misc-utils/lsfd-fifo.c

   1 /*
   2  * lsfd-fifo.c - handle associations opening fifo objects
   3  *
   4  * Copyright (C) 2021 Red Hat, Inc. All rights reserved.
   5  * Written by Masatake YAMATO <yamato@redhat.com>
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it would be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software Foundation,
  19  * Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  20  */
  21
  22 #include "xalloc.h"
  23 #include "nls.h"
  24 #include "libsmartcols.h"
  25
  26 #include "lsfd.h"
  27
  28 static bool fifo_fill_column(struct proc *proc __attribute__((__unused__)),
  29                              struct file *file,
  30                              struct libscols_line *ln,
  31                              int column_id,
  32                              size_t column_index)
  33 {
  34         char *str = NULL;
  35
  36         switch(column_id) {
  37         case COL_TYPE:
  38                 if (scols_line_set_data(ln, column_index, "FIFO"))
  39                         err(EXIT_FAILURE, _("failed to add output data"));
  40                 return true;
  41         case COL_SOURCE:
  42                 if (major(file->stat.st_dev) == 0
  43                     && strncmp(file->name, "pipe:", 5) == 0) {
  44                         str = strdup("pipefs");
  45                         break;
  46                 }
  47                 return false;
  48         default:
  49                 return false;
  50         }
  51
  52         if (!str)
  53                 err(EXIT_FAILURE, _("failed to add output data"));
  54         if (scols_line_refer_data(ln, column_index, str))
  55                 err(EXIT_FAILURE, _("failed to add output data"));
  56         return true;
  57 }
  58
  59 const struct file_class fifo_class = {
  60         .super = &file_class,
  61         .size = sizeof(struct file),
  62         .fill_column = fifo_fill_column,
  63         .free_content = NULL,
  64 };