1 /* $OpenBSD: cmd-if-shell.c,v 1.17 2012/08/11 07:32:16 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 <stdlib.h> 24 #include <string.h> 25 26 #include "tmux.h" 27 28 /* 29 * Executes a tmux command if a shell command returns true or false. 30 */ 31 32 enum cmd_retval cmd_if_shell_exec(struct cmd *, struct cmd_ctx *); 33 34 void cmd_if_shell_callback(struct job *); 35 void cmd_if_shell_free(void *); 36 37 const struct cmd_entry cmd_if_shell_entry = { 38 "if-shell", "if", 39 "", 2, 3, 40 "shell-command command [command]", 41 0, 42 NULL, 43 NULL, 44 cmd_if_shell_exec 45 }; 46 47 struct cmd_if_shell_data { 48 char *cmd_if; 49 char *cmd_else; 50 struct cmd_ctx ctx; 51 }; 52 53 enum cmd_retval 54 cmd_if_shell_exec(struct cmd *self, struct cmd_ctx *ctx) 55 { 56 struct args *args = self->args; 57 struct cmd_if_shell_data *cdata; 58 const char *shellcmd = args->argv[0]; 59 60 cdata = xmalloc(sizeof *cdata); 61 cdata->cmd_if = xstrdup(args->argv[1]); 62 if (args->argc == 3) 63 cdata->cmd_else = xstrdup(args->argv[2]); 64 else 65 cdata->cmd_else = NULL; 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 73 job_run(shellcmd, cmd_if_shell_callback, cmd_if_shell_free, cdata); 74 75 return (CMD_RETURN_YIELD); /* don't let client exit */ 76 } 77 78 void 79 cmd_if_shell_callback(struct job *job) 80 { 81 struct cmd_if_shell_data *cdata = job->data; 82 struct cmd_ctx *ctx = &cdata->ctx; 83 struct cmd_list *cmdlist; 84 char *cause, *cmd; 85 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) { 93 if (cause != NULL) { 94 ctx->error(ctx, "%s", cause); 95 free(cause); 96 } 97 return; 98 } 99 100 cmd_list_exec(cmdlist, ctx); 101 cmd_list_free(cmdlist); 102 } 103 104 void 105 cmd_if_shell_free(void *data) 106 { 107 struct cmd_if_shell_data *cdata = data; 108 struct cmd_ctx *ctx = &cdata->ctx; 109 110 if (ctx->cmdclient != NULL) { 111 ctx->cmdclient->references--; 112 ctx->cmdclient->flags |= CLIENT_EXIT; 113 } 114 if (ctx->curclient != NULL) 115 ctx->curclient->references--; 116 117 free(cdata->cmd_else); 118 free(cdata->cmd_if); 119 free(cdata); 120 } 121