threads / patch / 20214

patchFix export_marks() error handling.

Subject: [PATCH] Fix export_marks() error handling.

## tl;dr

2 messages between Jul 24, 2009 and Jul 24, 2009. Diffs are folded; open one to read it.

replies: 1people: 2as markdown or json

Matthias Andree· Jul 24, 2009, 08:17 UTC · lore
- Don't leak one FILE * on error per export_marks() call. Found with
  cppcheck and reported by Martin Ettl.
- Abort the potentially long for(;idnums.size;) loop on write errors.
- Record error if fprintf() fails for reasons not required to set the
  stream error indicator, such as ENOMEM.
- Add a trailing full-stop to error message when fopen() fails.
Signed-off-by: Matthias Andree <matthias.andree@gmx.de>
---
 builtin-fast-export.c |   14 ++++++++++----
 1 files changed, 10 insertions(+), 4 deletions(-)
Show changes to builtin-fast-export.c +10 −4
diff --git a/builtin-fast-export.c b/builtin-fast-export.c
index 9a8a6fc..ca19825 100644
--- a/builtin-fast-export.c
+++ b/builtin-fast-export.c
@@ -428,21 +428,27 @@ static void export_marks(char *file)
 	uint32_t mark;
 	struct object_decoration *deco = idnums.hash;
 	FILE *f;
+	int e = 0;
 
 	f = fopen(file, "w");
 	if (!f)
-		error("Unable to open marks file %s for writing", file);
+		error("Unable to open marks file %s for writing.", file);
 
 	for (i = 0; i < idnums.size; i++) {
 		if (deco->base && deco->base->type == 1) {
 			mark = ptr_to_mark(deco->decoration);
-			fprintf(f, ":%"PRIu32" %s\n", mark,
-				sha1_to_hex(deco->base->sha1));
+			if (fprintf(f, ":%"PRIu32" %s\n", mark,
+				sha1_to_hex(deco->base->sha1)) < 0) {
+			    e = 1;
+			    break;
+			}
 		}
 		deco++;
 	}
 
-	if (ferror(f) || fclose(f))
+	e |= ferror(f);
+	e |= fclose(f);
+	if (e)
 		error("Unable to write marks file %s.", file);
 }
 
-- 
1.6.3.3.413.g91e7

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