We have a couple of commands to help with debugging the VFS:
ll, devinfo, devlookup, but we lack a command that can just dump all
information we have in a struct stat or struct cdev. Add stat as such a
command. For most uses, it's not needed, but it can come in handy for
development. The stat_print and cdev_print functions underlying it are
exported, so they can called for debugging purposes.
Signed-off-by: Ahmad Fatoum <a.fatoum@xxxxxxxxxxxxxx>
---
v1 -> v2:
- support non absolute paths, e.g. dev/mmc0 (Sascha)
- use lstat by default (Sascha)
---
commands/Kconfig | 14 +++++++
commands/Makefile | 1 +
commands/stat.c | 62 +++++++++++++++++++++++++++
fs/fs.c | 105 +++++++++++++++++++++++++++++++++++++++++++++-
include/fs.h | 3 ++
5 files changed, 184 insertions(+), 1 deletion(-)
create mode 100644 commands/stat.c
diff --git a/commands/Kconfig b/commands/Kconfig
index 9894ecb9aa31..2ce990b5616a 100644
--- a/commands/Kconfig
+++ b/commands/Kconfig
@@ -947,6 +947,20 @@ config CMD_LS
-C column format (opposite of long format)
-R list subdirectories recursively
+config CMD_STAT
+ tristate
+ prompt "stat"
+ select PRINTF_UUID
+ help
+ Display file status
+
+ Usage: stat [-L] [FILEDIR...]
+
+ Display status information about the specified files or directories.
+
+ Options:
+ -L follow symlinks
+
config CMD_MD5SUM
tristate
select COMPILE_HASH
diff --git a/commands/Makefile b/commands/Makefile
index 068fbb32dad7..68d0d05365a5 100644
--- a/commands/Makefile
+++ b/commands/Makefile
@@ -26,6 +26,7 @@ obj-$(CONFIG_CMD_POWEROFF) += poweroff.o
obj-$(CONFIG_CMD_GO) += go.o
obj-$(CONFIG_CMD_PARTITION) += partition.o
obj-$(CONFIG_CMD_LS) += ls.o
+obj-$(CONFIG_CMD_STAT) += stat.o
obj-$(CONFIG_CMD_CD) += cd.o
obj-$(CONFIG_CMD_PWD) += pwd.o
obj-$(CONFIG_CMD_MKDIR) += mkdir.o
diff --git a/commands/stat.c b/commands/stat.c
new file mode 100644
index 000000000000..153eac50f1fa
--- /dev/null
+++ b/commands/stat.c
@@ -0,0 +1,62 @@
+// SPDX-License-Identifier: GPL-2.0-only
+// SPDX-FileCopyrightText: © 2022 Ahmad Fatoum, Pengutronix
+
+#include <common.h>
+#include <command.h>
+#include <fs.h>
+#include <linux/stat.h>
+#include <errno.h>
+#include <malloc.h>
+#include <getopt.h>
+#include <stringlist.h>
+
+static int do_stat(int argc, char *argv[])
+{
+ int (*statfn)(const char *, struct stat *) = lstat;
+ int ret, opt, exitcode = 0;
+ char **filename;
+ struct stat st;
+
+ while((opt = getopt(argc, argv, "L")) > 0) {
+ switch(opt) {
+ case 'L':
+ statfn = stat;
+ break;
+ default:
+ return COMMAND_ERROR_USAGE;
+ }
+ }
+
+ if (optind == argc)
+ return COMMAND_ERROR_USAGE;
+
+ for (filename = &argv[optind]; *filename; filename++) {
+ ret = statfn(*filename, &st);
+
+ if (ret) {
+ printf("%s: %s: %m\n", argv[0], *filename);
+ exitcode = COMMAND_ERROR;
+ continue;
+ }
+
+ stat_print(*filename, &st);
+ }
+
+ return exitcode;
+}
+
+BAREBOX_CMD_HELP_START(stat)
+BAREBOX_CMD_HELP_TEXT("Display status information about the specified files")
+BAREBOX_CMD_HELP_TEXT("or directories.")
+BAREBOX_CMD_HELP_TEXT("")
+BAREBOX_CMD_HELP_TEXT("Options:")
+BAREBOX_CMD_HELP_OPT ("-L", "follow links")
+BAREBOX_CMD_HELP_END
+
+BAREBOX_CMD_START(stat)
+ .cmd = do_stat,
+ BAREBOX_CMD_DESC("display file status")
+ BAREBOX_CMD_OPTS("[-L] [FILEDIR...]")
+ BAREBOX_CMD_GROUP(CMD_GRP_FILE)
+ BAREBOX_CMD_HELP(cmd_stat_help)
+BAREBOX_CMD_END
diff --git a/fs/fs.c b/fs/fs.c
index 24a33195440f..8f214204947a 100644
--- a/fs/fs.c
+++ b/fs/fs.c
@@ -67,6 +67,110 @@ char *mkmodestr(unsigned long mode, char *str)
}
EXPORT_SYMBOL(mkmodestr);
+void cdev_print(const struct cdev *cdev)
+{
+ bool uuid_set;
+
+ if (cdev->dev || cdev->master || cdev->partname) {
+ printf("Origin: %s", dev_name(cdev->dev) ?: "None");
+ if (cdev->master)
+ printf("\tMaster: %s", cdev->master->name);
+ if (cdev->partname)
+ printf("\tPartition: %s", cdev->partname);
+ printf("\n");
+ }
+ printf("Ocount: %d\tFlags: 0x%02x", cdev->open, cdev->flags);
+ if (cdev->flags) {
+ printf(" (");
+ if (cdev->flags & DEVFS_IS_CHARACTER_DEV)
+ printf(" cdev");
+ if (cdev->flags & DEVFS_PARTITION_FIXED)
+ printf(" fixed-partition");
+ if (cdev->flags & DEVFS_PARTITION_READONLY)
+ printf(" readonly-partition");
+ if (cdev->flags & DEVFS_PARTITION_FROM_TABLE)
+ printf(" table-partition");
+ if (cdev->flags & DEVFS_IS_MCI_MAIN_PART_DEV)
+ printf(" mci-main-partition");
+ if (cdev->mtd)
+ printf(" mtd");
+ printf(" )");
+ }
+ printf("\n");
+
+ uuid_set = memchr_inv(cdev->uuid, 0x00 ,sizeof(cdev->uuid));
+ if (cdev->filetype || cdev->dos_partition_type || uuid_set) {
+ if (cdev->filetype)
+ printf("Filetype: %s\t", file_type_to_string(cdev->filetype));
+ if (cdev->dos_partition_type)
+ printf("DOS parttype: 0x%02x\t", cdev->dos_partition_type);
+ if (uuid_set)
+ printf("UUID: %pUl", cdev->uuid);
+ printf("\n");
+ }
+}
+EXPORT_SYMBOL(cdev_print);
+
+static struct fs_device_d *get_fsdevice_by_path(const char *path);
+
+void stat_print(const char *filename, const struct stat *st)
+{
+ struct block_device *bdev = NULL;
+ struct fs_device_d *fdev;
+ struct cdev *cdev = NULL;
+ const char *type = NULL;
+ char modestr[11];
+
+ mkmodestr(st->st_mode, modestr);
+
+ switch (st->st_mode & S_IFMT) {
+ case S_IFDIR: type = "directory"; break;
+ case S_IFBLK: type = "block special file"; break;
+ case S_IFCHR: type = "character special file"; break;
+ case S_IFIFO: type = "fifo"; break;
+ case S_IFLNK: type = "symbolic link"; break;
+ case S_IFSOCK: type = "socket"; break;
+ case S_IFREG: type = "regular file"; break;
+ }
+
+ printf(" File: %s\n", filename);
+
+ if (st->st_mode & S_IFCHR) {
+ char *path;
+
+ path = canonicalize_path(filename);
+ if (path) {
+ const char *devicefile = devpath_to_name(path);
+
+ cdev = cdev_by_name(devicefile);
+ if (cdev)
+ bdev = cdev_get_block_device(cdev);
+
+ free(path);
+ }
+ }
+
+ printf(" Size: %-20llu", st->st_size);
+ if (bdev)
+ printf("Blocks: %llu\tIO Block: %u\t",
+ (u64)bdev->num_blocks, 1 << bdev->blockbits);
+
+ if (type)
+ printf(" %s", type);
+
+ fdev = get_fsdevice_by_path(filename);
+
+ printf("\nDevice: %s\tInode: %lu\tLinks: %u\n",
+ fdev ? dev_name(&fdev->dev) : "<unknown>",
+ st->st_ino, st->st_nlink);
+ printf("Access: (%04o/%s)\tUid: (%u)\tGid: (%u)\n",
+ st->st_mode & 07777, modestr, st->st_uid, st->st_gid);
+
+ if (cdev)
+ cdev_print(cdev);
+}
+EXPORT_SYMBOL(stat_print);
+
static char *cwd;
static struct dentry *cwd_dentry;
static struct vfsmount *cwd_mnt;
@@ -91,7 +195,6 @@ postcore_initcall(init_fs);
struct filename;
-static struct fs_device_d *get_fsdevice_by_path(const char *path);
static int filename_lookup(struct filename *name, unsigned flags,
struct path *path);;
static struct filename *getname(const char *filename);
diff --git a/include/fs.h b/include/fs.h
index b501db38addd..f96839f9ebf4 100644
--- a/include/fs.h
+++ b/include/fs.h
@@ -147,6 +147,9 @@ int ls(const char *path, ulong flags);
char *mkmodestr(unsigned long mode, char *str);
+void stat_print(const char *filename, const struct stat *st);
+void cdev_print(const struct cdev *cdev);
+
char *canonicalize_path(const char *pathname);
char *get_mounted_path(const char *path);
--
2.30.2
