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/*
* lsfd-sock.c - handle associations opening socket objects
*
* Copyright (C) 2021 Red Hat, Inc. All rights reserved.
* Written by Masatake YAMATO <yamato@redhat.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it would be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <sys/types.h>
#include <sys/xattr.h>
#include "xalloc.h"
#include "nls.h"
#include "libsmartcols.h"
#include "lsfd.h"
struct sock {
struct file file;
char *protoname;
};
static bool sock_fill_column(struct proc *proc __attribute__((__unused__)),
struct file *file,
struct libscols_line *ln,
int column_id,
size_t column_index)
{
char *str = NULL;
struct sock *sock = (struct sock *)file;
switch(column_id) {
case COL_TYPE:
if (scols_line_set_data(ln, column_index, "SOCK"))
err(EXIT_FAILURE, _("failed to add output data"));
return true;
case COL_PROTONAME:
if (sock->protoname)
if (scols_line_set_data(ln, column_index, sock->protoname))
err(EXIT_FAILURE, _("failed to add output data"));
return true;
case COL_NAME:
if (sock->protoname
&& file->name && strncmp(file->name, "socket:", 7) == 0) {
xasprintf(&str, "%s:%s", sock->protoname, file->name + 7);
break;
}
return false;
case COL_SOURCE:
if (major(file->stat.st_dev) == 0
&& strncmp(file->name, "socket:", 7) == 0) {
str = strdup("sockfs");
break;
}
return false;
default:
return false;
}
if (!str)
err(EXIT_FAILURE, _("failed to add output data"));
if (scols_line_refer_data(ln, column_index, str))
err(EXIT_FAILURE, _("failed to add output data"));
return true;
}
static void init_sock_content(struct file *file)
{
int fd;
assert(file);
fd = file->association;
if (fd >= 0 || fd == -ASSOC_MEM || fd == -ASSOC_SHM) {
struct sock *sock = (struct sock *)file;
char path[PATH_MAX] = {'\0'};
char buf[256];
ssize_t len;
assert(file->proc);
if (fd >= 0)
sprintf(path, "/proc/%d/fd/%d", file->proc->pid, fd);
else
sprintf(path, "/proc/%d/map_files/%"PRIx64 "-%" PRIx64,
file->proc->pid,
file->map_start,
file->map_end);
len = getxattr(path, "system.sockprotoname", buf, sizeof(buf) - 1);
if (len > 0) {
buf[len] = '\0';
sock->protoname = xstrdup(buf);
}
}
}
static void free_sock_content(struct file *file)
{
struct sock *sock = (struct sock *)file;
if (sock->protoname) {
free(sock->protoname);
sock->protoname = NULL;
}
}
const struct file_class sock_class = {
.super = &file_class,
.size = sizeof(struct sock),
.fill_column = sock_fill_column,
.initialize_content = init_sock_content,
.free_content = free_sock_content,
};