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#include <fcntl.h> /* O_TMPFILE requires -D_GNU_SOURCE */
#include <paths.h>
#include <stdio.h>
#include <stdlib.h>
#include "check.h"
#ifndef O_TMPFILE
#warning O_TMPFILE is missing, either too old GLIBC, Linux, or non-Linux system
#endif
#define READBACK "Reality is frequently inaccurate.\n"
int main(void)
{
char buf[80] = "";
FILE *fp;
printf("Before tempfile():\n");
system("ls -lrt " _PATH_TMP " | tail -3");
fflush(stdout);
fp = tempfile();
if (fp == NULL)
fprintf(stderr, "Failed tempfile(), errno %d: %s", errno, strerror(errno));
fail_unless(fp != NULL);
fputs(READBACK, fp);
rewind(fp);
if (fgets(buf, sizeof(buf), fp))
fprintf(stderr, "\nRead-back from tempfile: %s", buf);
fail_unless(!strcmp(buf, READBACK));
printf("\nAfter tempfile(), should be same list:\n");
system("ls -lrt " _PATH_TMP " | tail -3");
fflush(stdout);
return fclose(fp);
}
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