minix/commands/simple/newroot.c

31 lines
460 B
C

/*
newroot.c
Replace the current root with a new one
*/
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
int main(int argc, char *argv[])
{
int r;
char *dev;
if (argc != 2)
{
fprintf(stderr, "Usage: newroot <block-special>\n");
exit(1);
}
dev= argv[1];
r= mount(dev, "/", 0 /* !ro */);
if (r != 0)
{
fprintf(stderr, "newroot: mount failed: %s\n", strerror(errno));
exit(1);
}
return 0;
}