static int execv_shell_cmd(const char **argv)
{
const char **nargv = prepare_shell_cmd(argv);
trace_argv_printf(nargv, "trace: exec:");
sane_execvp(nargv[0], (char **)nargv);
free(nargv);
return -1;
}
static int execv_shell_cmd(const char **argv)
{
struct argv_array nargv = ARGV_ARRAY_INIT;
prepare_shell_cmd(&nargv, argv);
trace_argv_printf(nargv.argv, "trace: exec:");
sane_execvp(nargv.argv[0], (char **)nargv.argv);
argv_array_clear(&nargv);
return -1;
}
int execv_git_cmd(const char **argv) {
const char **nargv = prepare_git_cmd(argv);
trace_argv_printf(nargv, "trace: exec:");
/* execvp() can only ever return if it fails */
sane_execvp("git", (char **)nargv);
trace_printf("trace: exec failed: %s\n", strerror(errno));
free(nargv);
return -1;
}
int execv_git_cmd(const char **argv) {
struct argv_array nargv = ARGV_ARRAY_INIT;
prepare_git_cmd(&nargv, argv);
trace_argv_printf(nargv.argv, "trace: exec:");
/* execvp() can only ever return if it fails */
sane_execvp("git", (char **)nargv.argv);
trace_printf("trace: exec failed: %s\n", strerror(errno));
argv_array_clear(&nargv);
return -1;
}
int start_command(struct child_process *cmd)
{
int need_in, need_out, need_err;
int fdin[2], fdout[2], fderr[2];
int failed_errno;
char *str;
if (!cmd->argv)
cmd->argv = cmd->args.argv;
if (!cmd->env)
cmd->env = cmd->env_array.argv;
/*
* In case of errors we must keep the promise to close FDs
* that have been passed in via ->in and ->out.
*/
need_in = !cmd->no_stdin && cmd->in < 0;
if (need_in) {
if (pipe(fdin) < 0) {
failed_errno = errno;
if (cmd->out > 0)
close(cmd->out);
str = "standard input";
goto fail_pipe;
}
cmd->in = fdin[1];
}
need_out = !cmd->no_stdout
&& !cmd->stdout_to_stderr
&& cmd->out < 0;
if (need_out) {
if (pipe(fdout) < 0) {
failed_errno = errno;
if (need_in)
close_pair(fdin);
else if (cmd->in)
close(cmd->in);
str = "standard output";
goto fail_pipe;
}
cmd->out = fdout[0];
}
need_err = !cmd->no_stderr && cmd->err < 0;
if (need_err) {
if (pipe(fderr) < 0) {
failed_errno = errno;
if (need_in)
close_pair(fdin);
else if (cmd->in)
close(cmd->in);
if (need_out)
close_pair(fdout);
else if (cmd->out)
close(cmd->out);
str = "standard error";
fail_pipe:
error("cannot create %s pipe for %s: %s",
str, cmd->argv[0], strerror(failed_errno));
child_process_clear(cmd);
errno = failed_errno;
return -1;
}
cmd->err = fderr[0];
}
trace_argv_printf(cmd->argv, "trace: run_command:");
fflush(NULL);
#ifndef GIT_WINDOWS_NATIVE
{
int notify_pipe[2];
if (pipe(notify_pipe))
notify_pipe[0] = notify_pipe[1] = -1;
cmd->pid = fork();
failed_errno = errno;
if (!cmd->pid) {
/*
* Redirect the channel to write syscall error messages to
* before redirecting the process's stderr so that all die()
* in subsequent call paths use the parent's stderr.
*/
if (cmd->no_stderr || need_err) {
int child_err = dup(2);
set_cloexec(child_err);
set_error_handle(fdopen(child_err, "w"));
}
close(notify_pipe[0]);
set_cloexec(notify_pipe[1]);
child_notifier = notify_pipe[1];
atexit(notify_parent);
if (cmd->no_stdin)
dup_devnull(0);
else if (need_in) {
dup2(fdin[0], 0);
close_pair(fdin);
} else if (cmd->in) {
dup2(cmd->in, 0);
close(cmd->in);
}
if (cmd->no_stderr)
dup_devnull(2);
else if (need_err) {
dup2(fderr[1], 2);
close_pair(fderr);
} else if (cmd->err > 1) {
dup2(cmd->err, 2);
close(cmd->err);
}
if (cmd->no_stdout)
dup_devnull(1);
else if (cmd->stdout_to_stderr)
dup2(2, 1);
else if (need_out) {
dup2(fdout[1], 1);
close_pair(fdout);
} else if (cmd->out > 1) {
dup2(cmd->out, 1);
close(cmd->out);
}
if (cmd->dir && chdir(cmd->dir))
die_errno("exec '%s': cd to '%s' failed", cmd->argv[0],
cmd->dir);
if (cmd->env) {
for (; *cmd->env; cmd->env++) {
if (strchr(*cmd->env, '='))
putenv((char *)*cmd->env);
else
unsetenv(*cmd->env);
}
}
if (cmd->git_cmd)
execv_git_cmd(cmd->argv);
else if (cmd->use_shell)
execv_shell_cmd(cmd->argv);
else
sane_execvp(cmd->argv[0], (char *const*) cmd->argv);
if (errno == ENOENT) {
if (!cmd->silent_exec_failure)
error("cannot run %s: %s", cmd->argv[0],
strerror(ENOENT));
exit(127);
} else {
die_errno("cannot exec '%s'", cmd->argv[0]);
}
}
if (cmd->pid < 0)
error("cannot fork() for %s: %s", cmd->argv[0],
strerror(errno));
else if (cmd->clean_on_exit)
mark_child_for_cleanup(cmd->pid);
/*
* Wait for child's execvp. If the execvp succeeds (or if fork()
* failed), EOF is seen immediately by the parent. Otherwise, the
* child process sends a single byte.
* Note that use of this infrastructure is completely advisory,
* therefore, we keep error checks minimal.
*/
close(notify_pipe[1]);
if (read(notify_pipe[0], ¬ify_pipe[1], 1) == 1) {
/*
* At this point we know that fork() succeeded, but execvp()
* failed. Errors have been reported to our stderr.
*/
wait_or_whine(cmd->pid, cmd->argv[0], 0);
failed_errno = errno;
cmd->pid = -1;
}
close(notify_pipe[0]);
}
#else
{
int fhin = 0, fhout = 1, fherr = 2;
const char **sargv = cmd->argv;
struct argv_array nargv = ARGV_ARRAY_INIT;
if (cmd->no_stdin)
fhin = open("/dev/null", O_RDWR);
else if (need_in)
fhin = dup(fdin[0]);
else if (cmd->in)
fhin = dup(cmd->in);
if (cmd->no_stderr)
fherr = open("/dev/null", O_RDWR);
else if (need_err)
fherr = dup(fderr[1]);
else if (cmd->err > 2)
fherr = dup(cmd->err);
if (cmd->no_stdout)
fhout = open("/dev/null", O_RDWR);
else if (cmd->stdout_to_stderr)
fhout = dup(fherr);
else if (need_out)
fhout = dup(fdout[1]);
else if (cmd->out > 1)
fhout = dup(cmd->out);
if (cmd->git_cmd)
cmd->argv = prepare_git_cmd(&nargv, cmd->argv);
else if (cmd->use_shell)
cmd->argv = prepare_shell_cmd(&nargv, cmd->argv);
cmd->pid = mingw_spawnvpe(cmd->argv[0], cmd->argv, (char**) cmd->env,
cmd->dir, fhin, fhout, fherr);
failed_errno = errno;
if (cmd->pid < 0 && (!cmd->silent_exec_failure || errno != ENOENT))
error("cannot spawn %s: %s", cmd->argv[0], strerror(errno));
if (cmd->clean_on_exit && cmd->pid >= 0)
mark_child_for_cleanup(cmd->pid);
argv_array_clear(&nargv);
cmd->argv = sargv;
if (fhin != 0)
close(fhin);
if (fhout != 1)
close(fhout);
if (fherr != 2)
close(fherr);
}
#endif
if (cmd->pid < 0) {
if (need_in)
close_pair(fdin);
else if (cmd->in)
close(cmd->in);
if (need_out)
close_pair(fdout);
else if (cmd->out)
close(cmd->out);
if (need_err)
close_pair(fderr);
else if (cmd->err)
close(cmd->err);
child_process_clear(cmd);
errno = failed_errno;
return -1;
}
if (need_in)
close(fdin[0]);
else if (cmd->in)
close(cmd->in);
if (need_out)
close(fdout[1]);
else if (cmd->out)
close(cmd->out);
if (need_err)
close(fderr[1]);
else if (cmd->err)
close(cmd->err);
return 0;
}
int cmd_stash(int argc, const char **argv, const char *prefix)
{
int i = -1;
pid_t pid = getpid();
const char *index_file;
struct argv_array args = ARGV_ARRAY_INIT;
struct option options[] = {
OPT_END()
};
if (!use_builtin_stash()) {
const char *path = mkpath("%s/git-legacy-stash",
git_exec_path());
if (sane_execvp(path, (char **)argv) < 0)
die_errno(_("could not exec %s"), path);
else
BUG("sane_execvp() returned???");
}
prefix = setup_git_directory();
trace_repo_setup(prefix);
setup_work_tree();
git_config(git_diff_basic_config, NULL);
argc = parse_options(argc, argv, prefix, options, git_stash_usage,
PARSE_OPT_KEEP_UNKNOWN | PARSE_OPT_KEEP_DASHDASH);
index_file = get_index_file();
strbuf_addf(&stash_index_path, "%s.stash.%" PRIuMAX, index_file,
(uintmax_t)pid);
if (!argc)
return !!push_stash(0, NULL, prefix);
else if (!strcmp(argv[0], "apply"))
return !!apply_stash(argc, argv, prefix);
else if (!strcmp(argv[0], "clear"))
return !!clear_stash(argc, argv, prefix);
else if (!strcmp(argv[0], "drop"))
return !!drop_stash(argc, argv, prefix);
else if (!strcmp(argv[0], "pop"))
return !!pop_stash(argc, argv, prefix);
else if (!strcmp(argv[0], "branch"))
return !!branch_stash(argc, argv, prefix);
else if (!strcmp(argv[0], "list"))
return !!list_stash(argc, argv, prefix);
else if (!strcmp(argv[0], "show"))
return !!show_stash(argc, argv, prefix);
else if (!strcmp(argv[0], "store"))
return !!store_stash(argc, argv, prefix);
else if (!strcmp(argv[0], "create"))
return !!create_stash(argc, argv, prefix);
else if (!strcmp(argv[0], "push"))
return !!push_stash(argc, argv, prefix);
else if (!strcmp(argv[0], "save"))
return !!save_stash(argc, argv, prefix);
else if (*argv[0] != '-')
usage_msg_opt(xstrfmt(_("unknown subcommand: %s"), argv[0]),
git_stash_usage, options);
if (strcmp(argv[0], "-p")) {
while (++i < argc && strcmp(argv[i], "--")) {
/*
* `akpqu` is a string which contains all short options,
* except `-m` which is verified separately.
*/
if ((strlen(argv[i]) == 2) && *argv[i] == '-' &&
strchr("akpqu", argv[i][1]))
continue;
if (!strcmp(argv[i], "--all") ||
!strcmp(argv[i], "--keep-index") ||
!strcmp(argv[i], "--no-keep-index") ||
!strcmp(argv[i], "--patch") ||
!strcmp(argv[i], "--quiet") ||
!strcmp(argv[i], "--include-untracked"))
continue;
/*
* `-m` and `--message=` are verified separately because
* they need to be immediately followed by a string
* (i.e.`-m"foobar"` or `--message="foobar"`).
*/
if (starts_with(argv[i], "-m") ||
starts_with(argv[i], "--message="))
continue;
usage_with_options(git_stash_usage, options);
}
}
argv_array_push(&args, "push");
argv_array_pushv(&args, argv);
return !!push_stash(args.argc, args.argv, prefix);
}
int cmd_difftool(int argc, const char **argv, const char *prefix)
{
int use_gui_tool = 0, dir_diff = 0, prompt = -1, symlinks = 0,
tool_help = 0;
static char *difftool_cmd = NULL, *extcmd = NULL;
struct option builtin_difftool_options[] = {
OPT_BOOL('g', "gui", &use_gui_tool,
N_("use `diff.guitool` instead of `diff.tool`")),
OPT_BOOL('d', "dir-diff", &dir_diff,
N_("perform a full-directory diff")),
{ OPTION_SET_INT, 'y', "no-prompt", &prompt, NULL,
N_("do not prompt before launching a diff tool"),
PARSE_OPT_NOARG | PARSE_OPT_NONEG, NULL, 0
},
{ OPTION_SET_INT, 0, "prompt", &prompt, NULL, NULL,
PARSE_OPT_NOARG | PARSE_OPT_NONEG | PARSE_OPT_HIDDEN,
NULL, 1
},
OPT_BOOL(0, "symlinks", &symlinks,
N_("use symlinks in dir-diff mode")),
OPT_STRING('t', "tool", &difftool_cmd, N_("<tool>"),
N_("use the specified diff tool")),
OPT_BOOL(0, "tool-help", &tool_help,
N_("print a list of diff tools that may be used with "
"`--tool`")),
OPT_BOOL(0, "trust-exit-code", &trust_exit_code,
N_("make 'git-difftool' exit when an invoked diff "
"tool returns a non - zero exit code")),
OPT_STRING('x', "extcmd", &extcmd, N_("<command>"),
N_("specify a custom command for viewing diffs")),
OPT_END()
};
/*
* NEEDSWORK: Once the builtin difftool has been tested enough
* and git-legacy-difftool.perl is retired to contrib/, this preamble
* can be removed.
*/
if (!use_builtin_difftool()) {
const char *path = mkpath("%s/git-legacy-difftool",
git_exec_path());
if (sane_execvp(path, (char **)argv) < 0)
die_errno("could not exec %s", path);
return 0;
}
prefix = setup_git_directory();
trace_repo_setup(prefix);
setup_work_tree();
/* NEEDSWORK: once we no longer spawn anything, remove this */
setenv(GIT_DIR_ENVIRONMENT, absolute_path(get_git_dir()), 1);
setenv(GIT_WORK_TREE_ENVIRONMENT, absolute_path(get_git_work_tree()), 1);
git_config(difftool_config, NULL);
symlinks = has_symlinks;
argc = parse_options(argc, argv, prefix, builtin_difftool_options,
builtin_difftool_usage, PARSE_OPT_KEEP_UNKNOWN |
PARSE_OPT_KEEP_DASHDASH);
if (tool_help)
return print_tool_help();
if (use_gui_tool && diff_gui_tool && *diff_gui_tool)
setenv("GIT_DIFF_TOOL", diff_gui_tool, 1);
else if (difftool_cmd) {
if (*difftool_cmd)
setenv("GIT_DIFF_TOOL", difftool_cmd, 1);
else
die(_("no <tool> given for --tool=<tool>"));
}
if (extcmd) {
if (*extcmd)
setenv("GIT_DIFFTOOL_EXTCMD", extcmd, 1);
else
die(_("no <cmd> given for --extcmd=<cmd>"));
}
setenv("GIT_DIFFTOOL_TRUST_EXIT_CODE",
trust_exit_code ? "true" : "false", 1);
/*
* In directory diff mode, 'git-difftool--helper' is called once
* to compare the a / b directories. In file diff mode, 'git diff'
* will invoke a separate instance of 'git-difftool--helper' for
* each file that changed.
*/
if (dir_diff)
return run_dir_diff(extcmd, symlinks, prefix, argc, argv);
return run_file_diff(prompt, prefix, argc, argv);
}
