mirror of
https://github.com/sheumann/hush.git
synced 2024-06-14 09:29:38 +00:00
hush: reorder builtins (cd and pwd ought to be close, etc), no code changes
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko
parent
f35ad3bd12
commit
a1184af5f8
604
shell/hush.c
604
shell/hush.c
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@ -8832,6 +8832,30 @@ static int FAST_FUNC builtin_printf(char **argv)
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}
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#endif
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#if ENABLE_HUSH_HELP
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static int FAST_FUNC builtin_help(char **argv UNUSED_PARAM)
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{
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const struct built_in_command *x;
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printf(
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"Built-in commands:\n"
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"------------------\n");
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for (x = bltins1; x != &bltins1[ARRAY_SIZE(bltins1)]; x++) {
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if (x->b_descr)
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printf("%-10s%s\n", x->b_cmd, x->b_descr);
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}
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return EXIT_SUCCESS;
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}
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#endif
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#if MAX_HISTORY && ENABLE_FEATURE_EDITING
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static int FAST_FUNC builtin_history(char **argv UNUSED_PARAM)
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{
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show_history(G.line_input_state);
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return EXIT_SUCCESS;
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}
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#endif
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static char **skip_dash_dash(char **argv)
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{
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argv++;
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@ -8840,24 +8864,6 @@ static char **skip_dash_dash(char **argv)
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return argv;
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}
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static int FAST_FUNC builtin_eval(char **argv)
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{
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int rcode = EXIT_SUCCESS;
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argv = skip_dash_dash(argv);
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if (*argv) {
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char *str = expand_strvec_to_string(argv);
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/* bash:
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* eval "echo Hi; done" ("done" is syntax error):
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* "echo Hi" will not execute too.
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*/
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parse_and_run_string(str);
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free(str);
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rcode = G.last_exitcode;
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}
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return rcode;
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}
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static int FAST_FUNC builtin_cd(char **argv)
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{
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const char *newdir;
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@ -8885,6 +8891,30 @@ static int FAST_FUNC builtin_cd(char **argv)
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return EXIT_SUCCESS;
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}
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static int FAST_FUNC builtin_pwd(char **argv UNUSED_PARAM)
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{
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puts(get_cwd(0));
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return EXIT_SUCCESS;
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}
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static int FAST_FUNC builtin_eval(char **argv)
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{
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int rcode = EXIT_SUCCESS;
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argv = skip_dash_dash(argv);
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if (*argv) {
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char *str = expand_strvec_to_string(argv);
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/* bash:
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* eval "echo Hi; done" ("done" is syntax error):
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* "echo Hi" will not execute too.
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*/
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parse_and_run_string(str);
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free(str);
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rcode = G.last_exitcode;
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}
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return rcode;
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}
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static int FAST_FUNC builtin_exec(char **argv)
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{
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argv = skip_dash_dash(argv);
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@ -8930,6 +8960,147 @@ static int FAST_FUNC builtin_exit(char **argv)
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hush_exit(xatoi(argv[0]) & 0xff);
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}
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#if ENABLE_HUSH_TYPE
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/* http://www.opengroup.org/onlinepubs/9699919799/utilities/type.html */
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static int FAST_FUNC builtin_type(char **argv)
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{
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int ret = EXIT_SUCCESS;
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while (*++argv) {
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const char *type;
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char *path = NULL;
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if (0) {} /* make conditional compile easier below */
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/*else if (find_alias(*argv))
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type = "an alias";*/
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#if ENABLE_HUSH_FUNCTIONS
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else if (find_function(*argv))
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type = "a function";
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#endif
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else if (find_builtin(*argv))
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type = "a shell builtin";
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else if ((path = find_in_path(*argv)) != NULL)
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type = path;
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else {
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bb_error_msg("type: %s: not found", *argv);
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ret = EXIT_FAILURE;
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continue;
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}
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printf("%s is %s\n", *argv, type);
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free(path);
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}
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return ret;
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}
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#endif
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#if ENABLE_HUSH_READ
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/* Interruptibility of read builtin in bash
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* (tested on bash-4.2.8 by sending signals (not by ^C)):
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*
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* Empty trap makes read ignore corresponding signal, for any signal.
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*
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* SIGINT:
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* - terminates non-interactive shell;
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* - interrupts read in interactive shell;
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* if it has non-empty trap:
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* - executes trap and returns to command prompt in interactive shell;
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* - executes trap and returns to read in non-interactive shell;
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* SIGTERM:
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* - is ignored (does not interrupt) read in interactive shell;
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* - terminates non-interactive shell;
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* if it has non-empty trap:
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* - executes trap and returns to read;
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* SIGHUP:
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* - terminates shell (regardless of interactivity);
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* if it has non-empty trap:
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* - executes trap and returns to read;
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*/
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static int FAST_FUNC builtin_read(char **argv)
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{
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const char *r;
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char *opt_n = NULL;
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char *opt_p = NULL;
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char *opt_t = NULL;
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char *opt_u = NULL;
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const char *ifs;
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int read_flags;
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/* "!": do not abort on errors.
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* Option string must start with "sr" to match BUILTIN_READ_xxx
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*/
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read_flags = getopt32(argv, "!srn:p:t:u:", &opt_n, &opt_p, &opt_t, &opt_u);
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if (read_flags == (uint32_t)-1)
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return EXIT_FAILURE;
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argv += optind;
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ifs = get_local_var_value("IFS"); /* can be NULL */
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again:
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r = shell_builtin_read(set_local_var_from_halves,
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argv,
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ifs,
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read_flags,
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opt_n,
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opt_p,
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opt_t,
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opt_u
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);
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if ((uintptr_t)r == 1 && errno == EINTR) {
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unsigned sig = check_and_run_traps();
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if (sig && sig != SIGINT)
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goto again;
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}
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if ((uintptr_t)r > 1) {
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bb_error_msg("%s", r);
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r = (char*)(uintptr_t)1;
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}
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return (uintptr_t)r;
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}
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#endif
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#if ENABLE_HUSH_UMASK
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static int FAST_FUNC builtin_umask(char **argv)
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{
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int rc;
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mode_t mask;
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rc = 1;
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mask = umask(0);
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argv = skip_dash_dash(argv);
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if (argv[0]) {
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mode_t old_mask = mask;
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/* numeric umasks are taken as-is */
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/* symbolic umasks are inverted: "umask a=rx" calls umask(222) */
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if (!isdigit(argv[0][0]))
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mask ^= 0777;
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mask = bb_parse_mode(argv[0], mask);
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if (!isdigit(argv[0][0]))
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mask ^= 0777;
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if ((unsigned)mask > 0777) {
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mask = old_mask;
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/* bash messages:
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* bash: umask: 'q': invalid symbolic mode operator
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* bash: umask: 999: octal number out of range
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*/
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bb_error_msg("%s: invalid mode '%s'", "umask", argv[0]);
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rc = 0;
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}
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} else {
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/* Mimic bash */
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printf("%04o\n", (unsigned) mask);
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/* fall through and restore mask which we set to 0 */
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}
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umask(mask);
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return !rc; /* rc != 0 - success */
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}
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#endif
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#if ENABLE_HUSH_EXPORT || ENABLE_HUSH_TRAP
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static void print_escaped(const char *s)
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{
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@ -9218,73 +9389,61 @@ static int FAST_FUNC builtin_shift(char **argv)
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return EXIT_FAILURE;
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}
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#if ENABLE_HUSH_READ
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/* Interruptibility of read builtin in bash
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* (tested on bash-4.2.8 by sending signals (not by ^C)):
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*
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* Empty trap makes read ignore corresponding signal, for any signal.
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*
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* SIGINT:
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* - terminates non-interactive shell;
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* - interrupts read in interactive shell;
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* if it has non-empty trap:
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* - executes trap and returns to command prompt in interactive shell;
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* - executes trap and returns to read in non-interactive shell;
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* SIGTERM:
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* - is ignored (does not interrupt) read in interactive shell;
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* - terminates non-interactive shell;
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* if it has non-empty trap:
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* - executes trap and returns to read;
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* SIGHUP:
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* - terminates shell (regardless of interactivity);
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* if it has non-empty trap:
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* - executes trap and returns to read;
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*/
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static int FAST_FUNC builtin_read(char **argv)
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static int FAST_FUNC builtin_source(char **argv)
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{
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const char *r;
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char *opt_n = NULL;
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char *opt_p = NULL;
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char *opt_t = NULL;
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char *opt_u = NULL;
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const char *ifs;
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int read_flags;
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/* "!": do not abort on errors.
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* Option string must start with "sr" to match BUILTIN_READ_xxx
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*/
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read_flags = getopt32(argv, "!srn:p:t:u:", &opt_n, &opt_p, &opt_t, &opt_u);
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if (read_flags == (uint32_t)-1)
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return EXIT_FAILURE;
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argv += optind;
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ifs = get_local_var_value("IFS"); /* can be NULL */
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again:
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r = shell_builtin_read(set_local_var_from_halves,
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argv,
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ifs,
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read_flags,
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opt_n,
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opt_p,
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opt_t,
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opt_u
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);
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if ((uintptr_t)r == 1 && errno == EINTR) {
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unsigned sig = check_and_run_traps();
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if (sig && sig != SIGINT)
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goto again;
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}
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if ((uintptr_t)r > 1) {
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bb_error_msg("%s", r);
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r = (char*)(uintptr_t)1;
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}
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return (uintptr_t)r;
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}
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char *arg_path, *filename;
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FILE *input;
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save_arg_t sv;
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char *args_need_save;
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#if ENABLE_HUSH_FUNCTIONS
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smallint sv_flg;
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#endif
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argv = skip_dash_dash(argv);
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filename = argv[0];
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if (!filename) {
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/* bash says: "bash: .: filename argument required" */
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return 2; /* bash compat */
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}
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arg_path = NULL;
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if (!strchr(filename, '/')) {
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arg_path = find_in_path(filename);
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if (arg_path)
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filename = arg_path;
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}
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input = remember_FILE(fopen_or_warn(filename, "r"));
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free(arg_path);
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if (!input) {
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/* bb_perror_msg("%s", *argv); - done by fopen_or_warn */
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/* POSIX: non-interactive shell should abort here,
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* not merely fail. So far no one complained :)
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*/
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return EXIT_FAILURE;
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}
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#if ENABLE_HUSH_FUNCTIONS
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sv_flg = G_flag_return_in_progress;
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/* "we are inside sourced file, ok to use return" */
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G_flag_return_in_progress = -1;
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#endif
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args_need_save = argv[1]; /* used as a boolean variable */
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if (args_need_save)
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save_and_replace_G_args(&sv, argv);
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/* "false; . ./empty_line; echo Zero:$?" should print 0 */
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G.last_exitcode = 0;
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parse_and_run_file(input);
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fclose_and_forget(input);
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if (args_need_save) /* can't use argv[1] instead: "shift" can mangle it */
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restore_G_args(&sv, argv);
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#if ENABLE_HUSH_FUNCTIONS
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G_flag_return_in_progress = sv_flg;
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#endif
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return G.last_exitcode;
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}
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#if ENABLE_HUSH_TRAP
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static int FAST_FUNC builtin_trap(char **argv)
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{
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|
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@ -9377,41 +9536,6 @@ static int FAST_FUNC builtin_trap(char **argv)
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}
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#endif
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#if ENABLE_HUSH_TYPE
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/* http://www.opengroup.org/onlinepubs/9699919799/utilities/type.html */
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static int FAST_FUNC builtin_type(char **argv)
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{
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int ret = EXIT_SUCCESS;
|
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|
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while (*++argv) {
|
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const char *type;
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char *path = NULL;
|
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|
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if (0) {} /* make conditional compile easier below */
|
||||
/*else if (find_alias(*argv))
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type = "an alias";*/
|
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#if ENABLE_HUSH_FUNCTIONS
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else if (find_function(*argv))
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type = "a function";
|
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#endif
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else if (find_builtin(*argv))
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type = "a shell builtin";
|
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else if ((path = find_in_path(*argv)) != NULL)
|
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type = path;
|
||||
else {
|
||||
bb_error_msg("type: %s: not found", *argv);
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ret = EXIT_FAILURE;
|
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continue;
|
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}
|
||||
|
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printf("%s is %s\n", *argv, type);
|
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free(path);
|
||||
}
|
||||
|
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return ret;
|
||||
}
|
||||
#endif
|
||||
|
||||
#if ENABLE_HUSH_JOB
|
||||
static struct pipe *parse_jobspec(const char *str)
|
||||
{
|
||||
|
|
@ -9441,6 +9565,23 @@ static struct pipe *parse_jobspec(const char *str)
|
|||
return NULL;
|
||||
}
|
||||
|
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static int FAST_FUNC builtin_jobs(char **argv UNUSED_PARAM)
|
||||
{
|
||||
struct pipe *job;
|
||||
const char *status_string;
|
||||
|
||||
checkjobs(NULL, 0 /*(no pid to wait for)*/);
|
||||
for (job = G.job_list; job; job = job->next) {
|
||||
if (job->alive_cmds == job->stopped_cmds)
|
||||
status_string = "Stopped";
|
||||
else
|
||||
status_string = "Running";
|
||||
|
||||
printf(JOB_STATUS_FORMAT, job->jobid, status_string, job->cmdtext);
|
||||
}
|
||||
return EXIT_SUCCESS;
|
||||
}
|
||||
|
||||
/* built-in 'fg' and 'bg' handler */
|
||||
static int FAST_FUNC builtin_fg_bg(char **argv)
|
||||
{
|
||||
|
|
@ -9496,192 +9637,6 @@ static int FAST_FUNC builtin_fg_bg(char **argv)
|
|||
}
|
||||
#endif
|
||||
|
||||
#if ENABLE_HUSH_HELP
|
||||
static int FAST_FUNC builtin_help(char **argv UNUSED_PARAM)
|
||||
{
|
||||
const struct built_in_command *x;
|
||||
|
||||
printf(
|
||||
"Built-in commands:\n"
|
||||
"------------------\n");
|
||||
for (x = bltins1; x != &bltins1[ARRAY_SIZE(bltins1)]; x++) {
|
||||
if (x->b_descr)
|
||||
printf("%-10s%s\n", x->b_cmd, x->b_descr);
|
||||
}
|
||||
return EXIT_SUCCESS;
|
||||
}
|
||||
#endif
|
||||
|
||||
#if MAX_HISTORY && ENABLE_FEATURE_EDITING
|
||||
static int FAST_FUNC builtin_history(char **argv UNUSED_PARAM)
|
||||
{
|
||||
show_history(G.line_input_state);
|
||||
return EXIT_SUCCESS;
|
||||
}
|
||||
#endif
|
||||
|
||||
#if ENABLE_HUSH_JOB
|
||||
static int FAST_FUNC builtin_jobs(char **argv UNUSED_PARAM)
|
||||
{
|
||||
struct pipe *job;
|
||||
const char *status_string;
|
||||
|
||||
checkjobs(NULL, 0 /*(no pid to wait for)*/);
|
||||
for (job = G.job_list; job; job = job->next) {
|
||||
if (job->alive_cmds == job->stopped_cmds)
|
||||
status_string = "Stopped";
|
||||
else
|
||||
status_string = "Running";
|
||||
|
||||
printf(JOB_STATUS_FORMAT, job->jobid, status_string, job->cmdtext);
|
||||
}
|
||||
return EXIT_SUCCESS;
|
||||
}
|
||||
#endif
|
||||
|
||||
#if ENABLE_HUSH_MEMLEAK
|
||||
static int FAST_FUNC builtin_memleak(char **argv UNUSED_PARAM)
|
||||
{
|
||||
void *p;
|
||||
unsigned long l;
|
||||
|
||||
# ifdef M_TRIM_THRESHOLD
|
||||
/* Optional. Reduces probability of false positives */
|
||||
malloc_trim(0);
|
||||
# endif
|
||||
/* Crude attempt to find where "free memory" starts,
|
||||
* sans fragmentation. */
|
||||
p = malloc(240);
|
||||
l = (unsigned long)p;
|
||||
free(p);
|
||||
p = malloc(3400);
|
||||
if (l < (unsigned long)p) l = (unsigned long)p;
|
||||
free(p);
|
||||
|
||||
|
||||
# if 0 /* debug */
|
||||
{
|
||||
struct mallinfo mi = mallinfo();
|
||||
printf("top alloc:0x%lx malloced:%d+%d=%d\n", l,
|
||||
mi.arena, mi.hblkhd, mi.arena + mi.hblkhd);
|
||||
}
|
||||
# endif
|
||||
|
||||
if (!G.memleak_value)
|
||||
G.memleak_value = l;
|
||||
|
||||
l -= G.memleak_value;
|
||||
if ((long)l < 0)
|
||||
l = 0;
|
||||
l /= 1024;
|
||||
if (l > 127)
|
||||
l = 127;
|
||||
|
||||
/* Exitcode is "how many kilobytes we leaked since 1st call" */
|
||||
return l;
|
||||
}
|
||||
#endif
|
||||
|
||||
static int FAST_FUNC builtin_pwd(char **argv UNUSED_PARAM)
|
||||
{
|
||||
puts(get_cwd(0));
|
||||
return EXIT_SUCCESS;
|
||||
}
|
||||
|
||||
static int FAST_FUNC builtin_source(char **argv)
|
||||
{
|
||||
char *arg_path, *filename;
|
||||
FILE *input;
|
||||
save_arg_t sv;
|
||||
char *args_need_save;
|
||||
#if ENABLE_HUSH_FUNCTIONS
|
||||
smallint sv_flg;
|
||||
#endif
|
||||
|
||||
argv = skip_dash_dash(argv);
|
||||
filename = argv[0];
|
||||
if (!filename) {
|
||||
/* bash says: "bash: .: filename argument required" */
|
||||
return 2; /* bash compat */
|
||||
}
|
||||
arg_path = NULL;
|
||||
if (!strchr(filename, '/')) {
|
||||
arg_path = find_in_path(filename);
|
||||
if (arg_path)
|
||||
filename = arg_path;
|
||||
}
|
||||
input = remember_FILE(fopen_or_warn(filename, "r"));
|
||||
free(arg_path);
|
||||
if (!input) {
|
||||
/* bb_perror_msg("%s", *argv); - done by fopen_or_warn */
|
||||
/* POSIX: non-interactive shell should abort here,
|
||||
* not merely fail. So far no one complained :)
|
||||
*/
|
||||
return EXIT_FAILURE;
|
||||
}
|
||||
|
||||
#if ENABLE_HUSH_FUNCTIONS
|
||||
sv_flg = G_flag_return_in_progress;
|
||||
/* "we are inside sourced file, ok to use return" */
|
||||
G_flag_return_in_progress = -1;
|
||||
#endif
|
||||
args_need_save = argv[1]; /* used as a boolean variable */
|
||||
if (args_need_save)
|
||||
save_and_replace_G_args(&sv, argv);
|
||||
|
||||
/* "false; . ./empty_line; echo Zero:$?" should print 0 */
|
||||
G.last_exitcode = 0;
|
||||
parse_and_run_file(input);
|
||||
fclose_and_forget(input);
|
||||
|
||||
if (args_need_save) /* can't use argv[1] instead: "shift" can mangle it */
|
||||
restore_G_args(&sv, argv);
|
||||
#if ENABLE_HUSH_FUNCTIONS
|
||||
G_flag_return_in_progress = sv_flg;
|
||||
#endif
|
||||
|
||||
return G.last_exitcode;
|
||||
}
|
||||
|
||||
#if ENABLE_HUSH_UMASK
|
||||
static int FAST_FUNC builtin_umask(char **argv)
|
||||
{
|
||||
int rc;
|
||||
mode_t mask;
|
||||
|
||||
rc = 1;
|
||||
mask = umask(0);
|
||||
argv = skip_dash_dash(argv);
|
||||
if (argv[0]) {
|
||||
mode_t old_mask = mask;
|
||||
|
||||
/* numeric umasks are taken as-is */
|
||||
/* symbolic umasks are inverted: "umask a=rx" calls umask(222) */
|
||||
if (!isdigit(argv[0][0]))
|
||||
mask ^= 0777;
|
||||
mask = bb_parse_mode(argv[0], mask);
|
||||
if (!isdigit(argv[0][0]))
|
||||
mask ^= 0777;
|
||||
if ((unsigned)mask > 0777) {
|
||||
mask = old_mask;
|
||||
/* bash messages:
|
||||
* bash: umask: 'q': invalid symbolic mode operator
|
||||
* bash: umask: 999: octal number out of range
|
||||
*/
|
||||
bb_error_msg("%s: invalid mode '%s'", "umask", argv[0]);
|
||||
rc = 0;
|
||||
}
|
||||
} else {
|
||||
/* Mimic bash */
|
||||
printf("%04o\n", (unsigned) mask);
|
||||
/* fall through and restore mask which we set to 0 */
|
||||
}
|
||||
umask(mask);
|
||||
|
||||
return !rc; /* rc != 0 - success */
|
||||
}
|
||||
#endif
|
||||
|
||||
#if ENABLE_HUSH_KILL
|
||||
static int FAST_FUNC builtin_kill(char **argv)
|
||||
{
|
||||
|
|
@ -9984,3 +9939,46 @@ static int FAST_FUNC builtin_return(char **argv)
|
|||
return rc;
|
||||
}
|
||||
#endif
|
||||
|
||||
#if ENABLE_HUSH_MEMLEAK
|
||||
static int FAST_FUNC builtin_memleak(char **argv UNUSED_PARAM)
|
||||
{
|
||||
void *p;
|
||||
unsigned long l;
|
||||
|
||||
# ifdef M_TRIM_THRESHOLD
|
||||
/* Optional. Reduces probability of false positives */
|
||||
malloc_trim(0);
|
||||
# endif
|
||||
/* Crude attempt to find where "free memory" starts,
|
||||
* sans fragmentation. */
|
||||
p = malloc(240);
|
||||
l = (unsigned long)p;
|
||||
free(p);
|
||||
p = malloc(3400);
|
||||
if (l < (unsigned long)p) l = (unsigned long)p;
|
||||
free(p);
|
||||
|
||||
|
||||
# if 0 /* debug */
|
||||
{
|
||||
struct mallinfo mi = mallinfo();
|
||||
printf("top alloc:0x%lx malloced:%d+%d=%d\n", l,
|
||||
mi.arena, mi.hblkhd, mi.arena + mi.hblkhd);
|
||||
}
|
||||
# endif
|
||||
|
||||
if (!G.memleak_value)
|
||||
G.memleak_value = l;
|
||||
|
||||
l -= G.memleak_value;
|
||||
if ((long)l < 0)
|
||||
l = 0;
|
||||
l /= 1024;
|
||||
if (l > 127)
|
||||
l = 127;
|
||||
|
||||
/* Exitcode is "how many kilobytes we leaked since 1st call" */
|
||||
return l;
|
||||
}
|
||||
#endif
|
||||
|
|
|
|||
Loading…
Reference in New Issue
Block a user