From 253b6e965c4a01e0165aa6aafcbb268ad12f1678 Mon Sep 17 00:00:00 2001
From: Ben Gras <ben@minix3.org>
Date: Wed, 7 Nov 2012 11:06:56 +0100
Subject: [PATCH] mkfs: symlink support

	. mkproto too
---
 man/man1/mkfs.mfs.1        |  4 ++--
 usr.sbin/mkfs.mfs/mkfs.c   | 22 ++++++++++++++++++++--
 usr.sbin/mkproto/mkproto.c | 13 ++++++++++++-
 3 files changed, 34 insertions(+), 5 deletions(-)

diff --git a/man/man1/mkfs.mfs.1 b/man/man1/mkfs.mfs.1
index 2b2361739..4fb69b100 100644
--- a/man/man1/mkfs.mfs.1
+++ b/man/man1/mkfs.mfs.1
@@ -89,8 +89,8 @@ The first entry on each line (except the first 3 and the $ lines, which
 terminate directories) is the name the file or directory will get on the
 new file system.  
 Next comes its mode, with the first character being
-\fB\-dbc\fR for regular files, directories, block special files and character 
-special files, respectively.
+\fB\-dbcs\fR for regular files, directories, block special files and character 
+special files, symlinks, respectively.
 The next two characters are used to specify the SETUID and SETGID bits, as
 shown above.
 The last three characters of the mode are the 
diff --git a/usr.sbin/mkfs.mfs/mkfs.c b/usr.sbin/mkfs.mfs/mkfs.c
index 1cbc761b7..5bfdd344b 100644
--- a/usr.sbin/mkfs.mfs/mkfs.c
+++ b/usr.sbin/mkfs.mfs/mkfs.c
@@ -479,6 +479,8 @@ void sizeup_dir()
 		sizeup_dir();
 	} else if (*p == 'b' || *p == 'c') {
 
+	} else if (*p == 's') {
+		zonecount++; /* Symlink contents is always stored a block */
 	} else {
 		if ((f = fopen(token[4], "r")) == NULL) {
 			fprintf(stderr, "%s: Can't open %s: %s\n",
@@ -690,6 +692,21 @@ ino_t inode;
   incr_link(inode);
 }
 
+void enter_symlink(ino_t inode, char *link)
+{
+  zone_t z;
+  char *buf;
+
+  buf = alloc_block();
+  z = alloc_zone();
+  strcpy(buf, link);
+  put_block((z << zone_shift), buf);
+
+  add_zone(inode, z, (size_t) strlen(link), current_time);
+
+  free(buf);
+}
+
 
 /*================================================================
  *	    eat_dir  -  recursively install directory
@@ -738,6 +755,8 @@ ino_t parent;
 		if (token[6]) size = atoi(token[6]);
 		size = block_size * size;
 		add_zone(n, (zone_t) (makedev(maj,min)), size, current_time);
+	} else if (*p == 's') {
+		enter_symlink(n, token[4]);
 	} else {
 		/* Regular file. Go read it. */
 		if ((f = open(token[4], O_RDONLY)) < 0) {
@@ -781,8 +800,6 @@ int f;
   free(buf);
 }
 
-
-
 /*================================================================
  *	    directory & inode management assist group
  *===============================================================*/
@@ -1151,6 +1168,7 @@ char *p;
   if (c1 == 'd') mode |= S_IFDIR;
   if (c1 == 'b') mode |= S_IFBLK;
   if (c1 == 'c') mode |= S_IFCHR;
+  if (c1 == 's') mode |= S_IFLNK;
   if (c1 == '-') mode |= S_IFREG;
   if (c2 == 'u') mode |= S_ISUID;
   if (c3 == 'g') mode |= S_ISGID;
diff --git a/usr.sbin/mkproto/mkproto.c b/usr.sbin/mkproto/mkproto.c
index 26b1ad368..3f4cc99b1 100644
--- a/usr.sbin/mkproto/mkproto.c
+++ b/usr.sbin/mkproto/mkproto.c
@@ -155,7 +155,7 @@ char *dirname;
 	count++;
 	strcpy(tempend, name);
 
-	if (stat(temp, &st) == -1) {
+	if (lstat(temp, &st) == -1) {
 		fprintf(stderr, "cant get status of '%s' \n", temp);
 		continue;
 	}
@@ -189,6 +189,16 @@ char *dirname;
 		fprintf(outfile, "\n");
 		continue;
 	}
+	if (mode == S_IFLNK) {
+		char linkcontent[PATH_MAX];
+		memset(linkcontent, 0, sizeof(linkcontent));
+		if(readlink(temp, linkcontent, sizeof(linkcontent)) < 0) {
+			perror("readlink");
+			exit(1);
+		}
+		fprintf(outfile, "%s%s\n", indentstr, linkcontent);
+		continue;
+	}
 	fprintf(outfile, " /dev/null");
 	fprintf(stderr,"File\n\t%s\n has an invalid mode, made empty.\n",temp);
   }
@@ -217,6 +227,7 @@ struct stat *st;
 	(st->st_mode & S_IFMT) == S_IFDIR ? 'd' :
 	(st->st_mode & S_IFMT) == S_IFCHR ? 'c' :
 	(st->st_mode & S_IFMT) == S_IFBLK ? 'b' :
+	(st->st_mode & S_IFMT) == S_IFLNK ? 's' :
 	'-',			/* file type */
 	(st->st_mode & S_ISUID) ? 'u' : '-',	/* set uid */
 	(st->st_mode & S_ISGID) ? 'g' : '-',	/* set gid */
-- 
2.44.0