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Initial revision

    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 <event.h>
   24: #include <stdio.h>
   25: #include <stdlib.h>
   26: #include <unistd.h>
   27: 
   28: #include "tmux.h"
   29: 
   30: char *
   31: osdep_get_name(int fd, __unused char *tty)
   32: {
   33: 	FILE	*f;
   34: 	char	*path, *buf;
   35: 	size_t	 len;
   36: 	int	 ch;
   37: 	pid_t	 pgrp;
   38: 
   39: 	if ((pgrp = tcgetpgrp(fd)) == -1)
   40: 		return (NULL);
   41: 
   42: 	xasprintf(&path, "/proc/%lld/cmdline", (long long) pgrp);
   43: 	if ((f = fopen(path, "r")) == NULL) {
   44: 		free(path);
   45: 		return (NULL);
   46: 	}
   47: 	free(path);
   48: 
   49: 	len = 0;
   50: 	buf = NULL;
   51: 	while ((ch = fgetc(f)) != EOF) {
   52: 		if (ch == '\0')
   53: 			break;
   54: 		buf = xrealloc(buf, len + 2);
   55: 		buf[len++] = ch;
   56: 	}
   57: 	if (buf != NULL)
   58: 		buf[len] = '\0';
   59: 
   60: 	fclose(f);
   61: 	return (buf);
   62: }
   63: 
   64: char *
   65: osdep_get_cwd(int fd)
   66: {
   67: 	static char	 target[MAXPATHLEN + 1];
   68: 	char		*path;
   69: 	pid_t		 pgrp, sid;
   70: 	ssize_t		 n;
   71: 
   72: 	if ((pgrp = tcgetpgrp(fd)) == -1)
   73: 		return (NULL);
   74: 
   75: 	xasprintf(&path, "/proc/%lld/cwd", (long long) pgrp);
   76: 	n = readlink(path, target, MAXPATHLEN);
   77: 	free(path);
   78: 
   79: 	if (n == -1 && ioctl(fd, TIOCGSID, &sid) != -1) {
   80: 		xasprintf(&path, "/proc/%lld/cwd", (long long) sid);
   81: 		n = readlink(path, target, MAXPATHLEN);
   82: 		free(path);
   83: 	}
   84: 
   85: 	if (n > 0) {
   86: 		target[n] = '\0';
   87: 		return (target);
   88: 	}
   89: 	return (NULL);
   90: }
   91: 
   92: struct event_base *
   93: osdep_event_init(void)
   94: {
   95: 	/* On Linux, epoll doesn't work on /dev/null (yes, really). */
   96: 	setenv("EVENT_NOEPOLL", "1", 1);
   97: 	return (event_init());
   98: }