Adding upstream version 2.38.1.upstream/2.38.1upstream

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

1 files changed, 178 insertions, 0 deletions

diff --git a/misc-utils/lsfd-cdev.c b/misc-utils/lsfd-cdev.c
new file mode 100644
index 0000000..795536a
--- /dev/null
+++ b/misc-utils/lsfd-cdev.c
@@ -0,0 +1,178 @@
+/*
+ * lsfd-cdev.c - handle associations opening character devices
+ *
+ * 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"
+
+static struct list_head miscdevs;
+
+struct miscdev {
+	struct list_head miscdevs;
+	unsigned long minor;
+	char *name;
+};
+
+static bool cdev_fill_column(struct proc *proc __attribute__((__unused__)),
+			     struct file *file __attribute__((__unused__)),
+			     struct libscols_line *ln,
+			     int column_id,
+			     size_t column_index)
+{
+	char *str = NULL;
+	const char *devdrv;
+	const char *miscdev;
+
+	switch(column_id) {
+	case COL_TYPE:
+		if (scols_line_set_data(ln, column_index, "CHR"))
+			err(EXIT_FAILURE, _("failed to add output data"));
+		return true;
+	case COL_MISCDEV:
+		devdrv = get_chrdrv(major(file->stat.st_rdev));
+		if (devdrv && strcmp(devdrv, "misc") == 0) {
+			miscdev = get_miscdev(minor(file->stat.st_rdev));
+			if (miscdev)
+				str = strdup(miscdev);
+			else
+				xasprintf(&str, "%u",
+					  minor(file->stat.st_rdev));
+			break;
+		}
+		return true;
+	case COL_DEVTYPE:
+		if (scols_line_set_data(ln, column_index,
+					"char"))
+			err(EXIT_FAILURE, _("failed to add output data"));
+		return true;
+	case COL_CHRDRV:
+		devdrv = get_chrdrv(major(file->stat.st_rdev));
+		if (devdrv)
+			str = strdup(devdrv);
+		else
+			xasprintf(&str, "%u",
+				  major(file->stat.st_rdev));
+		break;
+	case COL_SOURCE:
+		devdrv = get_chrdrv(major(file->stat.st_rdev));
+		miscdev = NULL;
+		if (devdrv && strcmp(devdrv, "misc") == 0)
+			miscdev = get_miscdev(minor(file->stat.st_rdev));
+		if (devdrv) {
+			if (miscdev) {
+				xasprintf(&str, "misc:%s", miscdev);
+			} else {
+				xasprintf(&str, "%s:%u", devdrv,
+					  minor(file->stat.st_rdev));
+			}
+			break;
+		}
+		/* FALL THROUGH */
+	case COL_MAJMIN:
+		xasprintf(&str, "%u:%u",
+			  major(file->stat.st_rdev),
+			  minor(file->stat.st_rdev));
+		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 struct miscdev *new_miscdev(unsigned long minor, const char *name)
+{
+	struct miscdev *miscdev = xcalloc(1, sizeof(*miscdev));
+
+	INIT_LIST_HEAD(&miscdev->miscdevs);
+
+	miscdev->minor = minor;
+	miscdev->name = xstrdup(name);
+
+	return miscdev;
+}
+
+static void free_miscdev(struct miscdev *miscdev)
+{
+	free(miscdev->name);
+	free(miscdev);
+}
+
+static void read_misc(struct list_head *miscdevs_list, FILE *misc_fp)
+{
+	unsigned long minor;
+	char line[256];
+	char name[sizeof(line)];
+
+	while (fgets(line, sizeof(line), misc_fp)) {
+		struct miscdev *miscdev;
+
+		if (sscanf(line, "%lu %s", &minor, name) != 2)
+			continue;
+
+		miscdev = new_miscdev(minor, name);
+		list_add_tail(&miscdev->miscdevs, miscdevs_list);
+	}
+}
+
+static void cdev_class_initialize(void)
+{
+	FILE *misc_fp;
+
+	INIT_LIST_HEAD(&miscdevs);
+
+	misc_fp = fopen("/proc/misc", "r");
+	if (misc_fp) {
+		read_misc(&miscdevs, misc_fp);
+		fclose(misc_fp);
+	}
+}
+
+static void cdev_class_finalize(void)
+{
+	list_free(&miscdevs, struct miscdev, miscdevs, free_miscdev);
+}
+
+const char *get_miscdev(unsigned long minor)
+{
+	struct list_head *c;
+	list_for_each(c, &miscdevs) {
+		struct miscdev *miscdev = list_entry(c, struct miscdev, miscdevs);
+		if (miscdev->minor == minor)
+			return miscdev->name;
+	}
+	return NULL;
+}
+
+const struct file_class cdev_class = {
+	.super = &file_class,
+	.size = sizeof(struct file),
+	.initialize_class = cdev_class_initialize,
+	.finalize_class = cdev_class_finalize,
+	.fill_column = cdev_fill_column,
+	.free_content = NULL,
+};