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* path.cc (readlink): Check if buffer length is positive. Truncate output to 

buffer length.  Don't terminate buffer with '\0'.
This commit is contained in:
Christopher Faylor 2000-09-04 17:52:42 +00:00
parent 9c136d7ea6
commit f76325499a
14 changed files with 33 additions and 27 deletions
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6
winsup/cygwin/ChangeLog
View File

@ -1,3 +1,9 @@
2000-09-03 Egor Duda <deo@logos-m.ru>
* path.cc (readlink): Check if buffer length is positive.
Truncate output to buffer length. Don't terminate buffer
with '\0'.
Sun Sep 3 00:38:40 2000 Christopher Faylor <cgf@cygnus.com>
* environ.cc (environ_init): Don't free the new environment table after

15
winsup/cygwin/path.cc
View File

@ -2436,6 +2436,13 @@ int
readlink (const char *path, char *buf, int buflen)
{
extern suffix_info stat_suffixes[];
if (buflen < 0)
{
set_errno (ENAMETOOLONG);
return -1;
}
path_conv pathbuf (path, PC_SYM_CONTENTS, stat_suffixes);
if (pathbuf.error)
@ -2452,14 +2459,8 @@ readlink (const char *path, char *buf, int buflen)
return -1;
}
int len = strlen (pathbuf.get_win32 ());
if (len > (buflen - 1))
{
set_errno (ENAMETOOLONG);
return -1;
}
int len = max (buflen, (int) strlen (pathbuf.get_win32 ()));
memcpy (buf, pathbuf.get_win32 (), len);
buf[len] = '\0';
/* errno set by symlink.check if error */
return len;

3
winsup/cygwin/syscalls.cc
View File

@ -601,8 +601,7 @@ _link (const char *a, const char *b)
&dwBytesWritten,
TRUE, // abort
FALSE, // don't process security
&lpContext
);
&lpContext);
}
else
syscall_printf ("cannot write streamId, %E");