1 /* $OpenBSD: cmd-if-shell.c,v 1.70 2020/04/13 14:04:25 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 static enum cmd_retval cmd_if_shell_exec(struct cmd *, struct cmdq_item *); 33 34 static void cmd_if_shell_callback(struct job *); 35 static void cmd_if_shell_free(void *); 36 37 const struct cmd_entry cmd_if_shell_entry = { 38 .name = "if-shell", 39 .alias = "if", 40 41 .args = { "bFt:", 2, 3 }, 42 .usage = "[-bF] " CMD_TARGET_PANE_USAGE " shell-command command " 43 "[command]", 44 45 .target = { 't', CMD_FIND_PANE, CMD_FIND_CANFAIL }, 46 47 .flags = 0, 48 .exec = cmd_if_shell_exec 49 }; 50 51 struct cmd_if_shell_data { 52 struct cmd_parse_input input; 53 54 char *cmd_if; 55 char *cmd_else; 56 57 struct client *client; 58 struct cmdq_item *item; 59 struct mouse_event mouse; 60 }; 61 62 static enum cmd_retval 63 cmd_if_shell_exec(struct cmd *self, struct cmdq_item *item) 64 { 65 struct args *args = cmd_get_args(self); 66 struct cmdq_state *state = cmdq_get_state(item); 67 struct cmd_find_state *target = cmdq_get_target(item); 68 struct mouse_event *m = &state->event.m; 69 struct cmd_if_shell_data *cdata; 70 char *shellcmd, *cmd; 71 const char *file; 72 struct cmdq_item *new_item; 73 struct client *c = cmd_find_client(item, NULL, 1); 74 struct session *s = target->s; 75 struct cmd_parse_input pi; 76 struct cmd_parse_result *pr; 77 78 shellcmd = format_single_from_target(item, args->argv[0], c); 79 if (args_has(args, 'F')) { 80 if (*shellcmd != '0' && *shellcmd != '\0') 81 cmd = args->argv[1]; 82 else if (args->argc == 3) 83 cmd = args->argv[2]; 84 else 85 cmd = NULL; 86 free(shellcmd); 87 if (cmd == NULL) 88 return (CMD_RETURN_NORMAL); 89 90 memset(&pi, 0, sizeof pi); 91 cmd_get_source(self, &pi.file, &pi.line); 92 pi.item = item; 93 pi.c = c; 94 cmd_find_copy_state(&pi.fs, target); 95 96 pr = cmd_parse_from_string(cmd, &pi); 97 switch (pr->status) { 98 case CMD_PARSE_EMPTY: 99 break; 100 case CMD_PARSE_ERROR: 101 cmdq_error(item, "%s", pr->error); 102 free(pr->error); 103 return (CMD_RETURN_ERROR); 104 case CMD_PARSE_SUCCESS: 105 new_item = cmdq_get_command(pr->cmdlist, target, m, 0); 106 cmdq_insert_after(item, new_item); 107 cmd_list_free(pr->cmdlist); 108 break; 109 } 110 return (CMD_RETURN_NORMAL); 111 } 112 113 cdata = xcalloc(1, sizeof *cdata); 114 115 cdata->cmd_if = xstrdup(args->argv[1]); 116 if (args->argc == 3) 117 cdata->cmd_else = xstrdup(args->argv[2]); 118 else 119 cdata->cmd_else = NULL; 120 memcpy(&cdata->mouse, m, sizeof cdata->mouse); 121 122 if (!args_has(args, 'b')) 123 cdata->client = cmdq_get_client(item); 124 else 125 cdata->client = c; 126 if (cdata->client != NULL) 127 cdata->client->references++; 128 129 if (!args_has(args, 'b')) 130 cdata->item = item; 131 else 132 cdata->item = NULL; 133 134 memset(&cdata->input, 0, sizeof cdata->input); 135 cmd_get_source(self, &file, &cdata->input.line); 136 if (file != NULL) 137 cdata->input.file = xstrdup(file); 138 cdata->input.c = c; 139 if (cdata->input.c != NULL) 140 cdata->input.c->references++; 141 cmd_find_copy_state(&cdata->input.fs, target); 142 143 if (job_run(shellcmd, s, 144 server_client_get_cwd(cmdq_get_client(item), s), NULL, 145 cmd_if_shell_callback, cmd_if_shell_free, cdata, 0, -1, 146 -1) == NULL) { 147 cmdq_error(item, "failed to run command: %s", shellcmd); 148 free(shellcmd); 149 free(cdata); 150 return (CMD_RETURN_ERROR); 151 } 152 free(shellcmd); 153 154 if (args_has(args, 'b')) 155 return (CMD_RETURN_NORMAL); 156 return (CMD_RETURN_WAIT); 157 } 158 159 static void 160 cmd_if_shell_callback(struct job *job) 161 { 162 struct cmd_if_shell_data *cdata = job_get_data(job); 163 struct client *c = cdata->client; 164 struct mouse_event *m = &cdata->mouse; 165 struct cmdq_item *new_item = NULL; 166 char *cmd; 167 int status; 168 struct cmd_parse_result *pr; 169 170 status = job_get_status(job); 171 if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) 172 cmd = cdata->cmd_else; 173 else 174 cmd = cdata->cmd_if; 175 if (cmd == NULL) 176 goto out; 177 178 pr = cmd_parse_from_string(cmd, &cdata->input); 179 switch (pr->status) { 180 case CMD_PARSE_EMPTY: 181 break; 182 case CMD_PARSE_ERROR: 183 if (cdata->item != NULL) 184 cmdq_error(cdata->item, "%s", pr->error); 185 free(pr->error); 186 break; 187 case CMD_PARSE_SUCCESS: 188 new_item = cmdq_get_command(pr->cmdlist, NULL, m, 0); 189 cmd_list_free(pr->cmdlist); 190 break; 191 } 192 if (new_item != NULL) { 193 if (cdata->item == NULL) 194 cmdq_append(c, new_item); 195 else 196 cmdq_insert_after(cdata->item, new_item); 197 } 198 199 out: 200 if (cdata->item != NULL) 201 cmdq_continue(cdata->item); 202 } 203 204 static void 205 cmd_if_shell_free(void *data) 206 { 207 struct cmd_if_shell_data *cdata = data; 208 209 if (cdata->client != NULL) 210 server_client_unref(cdata->client); 211 212 free(cdata->cmd_else); 213 free(cdata->cmd_if); 214 215 if (cdata->input.c != NULL) 216 server_client_unref(cdata->input.c); 217 free((void *)cdata->input.file); 218 219 free(cdata); 220 } 221