ref: 0b8851ddb688e8de813196b7cd62f113edde2e3a
dir: /sys/src/cmd/auth/newns.c/
#include <u.h> #include <libc.h> #include <auth.h> void usage(void) { fprint(2, "usage: newns [-ad] [-n namespace] [cmd [args...]]\n"); exits("usage"); } static int rooted(char *s) { if(s[0] == '/') return 1; if(s[0] == '.' && s[1] == '/') return 1; if(s[0] == '.' && s[1] == '.' && s[2] == '/') return 1; return 0; } void main(int argc, char **argv) { extern int newnsdebug; char *defargv[] = { "/bin/rc", "-i", nil }; char *nsfile, err[ERRMAX]; int add; rfork(RFNAMEG); add = 0; nsfile = "/lib/namespace"; ARGBEGIN{ case 'a': add = 1; break; case 'd': newnsdebug = 1; break; case 'n': nsfile = ARGF(); break; default: usage(); break; }ARGEND if(argc == 0) argv = defargv; if (add) addns(getuser(), nsfile); else newns(getuser(), nsfile); exec(argv[0], argv); if(!rooted(argv[0])){ rerrstr(err, sizeof err); exec(smprint("/bin/%s", argv[0]), argv); errstr(err, sizeof err); } sysfatal("exec: %s: %r", argv[0]); }