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
cmd_if_shell_exec(struct cmd * self,struct cmd_q * cmdq)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
cmd_if_shell_callback(struct job * job)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
cmd_if_shell_done(struct cmd_q * cmdq1)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
cmd_if_shell_free(void * data)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