Bug #360: Check whether files are writable early.

diff --git a/pkgmk.in b/pkgmk.in
index 2358de08988050a83dbed0e4ad584422b7e72268..0c826ac0207c824e2c1a8c06c63aab68edc58bc4 100755 (executable)
--- a/pkgmk.in
+++ b/pkgmk.in
@@ -75,6 +75,13 @@ check_directory() {
        fi
 }
 
+check_file() {
+       if [ -e $1 ] && [ ! -w $1 ]; then
+               error "File '$1' is not writable."
+               exit 1
+       fi
+}
+
 download_file() {
        info "Downloading '$1'."
 
@@ -347,6 +354,7 @@ remove_work_dir() {
 build_package() {
        local BUILD_SUCCESSFUL="no"
        
+       check_file "$TARGET"
        make_work_dir
 
        if [ "$UID" != "0" ]; then
@@ -458,6 +466,7 @@ update_footprint() {
                exit 1
        fi
        
+       check_file "$PKGMK_FOOTPRINT"
        make_footprint > $PKGMK_FOOTPRINT
        touch $TARGET
        
@@ -612,6 +621,7 @@ main() {
        
        if [ "$PKGMK_UPDATE_MD5SUM" = "yes" ]; then
                download_source
+               check_file "$PKGMK_MD5SUM"
                make_md5sum > $PKGMK_MD5SUM
                info "Md5sum updated."
                exit 0