/* * Copyright ( c ) 2024 Alexey Dobriyan < adobriyan @ gmail . com > * * Permission to use , copy , modify , and distribute this software for any * purpose with or without fee is hereby granted , provided that the above * copyright notice and this permission notice appear in all copies . * * THE SOFTWARE IS PROVIDED " AS IS " AND THE AUTHOR DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS . IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR * ANY SPECIAL , DIRECT , INDIRECT , OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE , DATA OR PROFITS , WHETHER IN AN * ACTION OF CONTRACT , NEGLIGENCE OR OTHER TORTIOUS ACTION , ARISING OUT OF * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE .
/* Test that userspace program is not kernel thread. */
#undef NDEBUG
#include <assert.h>
#include <fcntl.h>
#include <string.h>
#include <unistd.h>
int main(
void )
{
int fd = open(
"/proc/self/status" , O_RDONLY);
assert(fd >=
0 );
char buf[
4096 ];
ssize_t rv = read(fd, buf,
sizeof (buf));
assert(
0 <= rv && rv <
sizeof (buf));
buf[rv] =
'\0' ;
/* This test is very much not kernel thread. */
assert(strstr(buf,
"Kthread:\t0\n" ));
return 0 ;
}
Messung V0.5 in Prozent C=88 H=95 G=91
¤ Dauer der Verarbeitung: 0.3 Sekunden
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