ref: 4821c261c4cea895ddcbd7c70bc71103c9a2763b
dir: /sys/src/cmd/auth/none.c/
#include <u.h> #include <libc.h> #include <auth.h> char *namespace; void usage(void) { fprint(2, "usage: auth/none [-n namespace] [cmd ...]\n"); exits("usage"); } void main(int argc, char *argv[]) { char cmd[256]; int fd; ARGBEGIN{ case 'n': namespace = EARGF(usage()); break; default: usage(); }ARGEND if (rfork(RFENVG|RFNAMEG) < 0) sysfatal("can't make new pgrp"); fd = open("#c/user", OWRITE); if (fd < 0) sysfatal("can't open #c/user"); if (write(fd, "none", strlen("none")) < 0) sysfatal("can't become none"); close(fd); if (newns("none", namespace) < 0) sysfatal("can't build namespace"); if (argc > 0) { strecpy(cmd, cmd+sizeof cmd, argv[0]); exec(cmd, &argv[0]); if (strncmp(cmd, "/", 1) != 0 && strncmp(cmd, "./", 2) != 0 && strncmp(cmd, "../", 3) != 0) { snprint(cmd, sizeof cmd, "/bin/%s", argv[0]); exec(cmd, &argv[0]); } } else { strcpy(cmd, "/bin/rc"); execl(cmd, cmd, nil); } sysfatal(cmd); }