1 /* Id */ 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 cmd_if_shell_exec 45 }; 46 47 struct cmd_if_shell_data { 48 char *cmd_if; 49 char *cmd_else; 50 struct cmd_q *cmdq; 51 int bflag; 52 int started; 53 }; 54 55 enum cmd_retval 56 cmd_if_shell_exec(struct cmd *self, struct cmd_q *cmdq) 57 { 58 struct args *args = self->args; 59 struct cmd_if_shell_data *cdata; 60 char *shellcmd; 61 struct client *c; 62 struct session *s = NULL; 63 struct winlink *wl = NULL; 64 struct window_pane *wp = NULL; 65 struct format_tree *ft; 66 67 if (args_has(args, 't')) 68 wl = cmd_find_pane(cmdq, args_get(args, 't'), &s, &wp); 69 else { 70 c = cmd_find_client(cmdq, NULL, 1); 71 if (c != NULL && c->session != NULL) { 72 s = c->session; 73 wl = s->curw; 74 wp = wl->window->active; 75 } 76 } 77 78 ft = format_create(); 79 if (s != NULL) 80 format_session(ft, s); 81 if (s != NULL && wl != NULL) 82 format_winlink(ft, s, wl); 83 if (wp != NULL) 84 format_window_pane(ft, wp); 85 shellcmd = format_expand(ft, args->argv[0]); 86 format_free(ft); 87 88 cdata = xmalloc(sizeof *cdata); 89 cdata->cmd_if = xstrdup(args->argv[1]); 90 if (args->argc == 3) 91 cdata->cmd_else = xstrdup(args->argv[2]); 92 else 93 cdata->cmd_else = NULL; 94 cdata->bflag = args_has(args, 'b'); 95 96 cdata->started = 0; 97 cdata->cmdq = cmdq; 98 cmdq->references++; 99 100 job_run(shellcmd, s, cmd_if_shell_callback, cmd_if_shell_free, cdata); 101 free(shellcmd); 102 103 if (cdata->bflag) 104 return (CMD_RETURN_NORMAL); 105 return (CMD_RETURN_WAIT); 106 } 107 108 void 109 cmd_if_shell_callback(struct job *job) 110 { 111 struct cmd_if_shell_data *cdata = job->data; 112 struct cmd_q *cmdq = cdata->cmdq, *cmdq1; 113 struct cmd_list *cmdlist; 114 char *cause, *cmd; 115 116 if (cmdq->dead) 117 return; 118 119 if (!WIFEXITED(job->status) || WEXITSTATUS(job->status) != 0) 120 cmd = cdata->cmd_else; 121 else 122 cmd = cdata->cmd_if; 123 if (cmd == NULL) 124 return; 125 126 if (cmd_string_parse(cmd, &cmdlist, NULL, 0, &cause) != 0) { 127 if (cause != NULL) { 128 cmdq_error(cmdq, "%s", cause); 129 free(cause); 130 } 131 return; 132 } 133 134 cdata->started = 1; 135 136 cmdq1 = cmdq_new(cmdq->client); 137 cmdq1->emptyfn = cmd_if_shell_done; 138 cmdq1->data = cdata; 139 140 cmdq_run(cmdq1, cmdlist); 141 cmd_list_free(cmdlist); 142 } 143 144 void 145 cmd_if_shell_done(struct cmd_q *cmdq1) 146 { 147 struct cmd_if_shell_data *cdata = cmdq1->data; 148 struct cmd_q *cmdq = cdata->cmdq; 149 150 if (cmdq1->client_exit >= 0) 151 cmdq->client_exit = cmdq1->client_exit; 152 153 if (!cmdq_free(cmdq) && !cdata->bflag) 154 cmdq_continue(cmdq); 155 156 cmdq_free(cmdq1); 157 158 free(cdata->cmd_else); 159 free(cdata->cmd_if); 160 free(cdata); 161 } 162 163 void 164 cmd_if_shell_free(void *data) 165 { 166 struct cmd_if_shell_data *cdata = data; 167 struct cmd_q *cmdq = cdata->cmdq; 168 169 if (cdata->started) 170 return; 171 172 if (!cmdq_free(cmdq) && !cdata->bflag) 173 cmdq_continue(cmdq); 174 175 free(cdata->cmd_else); 176 free(cdata->cmd_if); 177 free(cdata); 178 } 179