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Annotation of src/usr.bin/tmux/cmd-if-shell.c, Revision 1.17

1.17    ! nicm        1: /* $OpenBSD: cmd-if-shell.c,v 1.16 2012/07/11 07:10:15 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:
1.15      nicm       23: #include <stdlib.h>
1.1       nicm       24: #include <string.h>
                     25:
                     26: #include "tmux.h"
                     27:
                     28: /*
1.14      nicm       29:  * Executes a tmux command if a shell command returns true or false.
1.1       nicm       30:  */
                     31:
1.16      nicm       32: enum cmd_retval         cmd_if_shell_exec(struct cmd *, struct cmd_ctx *);
1.1       nicm       33:
1.5       nicm       34: void   cmd_if_shell_callback(struct job *);
                     35: void   cmd_if_shell_free(void *);
1.1       nicm       36:
                     37: const struct cmd_entry cmd_if_shell_entry = {
                     38:        "if-shell", "if",
1.14      nicm       39:        "", 2, 3,
                     40:        "shell-command command [command]",
1.10      nicm       41:        0,
                     42:        NULL,
1.14      nicm       43:        NULL,
1.10      nicm       44:        cmd_if_shell_exec
1.1       nicm       45: };
                     46:
1.5       nicm       47: struct cmd_if_shell_data {
1.13      nicm       48:        char            *cmd_if;
                     49:        char            *cmd_else;
1.5       nicm       50:        struct cmd_ctx   ctx;
                     51: };
1.1       nicm       52:
1.16      nicm       53: enum cmd_retval
1.5       nicm       54: cmd_if_shell_exec(struct cmd *self, struct cmd_ctx *ctx)
1.1       nicm       55: {
1.10      nicm       56:        struct args                     *args = self->args;
1.5       nicm       57:        struct cmd_if_shell_data        *cdata;
1.11      nicm       58:        const char                      *shellcmd = args->argv[0];
1.5       nicm       59:
                     60:        cdata = xmalloc(sizeof *cdata);
1.13      nicm       61:        cdata->cmd_if = xstrdup(args->argv[1]);
1.14      nicm       62:        if (args->argc == 3)
                     63:                cdata->cmd_else = xstrdup(args->argv[2]);
1.13      nicm       64:        else
                     65:                cdata->cmd_else = NULL;
1.5       nicm       66:        memcpy(&cdata->ctx, ctx, sizeof cdata->ctx);
                     67:
                     68:        if (ctx->cmdclient != NULL)
                     69:                ctx->cmdclient->references++;
                     70:        if (ctx->curclient != NULL)
                     71:                ctx->curclient->references++;
                     72:
1.11      nicm       73:        job_run(shellcmd, cmd_if_shell_callback, cmd_if_shell_free, cdata);
1.1       nicm       74:
1.16      nicm       75:        return (CMD_RETURN_YIELD);      /* don't let client exit */
1.1       nicm       76: }
                     77:
1.5       nicm       78: void
                     79: cmd_if_shell_callback(struct job *job)
1.1       nicm       80: {
1.5       nicm       81:        struct cmd_if_shell_data        *cdata = job->data;
                     82:        struct cmd_ctx                  *ctx = &cdata->ctx;
1.1       nicm       83:        struct cmd_list                 *cmdlist;
1.14      nicm       84:        char                            *cause, *cmd;
1.1       nicm       85:
1.13      nicm       86:        if (!WIFEXITED(job->status) || WEXITSTATUS(job->status) != 0) {
                     87:                cmd = cdata->cmd_else;
                     88:                if (cmd == NULL)
                     89:                        return;
                     90:        } else
                     91:                cmd = cdata->cmd_if;
                     92:        if (cmd_string_parse(cmd, &cmdlist, &cause) != 0) {
1.1       nicm       93:                if (cause != NULL) {
                     94:                        ctx->error(ctx, "%s", cause);
1.15      nicm       95:                        free(cause);
1.1       nicm       96:                }
1.5       nicm       97:                return;
1.1       nicm       98:        }
                     99:
1.12      nicm      100:        cmd_list_exec(cmdlist, ctx);
1.1       nicm      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--;
1.9       nicm      112:                ctx->cmdclient->flags |= CLIENT_EXIT;
1.5       nicm      113:        }
                    114:        if (ctx->curclient != NULL)
                    115:                ctx->curclient->references--;
1.1       nicm      116:
1.15      nicm      117:        free(cdata->cmd_else);
                    118:        free(cdata->cmd_if);
                    119:        free(cdata);
1.1       nicm      120: }