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Annotation of src/usr.bin/tmux/control.c, Revision 1.2

1.2     ! nicm        1: /* $OpenBSD: control.c,v 1.1 2012/06/18 13:16:42 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: void printflike2 control_write(struct client *, const char *, ...);
                     32:
                     33: /* Command error callback. */
                     34: void printflike2
                     35: control_msg_error(struct cmd_ctx *ctx, const char *fmt, ...)
                     36: {
                     37:        struct client   *c = ctx->curclient;
                     38:        va_list          ap;
                     39:
                     40:        va_start(ap, fmt);
                     41:        evbuffer_add_vprintf(c->stdout_data, fmt, ap);
                     42:        va_end(ap);
                     43:
                     44:        evbuffer_add(c->stdout_data, "\n", 1);
                     45:        server_push_stdout(c);
                     46: }
                     47:
                     48: /* Command print callback. */
                     49: void printflike2
                     50: control_msg_print(struct cmd_ctx *ctx, const char *fmt, ...)
                     51: {
                     52:        struct client   *c = ctx->curclient;
                     53:        va_list          ap;
                     54:
                     55:        va_start(ap, fmt);
                     56:        evbuffer_add_vprintf(c->stdout_data, fmt, ap);
                     57:        va_end(ap);
                     58:
                     59:        evbuffer_add(c->stdout_data, "\n", 1);
                     60:        server_push_stdout(c);
                     61: }
                     62:
                     63: /* Command info callback. */
                     64: void printflike2
                     65: control_msg_info(unused struct cmd_ctx *ctx, unused const char *fmt, ...)
                     66: {
                     67: }
                     68:
                     69: /* Write a line. */
                     70: void printflike2
                     71: control_write(struct client *c, const char *fmt, ...)
                     72: {
                     73:        va_list          ap;
                     74:
                     75:        va_start(ap, fmt);
                     76:        evbuffer_add_vprintf(c->stdout_data, fmt, ap);
                     77:        va_end(ap);
                     78:
                     79:        evbuffer_add(c->stdout_data, "\n", 1);
                     80:        server_push_stdout(c);
                     81: }
                     82:
                     83: /* Control input callback. Read lines and fire commands. */
                     84: void
                     85: control_callback(struct client *c, int closed, unused void *data)
                     86: {
                     87:        char            *line, *cause;
                     88:        struct cmd_ctx   ctx;
                     89:        struct cmd_list *cmdlist;
                     90:
                     91:        if (closed)
                     92:                c->flags |= CLIENT_EXIT;
                     93:
                     94:        for (;;) {
                     95:                line = evbuffer_readln(c->stdin_data, NULL, EVBUFFER_EOL_LF);
                     96:                if (line == NULL)
                     97:                        break;
                     98:                if (*line == '\0') { /* empty line exit */
                     99:                        c->flags |= CLIENT_EXIT;
                    100:                        break;
                    101:                }
                    102:
                    103:                ctx.msgdata = NULL;
                    104:                ctx.cmdclient = NULL;
                    105:                ctx.curclient = c;
                    106:
                    107:                ctx.error = control_msg_error;
                    108:                ctx.print = control_msg_print;
                    109:                ctx.info = control_msg_info;
                    110:
                    111:                if (cmd_string_parse(line, &cmdlist, &cause) != 0) {
                    112:                        control_write(c, "%%error in line \"%s\": %s", line,
                    113:                            cause);
1.2     ! nicm      114:                        free(cause);
1.1       nicm      115:                } else {
                    116:                        cmd_list_exec(cmdlist, &ctx);
                    117:                        cmd_list_free(cmdlist);
                    118:                }
                    119:
1.2     ! nicm      120:                free(line);
1.1       nicm      121:        }
                    122: }