mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-30 13:13:43 +08:00
b0e805fa0d
The fix for BZ #17273 introduced a single byte of memory corruption when the line is entirely blank. It would walk back past the start of the buffer if the heap happened to be 0x20 or 0x09 and then write a NUL byte. buffer = '\n'; end_ptr = buffer; while (end_ptr[-1] == ' ' || end_ptr[-1] == '\t') end_ptr--; *end_ptr = '\0'; Fix that and rework the tests. Adding the testcase for BZ #17273 to the existing \040 parser does not really make sense as it's unrelated, and leads to confusing behavior: it implicitly relies on the new entry being longer than the previous entry (since it just rewinds the FILE*). Split it out into its own dedicated testcase instead.
83 lines
1.7 KiB
C
83 lines
1.7 KiB
C
/* Test case by Horst von Brand <vonbrand@sleipnir.valparaiso.cl>
|
|
and Ulrich Drepper <drepper@cygnus.com>. */
|
|
#include <mntent.h>
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
|
|
|
|
static int
|
|
do_test (void)
|
|
{
|
|
int result = 0;
|
|
struct mntent mef;
|
|
struct mntent *mnt = &mef;
|
|
FILE *fp;
|
|
|
|
mef.mnt_fsname = strdupa ("/dev/hda1");
|
|
mef.mnt_dir = strdupa ("/some dir");
|
|
mef.mnt_type = strdupa ("ext2");
|
|
mef.mnt_opts = strdupa ("defaults");
|
|
mef.mnt_freq = 1;
|
|
mef.mnt_passno = 2;
|
|
|
|
if (hasmntopt (mnt, "defaults"))
|
|
printf ("Found!\n");
|
|
else
|
|
{
|
|
printf ("Didn't find it\n");
|
|
result = 1;
|
|
}
|
|
|
|
fp = tmpfile ();
|
|
if (fp == NULL)
|
|
{
|
|
printf ("Cannot open temporary file: %m\n");
|
|
result = 1;
|
|
}
|
|
else
|
|
{
|
|
char buf[1024];
|
|
|
|
/* Write the name entry. */
|
|
addmntent (fp, &mef);
|
|
|
|
/* Prepare for reading. */
|
|
rewind (fp);
|
|
|
|
/* First, read it raw. */
|
|
if (fgets (buf, sizeof (buf), fp) == NULL)
|
|
{
|
|
printf ("Cannot read temporary file: %m");
|
|
result = 1;
|
|
}
|
|
else
|
|
if (strcmp (buf, "/dev/hda1 /some\\040dir ext2 defaults 1 2\n") != 0)
|
|
{
|
|
puts ("Raw file data not correct");
|
|
result = 1;
|
|
}
|
|
|
|
/* Prepare for reading, part II. */
|
|
rewind (fp);
|
|
|
|
/* Now read it cooked. */
|
|
mnt = getmntent (fp);
|
|
|
|
if (strcmp (mnt->mnt_fsname, "/dev/hda1") != 0
|
|
|| strcmp (mnt->mnt_dir, "/some dir") != 0
|
|
|| strcmp (mnt->mnt_type, "ext2") != 0
|
|
|| strcmp (mnt->mnt_opts, "defaults") != 0
|
|
|| mnt->mnt_freq != 1
|
|
|| mnt->mnt_passno != 2)
|
|
{
|
|
puts ("Error while reading written entry back in");
|
|
result = 1;
|
|
}
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
#define TEST_FUNCTION do_test ()
|
|
#include "../test-skeleton.c"
|