teach convert_to_git a "dry run" mode

diff --git a/config.c b/config.c
index edf9914df6a1a789780c98d53b7b779908bb9141..5ea101fb251d27eadac20c665a7f01fb210c20d1 100644 (file)
--- a/config.c
+++ b/config.c
@@ -333,7 +333,7 @@ static int git_parse_file(config_fn_t fn, void *data)
        die("bad config file line %d in %s", cf->linenr, cf->name);
 }
 
-static int parse_unit_factor(const char *end, unsigned long *val)
+static int parse_unit_factor(const char *end, uintmax_t *val)
 {
        if (!*end)
                return 1;
@@ -356,11 +356,23 @@ static int git_parse_long(const char *value, long *ret)
 {
        if (value && *value) {
                char *end;
-               long val = strtol(value, &end, 0);
-               unsigned long factor = 1;
+               intmax_t val;
+               uintmax_t uval;
+               uintmax_t factor = 1;
+
+               errno = 0;
+               val = strtoimax(value, &end, 0);
+               if (errno == ERANGE)
+                       return 0;
                if (!parse_unit_factor(end, &factor))
                        return 0;
-               *ret = val * factor;
+               uval = abs(val);
+               uval *= factor;
+               if ((uval > maximum_signed_value_of_type(long)) ||
+                   (abs(val) > uval))
+                       return 0;
+               val *= factor;
+               *ret = val;
                return 1;
        }
        return 0;
@@ -370,9 +382,19 @@ int git_parse_ulong(const char *value, unsigned long *ret)
 {
        if (value && *value) {
                char *end;
-               unsigned long val = strtoul(value, &end, 0);
+               uintmax_t val;
+               uintmax_t oldval;
+
+               errno = 0;
+               val = strtoumax(value, &end, 0);
+               if (errno == ERANGE)
+                       return 0;
+               oldval = val;
                if (!parse_unit_factor(end, &val))
                        return 0;
+               if ((val > maximum_unsigned_value_of_type(long)) ||
+                   (oldval > val))
+                       return 0;
                *ret = val;
                return 1;
        }
@@ -553,7 +575,7 @@ static int git_default_core_config(const char *var, const char *value)
 
        if (!strcmp(var, "core.packedgitwindowsize")) {
                int pgsz_x2 = getpagesize() * 2;
-               packed_git_window_size = git_config_int(var, value);
+               packed_git_window_size = git_config_ulong(var, value);
 
                /* This value must be multiple of (pagesize * 2) */
                packed_git_window_size /= pgsz_x2;
@@ -564,18 +586,17 @@ static int git_default_core_config(const char *var, const char *value)
        }
 
        if (!strcmp(var, "core.bigfilethreshold")) {
-               long n = git_config_int(var, value);
-               big_file_threshold = 0 < n ? n : 0;
+               big_file_threshold = git_config_ulong(var, value);
                return 0;
        }
 
        if (!strcmp(var, "core.packedgitlimit")) {
-               packed_git_limit = git_config_int(var, value);
+               packed_git_limit = git_config_ulong(var, value);
                return 0;
        }
 
        if (!strcmp(var, "core.deltabasecachelimit")) {
-               delta_base_cache_limit = git_config_int(var, value);
+               delta_base_cache_limit = git_config_ulong(var, value);
                return 0;
        }
 
@@ -865,12 +886,12 @@ int git_config_early(config_fn_t fn, void *data, const char *repo_config)
 
        home = getenv("HOME");
        if (home) {
-               char *user_config = xstrdup(mkpath("%s/.gitconfig", home));
+               char buf[PATH_MAX];
+               char *user_config = mksnpath(buf, sizeof(buf), "%s/.gitconfig", home);
                if (!access(user_config, R_OK)) {
                        ret += git_config_from_file(fn, user_config, data);
                        found += 1;
                }
-               free(user_config);
        }
 
        if (repo_config && !access(repo_config, R_OK)) {