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