auth/box: preserve cwd name, but clear it out
Auth/box previously switched to /, rather than preserving the cwd. This would break relative paths to items that would get pulled into the namespace. This change removes the '-.' flag, and causes auth/box to keep the current working directory, making it more usable for scripting.
This commit is contained in:
Ori Bernstein
parent
520a39efcd
commit
bc64cc50ac
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@ -62,7 +62,7 @@ changeuser, convkeys, printnetkey, status, enable, disable, authsrv, guard.srv,
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.PP
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.B auth/box
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[
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.B -d
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.B -s
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] [
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.B -rc
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.I file
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@ -298,9 +298,8 @@ the child namespace; the
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flag specifies a string of driver
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characters to keep. The
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.B -s
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flag gives a base set of namespace
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components, ones expected by rc, then passes
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the first argument as a script file to rc.
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flag initializes the namespace to what rc expects,
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and passes its arguments unmodified to /bin/rc.
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.PP
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.I As
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executes
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@ -2,7 +2,11 @@
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#include <libc.h>
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#include <auth.h>
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static int debug;
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static int debug;
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static char cwd[8192];
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static char *parts[256];
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static int mflags[nelem(parts)];
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static int nparts;
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static void
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binderr(char *new, char *old, int flag)
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@ -32,20 +36,14 @@ binderr(char *new, char *old, int flag)
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fprint(2, "bind %s %s %s\n", dash, new, old);
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}
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if(bind(new, old, flag) < 0)
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sysfatal("bind: %r");
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sysfatal("bind %s: %r", new);
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}
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static void
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resolvenames(char **names, int nname)
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{
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int i;
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char buf[8192];
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int fd;
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fd = open(".", OREAD|OCEXEC);
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if(fd < 0)
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sysfatal("could not open .: %r");
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fd2path(fd, buf, sizeof buf);
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for(i = 0; i < nname; i++){
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if(names[i] == nil)
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continue;
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@ -55,10 +53,9 @@ resolvenames(char **names, int nname)
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case '/':
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break;
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default:
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names[i] = cleanname(smprint("%s/%s", buf, names[i]));
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}
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names[i] = cleanname(smprint("%s/%s", cwd, names[i]));
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}
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}
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close(fd);
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}
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static void
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@ -103,7 +100,8 @@ sandbox(char **names, int *flags, int nname)
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free(d);
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binderr(skel, dir, MBEFORE);
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}
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binderr(names[j], targ, flags[j]);
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if(flags[j] != -1)
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binderr(names[j], targ, flags[j]);
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}
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binderr(newroot, "/", MREPL);
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}
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@ -133,16 +131,11 @@ skelfs(void)
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sysfatal("/mnt/d mount setup: %r");
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}
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static char *parts[256];
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static int mflags[nelem(parts)];
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static int nparts;
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static char *rc[] = { "/bin/rc", nil , nil};
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static void
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push(char *path, int flag)
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{
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if(nparts == nelem(parts))
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sysfatal("component overflow");
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sysfatal("too many bound paths");
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parts[nparts] = path;
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mflags[nparts++] = flag;
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}
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@ -150,23 +143,23 @@ push(char *path, int flag)
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void
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usage(void)
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{
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fprint(2, "usage %s: [ -d ] [ -r file ] [ -c dir ] [ -e devs ] [ -. path ] cmd args...\n", argv0);
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fprint(2, "usage %s: [ -r file ] [ -c dir ] [ -e devs ] cmd args...\n", argv0);
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exits("usage");
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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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char devs[1024];
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int dfd;
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char *path;
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char **argp, devs[128];
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int i, narg, dfd;
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char *a;
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int sflag;
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nparts = 0;
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path = "/";
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narg = 0;
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memset(devs, 0, sizeof devs);
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sflag = 0;
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argp = argv;
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ARGBEGIN{
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case 'D':
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debug++;
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@ -184,9 +177,6 @@ main(int argc, char **argv)
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case 'e':
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snprint(devs, sizeof devs, "%s%s", devs, EARGF(usage()));
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break;
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case '.':
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path = EARGF(usage());
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break;
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case 's':
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sflag = 1;
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break;
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@ -195,18 +185,19 @@ main(int argc, char **argv)
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break;
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}ARGEND
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if(argc == 0)
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if(argc == 0 && !sflag)
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usage();
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if(getwd(cwd, sizeof(cwd)) == nil)
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sysfatal("getwd: %r");
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push(cwd, -1);
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if(sflag){
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snprint(devs, sizeof devs, "%s%s", devs, "|d");
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push("/srv", MREPL|MCREATE);
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push("/env", MREPL|MCREATE);
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push("/rc", MREPL);
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push("/bin", MREPL);
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push(argv[0], MREPL);
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rc[1] = argv[0];
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argv = rc;
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argp[narg++] = "/bin/rc";
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} else {
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if(access(argv[0], AEXIST) == -1){
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if((argv[0] = smprint("/bin/%s", argv[0])) == nil)
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@ -216,6 +207,9 @@ main(int argc, char **argv)
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}
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push(argv[0], MREPL);
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}
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for(i = 0; i < argc; i++)
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argp[narg++] = argv[i];
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argp[narg] = nil;
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rfork(RFNAMEG|RFFDG);
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skelfs();
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@ -225,7 +219,7 @@ main(int argc, char **argv)
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resolvenames(parts, nparts);
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sandbox(parts, mflags, nparts);
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if(debug)
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fprint(2, "chdev %s\n", devs);
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@ -238,8 +232,8 @@ main(int argc, char **argv)
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}
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close(dfd);
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if(chdir(path) < 0)
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sysfatal("can not cd to %s", path);
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exec(argv[0], argv);
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if(chdir(cwd) < 0)
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sysfatal("chdir %s: %r", cwd);
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exec(argp[0], argp);
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sysfatal("exec: %r");
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}
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