From mboxrd@z Thu Jan 1 00:00:00 1970 Delivery-date: Mon, 10 Oct 2022 08:45:36 +0200 Received: from metis.ext.pengutronix.de ([2001:67c:670:201:290:27ff:fe1d:cc33]) by lore.white.stw.pengutronix.de with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from ) id 1ohmXh-0034wA-Be for lore@lore.pengutronix.de; Mon, 10 Oct 2022 08:45:36 +0200 Received: from bombadil.infradead.org ([2607:7c80:54:3::133]) by metis.ext.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1ohmXe-0005Us-Qn for lore@pengutronix.de; Mon, 10 Oct 2022 08:45:35 +0200 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: Content-Type:MIME-Version:Message-Id:Date:Subject:Cc:To:From:Reply-To: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References:List-Owner; bh=z1hd6zGm/iyINO1Nq/JI7RdGFcpPVp3ASLIMSAxKlWc=; b=CWLH4r2uQTVCqsZHAqtD5czscj WbeBH+lKkpCts7yI08f6RmVurZ1+eDzgtFf6puzQBEgx4Sqfbnz8ziYUsDj/YzO33MNKevmizwfEN zoE9T3xU27FzeKSioFSUy8t80iVqei3txC27hc5xepV+m93N4fLjc4JsZ24cjRmh7ZwvtMf8ne+JC IrRZ9VrY/DoRfAHuu0RLyvG/FSVsy36QICMmxY9g+KrDsPc1csmoVcLvv1W93NdEWKbt+9HSuincX IpGxE/QObXOZ5v9HQUnyjJa9QOrzpc2NIjKC9A4msXUSUYlgaaVvUFP3u1ZyC3mbXa+nHm+MsJSKV OWBOl4pA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1ohmWM-00HGN8-Vu; Mon, 10 Oct 2022 06:44:15 +0000 Received: from metis.ext.pengutronix.de ([2001:67c:670:201:290:27ff:fe1d:cc33]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1ohmWI-00HGMS-3b for barebox@lists.infradead.org; Mon, 10 Oct 2022 06:44:11 +0000 Received: from drehscheibe.grey.stw.pengutronix.de ([2a0a:edc0:0:c01:1d::a2]) by metis.ext.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1ohmWG-0005NQ-7T; Mon, 10 Oct 2022 08:44:08 +0200 Received: from [2a0a:edc0:0:1101:1d::ac] (helo=dude04.red.stw.pengutronix.de) by drehscheibe.grey.stw.pengutronix.de with esmtp (Exim 4.94.2) (envelope-from ) id 1ohmWF-000dd0-HF; Mon, 10 Oct 2022 08:44:07 +0200 Received: from afa by dude04.red.stw.pengutronix.de with local (Exim 4.94.2) (envelope-from ) id 1ohmWE-008tSy-SC; Mon, 10 Oct 2022 08:44:06 +0200 From: Ahmad Fatoum To: barebox@lists.infradead.org Cc: Ahmad Fatoum Date: Mon, 10 Oct 2022 08:43:58 +0200 Message-Id: <20221010064358.2119629-1-a.fatoum@pengutronix.de> X-Mailer: git-send-email 2.30.2 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20221009_234410_333321_29A007A7 X-CRM114-Status: GOOD ( 20.07 ) X-BeenThere: barebox@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "barebox" X-SA-Exim-Connect-IP: 2607:7c80:54:3::133 X-SA-Exim-Mail-From: barebox-bounces+lore=pengutronix.de@lists.infradead.org X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on metis.ext.pengutronix.de X-Spam-Level: X-Spam-Status: No, score=-4.5 required=4.0 tests=AWL,BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED,SPF_HELO_NONE,SPF_NONE autolearn=unavailable autolearn_force=no version=3.4.2 Subject: [PATCH] commands: add new stat command X-SA-Exim-Version: 4.2.1 (built Wed, 08 May 2019 21:11:16 +0000) X-SA-Exim-Scanned: Yes (on metis.ext.pengutronix.de) 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 --- commands/Kconfig | 14 +++++++ commands/Makefile | 1 + commands/stat.c | 62 ++++++++++++++++++++++++++++ fs/fs.c | 100 +++++++++++++++++++++++++++++++++++++++++++++- include/fs.h | 3 ++ 5 files changed, 179 insertions(+), 1 deletion(-) create mode 100644 commands/stat.c diff --git a/commands/Kconfig b/commands/Kconfig index 3e21dc4c0500..a561a474b404 100644 --- a/commands/Kconfig +++ b/commands/Kconfig @@ -939,6 +939,20 @@ 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 0aae8893d696..7e304e40771b 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..53c22c53aef1 --- /dev/null +++ b/commands/stat.c @@ -0,0 +1,62 @@ +// SPDX-License-Identifier: GPL-2.0-only +// SPDX-FileCopyrightText: © 2022 Ahmad Fatoum, Pengutronix + +#include +#include +#include +#include +#include +#include +#include +#include + +static int do_stat(int argc, char *argv[]) +{ + int (*statfn)(const char *, struct stat *) = stat; + int ret, opt, exitcode = 0; + char **filename; + struct stat st; + + while((opt = getopt(argc, argv, "L")) > 0) { + switch(opt) { + case 'L': + statfn = lstat; + 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 6583e0a6e9b3..0dcc28669e8c 100644 --- a/fs/fs.c +++ b/fs/fs.c @@ -67,6 +67,105 @@ 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) { + const char *devicefile; + + devicefile = devpath_to_name(filename); + + cdev = cdev_by_name(devicefile); + if (cdev) + bdev = cdev_get_block_device(cdev); + } + + 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) : "", + 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 +190,6 @@ 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 894cae3e4c2f..e82b3d8ceb6a 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