1 /* $OpenBSD$ */
2
3 /*
4 * Copyright (c) 2009 Nicholas Marriott <nicholas.marriott@gmail.com>
5 *
6 * Permission to use, copy, modify, and distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
9 *
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
15 * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
16 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 */
18
19 #include <sys/types.h>
20 #include <sys/stat.h>
21 #include <sys/param.h>
22
23 #include <stdio.h>
24 #include <stdlib.h>
25 #include <unistd.h>
26
27 #include "tmux.h"
28
29 char *
osdep_get_name(int fd,__unused char * tty)30 osdep_get_name(int fd, __unused char *tty)
31 {
32 FILE *f;
33 char *path, *buf;
34 size_t len;
35 int ch;
36 pid_t pgrp;
37
38 if ((pgrp = tcgetpgrp(fd)) == -1)
39 return (NULL);
40
41 xasprintf(&path, "/proc/%lld/cmdline", (long long) pgrp);
42 if ((f = fopen(path, "r")) == NULL) {
43 free(path);
44 return (NULL);
45 }
46 free(path);
47
48 len = 0;
49 buf = NULL;
50 while ((ch = fgetc(f)) != EOF) {
51 if (ch == '\0')
52 break;
53 buf = xrealloc(buf, len + 2);
54 buf[len++] = ch;
55 }
56 if (buf != NULL)
57 buf[len] = '\0';
58
59 fclose(f);
60 return (buf);
61 }
62
63 char *
osdep_get_cwd(int fd)64 osdep_get_cwd(int fd)
65 {
66 static char target[MAXPATHLEN + 1];
67 char *path;
68 pid_t pgrp, sid;
69 ssize_t n;
70
71 if ((pgrp = tcgetpgrp(fd)) == -1)
72 return (NULL);
73
74 xasprintf(&path, "/proc/%lld/cwd", (long long) pgrp);
75 n = readlink(path, target, MAXPATHLEN);
76 free(path);
77
78 if (n == -1 && ioctl(fd, TIOCGSID, &sid) != -1) {
79 xasprintf(&path, "/proc/%lld/cwd", (long long) sid);
80 n = readlink(path, target, MAXPATHLEN);
81 free(path);
82 }
83
84 if (n > 0) {
85 target[n] = '\0';
86 return (target);
87 }
88 return (NULL);
89 }
90
91 struct event_base *
osdep_event_init(void)92 osdep_event_init(void)
93 {
94 struct event_base *base;
95
96 /* On Linux, epoll doesn't work on /dev/null (yes, really). */
97 setenv("EVENT_NOEPOLL", "1", 1);
98
99 base = event_init();
100 unsetenv("EVENT_NOEPOLL");
101 return (base);
102 }
103