1 /* $OpenBSD: cmd-if-shell.c,v 1.23 2013/03/25 16:04:07 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_q *); 33 34 void cmd_if_shell_callback(struct job *); 35 void cmd_if_shell_done(struct cmd_q *); 36 void cmd_if_shell_free(void *); 37 38 const struct cmd_entry cmd_if_shell_entry = { 39 "if-shell", "if", 40 "bt:", 2, 3, 41 "[-b] " CMD_TARGET_PANE_USAGE " shell-command command [command]", 42 0, 43 NULL, 44 NULL, 45 cmd_if_shell_exec 46 }; 47 48 struct cmd_if_shell_data { 49 char *cmd_if; 50 char *cmd_else; 51 struct cmd_q *cmdq; 52 int bflag; 53 int started; 54 }; 55 56 enum cmd_retval 57 cmd_if_shell_exec(struct cmd *self, struct cmd_q *cmdq) 58 { 59 struct args *args = self->args; 60 struct cmd_if_shell_data *cdata; 61 char *shellcmd; 62 struct client *c; 63 struct session *s = NULL; 64 struct winlink *wl = NULL; 65 struct window_pane *wp = NULL; 66 struct format_tree *ft; 67 68 if (args_has(args, 't')) 69 wl = cmd_find_pane(cmdq, args_get(args, 't'), &s, &wp); 70 else { 71 c = cmd_find_client(cmdq, NULL, 1); 72 if (c != NULL && c->session != NULL) { 73 s = c->session; 74 wl = s->curw; 75 wp = wl->window->active; 76 } 77 } 78 79 ft = format_create(); 80 if (s != NULL) 81 format_session(ft, s); 82 if (s != NULL && wl != NULL) 83 format_winlink(ft, s, wl); 84 if (wp != NULL) 85 format_window_pane(ft, wp); 86 shellcmd = format_expand(ft, args->argv[0]); 87 format_free(ft); 88 89 cdata = xmalloc(sizeof *cdata); 90 cdata->cmd_if = xstrdup(args->argv[1]); 91 if (args->argc == 3) 92 cdata->cmd_else = xstrdup(args->argv[2]); 93 else 94 cdata->cmd_else = NULL; 95 cdata->bflag = args_has(args, 'b'); 96 97 cdata->started = 0; 98 cdata->cmdq = cmdq; 99 cmdq->references++; 100 101 job_run(shellcmd, s, cmd_if_shell_callback, cmd_if_shell_free, cdata); 102 free(shellcmd); 103 104 if (cdata->bflag) 105 return (CMD_RETURN_NORMAL); 106 return (CMD_RETURN_WAIT); 107 } 108 109 void 110 cmd_if_shell_callback(struct job *job) 111 { 112 struct cmd_if_shell_data *cdata = job->data; 113 struct cmd_q *cmdq = cdata->cmdq, *cmdq1; 114 struct cmd_list *cmdlist; 115 char *cause, *cmd; 116 117 if (cmdq->dead) 118 return; 119 120 if (!WIFEXITED(job->status) || WEXITSTATUS(job->status) != 0) 121 cmd = cdata->cmd_else; 122 else 123 cmd = cdata->cmd_if; 124 if (cmd == NULL) 125 return; 126 127 if (cmd_string_parse(cmd, &cmdlist, NULL, 0, &cause) != 0) { 128 if (cause != NULL) { 129 cmdq_error(cmdq, "%s", cause); 130 free(cause); 131 } 132 return; 133 } 134 135 cdata->started = 1; 136 137 cmdq1 = cmdq_new(cmdq->client); 138 cmdq1->emptyfn = cmd_if_shell_done; 139 cmdq1->data = cdata; 140 141 cmdq_run(cmdq1, cmdlist); 142 cmd_list_free(cmdlist); 143 } 144 145 void 146 cmd_if_shell_done(struct cmd_q *cmdq1) 147 { 148 struct cmd_if_shell_data *cdata = cmdq1->data; 149 struct cmd_q *cmdq = cdata->cmdq; 150 151 if (!cmdq_free(cmdq) && !cdata->bflag) 152 cmdq_continue(cmdq); 153 154 cmdq_free(cmdq1); 155 156 free(cdata->cmd_else); 157 free(cdata->cmd_if); 158 free(cdata); 159 } 160 161 void 162 cmd_if_shell_free(void *data) 163 { 164 struct cmd_if_shell_data *cdata = data; 165 struct cmd_q *cmdq = cdata->cmdq; 166 167 if (cdata->started) 168 return; 169 170 if (!cmdq_free(cmdq) && !cdata->bflag) 171 cmdq_continue(cmdq); 172 173 free(cdata->cmd_else); 174 free(cdata->cmd_if); 175 free(cdata); 176 } 177