dir.c: minor clean-up

diff --git a/config.c b/config.c
index f89a61191591c1242ba8fb3ac5b03330cdb1c06b..ed96213c44265289c26d46edaaf740cebd0b4c86 100644 (file)
--- a/config.c
+++ b/config.c
@@ -6,6 +6,7 @@
  *
  */
 #include "cache.h"
+#include "exec_cmd.h"
 
 #define MAXNAME (256)
 
@@ -426,6 +427,18 @@ int git_default_config(const char *var, const char *value)
                return 0;
        }
 
+       if (!strcmp(var, "core.editor")) {
+               editor_program = xstrdup(value);
+               return 0;
+       }
+
+       if (!strcmp(var, "core.excludesfile")) {
+               if (!value)
+                       die("core.excludesfile without value");
+               excludes_file = xstrdup(value);
+               return 0;
+       }
+
        /* Add other config variables here and to Documentation/config.txt. */
        return 0;
 }
@@ -447,6 +460,21 @@ int git_config_from_file(config_fn_t fn, const char *filename)
        return ret;
 }
 
+const char *git_etc_gitconfig(void)
+{
+       static const char *system_wide;
+       if (!system_wide) {
+               system_wide = ETC_GITCONFIG;
+               if (!is_absolute_path(system_wide)) {
+                       /* interpret path relative to exec-dir */
+                       const char *exec_path = git_exec_path();
+                       system_wide = prefix_path(exec_path, strlen(exec_path),
+                                               system_wide);
+               }
+       }
+       return system_wide;
+}
+
 int git_config(config_fn_t fn)
 {
        int ret = 0;
@@ -459,8 +487,8 @@ int git_config(config_fn_t fn)
         * config file otherwise. */
        filename = getenv(CONFIG_ENVIRONMENT);
        if (!filename) {
-               if (!access(ETC_GITCONFIG, R_OK))
-                       ret += git_config_from_file(fn, ETC_GITCONFIG);
+               if (!access(git_etc_gitconfig(), R_OK))
+                       ret += git_config_from_file(fn, git_etc_gitconfig());
                home = getenv("HOME");
                filename = getenv(CONFIG_LOCAL_ENVIRONMENT);
                if (!filename)
@@ -715,7 +743,7 @@ int git_config_set_multivar(const char* key, const char* value,
        int fd = -1, in_fd;
        int ret;
        char* config_filename;
-       char* lock_file;
+       struct lock_file *lock = NULL;
        const char* last_dot = strrchr(key, '.');
 
        config_filename = getenv(CONFIG_ENVIRONMENT);
@@ -725,7 +753,6 @@ int git_config_set_multivar(const char* key, const char* value,
                        config_filename  = git_path("config");
        }
        config_filename = xstrdup(config_filename);
-       lock_file = xstrdup(mkpath("%s.lock", config_filename));
 
        /*
         * Since "key" actually contains the section name and the real
@@ -770,11 +797,12 @@ int git_config_set_multivar(const char* key, const char* value,
        store.key[i] = 0;
 
        /*
-        * The lock_file serves a purpose in addition to locking: the new
+        * The lock serves a purpose in addition to locking: the new
         * contents of .git/config will be written into it.
         */
-       fd = open(lock_file, O_WRONLY | O_CREAT | O_EXCL, 0666);
-       if (fd < 0 || adjust_shared_perm(lock_file)) {
+       lock = xcalloc(sizeof(struct lock_file), 1);
+       fd = hold_lock_file_for_update(lock, config_filename, 0);
+       if (fd < 0) {
                fprintf(stderr, "could not lock config file\n");
                free(store.key);
                ret = -1;
@@ -914,25 +942,31 @@ int git_config_set_multivar(const char* key, const char* value,
                                goto write_err_out;
 
                munmap(contents, contents_sz);
-               unlink(config_filename);
        }
 
-       if (rename(lock_file, config_filename) < 0) {
-               fprintf(stderr, "Could not rename the lock file?\n");
+       if (close(fd) || commit_lock_file(lock) < 0) {
+               fprintf(stderr, "Cannot commit config file!\n");
                ret = 4;
                goto out_free;
        }
 
+       /* fd is closed, so don't try to close it below. */
+       fd = -1;
+       /*
+        * lock is committed, so don't try to roll it back below.
+        * NOTE: Since lockfile.c keeps a linked list of all created
+        * lock_file structures, it isn't safe to free(lock).  It's
+        * better to just leave it hanging around.
+        */
+       lock = NULL;
        ret = 0;
 
 out_free:
        if (0 <= fd)
                close(fd);
+       if (lock)
+               rollback_lock_file(lock);
        free(config_filename);
-       if (lock_file) {
-               unlink(lock_file);
-               free(lock_file);
-       }
        return ret;
 
 write_err_out: