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Annotation of src/usr.bin/tmux/cmd-if-shell.c, Revision 1.10

1.10    ! nicm        1: /* $OpenBSD: cmd-if-shell.c,v 1.9 2010/07/24 20:11:59 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",
1.10    ! nicm       38:        "", 2, 2,
1.1       nicm       39:        "shell-command command",
1.10    ! nicm       40:        0,
        !            41:        NULL,
        !            42:        NULL,
        !            43:        cmd_if_shell_exec
1.1       nicm       44: };
                     45:
1.5       nicm       46: struct cmd_if_shell_data {
                     47:        char            *cmd;
                     48:        struct cmd_ctx   ctx;
                     49: };
1.1       nicm       50:
                     51: int
1.5       nicm       52: cmd_if_shell_exec(struct cmd *self, struct cmd_ctx *ctx)
1.1       nicm       53: {
1.10    ! nicm       54:        struct args                     *args = self->args;
1.5       nicm       55:        struct cmd_if_shell_data        *cdata;
                     56:        struct job                      *job;
                     57:
                     58:        cdata = xmalloc(sizeof *cdata);
1.10    ! nicm       59:        cdata->cmd = xstrdup(args->argv[1]);
1.5       nicm       60:        memcpy(&cdata->ctx, ctx, sizeof cdata->ctx);
                     61:
                     62:        if (ctx->cmdclient != NULL)
                     63:                ctx->cmdclient->references++;
                     64:        if (ctx->curclient != NULL)
                     65:                ctx->curclient->references++;
                     66:
1.6       nicm       67:        job = job_add(NULL, 0, NULL,
1.10    ! nicm       68:            args->argv[0], cmd_if_shell_callback, cmd_if_shell_free, cdata);
1.5       nicm       69:        job_run(job);
1.1       nicm       70:
1.5       nicm       71:        return (1);     /* don't let client exit */
1.1       nicm       72: }
                     73:
1.5       nicm       74: void
                     75: cmd_if_shell_callback(struct job *job)
1.1       nicm       76: {
1.5       nicm       77:        struct cmd_if_shell_data        *cdata = job->data;
                     78:        struct cmd_ctx                  *ctx = &cdata->ctx;
1.1       nicm       79:        struct cmd_list                 *cmdlist;
                     80:        char                            *cause;
                     81:
1.6       nicm       82:        if (!WIFEXITED(job->status) || WEXITSTATUS(job->status) != 0)
1.5       nicm       83:                return;
1.1       nicm       84:
1.5       nicm       85:        if (cmd_string_parse(cdata->cmd, &cmdlist, &cause) != 0) {
1.1       nicm       86:                if (cause != NULL) {
                     87:                        ctx->error(ctx, "%s", cause);
                     88:                        xfree(cause);
                     89:                }
1.5       nicm       90:                return;
1.1       nicm       91:        }
                     92:
                     93:        if (cmd_list_exec(cmdlist, ctx) < 0) {
                     94:                cmd_list_free(cmdlist);
1.5       nicm       95:                return;
1.1       nicm       96:        }
                     97:
                     98:        cmd_list_free(cmdlist);
                     99: }
                    100:
                    101: void
1.5       nicm      102: cmd_if_shell_free(void *data)
1.1       nicm      103: {
1.5       nicm      104:        struct cmd_if_shell_data        *cdata = data;
                    105:        struct cmd_ctx                  *ctx = &cdata->ctx;
1.8       nicm      106:        struct msg_exit_data             exitdata;
1.1       nicm      107:
1.5       nicm      108:        if (ctx->cmdclient != NULL) {
                    109:                ctx->cmdclient->references--;
1.8       nicm      110:                exitdata.retcode = ctx->cmdclient->retcode;
1.9       nicm      111:                ctx->cmdclient->flags |= CLIENT_EXIT;
1.5       nicm      112:        }
                    113:        if (ctx->curclient != NULL)
                    114:                ctx->curclient->references--;
1.1       nicm      115:
1.5       nicm      116:        xfree(cdata->cmd);
                    117:        xfree(cdata);
1.1       nicm      118: }