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 * 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 * 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 * 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