Adding upstream version 2.39.3.upstream/2.39.3

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 148 insertions, 0 deletions

diff --git a/misc-utils/lsfd-fifo.c b/misc-utils/lsfd-fifo.c
new file mode 100644
index 0000000..f736192
--- /dev/null
+++ b/misc-utils/lsfd-fifo.c
@@ -0,0 +1,148 @@
+/*
+ * lsfd-fifo.c - handle associations opening fifo 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 "xalloc.h"
+#include "nls.h"
+#include "libsmartcols.h"
+
+#include "lsfd.h"
+
+struct fifo {
+	struct file file;
+	struct ipc_endpoint endpoint;
+};
+
+struct fifo_ipc {
+	struct ipc ipc;
+	ino_t ino;
+};
+
+static inline char *fifo_xstrendpoint(struct file *file)
+{
+	char *str = NULL;
+	xasprintf(&str, "%d,%s,%d%c%c",
+		  file->proc->pid, file->proc->command, file->association,
+		  (file->mode & S_IRUSR)? 'r': '-',
+		  (file->mode & S_IWUSR)? 'w': '-');
+	return str;
+}
+
+static bool fifo_fill_column(struct proc *proc __attribute__((__unused__)),
+			     struct file *file,
+			     struct libscols_line *ln,
+			     int column_id,
+			     size_t column_index)
+{
+	char *str = NULL;
+
+	switch(column_id) {
+	case COL_TYPE:
+		if (scols_line_set_data(ln, column_index, "FIFO"))
+			err(EXIT_FAILURE, _("failed to add output data"));
+		return true;
+	case COL_SOURCE:
+		if (major(file->stat.st_dev) == 0
+		    && strncmp(file->name, "pipe:", 5) == 0) {
+			str = xstrdup("pipefs");
+			break;
+		}
+		return false;
+	case COL_ENDPOINTS: {
+		struct fifo *this = (struct fifo *)file;
+		struct list_head *e;
+		char *estr;
+		list_for_each_backwardly(e, &this->endpoint.ipc->endpoints) {
+			struct fifo *other = list_entry(e, struct fifo, endpoint.endpoints);
+			if (this == other)
+				continue;
+			if (str)
+				xstrputc(&str, '\n');
+			estr = fifo_xstrendpoint(&other->file);
+			xstrappend(&str, estr);
+			free(estr);
+		}
+		if (!str)
+			return false;
+		break;
+	}
+	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 unsigned int fifo_get_hash(struct file *file)
+{
+	return (unsigned int)(file->stat.st_ino % UINT_MAX);
+}
+
+static bool fifo_is_suitable_ipc(struct ipc *ipc, struct file *file)
+{
+	return ((struct fifo_ipc *)ipc)->ino == file->stat.st_ino;
+}
+
+static const struct ipc_class *fifo_get_ipc_class(struct file *file __attribute__((__unused__)))
+{
+	static const struct ipc_class fifo_ipc_class = {
+		.get_hash = fifo_get_hash,
+		.is_suitable_ipc = fifo_is_suitable_ipc,
+		.free = NULL,
+	};
+	return &fifo_ipc_class;
+}
+
+static void fifo_initialize_content(struct file *file)
+{
+	struct fifo *fifo = (struct fifo *)file;
+	struct ipc *ipc;
+	unsigned int hash;
+
+	INIT_LIST_HEAD(&fifo->endpoint.endpoints);
+	ipc = get_ipc(file);
+	if (ipc)
+		goto link;
+
+	ipc = xmalloc(sizeof(struct fifo_ipc));
+	ipc->class = fifo_get_ipc_class(file);
+	INIT_LIST_HEAD(&ipc->endpoints);
+	INIT_LIST_HEAD(&ipc->ipcs);
+	((struct fifo_ipc *)ipc)->ino = file->stat.st_ino;
+
+	hash = fifo_get_hash(file);
+	add_ipc(ipc, hash);
+ link:
+	fifo->endpoint.ipc = ipc;
+	list_add(&fifo->endpoint.endpoints, &ipc->endpoints);
+}
+
+const struct file_class fifo_class = {
+	.super = &file_class,
+	.size = sizeof(struct fifo),
+	.fill_column = fifo_fill_column,
+	.initialize_content = fifo_initialize_content,
+	.free_content = NULL,
+	.get_ipc_class = fifo_get_ipc_class,
+};