1 /* $OpenBSD: control.c,v 1.25 2019/12/12 11:39:56 nicm Exp $ */ 2 3 /* 4 * Copyright (c) 2012 Nicholas Marriott <nicholas.marriott@gmail.com> 5 * Copyright (c) 2012 George Nachman <tmux@georgester.com> 6 * 7 * Permission to use, copy, modify, and distribute this software for any 8 * purpose with or without fee is hereby granted, provided that the above 9 * copyright notice and this permission notice appear in all copies. 10 * 11 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 12 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 13 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 14 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 15 * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER 16 * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING 17 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 18 */ 19 20 #include <sys/types.h> 21 22 #include <event.h> 23 #include <stdlib.h> 24 #include <string.h> 25 #include <time.h> 26 27 #include "tmux.h" 28 29 /* Write a line. */ 30 void 31 control_write(struct client *c, const char *fmt, ...) 32 { 33 va_list ap; 34 35 va_start(ap, fmt); 36 file_vprint(c, fmt, ap); 37 file_print(c, "\n"); 38 va_end(ap); 39 } 40 41 /* Control error callback. */ 42 static enum cmd_retval 43 control_error(struct cmdq_item *item, void *data) 44 { 45 struct client *c = item->client; 46 char *error = data; 47 48 cmdq_guard(item, "begin", 1); 49 control_write(c, "parse error: %s", error); 50 cmdq_guard(item, "error", 1); 51 52 free(error); 53 return (CMD_RETURN_NORMAL); 54 } 55 56 /* Control input callback. Read lines and fire commands. */ 57 static void 58 control_callback(__unused struct client *c, __unused const char *path, 59 int error, int closed, struct evbuffer *buffer, __unused void *data) 60 { 61 char *line; 62 struct cmdq_item *item; 63 struct cmd_parse_result *pr; 64 65 if (closed || error != 0) 66 c->flags |= CLIENT_EXIT; 67 68 for (;;) { 69 line = evbuffer_readln(buffer, NULL, EVBUFFER_EOL_LF); 70 if (line == NULL) 71 break; 72 log_debug("%s: %s", __func__, line); 73 if (*line == '\0') { /* empty line exit */ 74 free(line); 75 c->flags |= CLIENT_EXIT; 76 break; 77 } 78 79 pr = cmd_parse_from_string(line, NULL); 80 switch (pr->status) { 81 case CMD_PARSE_EMPTY: 82 break; 83 case CMD_PARSE_ERROR: 84 item = cmdq_get_callback(control_error, pr->error); 85 cmdq_append(c, item); 86 break; 87 case CMD_PARSE_SUCCESS: 88 item = cmdq_get_command(pr->cmdlist, NULL, NULL, 0); 89 item->shared->flags |= CMDQ_SHARED_CONTROL; 90 cmdq_append(c, item); 91 cmd_list_free(pr->cmdlist); 92 break; 93 } 94 95 free(line); 96 } 97 } 98 99 void 100 control_start(struct client *c) 101 { 102 file_read(c, "-", control_callback, c); 103 104 if (c->flags & CLIENT_CONTROLCONTROL) 105 file_print(c, "\033P1000p"); 106 } 107