ref: 1fe3143e4c43ce2c74e0cfdd70b1bd556bbb9e1b
dir: /sys/src/cmd/auth/none.c/
#include <u.h> #include <libc.h> #include <auth.h> extern int newnsdebug; char *defargv[] = { "/bin/rc", "-i", nil }; char *namespace = nil; void usage(void) { fprint(2, "usage: %s [-d] [-n namespace] [cmd [args...]]\n", argv0); exits("usage"); } void run(char **a) { exec(a[0], a); if(a[0][0] != '/' && a[0][0] != '#' && (a[0][0] != '.' || (a[0][1] != '/' && (a[0][1] != '.' || a[0][2] != '/')))) exec(smprint("/bin/%s", a[0]), a); sysfatal("exec: %s: %r", a[0]); } void main(int argc, char *argv[]) { int fd; ARGBEGIN{ case 'd': newnsdebug = 1; break; case 'n': namespace = EARGF(usage()); break; default: usage(); }ARGEND fd = open("#c/user", OWRITE); if(fd < 0) sysfatal("can't open #c/user: %r"); if(write(fd, "none", strlen("none")) < 0) sysfatal("can't become none: %r"); close(fd); if(newns("none", namespace) < 0) sysfatal("can't build namespace: %r"); if(argc == 0) argv = defargv; run(argv); }