Tibor Nagy
d1a424c002
This will allow us to redefine the exit function.
For example:
```
#define exit(code) { \
fprintf(stderr, "%s:%d: exit(%s) in function ‘%s’\n",
__FILE__, __LINE__, #code, __func__); \
_exit(code); \
}
```
29 lines
607 B
C
29 lines
607 B
C
#include <stdio.h>
|
|
#include <fcntl.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
|
|
static char oldpath[] = "old-name.out";
|
|
static char newpath[] = "new-name.out";
|
|
static char str[] = "Hello, World!";
|
|
int str_len = 13;
|
|
|
|
int main(void) {
|
|
char buf[14];
|
|
buf[13] = 0x00;
|
|
int fd = creat(oldpath, 0777);
|
|
write(fd, str, str_len);
|
|
close(fd);
|
|
rename(oldpath, newpath);
|
|
fd = open(newpath, O_RDONLY);
|
|
read(fd, buf, str_len);
|
|
close(fd);
|
|
remove(newpath);
|
|
if (strcmp(str, buf) == 0) {
|
|
exit(EXIT_SUCCESS);
|
|
} else {
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
}
|