#include "quote.h"
#include "exec_cmd.h"
#include "strbuf.h"
+#include "run-command.h"
#define COMMAND_DIR "git-shell-commands"
+#define HELP_COMMAND COMMAND_DIR "/help"
+#define NOLOGIN_COMMAND COMMAND_DIR "/no-interactive-login"
static int do_generic_cmd(const char *me, char *arg)
{
die("could not chdir to user's home directory");
}
+static void run_shell(void)
+{
+ int done = 0;
+ static const char *help_argv[] = { HELP_COMMAND, NULL };
+
+ if (!access(NOLOGIN_COMMAND, F_OK)) {
+ /* Interactive login disabled. */
+ const char *argv[] = { NOLOGIN_COMMAND, NULL };
+ int status;
+
+ status = run_command_v_opt(argv, 0);
+ if (status < 0)
+ exit(127);
+ exit(status);
+ }
+
+ /* Print help if enabled */
+ run_command_v_opt(help_argv, RUN_SILENT_EXEC_FAILURE);
+
+ do {
+ struct strbuf line = STRBUF_INIT;
+ const char *prog;
+ char *full_cmd;
+ char *rawargs;
+ char *split_args;
+ const char **argv;
+ int code;
+ int count;
+
+ fprintf(stderr, "git> ");
+ if (strbuf_getline(&line, stdin, '\n') == EOF) {
+ fprintf(stderr, "\n");
+ strbuf_release(&line);
+ break;
+ }
+ strbuf_trim(&line);
+ rawargs = strbuf_detach(&line, NULL);
+ split_args = xstrdup(rawargs);
+ count = split_cmdline(split_args, &argv);
+ if (count < 0) {
+ fprintf(stderr, "invalid command format '%s': %s\n", rawargs,
+ split_cmdline_strerror(count));
+ free(split_args);
+ free(rawargs);
+ continue;
+ }
+
+ prog = argv[0];
+ if (!strcmp(prog, "")) {
+ } else if (!strcmp(prog, "quit") || !strcmp(prog, "logout") ||
+ !strcmp(prog, "exit") || !strcmp(prog, "bye")) {
+ done = 1;
+ } else if (is_valid_cmd_name(prog)) {
+ full_cmd = make_cmd(prog);
+ argv[0] = full_cmd;
+ code = run_command_v_opt(argv, RUN_SILENT_EXEC_FAILURE);
+ if (code == -1 && errno == ENOENT) {
+ fprintf(stderr, "unrecognized command '%s'\n", prog);
+ }
+ free(full_cmd);
+ } else {
+ fprintf(stderr, "invalid command format '%s'\n", prog);
+ }
+
+ free(argv);
+ free(rawargs);
+ } while (!done);
+}
+
static struct commands {
const char *name;
int (*exec)(const char *me, char *arg);
char *prog;
const char **user_argv;
struct commands *cmd;
- int devnull_fd;
+ int count;
+
+ git_setup_gettext();
+
+ git_extract_argv0_path(argv[0]);
/*
* Always open file descriptors 0/1/2 to avoid clobbering files
- * in die(). It also avoids not messing up when the pipes are
- * dup'ed onto stdin/stdout/stderr in the child processes we spawn.
+ * in die(). It also avoids messing up when the pipes are dup'ed
+ * onto stdin/stdout/stderr in the child processes we spawn.
*/
- devnull_fd = open("/dev/null", O_RDWR);
- while (devnull_fd >= 0 && devnull_fd <= 2)
- devnull_fd = dup(devnull_fd);
- if (devnull_fd == -1)
- die_errno("opening /dev/null failed");
- close (devnull_fd);
+ sanitize_stdfds();
/*
* Special hack to pretend to be a CVS server
*/
- if (argc == 2 && !strcmp(argv[1], "cvs server"))
+ if (argc == 2 && !strcmp(argv[1], "cvs server")) {
argv--;
-
- /*
- * We do not accept anything but "-c" followed by "cmd arg",
- * where "cmd" is a very limited subset of git commands.
- */
- else if (argc != 3 || strcmp(argv[1], "-c"))
- die("What do you think I am? A shell?");
+ } else if (argc == 1) {
+ /* Allow the user to run an interactive shell */
+ cd_to_homedir();
+ if (access(COMMAND_DIR, R_OK | X_OK) == -1) {
+ die("Interactive git shell is not enabled.\n"
+ "hint: ~/" COMMAND_DIR " should exist "
+ "and have read and execute access.");
+ }
+ run_shell();
+ exit(0);
+ } else if (argc != 3 || strcmp(argv[1], "-c")) {
+ /*
+ * We do not accept any other modes except "-c" followed by
+ * "cmd arg", where "cmd" is a very limited subset of git
+ * commands or a command in the COMMAND_DIR
+ */
+ die("Run with no arguments or with -c cmd");
+ }
prog = xstrdup(argv[2]);
if (!strncmp(prog, "git", 3) && isspace(prog[3]))
}
cd_to_homedir();
- if (split_cmdline(prog, &user_argv) != -1) {
+ count = split_cmdline(prog, &user_argv);
+ if (count >= 0) {
if (is_valid_cmd_name(user_argv[0])) {
prog = make_cmd(user_argv[0]);
user_argv[0] = prog;
die("unrecognized command '%s'", argv[2]);
} else {
free(prog);
- die("invalid command format '%s'", argv[2]);
+ die("invalid command format '%s': %s", argv[2],
+ split_cmdline_strerror(count));
}
}