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3d7b8105e1
Simplify the way jobs work and drop the persist type, so all jobs are fire-and-forget. Status jobs now managed with two trees of output (new and old), rather than storing the output in the jobs themselves. When the status line is processed any jobs which don't appear in the new tree are started and the output from the old tree displayed. When a job finishes it updates the new tree with its output and that is used for any subsequent redraws. When the status interval expires, the new tree is moved to the old so that all jobs are run again. This fixes the "#(echo %H:%M:%S)" problem which would lead to thousands of identical persistent jobs and high memory use (this can still be achieved by adding "sleep 30" but that is much less likely to happen by accident).
117 lines
2.8 KiB
C
117 lines
2.8 KiB
C
/* $Id: cmd-if-shell.c,v 1.12 2011-02-15 15:20:03 tcunha Exp $ */
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/*
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* Copyright (c) 2009 Tiago Cunha <me@tiagocunha.org>
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* Copyright (c) 2009 Nicholas Marriott <nicm@openbsd.org>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
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* IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
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* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <sys/types.h>
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#include <sys/wait.h>
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#include <string.h>
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#include "tmux.h"
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/*
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* Executes a tmux command if a shell command returns true.
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*/
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int cmd_if_shell_exec(struct cmd *, struct cmd_ctx *);
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void cmd_if_shell_callback(struct job *);
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void cmd_if_shell_free(void *);
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const struct cmd_entry cmd_if_shell_entry = {
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"if-shell", "if",
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"", 2, 2,
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"shell-command command",
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0,
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NULL,
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NULL,
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cmd_if_shell_exec
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};
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struct cmd_if_shell_data {
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char *cmd;
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struct cmd_ctx ctx;
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};
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int
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cmd_if_shell_exec(struct cmd *self, struct cmd_ctx *ctx)
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{
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struct args *args = self->args;
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struct cmd_if_shell_data *cdata;
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const char *shellcmd = args->argv[0];
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cdata = xmalloc(sizeof *cdata);
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cdata->cmd = xstrdup(args->argv[1]);
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memcpy(&cdata->ctx, ctx, sizeof cdata->ctx);
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if (ctx->cmdclient != NULL)
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ctx->cmdclient->references++;
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if (ctx->curclient != NULL)
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ctx->curclient->references++;
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job_run(shellcmd, cmd_if_shell_callback, cmd_if_shell_free, cdata);
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return (1); /* don't let client exit */
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}
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void
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cmd_if_shell_callback(struct job *job)
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{
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struct cmd_if_shell_data *cdata = job->data;
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struct cmd_ctx *ctx = &cdata->ctx;
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struct cmd_list *cmdlist;
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char *cause;
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if (!WIFEXITED(job->status) || WEXITSTATUS(job->status) != 0)
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return;
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if (cmd_string_parse(cdata->cmd, &cmdlist, &cause) != 0) {
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if (cause != NULL) {
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ctx->error(ctx, "%s", cause);
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xfree(cause);
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}
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return;
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}
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if (cmd_list_exec(cmdlist, ctx) < 0) {
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cmd_list_free(cmdlist);
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return;
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}
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cmd_list_free(cmdlist);
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}
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void
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cmd_if_shell_free(void *data)
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{
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struct cmd_if_shell_data *cdata = data;
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struct cmd_ctx *ctx = &cdata->ctx;
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struct msg_exit_data exitdata;
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if (ctx->cmdclient != NULL) {
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ctx->cmdclient->references--;
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exitdata.retcode = ctx->cmdclient->retcode;
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ctx->cmdclient->flags |= CLIENT_EXIT;
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}
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if (ctx->curclient != NULL)
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ctx->curclient->references--;
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xfree(cdata->cmd);
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xfree(cdata);
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}
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