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