git-mailinfo: use strbuf's instead of fixed buffers

diff --git a/builtin-fetch--tool.c b/builtin-fetch--tool.c
index ed60847d9fcd0ad8803c432af8d0bc2dd3567768..7460ab7fce2a4e6a7e014f448819140e2204ccb7 100644 (file)
--- a/builtin-fetch--tool.c
+++ b/builtin-fetch--tool.c
@@ -511,10 +511,14 @@ int cmd_fetch__tool(int argc, const char **argv, const char *prefix)
        if (!strcmp("append-fetch-head", argv[1])) {
                int result;
                FILE *fp;
+               char *filename;
 
                if (argc != 8)
                        return error("append-fetch-head takes 6 args");
-               fp = fopen(git_path("FETCH_HEAD"), "a");
+               filename = git_path("FETCH_HEAD");
+               fp = fopen(filename, "a");
+               if (!fp)
+                       return error("cannot open %s: %s\n", filename, strerror(errno));
                result = append_fetch_head(fp, argv[2], argv[3],
                                           argv[4], argv[5],
                                           argv[6], !!argv[7][0],
@@ -525,10 +529,14 @@ int cmd_fetch__tool(int argc, const char **argv, const char *prefix)
        if (!strcmp("native-store", argv[1])) {
                int result;
                FILE *fp;
+               char *filename;
 
                if (argc != 5)
                        return error("fetch-native-store takes 3 args");
-               fp = fopen(git_path("FETCH_HEAD"), "a");
+               filename = git_path("FETCH_HEAD");
+               fp = fopen(filename, "a");
+               if (!fp)
+                       return error("cannot open %s: %s\n", filename, strerror(errno));
                result = fetch_native_store(fp, argv[2], argv[3], argv[4],
                                            verbose, force);
                fclose(fp);