1 /* $OpenBSD: cmd-if-shell.c,v 1.32 2015/04/24 22:19:36 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 "bFt:", 2, 3, 41 "[-bF] " CMD_TARGET_PANE_USAGE " shell-command command [command]", 42 0, 43 cmd_if_shell_exec 44 }; 45 46 struct cmd_if_shell_data { 47 char *cmd_if; 48 char *cmd_else; 49 50 struct cmd_q *cmdq; 51 struct mouse_event mouse; 52 53 int bflag; 54 int references; 55 }; 56 57 enum cmd_retval 58 cmd_if_shell_exec(struct cmd *self, struct cmd_q *cmdq) 59 { 60 struct args *args = self->args; 61 struct cmd_if_shell_data *cdata; 62 char *shellcmd, *cmd, *cause; 63 struct cmd_list *cmdlist; 64 struct client *c; 65 struct session *s = NULL; 66 struct winlink *wl = NULL; 67 struct window_pane *wp = NULL; 68 struct format_tree *ft; 69 int cwd; 70 71 if (args_has(args, 't')) { 72 wl = cmd_find_pane(cmdq, args_get(args, 't'), &s, &wp); 73 cwd = wp->cwd; 74 } else { 75 c = cmd_find_client(cmdq, NULL, 1); 76 if (c != NULL && c->session != NULL) { 77 s = c->session; 78 wl = s->curw; 79 wp = wl->window->active; 80 } 81 if (cmdq->client != NULL && cmdq->client->session == NULL) 82 cwd = cmdq->client->cwd; 83 else if (s != NULL) 84 cwd = s->cwd; 85 else 86 cwd = -1; 87 } 88 89 ft = format_create(); 90 format_defaults(ft, NULL, s, wl, wp); 91 shellcmd = format_expand(ft, args->argv[0]); 92 format_free(ft); 93 94 if (args_has(args, 'F')) { 95 cmd = NULL; 96 if (*shellcmd != '0' && *shellcmd != '\0') 97 cmd = args->argv[1]; 98 else if (args->argc == 3) 99 cmd = args->argv[2]; 100 if (cmd == NULL) 101 return (CMD_RETURN_NORMAL); 102 if (cmd_string_parse(cmd, &cmdlist, NULL, 0, &cause) != 0) { 103 if (cause != NULL) { 104 cmdq_error(cmdq, "%s", cause); 105 free(cause); 106 } 107 return (CMD_RETURN_ERROR); 108 } 109 cmdq_run(cmdq, cmdlist, &cmdq->item->mouse); 110 cmd_list_free(cmdlist); 111 return (CMD_RETURN_NORMAL); 112 } 113 114 cdata = xmalloc(sizeof *cdata); 115 116 cdata->cmd_if = xstrdup(args->argv[1]); 117 if (args->argc == 3) 118 cdata->cmd_else = xstrdup(args->argv[2]); 119 else 120 cdata->cmd_else = NULL; 121 122 cdata->bflag = args_has(args, 'b'); 123 124 cdata->cmdq = cmdq; 125 memcpy(&cdata->mouse, &cmdq->item->mouse, sizeof cdata->mouse); 126 cmdq->references++; 127 128 cdata->references = 1; 129 job_run(shellcmd, s, cwd, cmd_if_shell_callback, cmd_if_shell_free, 130 cdata); 131 free(shellcmd); 132 133 if (cdata->bflag) 134 return (CMD_RETURN_NORMAL); 135 return (CMD_RETURN_WAIT); 136 } 137 138 void 139 cmd_if_shell_callback(struct job *job) 140 { 141 struct cmd_if_shell_data *cdata = job->data; 142 struct cmd_q *cmdq = cdata->cmdq, *cmdq1; 143 struct cmd_list *cmdlist; 144 char *cause, *cmd; 145 146 if (cmdq->dead) 147 return; 148 149 if (!WIFEXITED(job->status) || WEXITSTATUS(job->status) != 0) 150 cmd = cdata->cmd_else; 151 else 152 cmd = cdata->cmd_if; 153 if (cmd == NULL) 154 return; 155 156 if (cmd_string_parse(cmd, &cmdlist, NULL, 0, &cause) != 0) { 157 if (cause != NULL) { 158 cmdq_error(cmdq, "%s", cause); 159 free(cause); 160 } 161 return; 162 } 163 164 cmdq1 = cmdq_new(cmdq->client); 165 cmdq1->emptyfn = cmd_if_shell_done; 166 cmdq1->data = cdata; 167 168 cdata->references++; 169 cmdq_run(cmdq1, cmdlist, &cdata->mouse); 170 cmd_list_free(cmdlist); 171 } 172 173 void 174 cmd_if_shell_done(struct cmd_q *cmdq1) 175 { 176 struct cmd_if_shell_data *cdata = cmdq1->data; 177 struct cmd_q *cmdq = cdata->cmdq; 178 179 if (cmdq1->client_exit >= 0) 180 cmdq->client_exit = cmdq1->client_exit; 181 cmdq_free(cmdq1); 182 183 if (--cdata->references != 0) 184 return; 185 186 if (!cmdq_free(cmdq) && !cdata->bflag) 187 cmdq_continue(cmdq); 188 189 free(cdata->cmd_else); 190 free(cdata->cmd_if); 191 free(cdata); 192 } 193 194 void 195 cmd_if_shell_free(void *data) 196 { 197 struct cmd_if_shell_data *cdata = data; 198 struct cmd_q *cmdq = cdata->cmdq; 199 200 if (--cdata->references != 0) 201 return; 202 203 if (!cmdq_free(cmdq) && !cdata->bflag) 204 cmdq_continue(cmdq); 205 206 free(cdata->cmd_else); 207 free(cdata->cmd_if); 208 free(cdata); 209 } 210