ash: allocate line editing structure only if needed
function old new delta optschanged 91 128 +37 historycmd 13 17 +4 setcmd 80 78 -2 ash_main 1167 1150 -17 options 576 552 -24 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 2/3 up/down: 41/-43) Total: -2 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko
parent
6eb6e6a1e9
commit
897475ab02
81
shell/ash.c
81
shell/ash.c
@ -315,9 +315,16 @@ static const char *const optletters_optnames[] = {
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"e" "errexit",
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"f" "noglob",
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"I" "ignoreeof",
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/* The below allows this invocation:
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* ash -c 'set -i; echo $-; sleep 5; echo $-'
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* to be ^C-ed and get to interactive ash prompt.
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* bash does not support this "set -i". bash also has no
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* "set -o interactive".
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*/
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"i" "interactive",
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"m" "monitor",
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"n" "noexec",
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/* Ditto: bash has no "set -s" and "set -o stdin" */
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"s" "stdin",
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"x" "xtrace",
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"v" "verbose",
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@ -334,10 +341,25 @@ static const char *const optletters_optnames[] = {
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,"\0" "debug"
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#endif
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};
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//bash 4.4.23 also has these opts (with these defaults):
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//braceexpand on
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//emacs on
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//errtrace off
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//functrace off
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//hashall on
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//histexpand off
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//history on
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//interactive-comments on
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//keyword off
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//onecmd off
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//physical off
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//posix off
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//privileged off
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#define optletters(n) optletters_optnames[n][0]
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#define optnames(n) (optletters_optnames[n] + 1)
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enum { NOPTS = ARRAY_SIZE(optletters_optnames) };
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@ -9514,8 +9536,8 @@ setinteractive(int on)
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setsignal(SIGINT);
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setsignal(SIGQUIT);
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setsignal(SIGTERM);
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#if !ENABLE_FEATURE_SH_EXTRA_QUIET
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if (is_interactive > 1) {
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#if !ENABLE_FEATURE_SH_EXTRA_QUIET
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/* Looks like they want an interactive shell */
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static smallint did_banner;
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@ -9529,8 +9551,12 @@ setinteractive(int on)
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);
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did_banner = 1;
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}
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}
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#endif
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#if ENABLE_FEATURE_EDITING
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if (!line_input_state)
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line_input_state = new_line_input_t(FOR_SHELL | WITH_PATH_LOOKUP);
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#endif
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}
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}
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static void
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@ -9542,10 +9568,12 @@ optschanged(void)
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setinteractive(iflag);
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setjobctl(mflag);
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#if ENABLE_FEATURE_EDITING_VI
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if (line_input_state) {
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if (viflag)
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line_input_state->flags |= VI_MODE;
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else
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line_input_state->flags &= ~VI_MODE;
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}
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#else
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viflag = 0; /* forcibly keep the option off */
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#endif
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@ -10519,14 +10547,12 @@ preadfd(void)
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else {
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# if ENABLE_ASH_IDLE_TIMEOUT
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int timeout = -1;
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if (iflag) {
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const char *tmout_var = lookupvar("TMOUT");
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if (tmout_var) {
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timeout = atoi(tmout_var) * 1000;
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if (timeout <= 0)
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timeout = -1;
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}
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}
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line_input_state->timeout = timeout;
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# endif
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# if ENABLE_FEATURE_TAB_COMPLETION
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@ -11086,14 +11112,17 @@ setoption(int flag, int val)
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ash_msg_and_raise_error("illegal option %c%c", val ? '-' : '+', flag);
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/* NOTREACHED */
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}
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/* If login_sh is not NULL, we are called to parse command line opts,
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* not "set -opts"
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*/
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static int
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options(int cmdline, int *login_sh)
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options(int *login_sh)
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{
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char *p;
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int val;
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int c;
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if (cmdline)
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if (login_sh)
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minusc = NULL;
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while ((p = *argptr) != NULL) {
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c = *p++;
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@ -11104,7 +11133,7 @@ options(int cmdline, int *login_sh)
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if (c == '-') {
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val = 1;
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if (p[0] == '\0' || LONE_DASH(p)) {
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if (!cmdline) {
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if (!login_sh) {
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/* "-" means turn off -x and -v */
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if (p[0] == '\0')
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xflag = vflag = 0;
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@ -11117,26 +11146,31 @@ options(int cmdline, int *login_sh)
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}
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/* first char was + or - */
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while ((c = *p++) != '\0') {
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if (login_sh) {
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/* bash 3.2 indeed handles -c CMD and +c CMD the same */
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if (c == 'c' && cmdline) {
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if (c == 'c') {
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minusc = p; /* command is after shell args */
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} else if (c == 'o') {
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continue;
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}
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if (c == 'l') {
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*login_sh = 1; /* -l or +l == --login */
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continue;
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}
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/* bash does not accept +-login, we also won't */
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if (val && (c == '-')) { /* long options */
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if (strcmp(p, "login") == 0) {
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*login_sh = 1;
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}
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break;
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}
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}
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if (c == 'o') {
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if (plus_minus_o(*argptr, val)) {
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/* it already printed err message */
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return 1; /* error */
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}
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if (*argptr)
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argptr++;
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} else if (cmdline && (c == 'l')) { /* -l or +l == --login */
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if (login_sh)
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*login_sh = 1;
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/* bash does not accept +-login, we also won't */
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} else if (cmdline && val && (c == '-')) { /* long options */
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if (strcmp(p, "login") == 0) {
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if (login_sh)
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*login_sh = 1;
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}
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break;
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} else {
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setoption(c, val);
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}
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@ -11227,7 +11261,7 @@ setcmd(int argc UNUSED_PARAM, char **argv UNUSED_PARAM)
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return showvars(nullstr, 0, VUNSET);
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INT_OFF;
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retval = options(/*cmdline:*/ 0, NULL);
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retval = options(/*login_sh:*/ NULL);
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if (retval == 0) { /* if no parse error... */
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optschanged();
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if (*argptr != NULL) {
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@ -13685,6 +13719,7 @@ helpcmd(int argc UNUSED_PARAM, char **argv UNUSED_PARAM)
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static int FAST_FUNC
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historycmd(int argc UNUSED_PARAM, char **argv UNUSED_PARAM)
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{
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if (line_input_state)
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show_history(line_input_state);
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return EXIT_SUCCESS;
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}
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@ -14001,6 +14036,7 @@ exitshell(void)
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int status;
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#if ENABLE_FEATURE_EDITING_SAVE_ON_EXIT
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if (line_input_state)
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save_history(line_input_state);
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#endif
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status = exitstatus;
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@ -14123,7 +14159,7 @@ procargs(char **argv)
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argptr = xargv;
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for (i = 0; i < NOPTS; i++)
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optlist[i] = 2;
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if (options(/*cmdline:*/ 1, &login_sh)) {
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if (options(&login_sh)) {
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/* it already printed err message */
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raise_exception(EXERROR);
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}
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@ -14249,9 +14285,6 @@ int ash_main(int argc UNUSED_PARAM, char **argv)
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monitor(4, etext, profile_buf, sizeof(profile_buf), 50);
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#endif
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#if ENABLE_FEATURE_EDITING
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line_input_state = new_line_input_t(FOR_SHELL | WITH_PATH_LOOKUP);
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#endif
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state = 0;
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if (setjmp(jmploc.loc)) {
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smallint e;
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