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Annotation of embedaddon/tmux/compat/getdtablecount.c, revision 1.1

1.1     ! misho       1: /*
        !             2:  * Copyright (c) 2017 Nicholas Marriott <nicholas.marriott@gmail.com>
        !             3:  *
        !             4:  * Permission to use, copy, modify, and distribute this software for any
        !             5:  * purpose with or without fee is hereby granted, provided that the above
        !             6:  * copyright notice and this permission notice appear in all copies.
        !             7:  *
        !             8:  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
        !             9:  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
        !            10:  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
        !            11:  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
        !            12:  * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
        !            13:  * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
        !            14:  * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
        !            15:  */
        !            16: 
        !            17: #include <sys/types.h>
        !            18: 
        !            19: #include <glob.h>
        !            20: #include <unistd.h>
        !            21: 
        !            22: #include "compat.h"
        !            23: 
        !            24: void fatal(const char *, ...);
        !            25: void fatalx(const char *, ...);
        !            26: 
        !            27: #ifdef HAVE_PROC_PID
        !            28: int
        !            29: getdtablecount(void)
        !            30: {
        !            31:        char    path[PATH_MAX];
        !            32:        glob_t  g;
        !            33:        int     n;
        !            34: 
        !            35:        if (snprintf(path, sizeof path, "/proc/%ld/fd/*", (long)getpid()) < 0)
        !            36:                fatal("snprintf overflow");
        !            37:        switch (glob(path, 0, NULL, &g)) {
        !            38:        case GLOB_NOMATCH:
        !            39:                return (0);
        !            40:        case 0:
        !            41:                break;
        !            42:        default:
        !            43:                fatal("glob(\"%s\") failed", path);
        !            44:        }
        !            45:        n = g.gl_pathc;
        !            46:        globfree(&g);
        !            47:        return (n);
        !            48: }
        !            49: #else
        !            50: int
        !            51: getdtablecount(void)
        !            52: {
        !            53:        return (0);
        !            54: }
        !            55: #endif