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Annotation of src/usr.bin/tmux/cmd-if-shell.c, Revision 1.6

1.6     ! nicm        1: /* $OpenBSD: cmd-if-shell.c,v 1.5 2009/10/11 09:10:57 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:
1.6     ! nicm       68:        job = job_add(NULL, 0, NULL,
1.5       nicm       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:
1.6     ! nicm       83:        if (!WIFEXITED(job->status) || WEXITSTATUS(job->status) != 0)
1.5       nicm       84:                return;
1.1       nicm       85:
1.5       nicm       86:        if (cmd_string_parse(cdata->cmd, &cmdlist, &cause) != 0) {
1.1       nicm       87:                if (cause != NULL) {
                     88:                        ctx->error(ctx, "%s", cause);
                     89:                        xfree(cause);
                     90:                }
1.5       nicm       91:                return;
1.1       nicm       92:        }
                     93:
                     94:        if (cmd_list_exec(cmdlist, ctx) < 0) {
                     95:                cmd_list_free(cmdlist);
1.5       nicm       96:                return;
1.1       nicm       97:        }
                     98:
                     99:        cmd_list_free(cmdlist);
                    100: }
                    101:
                    102: void
1.5       nicm      103: cmd_if_shell_free(void *data)
1.1       nicm      104: {
1.5       nicm      105:        struct cmd_if_shell_data        *cdata = data;
                    106:        struct cmd_ctx                  *ctx = &cdata->ctx;
1.1       nicm      107:
1.5       nicm      108:        if (ctx->cmdclient != NULL) {
                    109:                ctx->cmdclient->references--;
                    110:                server_write_client(ctx->cmdclient, MSG_EXIT, NULL, 0);
                    111:        }
                    112:        if (ctx->curclient != NULL)
                    113:                ctx->curclient->references--;
1.1       nicm      114:
1.5       nicm      115:        xfree(cdata->cmd);
                    116:        xfree(cdata);
1.1       nicm      117: }