61 lines
974 B
C
61 lines
974 B
C
#include <u.h>
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#include <libc.h>
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#include <auth.h>
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extern int newnsdebug;
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char *defargv[] = { "/bin/rc", "-i", nil };
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char *namespace = nil;
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void
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usage(void)
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{
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fprint(2, "usage: %s [-d] [-n namespace] [cmd [args...]]\n", argv0);
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exits("usage");
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}
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void
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run(char **a)
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{
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exec(a[0], a);
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if(a[0][0] != '/' && a[0][0] != '#' &&
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(a[0][0] != '.' || (a[0][1] != '/' &&
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(a[0][1] != '.' || a[0][2] != '/'))))
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exec(smprint("/bin/%s", a[0]), a);
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sysfatal("exec: %s: %r", a[0]);
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}
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void
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main(int argc, char *argv[])
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{
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int fd;
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ARGBEGIN{
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case 'd':
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newnsdebug = 1;
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break;
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case 'n':
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namespace = EARGF(usage());
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break;
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default:
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usage();
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}ARGEND
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fd = open("#c/user", OWRITE);
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if(fd < 0)
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sysfatal("can't open #c/user: %r");
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if(write(fd, "none", strlen("none")) < 0)
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sysfatal("can't become none: %r");
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close(fd);
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if(newns("none", namespace) < 0)
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sysfatal("can't build namespace: %r");
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if(argc == 0)
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argv = defargv;
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run(argv);
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}
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