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Added O_EXCL call to open is tmp == 1 

git-svn-id: svn://svn.savannah.gnu.org/nano/trunk/nano@378 35c25a1d-7b9e-4130-9fde-d3aeb78583b8
master
Chris Allegretta 2000-12-04 03:31:39 +00:00
parent 4a938e137a
commit 5982849325
2 changed files with 15 additions and 3 deletions
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5
ChangeLog
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@ -1,4 +1,9 @@
CVS code -
- files.c:
write_file()
- Added O_EXCL to open call if tmp is set, more security which hopefully
fixes any remaining security issues.
nano 0.9.22 - 12/02/2000
- General
- Username tab completion code, and cleaned up existing tabcomp

13
files.c
View File

@ -335,10 +335,17 @@ int write_file(char *name, int tmp)
return -1;
else if (ISSET(FOLLOW_SYMLINKS) || !S_ISLNK(st.st_mode)) {
/* Open the file and truncate it. Trust the symlink. */
if ((fd = open(realname, O_WRONLY | O_CREAT | O_TRUNC,
/* If tmp is set, use O_EXCL, more security, YAY! */
if (tmp)
fd = open(realname, O_WRONLY | O_CREAT | O_EXCL | O_TRUNC,
S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH |
S_IWOTH)) == -1) {
S_IWOTH);
else
fd = open(realname, O_WRONLY | O_CREAT | O_TRUNC,
S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH |
S_IWOTH);
/* Open the file and truncate it. Trust the symlink. */
if (fd == -1) {
if (ISSET(TEMP_OPT)) {
UNSET(TEMP_OPT);
return do_writeout(1);