1 /* $OpenBSD: cmd-if-shell.c,v 1.7 2009/11/13 19:53:29 nicm Exp $ */ 2 3 /* 4 * Copyright (c) 2009 Tiago Cunha <me@tiagocunha.org> 5 * Copyright (c) 2009 Nicholas Marriott <nicm@openbsd.org> 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> 21 #include <sys/wait.h> 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 33 void cmd_if_shell_callback(struct job *); 34 void cmd_if_shell_free(void *); 35 36 const struct cmd_entry cmd_if_shell_entry = { 37 "if-shell", "if", 38 "shell-command command", 39 CMD_ARG2, "", 40 cmd_target_init, 41 cmd_target_parse, 42 cmd_if_shell_exec, 43 cmd_target_free, 44 cmd_target_print 45 }; 46 47 struct cmd_if_shell_data { 48 char *cmd; 49 struct cmd_ctx ctx; 50 }; 51 52 int 53 cmd_if_shell_exec(struct cmd *self, struct cmd_ctx *ctx) 54 { 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, 0, NULL, 69 data->arg, cmd_if_shell_callback, cmd_if_shell_free, cdata); 70 job_run(job); 71 72 return (1); /* don't let client exit */ 73 } 74 75 void 76 cmd_if_shell_callback(struct job *job) 77 { 78 struct cmd_if_shell_data *cdata = job->data; 79 struct cmd_ctx *ctx = &cdata->ctx; 80 struct cmd_list *cmdlist; 81 char *cause; 82 83 if (!WIFEXITED(job->status) || WEXITSTATUS(job->status) != 0) 84 return; 85 86 if (cmd_string_parse(cdata->cmd, &cmdlist, &cause) != 0) { 87 if (cause != NULL) { 88 ctx->error(ctx, "%s", cause); 89 xfree(cause); 90 } 91 return; 92 } 93 94 if (cmd_list_exec(cmdlist, ctx) < 0) { 95 cmd_list_free(cmdlist); 96 return; 97 } 98 99 cmd_list_free(cmdlist); 100 } 101 102 void 103 cmd_if_shell_free(void *data) 104 { 105 struct cmd_if_shell_data *cdata = data; 106 struct cmd_ctx *ctx = &cdata->ctx; 107 108 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--; 114 115 xfree(cdata->cmd); 116 xfree(cdata); 117 } 118