glibc/stdio-common/test-fwrite.c

69 lines
1.2 KiB
C

#include <stdio.h>
#include <string.h>
int
main (int argc, char *argv[])
{
FILE *f = tmpfile ();
char obuf[99999], ibuf[sizeof obuf];
char *line;
size_t linesz;
if (! f)
{
perror ("tmpfile");
return 1;
}
if (fputs ("line\n", f) == EOF)
{
perror ("fputs");
return 1;
}
memset (obuf, 'z', sizeof obuf);
memset (ibuf, 'y', sizeof ibuf);
if (fwrite (obuf, sizeof obuf, 1, f) != 1)
{
perror ("fwrite");
return 1;
}
rewind (f);
line = NULL;
linesz = 0;
if (getline (&line, &linesz, f) != 5)
{
perror ("getline");
return 1;
}
if (strcmp (line, "line\n"))
{
puts ("Lines differ. Test FAILED!");
return 1;
}
if (fread (ibuf, sizeof ibuf, 1, f) != 1)
{
perror ("fread");
return 1;
}
if (memcmp (ibuf, obuf, sizeof ibuf))
{
puts ("Buffers differ. Test FAILED!");
return 1;
}
asprintf (&line, "\
GDB is free software and you are welcome to distribute copies of it\n\
under certain conditions; type \"show copying\" to see the conditions.\n\
There is absolutely no warranty for GDB; type \"show warranty\" for details.\n\
");
puts ("Test succeeded.");
return 0;
}