOOLONG; /* only possible w/o newline */
return(NULL);
}
if (len < strlen(buf) + 1) {
if (len < blen + 1) {
errno = ERANGE;
return(NULL);
}
if (path == NULL) {
if (!(path = (char *) malloc(MAXPATHLEN+1))) {
if (!(path = (char *) malloc(MAXPATHLEN))) {
errno = ENOMEM;
return(NULL);
}