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#include <errno.h>
#include <getopt.h>
#include <stdio.h>
#include <string.h>
#include <sys/mount.h>
int
main(int argc, char *argv[])
{
int c = getopt(argc, argv, "f");
int options = 0; /* No options by default */
int destination = 1;
if(c == 'f') {
options = MNT_FORCE;
destination++;
}
if(argc == 1) {
printf("usage: umount mountpoint\n");
return 1;
}
int fd = umount2(argv[destination], options);
if(fd == -1) {
fprintf(
stderr, "umount: %s: %s\n", argv[destination], strerror(errno));
return 1;
}
return 0;
}
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