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Annotation of src/usr.bin/tmux/control.c, Revision 1.3

1.3     ! nicm        1: /* $OpenBSD: control.c,v 1.2 2012/07/10 11:53:01 nicm Exp $ */
1.1       nicm        2:
                      3: /*
                      4:  * Copyright (c) 2012 Nicholas Marriott <nicm@users.sourceforge.net>
                      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>
1.2       nicm       23: #include <stdlib.h>
1.1       nicm       24: #include <string.h>
                     25:
                     26: #include "tmux.h"
                     27:
                     28: void printflike2 control_msg_error(struct cmd_ctx *, const char *, ...);
                     29: void printflike2 control_msg_print(struct cmd_ctx *, const char *, ...);
                     30: void printflike2 control_msg_info(struct cmd_ctx *, const char *, ...);
                     31:
                     32: /* Command error callback. */
                     33: void printflike2
                     34: control_msg_error(struct cmd_ctx *ctx, const char *fmt, ...)
                     35: {
                     36:        struct client   *c = ctx->curclient;
                     37:        va_list          ap;
                     38:
                     39:        va_start(ap, fmt);
                     40:        evbuffer_add_vprintf(c->stdout_data, fmt, ap);
                     41:        va_end(ap);
                     42:
                     43:        evbuffer_add(c->stdout_data, "\n", 1);
                     44:        server_push_stdout(c);
                     45: }
                     46:
                     47: /* Command print callback. */
                     48: void printflike2
                     49: control_msg_print(struct cmd_ctx *ctx, const char *fmt, ...)
                     50: {
                     51:        struct client   *c = ctx->curclient;
                     52:        va_list          ap;
                     53:
                     54:        va_start(ap, fmt);
                     55:        evbuffer_add_vprintf(c->stdout_data, fmt, ap);
                     56:        va_end(ap);
                     57:
                     58:        evbuffer_add(c->stdout_data, "\n", 1);
                     59:        server_push_stdout(c);
                     60: }
                     61:
                     62: /* Command info callback. */
                     63: void printflike2
                     64: control_msg_info(unused struct cmd_ctx *ctx, unused const char *fmt, ...)
                     65: {
                     66: }
                     67:
                     68: /* Write a line. */
                     69: void printflike2
                     70: control_write(struct client *c, const char *fmt, ...)
                     71: {
                     72:        va_list          ap;
                     73:
                     74:        va_start(ap, fmt);
                     75:        evbuffer_add_vprintf(c->stdout_data, fmt, ap);
                     76:        va_end(ap);
                     77:
                     78:        evbuffer_add(c->stdout_data, "\n", 1);
                     79:        server_push_stdout(c);
                     80: }
                     81:
                     82: /* Control input callback. Read lines and fire commands. */
                     83: void
                     84: control_callback(struct client *c, int closed, unused void *data)
                     85: {
                     86:        char            *line, *cause;
                     87:        struct cmd_ctx   ctx;
                     88:        struct cmd_list *cmdlist;
                     89:
                     90:        if (closed)
                     91:                c->flags |= CLIENT_EXIT;
                     92:
                     93:        for (;;) {
                     94:                line = evbuffer_readln(c->stdin_data, NULL, EVBUFFER_EOL_LF);
                     95:                if (line == NULL)
                     96:                        break;
                     97:                if (*line == '\0') { /* empty line exit */
                     98:                        c->flags |= CLIENT_EXIT;
                     99:                        break;
                    100:                }
                    101:
                    102:                ctx.msgdata = NULL;
                    103:                ctx.cmdclient = NULL;
                    104:                ctx.curclient = c;
                    105:
                    106:                ctx.error = control_msg_error;
                    107:                ctx.print = control_msg_print;
                    108:                ctx.info = control_msg_info;
                    109:
                    110:                if (cmd_string_parse(line, &cmdlist, &cause) != 0) {
                    111:                        control_write(c, "%%error in line \"%s\": %s", line,
                    112:                            cause);
1.2       nicm      113:                        free(cause);
1.1       nicm      114:                } else {
                    115:                        cmd_list_exec(cmdlist, &ctx);
                    116:                        cmd_list_free(cmdlist);
                    117:                }
                    118:
1.2       nicm      119:                free(line);
1.1       nicm      120:        }
                    121: }