ash: fix TMOUT not restoring tty attributes
function old new delta pgetc 420 500 +80 readtoken1 3202 3239 +37 read_line_input 3316 3337 +21 udhcpc_main 2610 2630 +20 file_get 266 272 +6 expandarg 958 963 +5 localcmd 257 259 +2 addLines 85 87 +2 read_line 94 95 +1 ed_main 2540 2541 +1 timed_out 1 - -1 lineedit_read_key 256 255 -1 alrm_sighandler 44 - -44 cmdloop 539 434 -105 ------------------------------------------------------------------------------ (add/remove: 0/2 grow/shrink: 10/2 up/down: 175/-151) Total: 24 bytes text data bss dec hex filename 887379 936 17200 905515 dd12b busybox_old 887411 936 17192 905539 dd143 busybox_unstripped Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko
parent
dd807c16f9
commit
66c5b12dbf
@ -129,7 +129,7 @@ static void doCommands(void)
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* 0 on ctrl-C,
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* >0 length of input string, including terminating '\n'
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*/
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len = read_line_input(": ", buf, sizeof(buf), NULL);
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len = read_line_input(NULL, ": ", buf, sizeof(buf), /*timeout*/ -1);
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if (len <= 0)
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return;
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endbuf = &buf[len - 1];
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@ -227,7 +227,7 @@ static void doCommands(void)
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}
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if (!dirty)
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return;
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len = read_line_input("Really quit? ", buf, 16, NULL);
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len = read_line_input(NULL, "Really quit? ", buf, 16, /*timeout*/ -1);
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/* read error/EOF - no way to continue */
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if (len < 0)
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return;
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@ -541,7 +541,7 @@ static void addLines(int num)
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* 0 on ctrl-C,
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* >0 length of input string, including terminating '\n'
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*/
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len = read_line_input("", buf, sizeof(buf), NULL);
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len = read_line_input(NULL, "", buf, sizeof(buf), /*timeout*/ -1);
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if (len <= 0) {
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/* Previously, ctrl-C was exiting to shell.
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* Now we exit to ed prompt. Is in important? */
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@ -1403,12 +1403,11 @@ line_input_t *new_line_input_t(int flags) FAST_FUNC;
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* 0 on ctrl-C (the line entered is still returned in 'command'),
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* >0 length of input string, including terminating '\n'
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*/
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/* NB: ash has timeout code which can be moved into read_line_input, if needed */
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int read_line_input(const char* prompt, char* command, int maxsize, line_input_t *state) FAST_FUNC;
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int read_line_input(line_input_t *st, const char *prompt, char *command, int maxsize, int timeout) FAST_FUNC;
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#else
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#define MAX_HISTORY 0
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int read_line_input(const char* prompt, char* command, int maxsize) FAST_FUNC;
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#define read_line_input(prompt, command, maxsize, state) \
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#define read_line_input(state, prompt, command, maxsize, timeout) \
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read_line_input(prompt, command, maxsize)
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#endif
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@ -1809,10 +1809,9 @@ static void win_changed(int nsig)
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errno = sv_errno;
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}
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static int lineedit_read_key(char *read_key_buffer)
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static int lineedit_read_key(char *read_key_buffer, int timeout)
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{
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int64_t ic;
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int timeout = -1;
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#if ENABLE_UNICODE_SUPPORT
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char unicode_buf[MB_CUR_MAX + 1];
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int unicode_idx = 0;
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@ -1917,7 +1916,7 @@ static int isrtl_str(void)
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* 0 on ctrl-C (the line entered is still returned in 'command'),
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* >0 length of input string, including terminating '\n'
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*/
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int FAST_FUNC read_line_input(const char *prompt, char *command, int maxsize, line_input_t *st)
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int FAST_FUNC read_line_input(line_input_t *st, const char *prompt, char *command, int maxsize, int timeout)
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{
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int len;
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#if ENABLE_FEATURE_TAB_COMPLETION
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@ -1991,7 +1990,6 @@ int FAST_FUNC read_line_input(const char *prompt, char *command, int maxsize, li
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new_settings.c_cc[VINTR] = _POSIX_VDISABLE;
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tcsetattr_stdin_TCSANOW(&new_settings);
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/* Now initialize things */
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previous_SIGWINCH_handler = signal(SIGWINCH, win_changed);
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win_changed(0); /* do initial resizing */
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#if ENABLE_USERNAME_OR_HOMEDIR
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@ -2033,7 +2031,7 @@ int FAST_FUNC read_line_input(const char *prompt, char *command, int maxsize, li
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int32_t ic, ic_raw;
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fflush_all();
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ic = ic_raw = lineedit_read_key(read_key_buffer);
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ic = ic_raw = lineedit_read_key(read_key_buffer, timeout);
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#if ENABLE_FEATURE_EDITING_VI
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newdelflag = 1;
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@ -2194,7 +2192,7 @@ int FAST_FUNC read_line_input(const char *prompt, char *command, int maxsize, li
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case 'd'|VI_CMDMODE_BIT: {
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int nc, sc;
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ic = lineedit_read_key(read_key_buffer);
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ic = lineedit_read_key(read_key_buffer, timeout);
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if (errno) /* error */
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goto return_error_indicator;
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if (ic == ic_raw) { /* "cc", "dd" */
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@ -2258,7 +2256,7 @@ int FAST_FUNC read_line_input(const char *prompt, char *command, int maxsize, li
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break;
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case 'r'|VI_CMDMODE_BIT:
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//FIXME: unicode case?
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ic = lineedit_read_key(read_key_buffer);
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ic = lineedit_read_key(read_key_buffer, timeout);
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if (errno) /* error */
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goto return_error_indicator;
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if (ic < ' ' || ic > 255) {
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73
shell/ash.c
73
shell/ash.c
@ -102,8 +102,7 @@
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//config: default n
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//config: depends on ASH
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//config: help
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//config: Enables bash-like auto-logout after "$TMOUT" seconds
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//config: of idle time.
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//config: Enables bash-like auto-logout after $TMOUT seconds of idle time.
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//config:
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//config:config ASH_JOB_CONTROL
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//config: bool "Job control"
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@ -408,6 +407,9 @@ static const char *var_end(const char *var)
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/* ============ Interrupts / exceptions */
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static void exitshell(void) NORETURN;
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/*
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* These macros allow the user to suspend the handling of interrupt signals
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* over a period of time. This is similar to SIGHOLD or to sigblock, but
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@ -9573,10 +9575,21 @@ preadfd(void)
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if (!iflag || g_parsefile->pf_fd != STDIN_FILENO)
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nr = nonblock_safe_read(g_parsefile->pf_fd, buf, IBUFSIZ - 1);
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else {
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int timeout = -1;
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# if ENABLE_ASH_IDLE_TIMEOUT
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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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# endif
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# if ENABLE_FEATURE_TAB_COMPLETION
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line_input_state->path_lookup = pathval();
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# endif
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nr = read_line_input(cmdedit_prompt, buf, IBUFSIZ, line_input_state);
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nr = read_line_input(line_input_state, cmdedit_prompt, buf, IBUFSIZ, timeout);
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if (nr == 0) {
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/* Ctrl+C pressed */
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if (trap[SIGINT]) {
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@ -9587,9 +9600,17 @@ preadfd(void)
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}
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goto retry;
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}
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if (nr < 0 && errno == 0) {
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/* Ctrl+D pressed */
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nr = 0;
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if (nr < 0) {
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if (errno == 0) {
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/* Ctrl+D pressed */
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nr = 0;
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}
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# if ENABLE_ASH_IDLE_TIMEOUT
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else if (errno == EAGAIN && timeout > 0) {
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printf("\007timed out waiting for input: auto-logout\n");
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exitshell();
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}
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# endif
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}
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}
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#else
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@ -12056,23 +12077,6 @@ evalcmd(int argc UNUSED_PARAM, char **argv)
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return exitstatus;
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}
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#if ENABLE_ASH_IDLE_TIMEOUT
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static smallint timed_out;
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static void alrm_sighandler(int sig UNUSED_PARAM)
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{
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/* Close stdin, making interactive command reading stop.
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* Otherwise, timeout doesn't trigger until <Enter> is pressed.
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*/
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int sv = errno;
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close(0);
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open("/dev/null", O_RDONLY);
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errno = sv;
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timed_out = 1;
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}
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#endif
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/*
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* Read and execute commands.
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* "Top" is nonzero for the top level command loop;
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@ -12089,20 +12093,6 @@ cmdloop(int top)
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TRACE(("cmdloop(%d) called\n", top));
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for (;;) {
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int skip;
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#if ENABLE_ASH_IDLE_TIMEOUT
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int tmout_seconds = 0;
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if (top && iflag) {
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const char *tmout_var = lookupvar("TMOUT");
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if (tmout_var) {
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tmout_seconds = atoi(tmout_var);
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if (tmout_seconds > 0) {
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signal(SIGALRM, alrm_sighandler);
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alarm(tmout_seconds);
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}
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}
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}
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#endif
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setstackmark(&smark);
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#if JOBS
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@ -12115,14 +12105,6 @@ cmdloop(int top)
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chkmail();
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}
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n = parsecmd(inter);
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#if ENABLE_ASH_IDLE_TIMEOUT
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if (timed_out) {
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printf("\007timed out waiting for input: auto-logout\n");
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break;
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}
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if (tmout_seconds > 0)
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alarm(0);
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#endif
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#if DEBUG
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if (DEBUG > 2 && debug && (n != NODE_EOF))
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showtree(n);
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@ -12850,7 +12832,6 @@ ulimitcmd(int argc UNUSED_PARAM, char **argv)
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/*
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* Called to exit the shell.
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*/
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static void exitshell(void) NORETURN;
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static void
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exitshell(void)
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{
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@ -1902,7 +1902,7 @@ static void get_user_input(struct in_str *i)
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G.flag_SIGINT = 0;
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/* buglet: SIGINT will not make new prompt to appear _at once_,
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* only after <Enter>. (^C will work) */
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r = read_line_input(prompt_str, G.user_input_buf, CONFIG_FEATURE_EDITING_MAX_LEN-1, G.line_input_state);
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r = read_line_input(G.line_input_state, prompt_str, G.user_input_buf, CONFIG_FEATURE_EDITING_MAX_LEN-1, /*timeout*/ -1);
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/* catch *SIGINT* etc (^C is handled by read_line_input) */
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check_and_run_traps(0);
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} while (r == 0 || G.flag_SIGINT); /* repeat if ^C or SIGINT */
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@ -548,7 +548,7 @@ read_line(const char *prompt)
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{
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int sz;
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sz = read_line_input(prompt, line_buffer, sizeof(line_buffer), NULL);
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sz = read_line_input(NULL, prompt, line_buffer, sizeof(line_buffer), /*timeout*/ -1);
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if (sz <= 0)
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exit(EXIT_SUCCESS); /* Ctrl-D or Ctrl-C */
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