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Annotation of embedaddon/tmux/osdep-linux.c, revision 1.1.1.1

1.1       misho       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: }