Documentation: include 'merge.branchdesc' for merge and config as well

diff --git a/git.c b/git.c
index 9c495198317bf31ff40785a48bf0a44253548098..18fbf79430687a473e9306f2bb65abbaec161bb4 100644 (file)
--- a/git.c
+++ b/git.c
@@ -14,13 +14,13 @@ const char git_usage_string[] =
        "           <command> [<args>]";
 
 const char git_more_info_string[] =
-       N_("'git help -a' and 'git help -g' lists available subcommands and some\n"
+       N_("'git help -a' and 'git help -g' list available subcommands and some\n"
           "concept guides. See 'git help <command>' or 'git help <concept>'\n"
           "to read about a specific subcommand or concept.");
 
 static struct startup_info git_startup_info;
 static int use_pager = -1;
-static char orig_cwd[PATH_MAX];
+static char *orig_cwd;
 static const char *env_names[] = {
        GIT_DIR_ENVIRONMENT,
        GIT_WORK_TREE_ENVIRONMENT,
@@ -36,8 +36,7 @@ static void save_env(void)
        if (saved_environment)
                return;
        saved_environment = 1;
-       if (!getcwd(orig_cwd, sizeof(orig_cwd)))
-               die_errno("cannot getcwd");
+       orig_cwd = xgetcwd();
        for (i = 0; i < ARRAY_SIZE(env_names); i++) {
                orig_env[i] = getenv(env_names[i]);
                if (orig_env[i])
@@ -48,8 +47,9 @@ static void save_env(void)
 static void restore_env(void)
 {
        int i;
-       if (*orig_cwd && chdir(orig_cwd))
+       if (orig_cwd && chdir(orig_cwd))
                die_errno("could not move to %s", orig_cwd);
+       free(orig_cwd);
        for (i = 0; i < ARRAY_SIZE(env_names); i++) {
                if (orig_env[i])
                        setenv(env_names[i], orig_env[i], 1);
@@ -161,9 +161,10 @@ static int handle_options(const char ***argv, int *argc, int *envchanged)
                        if (envchanged)
                                *envchanged = 1;
                } else if (!strcmp(cmd, "--bare")) {
-                       static char git_dir[PATH_MAX+1];
+                       char *cwd = xgetcwd();
                        is_bare_repository_cfg = 1;
-                       setenv(GIT_DIR_ENVIRONMENT, getcwd(git_dir, sizeof(git_dir)), 0);
+                       setenv(GIT_DIR_ENVIRONMENT, cwd, 0);
+                       free(cwd);
                        setenv(GIT_IMPLICIT_WORK_TREE_ENVIRONMENT, "0", 1);
                        if (envchanged)
                                *envchanged = 1;
@@ -281,8 +282,7 @@ static int handle_alias(int *argcp, const char ***argv)
                                  "trace: alias expansion: %s =>",
                                  alias_command);
 
-               new_argv = xrealloc(new_argv, sizeof(char *) *
-                                   (count + *argcp));
+               REALLOC_ARRAY(new_argv, count + *argcp);
                /* insert after command name */
                memcpy(new_argv + count, *argv + 1, sizeof(char *) * *argcp);
 
@@ -417,6 +417,7 @@ static struct cmd_struct commands[] = {
        { "index-pack", cmd_index_pack, RUN_SETUP_GENTLY },
        { "init", cmd_init_db, NO_SETUP },
        { "init-db", cmd_init_db, NO_SETUP },
+       { "interpret-trailers", cmd_interpret_trailers, RUN_SETUP },
        { "log", cmd_log, RUN_SETUP },
        { "ls-files", cmd_ls_files, RUN_SETUP },
        { "ls-remote", cmd_ls_remote, RUN_SETUP_GENTLY },
@@ -592,6 +593,26 @@ static int run_argv(int *argcp, const char ***argv)
        return done_alias;
 }
 
+/*
+ * Many parts of Git have subprograms communicate via pipe, expect the
+ * upstream of a pipe to die with SIGPIPE when the downstream of a
+ * pipe does not need to read all that is written.  Some third-party
+ * programs that ignore or block SIGPIPE for their own reason forget
+ * to restore SIGPIPE handling to the default before spawning Git and
+ * break this carefully orchestrated machinery.
+ *
+ * Restore the way SIGPIPE is handled to default, which is what we
+ * expect.
+ */
+static void restore_sigpipe_to_default(void)
+{
+       sigset_t unblock;
+
+       sigemptyset(&unblock);
+       sigaddset(&unblock, SIGPIPE);
+       sigprocmask(SIG_UNBLOCK, &unblock, NULL);
+       signal(SIGPIPE, SIG_DFL);
+}
 
 int main(int argc, char **av)
 {
@@ -611,6 +632,8 @@ int main(int argc, char **av)
         */
        sanitize_stdfds();
 
+       restore_sigpipe_to_default();
+
        git_setup_gettext();
 
        trace_command_performance(argv);