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-rw-r--r--git.c127
1 files changed, 80 insertions, 47 deletions
diff --git a/git.c b/git.c
index 9c49519831..da278c3d41 100644
--- a/git.c
+++ b/git.c
@@ -1,26 +1,23 @@
#include "builtin.h"
-#include "cache.h"
#include "exec_cmd.h"
#include "help.h"
-#include "quote.h"
#include "run-command.h"
-#include "commit.h"
const char git_usage_string[] =
"git [--version] [--help] [-C <path>] [-c name=value]\n"
" [--exec-path[=<path>]] [--html-path] [--man-path] [--info-path]\n"
- " [-p|--paginate|--no-pager] [--no-replace-objects] [--bare]\n"
+ " [-p | --paginate | --no-pager] [--no-replace-objects] [--bare]\n"
" [--git-dir=<path>] [--work-tree=<path>] [--namespace=<name>]\n"
" <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,
@@ -28,16 +25,15 @@ static const char *env_names[] = {
GIT_PREFIX_ENVIRONMENT
};
static char *orig_env[4];
-static int saved_environment;
+static int saved_env_before_alias;
-static void save_env(void)
+static void save_env_before_alias(void)
{
int i;
- if (saved_environment)
+ if (saved_env_before_alias)
return;
- saved_environment = 1;
- if (!getcwd(orig_cwd, sizeof(orig_cwd)))
- die_errno("cannot getcwd");
+ saved_env_before_alias = 1;
+ orig_cwd = xgetcwd();
for (i = 0; i < ARRAY_SIZE(env_names); i++) {
orig_env[i] = getenv(env_names[i]);
if (orig_env[i])
@@ -45,12 +41,16 @@ static void save_env(void)
}
}
-static void restore_env(void)
+static void restore_env(int external_alias)
{
int i;
- if (*orig_cwd && chdir(orig_cwd))
+ if (!external_alias && 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 (external_alias &&
+ !strcmp(env_names[i], GIT_PREFIX_ENVIRONMENT))
+ continue;
if (orig_env[i])
setenv(env_names[i], orig_env[i], 1);
else
@@ -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;
@@ -206,10 +207,12 @@ static int handle_options(const char ***argv, int *argc, int *envchanged)
fprintf(stderr, "No directory given for -C.\n" );
usage(git_usage_string);
}
- if (chdir((*argv)[1]))
- die_errno("Cannot change to '%s'", (*argv)[1]);
- if (envchanged)
- *envchanged = 1;
+ if ((*argv)[1][0]) {
+ if (chdir((*argv)[1]))
+ die_errno("Cannot change to '%s'", (*argv)[1]);
+ if (envchanged)
+ *envchanged = 1;
+ }
(*argv)++;
(*argc)--;
} else {
@@ -226,14 +229,14 @@ static int handle_options(const char ***argv, int *argc, int *envchanged)
static int handle_alias(int *argcp, const char ***argv)
{
int envchanged = 0, ret = 0, saved_errno = errno;
- const char *subdir;
int count, option_count;
const char **new_argv;
const char *alias_command;
char *alias_string;
int unused_nongit;
- subdir = setup_git_directory_gently(&unused_nongit);
+ save_env_before_alias();
+ setup_git_directory_gently(&unused_nongit);
alias_command = (*argv)[0];
alias_string = alias_lookup(alias_command);
@@ -243,6 +246,7 @@ static int handle_alias(int *argcp, const char ***argv)
int argc = *argcp, i;
commit_pager_choice();
+ restore_env(1);
/* build alias_argv */
alias_argv = xmalloc(sizeof(*alias_argv) * (argc + 1));
@@ -281,8 +285,7 @@ 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);
@@ -292,8 +295,7 @@ static int handle_alias(int *argcp, const char ***argv)
ret = 1;
}
- if (subdir && chdir(subdir))
- die_errno("Cannot change to '%s'", subdir);
+ restore_env(0);
errno = saved_errno;
@@ -308,7 +310,6 @@ static int handle_alias(int *argcp, const char ***argv)
* RUN_SETUP for reading from the configuration file.
*/
#define NEED_WORK_TREE (1<<3)
-#define NO_SETUP (1<<4)
struct cmd_struct {
const char *cmd;
@@ -371,6 +372,7 @@ static int run_builtin(struct cmd_struct *p, int argc, const char **argv)
static struct cmd_struct commands[] = {
{ "add", cmd_add, RUN_SETUP | NEED_WORK_TREE },
+ { "am", cmd_am, RUN_SETUP | NEED_WORK_TREE },
{ "annotate", cmd_annotate, RUN_SETUP },
{ "apply", cmd_apply, RUN_SETUP_GENTLY },
{ "archive", cmd_archive },
@@ -389,7 +391,7 @@ static struct cmd_struct commands[] = {
{ "cherry", cmd_cherry, RUN_SETUP },
{ "cherry-pick", cmd_cherry_pick, RUN_SETUP | NEED_WORK_TREE },
{ "clean", cmd_clean, RUN_SETUP | NEED_WORK_TREE },
- { "clone", cmd_clone, NO_SETUP },
+ { "clone", cmd_clone },
{ "column", cmd_column, RUN_SETUP_GENTLY },
{ "commit", cmd_commit, RUN_SETUP | NEED_WORK_TREE },
{ "commit-tree", cmd_commit_tree, RUN_SETUP },
@@ -415,8 +417,9 @@ static struct cmd_struct commands[] = {
{ "hash-object", cmd_hash_object },
{ "help", cmd_help },
{ "index-pack", cmd_index_pack, RUN_SETUP_GENTLY },
- { "init", cmd_init_db, NO_SETUP },
- { "init-db", cmd_init_db, NO_SETUP },
+ { "init", cmd_init_db },
+ { "init-db", cmd_init_db },
+ { "interpret-trailers", cmd_interpret_trailers, RUN_SETUP_GENTLY },
{ "log", cmd_log, RUN_SETUP },
{ "ls-files", cmd_ls_files, RUN_SETUP },
{ "ls-remote", cmd_ls_remote, RUN_SETUP_GENTLY },
@@ -445,6 +448,7 @@ static struct cmd_struct commands[] = {
{ "pickaxe", cmd_blame, RUN_SETUP },
{ "prune", cmd_prune, RUN_SETUP },
{ "prune-packed", cmd_prune_packed, RUN_SETUP },
+ { "pull", cmd_pull, RUN_SETUP | NEED_WORK_TREE },
{ "push", cmd_push, RUN_SETUP },
{ "read-tree", cmd_read_tree, RUN_SETUP },
{ "receive-pack", cmd_receive_pack },
@@ -468,6 +472,7 @@ static struct cmd_struct commands[] = {
{ "stage", cmd_add, RUN_SETUP | NEED_WORK_TREE },
{ "status", cmd_status, RUN_SETUP | NEED_WORK_TREE },
{ "stripspace", cmd_stripspace },
+ { "submodule--helper", cmd_submodule__helper, RUN_SETUP },
{ "symbolic-ref", cmd_symbolic_ref, RUN_SETUP },
{ "tag", cmd_tag, RUN_SETUP },
{ "unpack-file", cmd_unpack_file, RUN_SETUP },
@@ -483,18 +488,24 @@ static struct cmd_struct commands[] = {
{ "verify-tag", cmd_verify_tag, RUN_SETUP },
{ "version", cmd_version },
{ "whatchanged", cmd_whatchanged, RUN_SETUP },
+ { "worktree", cmd_worktree, RUN_SETUP },
{ "write-tree", cmd_write_tree, RUN_SETUP },
};
-int is_builtin(const char *s)
+static struct cmd_struct *get_builtin(const char *s)
{
int i;
for (i = 0; i < ARRAY_SIZE(commands); i++) {
- struct cmd_struct *p = commands+i;
+ struct cmd_struct *p = commands + i;
if (!strcmp(s, p->cmd))
- return 1;
+ return p;
}
- return 0;
+ return NULL;
+}
+
+int is_builtin(const char *s)
+{
+ return !!get_builtin(s);
}
static void handle_builtin(int argc, const char **argv)
@@ -502,6 +513,7 @@ static void handle_builtin(int argc, const char **argv)
const char *cmd = argv[0];
int i;
static const char ext[] = STRIP_EXTENSION;
+ struct cmd_struct *builtin;
if (sizeof(ext) > 1) {
i = strlen(argv[0]) - strlen(ext);
@@ -518,15 +530,16 @@ static void handle_builtin(int argc, const char **argv)
argv[0] = cmd = "help";
}
- for (i = 0; i < ARRAY_SIZE(commands); i++) {
- struct cmd_struct *p = commands+i;
- if (strcmp(p->cmd, cmd))
- continue;
- if (saved_environment && (p->option & NO_SETUP)) {
- restore_env();
- break;
- }
- exit(run_builtin(p, argc, argv));
+ builtin = get_builtin(cmd);
+ if (builtin) {
+ /*
+ * XXX: if we can figure out cases where it is _safe_
+ * to do, we can avoid spawning a new process when
+ * saved_env_before_alias is true
+ * (i.e. setup_git_dir* has been run once)
+ */
+ if (!saved_env_before_alias)
+ exit(run_builtin(builtin, argc, argv));
}
}
@@ -583,7 +596,6 @@ static int run_argv(int *argcp, const char ***argv)
*/
if (done_alias)
break;
- save_env();
if (!handle_alias(argcp, argv))
break;
done_alias = 1;
@@ -592,11 +604,32 @@ 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)
{
const char **argv = (const char **) av;
const char *cmd;
+ int done_help = 0;
startup_info = &git_startup_info;
@@ -611,6 +644,8 @@ int main(int argc, char **av)
*/
sanitize_stdfds();
+ restore_sigpipe_to_default();
+
git_setup_gettext();
trace_command_performance(argv);
@@ -657,9 +692,7 @@ int main(int argc, char **av)
setup_path();
while (1) {
- static int done_help = 0;
- static int was_alias = 0;
- was_alias = run_argv(&argc, &argv);
+ int was_alias = run_argv(&argc, &argv);
if (errno != ENOENT)
break;
if (was_alias) {
generated by cgit v1.2.3 (git 2.39.1) at 2025-12-26 14:46:24 +0000