Improve input and output file open error handling

Tell file name and actual error in error message. Print error message
to stderr. Always exit with failure when not able to open an input or
output file.

1 files changed, 4 insertions, 4 deletions

diff --git a/i18npool/source/indexentry/genindex_data.cxx b/i18npool/source/indexentry/genindex_data.cxx
index 48ae02576a87..85424536a29d 100644
--- a/i18npool/source/indexentry/genindex_data.cxx
+++ b/i18npool/source/indexentry/genindex_data.cxx
@@ -51,8 +51,8 @@ SAL_IMPLEMENT_MAIN_WITH_ARGS(argc, argv)
 
     fp = fopen(argv[1], "rb");  // open the source file for read;
     if (fp == NULL) {
-        printf("Open the rule source file failed.");
-        return 1;
+        fprintf(stderr, "Opening the rule source file %s for reading failed: %s\n", argv[1], strerror(errno));
+        exit(1);
     }
 
 
@@ -97,8 +97,8 @@ SAL_IMPLEMENT_MAIN_WITH_ARGS(argc, argv)
 
     fp = fopen(argv[2], "wb");
     if (fp == NULL) {
-        printf("Can't create the C source file.");
-        return 1;
+        fprintf(stderr, "Opening %s for writing failed: %s\n", argv[2], strerror(errno));
+        exit(1);
     }
 
     fprintf(fp, "/*\n");