1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
|
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include <sys/syscall.h>
#include <fcntl.h>
int main(int argc, char** argv) {
printf("PID: %d\n", getpid());
int fd = syscall(SYS_openat, -100, "testfile", O_RDWR);
printf("Openat ret: %d\n", fd);
if (fd == -1) {
printf("Opneat error: %s\n", strerror(errno));
}
int ret = syscall(SYS_write, fd, "I'm writing this :) pls.", 24);
printf("Write ret: %d\n", ret);
if (ret == -1) {
printf("Write error: %s\n", strerror(errno));
}
ret = syscall(SYS_close, fd);
printf("Close ret: %d\n", ret);
if (ret == -1) {
printf("Close error: %s\n", strerror(errno));
}
return 0;
}
|
