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-rw-r--r--misc-utils/lsfd-sock.c126
1 files changed, 126 insertions, 0 deletions
diff --git a/misc-utils/lsfd-sock.c b/misc-utils/lsfd-sock.c
new file mode 100644
index 0000000..0ed5663
--- /dev/null
+++ b/misc-utils/lsfd-sock.c
@@ -0,0 +1,126 @@
+/*
+ * 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,
+};