mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-08 14:20:07 +00:00
8c4f69d711
When enabling _FORTIFY_SOURCE, some functions now lead to warnings when their result is not checked. Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
72 lines
1.5 KiB
C
72 lines
1.5 KiB
C
/* If stdio is working correctly, after this is run infile and outfile
|
|
will have the same contents. If the bug (found in GNU C library 0.3)
|
|
exhibits itself, outfile will be missing the 2nd through 1023rd
|
|
characters. */
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
|
|
#include <support/support.h>
|
|
|
|
static char buf[8192];
|
|
|
|
int
|
|
main (void)
|
|
{
|
|
FILE *in;
|
|
FILE *out;
|
|
static char inname[] = OBJPFX "bug5test.in";
|
|
static char outname[] = OBJPFX "bug5test.out";
|
|
char *printbuf;
|
|
size_t i;
|
|
int result;
|
|
|
|
/* Create a test file. */
|
|
in = fopen (inname, "w+");
|
|
if (in == NULL)
|
|
{
|
|
perror (inname);
|
|
return 1;
|
|
}
|
|
for (i = 0; i < 1000; ++i)
|
|
fprintf (in, "%Zu\n", i);
|
|
|
|
out = fopen (outname, "w");
|
|
if (out == NULL)
|
|
{
|
|
perror (outname);
|
|
return 1;
|
|
}
|
|
if (fseek (in, 0L, SEEK_SET) != 0)
|
|
abort ();
|
|
putc (getc (in), out);
|
|
i = fread (buf, 1, sizeof (buf), in);
|
|
if (i == 0)
|
|
{
|
|
perror ("fread");
|
|
return 1;
|
|
}
|
|
if (fwrite (buf, 1, i, out) != i)
|
|
{
|
|
perror ("fwrite");
|
|
return 1;
|
|
}
|
|
fclose (in);
|
|
fclose (out);
|
|
|
|
puts ("There should be no further output from this test.");
|
|
fflush (stdout);
|
|
|
|
/* We must remove this entry to assure the `cmp' binary does not use
|
|
the perhaps incompatible new shared libraries. */
|
|
unsetenv ("LD_LIBRARY_PATH");
|
|
|
|
printbuf = xasprintf ("cmp %s %s", inname, outname);
|
|
result = system (printbuf);
|
|
remove (inname);
|
|
remove (outname);
|
|
|
|
exit ((result != 0));
|
|
}
|