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Annotation of src/usr.bin/tmux/cmd-if-shell.c, Revision 1.5

1.5     ! nicm        1: /* $OpenBSD: cmd-if-shell.c,v 1.4 2009/09/21 15:32:06 nicm Exp $ */
1.1       nicm        2:
                      3: /*
                      4:  * Copyright (c) 2009 Tiago Cunha <me@tiagocunha.org>
1.5     ! nicm        5:  * Copyright (c) 2009 Nicholas Marriott <nicm@openbsd.org>
1.1       nicm        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>
1.5     ! nicm       21: #include <sys/wait.h>
1.1       nicm       22:
                     23: #include <string.h>
                     24:
                     25: #include "tmux.h"
                     26:
                     27: /*
                     28:  * Executes a tmux command if a shell command returns true.
                     29:  */
                     30:
                     31: int    cmd_if_shell_exec(struct cmd *, struct cmd_ctx *);
                     32:
1.5     ! nicm       33: void   cmd_if_shell_callback(struct job *);
        !            34: void   cmd_if_shell_free(void *);
1.1       nicm       35:
                     36: const struct cmd_entry cmd_if_shell_entry = {
                     37:        "if-shell", "if",
                     38:        "shell-command command",
1.5     ! nicm       39:        CMD_ARG2, 0,
        !            40:        cmd_target_init,
        !            41:        cmd_target_parse,
1.1       nicm       42:        cmd_if_shell_exec,
1.5     ! nicm       43:        cmd_target_free,
        !            44:        cmd_target_print
1.1       nicm       45: };
                     46:
1.5     ! nicm       47: struct cmd_if_shell_data {
        !            48:        char            *cmd;
        !            49:        struct cmd_ctx   ctx;
        !            50: };
1.1       nicm       51:
                     52: int
1.5     ! nicm       53: cmd_if_shell_exec(struct cmd *self, struct cmd_ctx *ctx)
1.1       nicm       54: {
1.5     ! nicm       55:        struct cmd_target_data          *data = self->data;
        !            56:        struct cmd_if_shell_data        *cdata;
        !            57:        struct job                      *job;
        !            58:
        !            59:        cdata = xmalloc(sizeof *cdata);
        !            60:        cdata->cmd = xstrdup(data->arg2);
        !            61:        memcpy(&cdata->ctx, ctx, sizeof cdata->ctx);
        !            62:
        !            63:        if (ctx->cmdclient != NULL)
        !            64:                ctx->cmdclient->references++;
        !            65:        if (ctx->curclient != NULL)
        !            66:                ctx->curclient->references++;
        !            67:
        !            68:        job = job_add(NULL, NULL,
        !            69:            data->arg, cmd_if_shell_callback, cmd_if_shell_free, cdata);
        !            70:        job_run(job);
1.1       nicm       71:
1.5     ! nicm       72:        return (1);     /* don't let client exit */
1.1       nicm       73: }
                     74:
1.5     ! nicm       75: void
        !            76: cmd_if_shell_callback(struct job *job)
1.1       nicm       77: {
1.5     ! nicm       78:        struct cmd_if_shell_data        *cdata = job->data;
        !            79:        struct cmd_ctx                  *ctx = &cdata->ctx;
1.1       nicm       80:        struct cmd_list                 *cmdlist;
                     81:        char                            *cause;
                     82:
1.5     ! nicm       83:        if (!WIFEXITED(job->status) || WEXITSTATUS(job->status) != 0) {
        !            84:                job_free(job);  /* calls cmd_if_shell_free */
        !            85:                return;
        !            86:        }
1.1       nicm       87:
1.5     ! nicm       88:        if (cmd_string_parse(cdata->cmd, &cmdlist, &cause) != 0) {
1.1       nicm       89:                if (cause != NULL) {
                     90:                        ctx->error(ctx, "%s", cause);
                     91:                        xfree(cause);
                     92:                }
1.5     ! nicm       93:                return;
1.1       nicm       94:        }
                     95:
                     96:        if (cmd_list_exec(cmdlist, ctx) < 0) {
                     97:                cmd_list_free(cmdlist);
1.5     ! nicm       98:                return;
1.1       nicm       99:        }
                    100:
                    101:        cmd_list_free(cmdlist);
                    102: }
                    103:
                    104: void
1.5     ! nicm      105: cmd_if_shell_free(void *data)
1.1       nicm      106: {
1.5     ! nicm      107:        struct cmd_if_shell_data        *cdata = data;
        !           108:        struct cmd_ctx                  *ctx = &cdata->ctx;
1.1       nicm      109:
1.5     ! nicm      110:        if (ctx->cmdclient != NULL) {
        !           111:                ctx->cmdclient->references--;
        !           112:                server_write_client(ctx->cmdclient, MSG_EXIT, NULL, 0);
        !           113:        }
        !           114:        if (ctx->curclient != NULL)
        !           115:                ctx->curclient->references--;
1.1       nicm      116:
1.5     ! nicm      117:        xfree(cdata->cmd);
        !           118:        xfree(cdata);
1.1       nicm      119: }