shithub: ext4srv

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add -g (for custom group file) and -R (to mount as root) options

--- a/common.h

+++ b/common.h

@@ -7,8 +7,10 @@

 #pragma varargck type "M" Part*

 struct Opts {

+	char *group;

 	int cachewb;

 	int linkmode;

+	int asroot;

 };

 struct Part {

--- a/ext4srv.c

+++ b/ext4srv.c

@@ -150,8 +150,8 @@

 		rerrstr(err, sizeof(err));

 		respond(r, err);

 	}else{

-		if(findgroup(&a->p->groups, r->ifcall.uname, &a->uid) == nil)

-			a->uid = Root; /* FIXME need external mapping */

+		if(opts.asroot || findgroup(&a->p->groups, r->ifcall.uname, &a->uid) == nil)

+			a->uid = Root;

 		incref(a->p);

 		a->type = Adir;

@@ -634,7 +634,7 @@

 static void

 usage(void)

 {

-	fprint(2, "usage: %s [-C] [-l hide] [-s srvname]\n", argv0);

+	fprint(2, "usage: %s [-C] [-R] [-g GROUPFILE] [-l hide] [-s SRVNAME]\n", argv0);

 	threadexitsall("usage");

 }

@@ -651,7 +651,9 @@

 void

 threadmain(int argc, char **argv)

 {

-	char *srv;

+	char *srv, *gr;

+	vlong sz;

+	int f;

 	srv = "ext4";

 	ARGBEGIN{

@@ -666,6 +668,23 @@

 		break;

 	case 's':

 		srv = EARGF(usage());

+		break;

+	case 'g':

+		gr = EARGF(usage());

+		if((f = open(gr, OREAD)) < 0)

+			sysfatal("%r");

+		if((sz = seek(f, 0, 2)) < 0)

+			sysfatal("%s: invalid group file", gr);

+		if((opts.group = malloc(sz+1)) == nil)

+			sysfatal("memory");

+		seek(f, 0, 0);

+		if(readn(f, opts.group, sz) != sz)

+			sysfatal("%s: read failed", gr);

+		close(f);

+		opts.group[sz] = 0;

+		break;

+	case 'R':

+		opts.asroot = 1;

 		break;

 	}ARGEND

--- a/part.c

+++ b/part.c

@@ -257,13 +257,15 @@

 		goto error;

 	}

-	if((gr = readfile(p, "/etc/group", &sz)) != nil){

+	if(opts->group != nil){

+		r = loadgroups(&p->groups, opts->group);

+	}else if((gr = readfile(p, "/etc/group", &sz)) != nil){

 		gr[sz] = 0;

 		r = loadgroups(&p->groups, gr);

 		free(gr);

-		if(r != 0)

-			goto error;

 	}

+	if(r != 0)

+		goto error;

 	return 0;

 error: