X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=miscutils%2Fchat.c;h=2dfe52c4f047f11dbad421d24c52b0d38dba3e14;hb=9b70f197b4dd5be47c5d0d4479525efe012964ee;hp=2040c3f6a467b3e0334904162dec662358116f25;hpb=0ef64bdb40c54681e8dd5ab8df42ac88e4ab1d4a;p=oweals%2Fbusybox.git diff --git a/miscutils/chat.c b/miscutils/chat.c index 2040c3f6a..2dfe52c4f 100644 --- a/miscutils/chat.c +++ b/miscutils/chat.c @@ -7,10 +7,90 @@ * * Licensed under GPLv2, see file LICENSE in this source tree. */ +//config:config CHAT +//config: bool "chat (6.6 kb)" +//config: default y +//config: help +//config: Simple chat utility. +//config: +//config:config FEATURE_CHAT_NOFAIL +//config: bool "Enable NOFAIL expect strings" +//config: depends on CHAT +//config: default y +//config: help +//config: When enabled expect strings which are started with a dash trigger +//config: no-fail mode. That is when expectation is not met within timeout +//config: the script is not terminated but sends next SEND string and waits +//config: for next EXPECT string. This allows to compose far more flexible +//config: scripts. +//config: +//config:config FEATURE_CHAT_TTY_HIFI +//config: bool "Force STDIN to be a TTY" +//config: depends on CHAT +//config: default n +//config: help +//config: Original chat always treats STDIN as a TTY device and sets for it +//config: so-called raw mode. This option turns on such behaviour. +//config: +//config:config FEATURE_CHAT_IMPLICIT_CR +//config: bool "Enable implicit Carriage Return" +//config: depends on CHAT +//config: default y +//config: help +//config: When enabled make chat to terminate all SEND strings with a "\r" +//config: unless "\c" is met anywhere in the string. +//config: +//config:config FEATURE_CHAT_SWALLOW_OPTS +//config: bool "Swallow options" +//config: depends on CHAT +//config: default y +//config: help +//config: Busybox chat require no options. To make it not fail when used +//config: in place of original chat (which has a bunch of options) turn +//config: this on. +//config: +//config:config FEATURE_CHAT_SEND_ESCAPES +//config: bool "Support weird SEND escapes" +//config: depends on CHAT +//config: default y +//config: help +//config: Original chat uses some escape sequences in SEND arguments which +//config: are not sent to device but rather performs special actions. +//config: E.g. "\K" means to send a break sequence to device. +//config: "\d" delays execution for a second, "\p" -- for a 1/100 of second. +//config: Before turning this option on think twice: do you really need them? +//config: +//config:config FEATURE_CHAT_VAR_ABORT_LEN +//config: bool "Support variable-length ABORT conditions" +//config: depends on CHAT +//config: default y +//config: help +//config: Original chat uses fixed 50-bytes length ABORT conditions. Say N here. +//config: +//config:config FEATURE_CHAT_CLR_ABORT +//config: bool "Support revoking of ABORT conditions" +//config: depends on CHAT +//config: default y +//config: help +//config: Support CLR_ABORT directive. + +//applet:IF_CHAT(APPLET(chat, BB_DIR_USR_SBIN, BB_SUID_DROP)) + +//kbuild:lib-$(CONFIG_CHAT) += chat.o + +//usage:#define chat_trivial_usage +//usage: "EXPECT [SEND [EXPECT [SEND...]]]" +//usage:#define chat_full_usage "\n\n" +//usage: "Useful for interacting with a modem connected to stdin/stdout.\n" +//usage: "A script consists of \"expect-send\" argument pairs.\n" +//usage: "Example:\n" +//usage: "chat '' ATZ OK ATD123456 CONNECT '' ogin: pppuser word: ppppass '~'" + #include "libbb.h" +#include "common_bufsiz.h" // default timeout: 45 sec -#define DEFAULT_CHAT_TIMEOUT 45*1000 +#define DEFAULT_CHAT_TIMEOUT 45*1000 // max length of "abort string", // i.e. device reply which causes termination #define MAX_ABORT_LEN 50 @@ -133,6 +213,7 @@ int chat_main(int argc UNUSED_PARAM, char **argv) , signal_handler); #if ENABLE_FEATURE_CHAT_TTY_HIFI +//TODO: use set_termios_to_raw() tcgetattr(STDIN_FILENO, &tio); tio0 = tio; cfmakeraw(&tio); @@ -157,10 +238,18 @@ int chat_main(int argc UNUSED_PARAM, char **argv) , *argv ); if (key >= 0) { + bool onoff; // cache directive value char *arg = *++argv; + + if (!arg) { +#if ENABLE_FEATURE_CHAT_TTY_HIFI + tcsetattr(STDIN_FILENO, TCSAFLUSH, &tio0); +#endif + bb_show_usage(); + } // OFF -> 0, anything else -> 1 - bool onoff = (0 != strcmp("OFF", arg)); + onoff = (0 != strcmp("OFF", arg)); // process directive if (DIR_HANGUP == key) { // turn SIGHUP on/off @@ -175,23 +264,24 @@ int chat_main(int argc UNUSED_PARAM, char **argv) llist_add_to_end(&aborts, arg); #if ENABLE_FEATURE_CHAT_CLR_ABORT } else if (DIR_CLR_ABORT == key) { + llist_t *l; // remove the string from abort conditions // N.B. gotta refresh maximum length too... -#if ENABLE_FEATURE_CHAT_VAR_ABORT_LEN +# if ENABLE_FEATURE_CHAT_VAR_ABORT_LEN max_abort_len = 0; -#endif - for (llist_t *l = aborts; l; l = l->link) { -#if ENABLE_FEATURE_CHAT_VAR_ABORT_LEN +# endif + for (l = aborts; l; l = l->link) { +# if ENABLE_FEATURE_CHAT_VAR_ABORT_LEN size_t len = strlen(l->data); -#endif - if (!strcmp(arg, l->data)) { +# endif + if (strcmp(arg, l->data) == 0) { llist_unlink(&aborts, l); continue; } -#if ENABLE_FEATURE_CHAT_VAR_ABORT_LEN +# if ENABLE_FEATURE_CHAT_VAR_ABORT_LEN if (len > max_abort_len) max_abort_len = len; -#endif +# endif } #endif } else if (DIR_TIMEOUT == key) { @@ -275,9 +365,10 @@ int chat_main(int argc UNUSED_PARAM, char **argv) && poll(&pfd, 1, timeout) > 0 && (pfd.revents & POLLIN) ) { -#define buf bb_common_bufsiz1 llist_t *l; ssize_t delta; +#define buf bb_common_bufsiz1 + setup_common_bufsiz(); // read next char from device if (safe_read(STDIN_FILENO, buf+buf_len, 1) > 0) { @@ -286,7 +377,7 @@ int chat_main(int argc UNUSED_PARAM, char **argv) full_write(record_fd, buf+buf_len, 1); } // dump device input if ECHO ON - if (echo > 0) { + if (echo) { // if (buf[buf_len] < ' ') { // full_write(STDERR_FILENO, "^", 1); // buf[buf_len] += '@';