[Buildroot] [RFC PATCH v3 1/2] makedevs: only warn when xattr support disabled

[Petr Vorel <petr.vorel@gmail.com>]

Previously makedevs failed when xattr configuration defined while
disabled BR2_ROOTFS_DEVICE_TABLE_SUPPORTS_EXTENDED_ATTRIBUTES.
Therefore check for this configuration would be required
in each use. Therefore only print warning with number of discharged lines.

No package is using this feature so far (it's used only in tests),
thus no need to change any package config.

Signed-off-by: Petr Vorel <petr.vorel@gmail.com>
---
Changes v2->v3:
* print warning only once at the end, print number of discharged lines
* put into single line (feel free to add new line)

 package/makedevs/makedevs.c | 14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/package/makedevs/makedevs.c b/package/makedevs/makedevs.c
index c57b964f5c..aa0b4b4cba 100644
--- a/package/makedevs/makedevs.c
+++ b/package/makedevs/makedevs.c
@@ -493,6 +493,7 @@ int main(int argc, char **argv)
 		printf("table=<stdin>\n");
 	}
 
+	unsigned int xattr_warned = 0;
 	while ((line = bb_get_chomped_line_from_file(table))) {
 		char type;
 		unsigned int mode = 0755;
@@ -518,9 +519,7 @@ int main(int argc, char **argv)
 			if (bb_set_xattr(full_name, xattr) < 0)
 				bb_error_msg_and_die("can't set cap %s on file %s\n", xattr, full_name);
 #else
-			bb_error_msg_and_die("line %d not supported: '%s'\nDid you forget to enable "
-					     "BR2_ROOTFS_DEVICE_TABLE_SUPPORTS_EXTENDED_ATTRIBUTES?\n",
-					     linenum, line);
+			xattr_warned++;
 #endif /* EXTENDED_ATTRIBUTES */
 			continue;
 		}
@@ -641,6 +640,15 @@ int main(int argc, char **argv)
 loop:
 		free(line);
 	}
+
+	if (xattr_warned) {
+			bb_error_msg("%u lines with xattr configuration discharged, enable "
+					     "BR2_ROOTFS_DEVICE_TABLE_SUPPORTS_EXTENDED_ATTRIBUTES "
+						 "to get xattr support\n",
+					     xattr_warned);
+			ret = EXIT_FAILURE;
+	}
+
 	fclose(table);
 
 	return ret;
-- 
2.22.0