#define _GNU_SOURCE #include <stdio.h>#include <stdlib.h>#include <signal.h>#include <limits.h>#include <unistd.h>#include <errno.h>#include <string.h>#include <fcntl.h> #include <linux/unistd.h>#include <linux/kcmp.h> #include <sys/syscall.h>#include <sys/types.h>#include <sys/stat.h>#include <sys/wait.h> static long sys_kcmp(int pid1, int pid2, int type, int fd1, int fd2){ return syscall(__NR_kcmp, pid1, pid2, type, fd1, fd2);} int main(int argc, char **argv){ const char kpath[] = "kcmp-test-file"; int pid1, pid2; int fd1, fd2; int status; fd1 = open(kpath, O_RDWR | O_CREAT | O_TRUNC, 0644); pid1 = getpid(); if (fd1 < 0) { perror("Can't create file"); exit(1); } pid2 = fork(); if (pid2 < 0) { perror("fork failed"); exit(1); } if (!pid2) { int pid2 = getpid(); int ret; fd2 = open(kpath, O_RDWR, 0644); if (fd2 < 0) { perror("Can't open file"); exit(1); } /* An example of output and arguments */ printf("pid1: %6d pid2: %6d FD: %2ld FILES: %2ld VM: %2ld " "FS: %2ld SIGHAND: %2ld IO: %2ld SYSVSEM: %2ld " "INV: %2ld\n", pid1, pid2, sys_kcmp(pid1, pid2, KCMP_FILE, fd1, fd2), sys_kcmp(pid1, pid2, KCMP_FILES, 0, 0), sys_kcmp(pid1, pid2, KCMP_VM, 0, 0), sys_kcmp(pid1, pid2, KCMP_FS, 0, 0), sys_kcmp(pid1, pid2, KCMP_SIGHAND, 0, 0), sys_kcmp(pid1, pid2, KCMP_IO, 0, 0), sys_kcmp(pid1, pid2, KCMP_SYSVSEM, 0, 0), /* This one should fail */ sys_kcmp(pid1, pid2, KCMP_TYPES + 1, 0, 0)); /* This one should return same fd */ ret = sys_kcmp(pid1, pid2, KCMP_FILE, fd1, fd1); if (ret) { printf("FAIL: 0 expected but %d returned (%s)\n", ret, strerror(errno)); ret = -1; } else printf("PASS: 0 returned as expected\n"); /* Compare with self */ ret = sys_kcmp(pid1, pid1, KCMP_VM, 0, 0); if (ret) { printf("FAIL: 0 expected but %li returned (%s)\n", ret, strerror(errno)); ret = -1; } else printf("PASS: 0 returned as expected\n"); exit(ret); } waitpid(pid2, &status, P_ALL); return 0;}
#define _GNU_SOURCE
#include <stdio.h>
#include <stdlib.h>
#include <signal.h>
#include <limits.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
#include <fcntl.h>
#include <linux/unistd.h>
#include <linux/kcmp.h>
#include <sys/syscall.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/wait.h>
static long sys_kcmp(int pid1, int pid2, int type, int fd1, int fd2)
{
return syscall(__NR_kcmp, pid1, pid2, type, fd1, fd2);
}
int main(int argc, char **argv)
{
const char kpath[] = "kcmp-test-file";
int pid1, pid2;
int fd1, fd2;
int status;
fd1 = open(kpath, O_RDWR | O_CREAT | O_TRUNC, 0644);
pid1 = getpid();
if (fd1 < 0) {
perror("Can't create file");
exit(1);
}
pid2 = fork();
if (pid2 < 0) {
perror("fork failed");
exit(1);
}
if (!pid2) {
int pid2 = getpid();
int ret;
fd2 = open(kpath, O_RDWR, 0644);
if (fd2 < 0) {
perror("Can't open file");
exit(1);
}
/* An example of output and arguments */
printf("pid1: %6d pid2: %6d FD: %2ld FILES: %2ld VM: %2ld "
"FS: %2ld SIGHAND: %2ld IO: %2ld SYSVSEM: %2ld "
"INV: %2ld\n",
pid1, pid2,
sys_kcmp(pid1, pid2, KCMP_FILE, fd1, fd2),
sys_kcmp(pid1, pid2, KCMP_FILES, 0, 0),
sys_kcmp(pid1, pid2, KCMP_VM, 0, 0),
sys_kcmp(pid1, pid2, KCMP_FS, 0, 0),
sys_kcmp(pid1, pid2, KCMP_SIGHAND, 0, 0),
sys_kcmp(pid1, pid2, KCMP_IO, 0, 0),
sys_kcmp(pid1, pid2, KCMP_SYSVSEM, 0, 0),
/* This one should fail */
sys_kcmp(pid1, pid2, KCMP_TYPES + 1, 0, 0));
/* This one should return same fd */
ret = sys_kcmp(pid1, pid2, KCMP_FILE, fd1, fd1);
if (ret) {
printf("FAIL: 0 expected but %d returned (%s)\n",
ret, strerror(errno));
ret = -1;
} else
printf("PASS: 0 returned as expected\n");
/* Compare with self */
ret = sys_kcmp(pid1, pid1, KCMP_VM, 0, 0);
if (ret) {
printf("FAIL: 0 expected but %li returned (%s)\n",
ret, strerror(errno));
ret = -1;
} else
printf("PASS: 0 returned as expected\n");
exit(ret);
}
waitpid(pid2, &status, P_ALL);
return 0;
}