Date: Mon, 27 Aug 2001 00:07:46 -0400 From: Josh M Osborne <stripes@iamsofired.com> To: hackers@FreeBSD.ORG Subject: Re: Proposed Utility - detach(1) Message-ID: <20010827000746.A17299@torb.pix.net> In-Reply-To: <20010826021029.B92887@dragon.nuxi.com>; from dev-null@NUXI.com on Sun, Aug 26, 2001 at 02:10:29AM -0700 References: <20010824141955.B64018@coffee.q9media.com> <20010826095321.A2037@laptop.6bone.nl> <20010826021029.B92887@dragon.nuxi.com>
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On Sun, Aug 26, 2001 at 02:10:29AM -0700, David O'Brien wrote:
[...]
> The BSD/OS 4.1 code is also available for us to take this utility from.
Really? I didn't know they donated all of that.
Anyway it isn't a complex program. When I migrated from BSD/OS to
FreeBSD it is one of the things I missed, and wrote.
Have it. Or write another. Or take BSD/OSes.
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
int main(int argc, char *argv[]) {
int rc, ch, e;
int noclose = 0, nochdir = 0;
extern int optind, errno;
char *pname = argv[0];
while((ch = getopt(argc, argv, "nr")) != -1) {
switch(ch) {
case 'n':
noclose = 1;
break;
case 'r':
nochdir = 1;
break;
case '?':
default:
fprintf(stderr, "Usage: %s [-c] [-r] command args...\n",
pname);
fprintf(stderr,
" -n don't redirect std{in,out,err} to /dev/null\n");
fprintf(stderr,
" -r don't chdir to / (root)\n");
exit(1);
break;
}
}
argc -= optind;
argv += optind;
printf("argc %d, argv[0] %s\n", argc, argv[0]);
if (argc < 1) {
fprintf(stderr, "%s: no command to run?\n", pname);
exit(1);
}
rc = daemon(nochdir, noclose);
if (rc < 0) {
e = errno;
fprintf(stderr, "%s: daemon call failed: %s\n", pname, strerror(e));
exit(2);
}
execvp(argv[0], argv);
e = errno;
/* This may be futile - stderr may be /dev/null */
fprintf(stderr, "%s: exec of %s failed: %s\n", pname, argv[0], strerror(e));
exit(3);
}
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