scripts/get_maintainer.pl: Print proper error message for missing $file

If you pass scripts/get_maintainer.pl the name of a FIFO or other
exciting object (/dev/stdin, for example), it would falsely print
"file not found".  Instead: stat the object rather than using -f so
that we do not mind if the object is not a file; and print the errno
value in the error message.

Signed-off-by: Ian Jackson <Ian.Jackson@eu.citrix.com>
CC: Thomas Huth <thuth@redhat.com>
CC: Paolo Bonzini <pbonzini@redhat.com>
CC: Stefano Stabellini <sstabellini@kernel.org>
CC: Anthony PERARD <anthony.perard@citrix.com>
Message-Id: <1520535787-6223-13-git-send-email-ian.jackson@eu.citrix.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Ian Jackson <ian.jackson@eu.citrix.com>

diff --git a/scripts/get_maintainer.pl b/scripts/get_maintainer.pl
index 07369aa8ea9b219d9d072b263d4dfab1bed0055e..43fb5f512f70d8f7b32681393b564dcee51c1e67 100755 (executable)
--- a/scripts/get_maintainer.pl
+++ b/scripts/get_maintainer.pl
@@ -381,8 +381,8 @@ foreach my $file (@ARGV) {
        ##if $file is a directory and it lacks a trailing slash, add one
        if ((-d $file)) {
            $file =~ s@([^/])$@$1/@;
-       } elsif (!(-f $file)) {
-           die "$P: file '${file}' not found\n";
+       } elsif (!(stat $file)) {
+           die "$P: file '${file}' not found: $!\n";
        }
     }
     if ($from_filename) {