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Annotation of embedaddon/tmux/compat/getdtablecount.c, revision 1.1.1.1

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