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// See ../getdents/getdents.go for some info on why
// this exists.
#include <fcntl.h>
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdint.h>
#include <sys/stat.h>
#include <sys/syscall.h>
#include <errno.h>
#include <string.h>
int main(int argc, char *argv[])
{
if(argc != 2) {
printf("Usage: %s PATH\n", argv[0]);
printf("Run getdents(2) on PATH in a 100ms loop\n");
exit(1);
}
const char *path = argv[1];
for (int i = 1 ; ; i ++ ) {
int fd = open(path, O_RDONLY);
if (fd == -1) {
printf("%3d: open: %s\n", i, strerror(errno));
if(errno == EINTR) {
continue;
}
exit(1);
}
char tmp[10000];
int sum = 0;
printf("%3d: getdents64: ", i);
for ( ; ; ) {
errno = 0;
int n = syscall(SYS_getdents64, fd, tmp, sizeof(tmp));
printf("n=%d; ", n);
if (n <= 0) {
printf("errno=%d total %d bytes\n", errno, sum);
if (n < 0) {
exit(1);
}
break;
}
sum += n;
}
close(fd);
usleep(100000);
}
}
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