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/** @file 410user/progs/bg.c
* @author mjsulliv (2009)
* @brief runs a command in the background
* @public yes
* @for p3,p4
* @covers fork
* @bug This should arguably be done by the shell.
*/
#include <syscall.h>
#include <stdio.h>
#include <assert.h>
int main(int argc, char *argv[])
{
int pid;
if (argv[argc]) printf("*** fsck: %p!\n", argv[argc]);
if (argc < 2) {
printf("usage: %s program [arguments]\n", argv[0]);
return 1;
}
if ((pid = fork()) > 0) {
printf("Child pid: %d\n", pid);
return 0;
} else if (pid < 0) {
return 1;
}
/* Now we are a child, our parent is exiting, so we will be owned by init.
* The shell was waiting on our parent and doesn't give a hoot about us. */
int ret = exec(argv[1], &argv[1]);
panic("exec failed: %d!", ret);
return 0;
}
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