From 0cc2c2c2894a840b0bca24da42f4154f33b5af0a Mon Sep 17 00:00:00 2001
From: Rob Landley <rob@landley.net>
Date: Wed, 21 Jun 2006 03:53:33 +0000
Subject: [PATCH] Patch from Paul Fox to improve mount's error handling
 behavior, which I beat on a bit.

---
 util-linux/mount.c | 37 ++++++++++++++++---------------------
 1 file changed, 16 insertions(+), 21 deletions(-)

diff --git a/util-linux/mount.c b/util-linux/mount.c
index fecf81606..c64c3f438 100644
--- a/util-linux/mount.c
+++ b/util-linux/mount.c
@@ -256,9 +256,9 @@ static int mount_it_now(struct mntent *mp, int vfsflags, char *filteropts)
 // Mount one directory.  Handles NFS, loopback, autobind, and filesystem type
 // detection.  Returns 0 for success, nonzero for failure.
 
-static int singlemount(struct mntent *mp)
+static int singlemount(struct mntent *mp, int ignore_busy)
 {
-	int rc = 1, vfsflags;
+	int rc = -1, vfsflags;
 	char *loopFile = 0, *filteropts = 0;
 	llist_t *fl = 0;
 	struct stat st;
@@ -277,14 +277,14 @@ static int singlemount(struct mntent *mp)
 	{
 		if (nfsmount(mp->mnt_fsname, mp->mnt_dir, &vfsflags, &filteropts, 1)) {
 			bb_perror_msg("nfsmount failed");
-			return 1;
+			goto report_error;
 		} else {
 			// Strangely enough, nfsmount() doesn't actually mount() anything.
 			mp->mnt_type = "nfs";
 			rc = mount_it_now(mp, vfsflags, filteropts);
 			if (ENABLE_FEATURE_CLEAN_UP) free(filteropts);
 			
-			return rc;
+			goto report_error;
 		}
 	}
 
@@ -354,10 +354,14 @@ static int singlemount(struct mntent *mp)
 			free(mp->mnt_fsname);
 		}
 	}
+report_error:
+	if (rc && errno == EBUSY && ignore_busy) rc = 0;
+	if (rc < 0)
+		bb_perror_msg("Mounting %s on %s failed", mp->mnt_fsname, mp->mnt_dir);
+
 	return rc;
 }
 
-
 // Parse options, if necessary parse fstab/mtab, and call singlemount for
 // each directory to be mounted.
 
@@ -365,7 +369,7 @@ int mount_main(int argc, char **argv)
 {
 	char *cmdopts = bb_xstrdup(""), *fstabname, *fstype=0, *storage_path=0;
 	FILE *fstab;
-	int i, opt, all = FALSE, rc = 1;
+	int i, opt, all = FALSE, rc = 0;
 	struct mntent mtpair[2], *mtcur = mtpair;
 
 	/* parse long options, like --bind and --move.  Note that -o option
@@ -447,7 +451,7 @@ int mount_main(int argc, char **argv)
 		mtpair->mnt_dir = argv[optind+1];
 		mtpair->mnt_type = fstype;
 		mtpair->mnt_opts = cmdopts;
-		rc = singlemount(mtpair);
+		rc = singlemount(mtpair, 0);
 		goto clean_up;
 	}
 
@@ -491,10 +495,10 @@ int mount_main(int argc, char **argv)
 				mtcur = mtnext;
 				mtcur->mnt_opts=bb_xstrdup(mtcur->mnt_opts);
 				append_mount_options(&(mtcur->mnt_opts),cmdopts);
-				rc = singlemount(mtcur);
+				rc = singlemount(mtcur, 0);
 				free(mtcur->mnt_opts);
 			}
-			break;
+			goto clean_up;
 		}
 
 		/* If we're trying to mount something specific and this isn't it,
@@ -529,14 +533,9 @@ int mount_main(int argc, char **argv)
 
 			// Mount this thing.
 
-			rc = singlemount(mtcur);
-			if(rc) {
-				// Don't whine about already mounted fs when mounting all.
-				// Note: we should probably change return value to indicate 
-				// failure, without causing a duplicate error message.
-				if (errno != EBUSY) bb_perror_msg("Mounting %s on %s failed",
-						mtcur->mnt_fsname, mtcur->mnt_dir);
-				rc = 0;
+			if (singlemount(mtcur, 1)) {
+				/* Count number of failed mounts */
+				rc++;
 			}
 		}
 	}
@@ -549,9 +548,5 @@ clean_up:
 		free(cmdopts);
 	}
 
-	if(rc)
-		bb_perror_msg("Mounting %s on %s failed",
-				mtcur->mnt_fsname, mtcur->mnt_dir);
-
 	return rc;
 }