]>
git.ipfire.org Git - thirdparty/git.git/blob - shell.c
5 #include "run-command.h"
9 #define COMMAND_DIR "git-shell-commands"
10 #define HELP_COMMAND COMMAND_DIR "/help"
11 #define NOLOGIN_COMMAND COMMAND_DIR "/no-interactive-login"
13 static int do_generic_cmd(const char *me
, char *arg
)
15 const char *my_argv
[4];
18 if (!arg
|| !(arg
= sq_dequote(arg
)) || *arg
== '-')
20 if (!skip_prefix(me
, "git-", &me
))
27 return execv_git_cmd(my_argv
);
30 static int is_valid_cmd_name(const char *cmd
)
32 /* Test command contains no . or / characters */
33 return cmd
[strcspn(cmd
, "./")] == '\0';
36 static char *make_cmd(const char *prog
)
38 return xstrfmt("%s/%s", COMMAND_DIR
, prog
);
41 static void cd_to_homedir(void)
43 const char *home
= getenv("HOME");
45 die("could not determine user's home directory; HOME is unset");
46 if (chdir(home
) == -1)
47 die("could not chdir to user's home directory");
50 static void run_shell(void)
53 static const char *help_argv
[] = { HELP_COMMAND
, NULL
};
55 if (!access(NOLOGIN_COMMAND
, F_OK
)) {
56 /* Interactive login disabled. */
57 const char *argv
[] = { NOLOGIN_COMMAND
, NULL
};
60 status
= run_command_v_opt(argv
, 0);
66 /* Print help if enabled */
67 run_command_v_opt(help_argv
, RUN_SILENT_EXEC_FAILURE
);
70 struct strbuf line
= STRBUF_INIT
;
79 fprintf(stderr
, "git> ");
80 if (git_read_line_interactively(&line
) == EOF
) {
81 fprintf(stderr
, "\n");
82 strbuf_release(&line
);
85 rawargs
= strbuf_detach(&line
, NULL
);
86 split_args
= xstrdup(rawargs
);
87 count
= split_cmdline(split_args
, &argv
);
89 fprintf(stderr
, "invalid command format '%s': %s\n", rawargs
,
90 split_cmdline_strerror(count
));
97 if (!strcmp(prog
, "")) {
98 } else if (!strcmp(prog
, "quit") || !strcmp(prog
, "logout") ||
99 !strcmp(prog
, "exit") || !strcmp(prog
, "bye")) {
101 } else if (is_valid_cmd_name(prog
)) {
102 full_cmd
= make_cmd(prog
);
104 code
= run_command_v_opt(argv
, RUN_SILENT_EXEC_FAILURE
);
105 if (code
== -1 && errno
== ENOENT
) {
106 fprintf(stderr
, "unrecognized command '%s'\n", prog
);
110 fprintf(stderr
, "invalid command format '%s'\n", prog
);
118 static struct commands
{
120 int (*exec
)(const char *me
, char *arg
);
122 { "git-receive-pack", do_generic_cmd
},
123 { "git-upload-pack", do_generic_cmd
},
124 { "git-upload-archive", do_generic_cmd
},
128 int cmd_main(int argc
, const char **argv
)
131 const char **user_argv
;
132 struct commands
*cmd
;
136 * Special hack to pretend to be a CVS server
138 if (argc
== 2 && !strcmp(argv
[1], "cvs server")) {
140 } else if (argc
== 1) {
141 /* Allow the user to run an interactive shell */
143 if (access(COMMAND_DIR
, R_OK
| X_OK
) == -1) {
144 die("Interactive git shell is not enabled.\n"
145 "hint: ~/" COMMAND_DIR
" should exist "
146 "and have read and execute access.");
150 } else if (argc
!= 3 || strcmp(argv
[1], "-c")) {
152 * We do not accept any other modes except "-c" followed by
153 * "cmd arg", where "cmd" is a very limited subset of git
154 * commands or a command in the COMMAND_DIR
156 die("Run with no arguments or with -c cmd");
159 prog
= xstrdup(argv
[2]);
160 if (!strncmp(prog
, "git", 3) && isspace(prog
[3]))
161 /* Accept "git foo" as if the caller said "git-foo". */
164 for (cmd
= cmd_list
; cmd
->name
; cmd
++) {
165 int len
= strlen(cmd
->name
);
167 if (strncmp(cmd
->name
, prog
, len
))
175 arg
= prog
+ len
+ 1;
180 return cmd
->exec(cmd
->name
, arg
);
184 count
= split_cmdline(prog
, &user_argv
);
186 if (is_valid_cmd_name(user_argv
[0])) {
187 prog
= make_cmd(user_argv
[0]);
189 execv(user_argv
[0], (char *const *) user_argv
);
193 die("unrecognized command '%s'", argv
[2]);
196 die("invalid command format '%s': %s", argv
[2],
197 split_cmdline_strerror(count
));