mirrored from git://git.sv.gnu.org/coreutils.git
/
stat.c
1973 lines (1828 loc) · 56.4 KB
/
stat.c
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/* stat.c -- display file or file system status
Copyright (C) 2001-2024 Free Software Foundation, Inc.
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 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will 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, see <https://www.gnu.org/licenses/>.
Written by Michael Meskes. */
#include <config.h>
/* Keep this conditional in sync with the similar conditional in
../m4/stat-prog.m4. */
#if ((STAT_STATVFS || STAT_STATVFS64) \
&& (HAVE_STRUCT_STATVFS_F_BASETYPE || HAVE_STRUCT_STATVFS_F_FSTYPENAME \
|| (! HAVE_STRUCT_STATFS_F_FSTYPENAME && HAVE_STRUCT_STATVFS_F_TYPE)))
# define USE_STATVFS 1
#else
# define USE_STATVFS 0
#endif
#include <stdio.h>
#include <sys/types.h>
#include <pwd.h>
#include <grp.h>
#if USE_STATVFS
# include <sys/statvfs.h>
#elif HAVE_SYS_VFS_H
# include <sys/vfs.h>
#elif HAVE_SYS_MOUNT_H && HAVE_SYS_PARAM_H
/* NOTE: freebsd5.0 needs sys/param.h and sys/mount.h for statfs.
It does have statvfs.h, but shouldn't use it, since it doesn't
HAVE_STRUCT_STATVFS_F_BASETYPE. So find a clean way to fix it. */
/* NetBSD 1.5.2 needs these, for the declaration of struct statfs. */
# include <sys/param.h>
# include <sys/mount.h>
# if HAVE_NFS_NFS_CLNT_H && HAVE_NFS_VFS_H
/* Ultrix 4.4 needs these for the declaration of struct statfs. */
# include <netinet/in.h>
# include <nfs/nfs_clnt.h>
# include <nfs/vfs.h>
# endif
#elif HAVE_OS_H /* BeOS */
# include <fs_info.h>
#endif
#include <selinux/selinux.h>
#include <getopt.h>
#include "system.h"
#include "areadlink.h"
#include "argmatch.h"
#include "c-ctype.h"
#include "file-type.h"
#include "filemode.h"
#include "fs.h"
#include "mountlist.h"
#include "octhexdigits.h"
#include "quote.h"
#include "stat-size.h"
#include "stat-time.h"
#include "strftime.h"
#include "find-mount-point.h"
#include "xvasprintf.h"
#include "statx.h"
#if HAVE_STATX && defined STATX_INO
# define USE_STATX 1
#else
# define USE_STATX 0
#endif
#if USE_STATVFS
# define STRUCT_STATXFS_F_FSID_IS_INTEGER STRUCT_STATVFS_F_FSID_IS_INTEGER
# define HAVE_STRUCT_STATXFS_F_TYPE HAVE_STRUCT_STATVFS_F_TYPE
# if HAVE_STRUCT_STATVFS_F_NAMEMAX
# define SB_F_NAMEMAX(S) ((S)->f_namemax)
# endif
# if ! STAT_STATVFS && STAT_STATVFS64
# define STRUCT_STATVFS struct statvfs64
# define STATFS statvfs64
# else
# define STRUCT_STATVFS struct statvfs
# define STATFS statvfs
# endif
# define STATFS_FRSIZE(S) ((S)->f_frsize)
#else
# define HAVE_STRUCT_STATXFS_F_TYPE HAVE_STRUCT_STATFS_F_TYPE
# if HAVE_STRUCT_STATFS_F_NAMELEN
# define SB_F_NAMEMAX(S) ((S)->f_namelen)
# elif HAVE_STRUCT_STATFS_F_NAMEMAX
# define SB_F_NAMEMAX(S) ((S)->f_namemax)
# endif
# define STATFS statfs
# if HAVE_OS_H /* BeOS */
/* BeOS has a statvfs function, but it does not return sensible values
for f_files, f_ffree and f_favail, and lacks f_type, f_basetype and
f_fstypename. Use 'struct fs_info' instead. */
NODISCARD
static int
statfs (char const *filename, struct fs_info *buf)
{
dev_t device = dev_for_path (filename);
if (device < 0)
{
errno = (device == B_ENTRY_NOT_FOUND ? ENOENT
: device == B_BAD_VALUE ? EINVAL
: device == B_NAME_TOO_LONG ? ENAMETOOLONG
: device == B_NO_MEMORY ? ENOMEM
: device == B_FILE_ERROR ? EIO
: 0);
return -1;
}
/* If successful, buf->dev will be == device. */
return fs_stat_dev (device, buf);
}
# define f_fsid dev
# define f_blocks total_blocks
# define f_bfree free_blocks
# define f_bavail free_blocks
# define f_bsize io_size
# define f_files total_nodes
# define f_ffree free_nodes
# define STRUCT_STATVFS struct fs_info
# define STRUCT_STATXFS_F_FSID_IS_INTEGER true
# define STATFS_FRSIZE(S) ((S)->block_size)
# else
# define STRUCT_STATVFS struct statfs
# define STRUCT_STATXFS_F_FSID_IS_INTEGER STRUCT_STATFS_F_FSID_IS_INTEGER
# if HAVE_STRUCT_STATFS_F_FRSIZE
# define STATFS_FRSIZE(S) ((S)->f_frsize)
# else
# define STATFS_FRSIZE(S) 0
# endif
# endif
#endif
#ifdef SB_F_NAMEMAX
# define OUT_NAMEMAX out_uint
#else
/* Depending on whether statvfs or statfs is used,
neither f_namemax or f_namelen may be available. */
# define SB_F_NAMEMAX(S) "?"
# define OUT_NAMEMAX out_string
#endif
#if HAVE_STRUCT_STATVFS_F_BASETYPE
# define STATXFS_FILE_SYSTEM_TYPE_MEMBER_NAME f_basetype
#else
# if HAVE_STRUCT_STATVFS_F_FSTYPENAME || HAVE_STRUCT_STATFS_F_FSTYPENAME
# define STATXFS_FILE_SYSTEM_TYPE_MEMBER_NAME f_fstypename
# elif HAVE_OS_H /* BeOS */
# define STATXFS_FILE_SYSTEM_TYPE_MEMBER_NAME fsh_name
# endif
#endif
#if HAVE_GETATTRAT
# include <attr.h>
# include <sys/nvpair.h>
#endif
static char const digits[] = "0123456789";
/* Flags that are portable for use in printf, for at least one
conversion specifier; make_format removes non-portable flags as
needed for particular specifiers. The glibc 2.2 extension "I" is
listed here; it is removed by make_format because it has undefined
behavior elsewhere and because it is incompatible with
out_epoch_sec. */
static char const printf_flags[] = "'-+ #0I";
/* Formats for the --terse option. */
static char const fmt_terse_fs[] = "%n %i %l %t %s %S %b %f %a %c %d\n";
static char const fmt_terse_regular[] = "%n %s %b %f %u %g %D %i %h %t %T"
" %X %Y %Z %W %o\n";
static char const fmt_terse_selinux[] = "%n %s %b %f %u %g %D %i %h %t %T"
" %X %Y %Z %W %o %C\n";
#define PROGRAM_NAME "stat"
#define AUTHORS proper_name ("Michael Meskes")
enum
{
PRINTF_OPTION = CHAR_MAX + 1
};
enum cached_mode
{
cached_default,
cached_never,
cached_always
};
static char const *const cached_args[] =
{
"default", "never", "always", nullptr
};
static enum cached_mode const cached_modes[] =
{
cached_default, cached_never, cached_always
};
static struct option const long_options[] =
{
{"dereference", no_argument, nullptr, 'L'},
{"file-system", no_argument, nullptr, 'f'},
{"format", required_argument, nullptr, 'c'},
{"printf", required_argument, nullptr, PRINTF_OPTION},
{"terse", no_argument, nullptr, 't'},
{"cached", required_argument, nullptr, 0},
{GETOPT_HELP_OPTION_DECL},
{GETOPT_VERSION_OPTION_DECL},
{nullptr, 0, nullptr, 0}
};
/* Whether to follow symbolic links; True for --dereference (-L). */
static bool follow_links;
/* Whether to interpret backslash-escape sequences.
True for --printf=FMT, not for --format=FMT (-c). */
static bool interpret_backslash_escapes;
/* The trailing delimiter string:
"" for --printf=FMT, "\n" for --format=FMT (-c). */
static char const *trailing_delim = "";
/* The representation of the decimal point in the current locale. */
static char const *decimal_point;
static size_t decimal_point_len;
static bool
print_stat (char *pformat, size_t prefix_len, char mod, char m,
int fd, char const *filename, void const *data);
/* Return the type of the specified file system.
Some systems have statfvs.f_basetype[FSTYPSZ] (AIX, HP-UX, and Solaris).
Others have statvfs.f_fstypename[_VFS_NAMELEN] (NetBSD 3.0).
Others have statfs.f_fstypename[MFSNAMELEN] (NetBSD 1.5.2).
Still others have neither and have to get by with f_type (GNU/Linux).
But f_type may only exist in statfs (Cygwin). */
NODISCARD
static char const *
human_fstype (STRUCT_STATVFS const *statfsbuf)
{
#ifdef STATXFS_FILE_SYSTEM_TYPE_MEMBER_NAME
return statfsbuf->STATXFS_FILE_SYSTEM_TYPE_MEMBER_NAME;
#else
switch (statfsbuf->f_type)
{
# if defined __linux__ || defined __ANDROID__
/* Compare with what's in libc:
f=/a/libc/sysdeps/unix/sysv/linux/linux_fsinfo.h
sed -n '/ADFS_SUPER_MAGIC/,/SYSFS_MAGIC/p' $f \
| perl -n -e '/#define (.*?)_(?:SUPER_)MAGIC\s+0x(\S+)/' \
-e 'and print "case S_MAGIC_$1: /\* 0x" . uc($2) . " *\/\n"' \
| sort > sym_libc
perl -ne '/^\s+(case S_MAGIC_.*?): \/\* 0x(\S+) \*\//' \
-e 'and do { $v=uc$2; print "$1: /\* 0x$v *\/\n"}' stat.c \
| sort > sym_stat
diff -u sym_stat sym_libc
*/
/* Also compare with the list in "man 2 statfs" using the
fs-magic-compare make target. */
/* IMPORTANT NOTE: Each of the following 'case S_MAGIC_...:'
statements must be followed by a hexadecimal constant in
a comment. The S_MAGIC_... name and constant are automatically
combined to produce the #define directives in fs.h. */
case S_MAGIC_AAFS: /* 0x5A3C69F0 local */
return "aafs";
case S_MAGIC_ACFS: /* 0x61636673 remote */
return "acfs";
case S_MAGIC_ADFS: /* 0xADF5 local */
return "adfs";
case S_MAGIC_AFFS: /* 0xADFF local */
return "affs";
case S_MAGIC_AFS: /* 0x5346414F remote */
return "afs";
case S_MAGIC_ANON_INODE_FS: /* 0x09041934 local */
return "anon-inode FS";
case S_MAGIC_AUFS: /* 0x61756673 remote */
/* FIXME: change syntax or add an optional attribute like "inotify:no".
The above is labeled as "remote" so that tail always uses polling,
but this isn't really a remote file system type. */
return "aufs";
case S_MAGIC_AUTOFS: /* 0x0187 local */
return "autofs";
case S_MAGIC_BALLOON_KVM: /* 0x13661366 local */
return "balloon-kvm-fs";
case S_MAGIC_BEFS: /* 0x42465331 local */
return "befs";
case S_MAGIC_BDEVFS: /* 0x62646576 local */
return "bdevfs";
case S_MAGIC_BFS: /* 0x1BADFACE local */
return "bfs";
case S_MAGIC_BINDERFS: /* 0x6C6F6F70 local */
return "binderfs";
case S_MAGIC_BPF_FS: /* 0xCAFE4A11 local */
return "bpf_fs";
case S_MAGIC_BINFMTFS: /* 0x42494E4D local */
return "binfmt_misc";
case S_MAGIC_BTRFS: /* 0x9123683E local */
return "btrfs";
case S_MAGIC_BTRFS_TEST: /* 0x73727279 local */
return "btrfs_test";
case S_MAGIC_CEPH: /* 0x00C36400 remote */
return "ceph";
case S_MAGIC_CGROUP: /* 0x0027E0EB local */
return "cgroupfs";
case S_MAGIC_CGROUP2: /* 0x63677270 local */
return "cgroup2fs";
case S_MAGIC_CIFS: /* 0xFF534D42 remote */
return "cifs";
case S_MAGIC_CODA: /* 0x73757245 remote */
return "coda";
case S_MAGIC_COH: /* 0x012FF7B7 local */
return "coh";
case S_MAGIC_CONFIGFS: /* 0x62656570 local */
return "configfs";
case S_MAGIC_CRAMFS: /* 0x28CD3D45 local */
return "cramfs";
case S_MAGIC_CRAMFS_WEND: /* 0x453DCD28 local */
return "cramfs-wend";
case S_MAGIC_DAXFS: /* 0x64646178 local */
return "daxfs";
case S_MAGIC_DEBUGFS: /* 0x64626720 local */
return "debugfs";
case S_MAGIC_DEVFS: /* 0x1373 local */
return "devfs";
case S_MAGIC_DEVMEM: /* 0x454D444D local */
return "devmem";
case S_MAGIC_DEVPTS: /* 0x1CD1 local */
return "devpts";
case S_MAGIC_DMA_BUF: /* 0x444D4142 local */
return "dma-buf-fs";
case S_MAGIC_ECRYPTFS: /* 0xF15F local */
return "ecryptfs";
case S_MAGIC_EFIVARFS: /* 0xDE5E81E4 local */
return "efivarfs";
case S_MAGIC_EFS: /* 0x00414A53 local */
return "efs";
case S_MAGIC_EROFS_V1: /* 0xE0F5E1E2 local */
return "erofs";
case S_MAGIC_EXFAT: /* 0x2011BAB0 local */
return "exfat";
case S_MAGIC_EXFS: /* 0x45584653 local */
return "exfs";
case S_MAGIC_EXOFS: /* 0x5DF5 local */
return "exofs";
case S_MAGIC_EXT: /* 0x137D local */
return "ext";
case S_MAGIC_EXT2: /* 0xEF53 local */
return "ext2/ext3";
case S_MAGIC_EXT2_OLD: /* 0xEF51 local */
return "ext2";
case S_MAGIC_F2FS: /* 0xF2F52010 local */
return "f2fs";
case S_MAGIC_FAT: /* 0x4006 local */
return "fat";
case S_MAGIC_FHGFS: /* 0x19830326 remote */
return "fhgfs";
case S_MAGIC_FUSEBLK: /* 0x65735546 remote */
return "fuseblk";
case S_MAGIC_FUSECTL: /* 0x65735543 remote */
return "fusectl";
case S_MAGIC_FUTEXFS: /* 0x0BAD1DEA local */
return "futexfs";
case S_MAGIC_GFS: /* 0x01161970 remote */
return "gfs/gfs2";
case S_MAGIC_GPFS: /* 0x47504653 remote */
return "gpfs";
case S_MAGIC_HFS: /* 0x4244 local */
return "hfs";
case S_MAGIC_HFS_PLUS: /* 0x482B local */
return "hfs+";
case S_MAGIC_HFS_X: /* 0x4858 local */
return "hfsx";
case S_MAGIC_HOSTFS: /* 0x00C0FFEE local */
return "hostfs";
case S_MAGIC_HPFS: /* 0xF995E849 local */
return "hpfs";
case S_MAGIC_HUGETLBFS: /* 0x958458F6 local */
return "hugetlbfs";
case S_MAGIC_MTD_INODE_FS: /* 0x11307854 local */
return "inodefs";
case S_MAGIC_IBRIX: /* 0x013111A8 remote */
return "ibrix";
case S_MAGIC_INOTIFYFS: /* 0x2BAD1DEA local */
return "inotifyfs";
case S_MAGIC_ISOFS: /* 0x9660 local */
return "isofs";
case S_MAGIC_ISOFS_R_WIN: /* 0x4004 local */
return "isofs";
case S_MAGIC_ISOFS_WIN: /* 0x4000 local */
return "isofs";
case S_MAGIC_JFFS: /* 0x07C0 local */
return "jffs";
case S_MAGIC_JFFS2: /* 0x72B6 local */
return "jffs2";
case S_MAGIC_JFS: /* 0x3153464A local */
return "jfs";
case S_MAGIC_KAFS: /* 0x6B414653 remote */
return "k-afs";
case S_MAGIC_LOGFS: /* 0xC97E8168 local */
return "logfs";
case S_MAGIC_LUSTRE: /* 0x0BD00BD0 remote */
return "lustre";
case S_MAGIC_M1FS: /* 0x5346314D local */
return "m1fs";
case S_MAGIC_MINIX: /* 0x137F local */
return "minix";
case S_MAGIC_MINIX_30: /* 0x138F local */
return "minix (30 char.)";
case S_MAGIC_MINIX_V2: /* 0x2468 local */
return "minix v2";
case S_MAGIC_MINIX_V2_30: /* 0x2478 local */
return "minix v2 (30 char.)";
case S_MAGIC_MINIX_V3: /* 0x4D5A local */
return "minix3";
case S_MAGIC_MQUEUE: /* 0x19800202 local */
return "mqueue";
case S_MAGIC_MSDOS: /* 0x4D44 local */
return "msdos";
case S_MAGIC_NCP: /* 0x564C remote */
return "novell";
case S_MAGIC_NFS: /* 0x6969 remote */
return "nfs";
case S_MAGIC_NFSD: /* 0x6E667364 remote */
return "nfsd";
case S_MAGIC_NILFS: /* 0x3434 local */
return "nilfs";
case S_MAGIC_NSFS: /* 0x6E736673 local */
return "nsfs";
case S_MAGIC_NTFS: /* 0x5346544E local */
return "ntfs";
case S_MAGIC_OPENPROM: /* 0x9FA1 local */
return "openprom";
case S_MAGIC_OCFS2: /* 0x7461636F remote */
return "ocfs2";
case S_MAGIC_OVERLAYFS: /* 0x794C7630 remote */
/* This may overlay remote file systems.
Also there have been issues reported with inotify and overlayfs,
so mark as "remote" so that polling is used. */
return "overlayfs";
case S_MAGIC_PANFS: /* 0xAAD7AAEA remote */
return "panfs";
case S_MAGIC_PIPEFS: /* 0x50495045 remote */
/* FIXME: change syntax or add an optional attribute like "inotify:no".
pipefs and prlfs are labeled as "remote" so that tail always polls,
but these aren't really remote file system types. */
return "pipefs";
case S_MAGIC_PPC_CMM: /* 0xC7571590 local */
return "ppc-cmm-fs";
case S_MAGIC_PRL_FS: /* 0x7C7C6673 remote */
return "prl_fs";
case S_MAGIC_PROC: /* 0x9FA0 local */
return "proc";
case S_MAGIC_PSTOREFS: /* 0x6165676C local */
return "pstorefs";
case S_MAGIC_QNX4: /* 0x002F local */
return "qnx4";
case S_MAGIC_QNX6: /* 0x68191122 local */
return "qnx6";
case S_MAGIC_RAMFS: /* 0x858458F6 local */
return "ramfs";
case S_MAGIC_RDTGROUP: /* 0x07655821 local */
return "rdt";
case S_MAGIC_REISERFS: /* 0x52654973 local */
return "reiserfs";
case S_MAGIC_ROMFS: /* 0x7275 local */
return "romfs";
case S_MAGIC_RPC_PIPEFS: /* 0x67596969 local */
return "rpc_pipefs";
case S_MAGIC_SDCARDFS: /* 0x5DCA2DF5 local */
return "sdcardfs";
case S_MAGIC_SECRETMEM: /* 0x5345434D local */
return "secretmem";
case S_MAGIC_SECURITYFS: /* 0x73636673 local */
return "securityfs";
case S_MAGIC_SELINUX: /* 0xF97CFF8C local */
return "selinux";
case S_MAGIC_SMACK: /* 0x43415D53 local */
return "smackfs";
case S_MAGIC_SMB: /* 0x517B remote */
return "smb";
case S_MAGIC_SMB2: /* 0xFE534D42 remote */
return "smb2";
case S_MAGIC_SNFS: /* 0xBEEFDEAD remote */
return "snfs";
case S_MAGIC_SOCKFS: /* 0x534F434B local */
return "sockfs";
case S_MAGIC_SQUASHFS: /* 0x73717368 local */
return "squashfs";
case S_MAGIC_SYSFS: /* 0x62656572 local */
return "sysfs";
case S_MAGIC_SYSV2: /* 0x012FF7B6 local */
return "sysv2";
case S_MAGIC_SYSV4: /* 0x012FF7B5 local */
return "sysv4";
case S_MAGIC_TMPFS: /* 0x01021994 local */
return "tmpfs";
case S_MAGIC_TRACEFS: /* 0x74726163 local */
return "tracefs";
case S_MAGIC_UBIFS: /* 0x24051905 local */
return "ubifs";
case S_MAGIC_UDF: /* 0x15013346 local */
return "udf";
case S_MAGIC_UFS: /* 0x00011954 local */
return "ufs";
case S_MAGIC_UFS_BYTESWAPPED: /* 0x54190100 local */
return "ufs";
case S_MAGIC_USBDEVFS: /* 0x9FA2 local */
return "usbdevfs";
case S_MAGIC_V9FS: /* 0x01021997 local */
return "v9fs";
case S_MAGIC_VBOXSF: /* 0x786F4256 remote */
return "vboxsf";
case S_MAGIC_VMHGFS: /* 0xBACBACBC remote */
return "vmhgfs";
case S_MAGIC_VXFS: /* 0xA501FCF5 remote */
/* Veritas File System can run in single instance or clustered mode,
so mark as remote to cater for the latter case. */
return "vxfs";
case S_MAGIC_VZFS: /* 0x565A4653 local */
return "vzfs";
case S_MAGIC_WSLFS: /* 0x53464846 local */
return "wslfs";
case S_MAGIC_XENFS: /* 0xABBA1974 local */
return "xenfs";
case S_MAGIC_XENIX: /* 0x012FF7B4 local */
return "xenix";
case S_MAGIC_XFS: /* 0x58465342 local */
return "xfs";
case S_MAGIC_XIAFS: /* 0x012FD16D local */
return "xia";
case S_MAGIC_Z3FOLD: /* 0x0033 local */
return "z3fold";
case S_MAGIC_ZFS: /* 0x2FC12FC1 local */
return "zfs";
case S_MAGIC_ZONEFS: /* 0x5A4F4653 local */
return "zonefs";
case S_MAGIC_ZSMALLOC: /* 0x58295829 local */
return "zsmallocfs";
# elif __GNU__
case FSTYPE_UFS:
return "ufs";
case FSTYPE_NFS:
return "nfs";
case FSTYPE_GFS:
return "gfs";
case FSTYPE_LFS:
return "lfs";
case FSTYPE_SYSV:
return "sysv";
case FSTYPE_FTP:
return "ftp";
case FSTYPE_TAR:
return "tar";
case FSTYPE_AR:
return "ar";
case FSTYPE_CPIO:
return "cpio";
case FSTYPE_MSLOSS:
return "msloss";
case FSTYPE_CPM:
return "cpm";
case FSTYPE_HFS:
return "hfs";
case FSTYPE_DTFS:
return "dtfs";
case FSTYPE_GRFS:
return "grfs";
case FSTYPE_TERM:
return "term";
case FSTYPE_DEV:
return "dev";
case FSTYPE_PROC:
return "proc";
case FSTYPE_IFSOCK:
return "ifsock";
case FSTYPE_AFS:
return "afs";
case FSTYPE_DFS:
return "dfs";
case FSTYPE_PROC9:
return "proc9";
case FSTYPE_SOCKET:
return "socket";
case FSTYPE_MISC:
return "misc";
case FSTYPE_EXT2FS:
return "ext2/ext3";
case FSTYPE_HTTP:
return "http";
case FSTYPE_MEMFS:
return "memfs";
case FSTYPE_ISO9660:
return "iso9660";
# endif
default:
{
unsigned long int type = statfsbuf->f_type;
static char buf[sizeof "UNKNOWN (0x%lx)" - 3
+ (sizeof type * CHAR_BIT + 3) / 4];
sprintf (buf, "UNKNOWN (0x%lx)", type);
return buf;
}
}
#endif
}
NODISCARD
static char *
human_access (struct stat const *statbuf)
{
static char modebuf[12];
filemodestring (statbuf, modebuf);
modebuf[10] = 0;
return modebuf;
}
NODISCARD
static char *
human_time (struct timespec t)
{
/* STR must be at least INT_BUFSIZE_BOUND (intmax_t) big, either
because localtime_rz fails, or because the time zone is truly
outlandish so that %z expands to a long string. */
static char str[INT_BUFSIZE_BOUND (intmax_t)
+ INT_STRLEN_BOUND (int) /* YYYY */
+ 1 /* because YYYY might equal INT_MAX + 1900 */
+ sizeof "-MM-DD HH:MM:SS.NNNNNNNNN +"];
static timezone_t tz;
if (!tz)
tz = tzalloc (getenv ("TZ"));
struct tm tm;
int ns = t.tv_nsec;
if (localtime_rz (tz, &t.tv_sec, &tm))
nstrftime (str, sizeof str, "%Y-%m-%d %H:%M:%S.%N %z", &tm, tz, ns);
else
{
char secbuf[INT_BUFSIZE_BOUND (intmax_t)];
sprintf (str, "%s.%09d", timetostr (t.tv_sec, secbuf), ns);
}
return str;
}
/* PFORMAT points to a '%' followed by a prefix of a format, all of
size PREFIX_LEN. The flags allowed for this format are
ALLOWED_FLAGS; remove other printf flags from the prefix, then
append SUFFIX. */
static void
make_format (char *pformat, size_t prefix_len, char const *allowed_flags,
char const *suffix)
{
char *dst = pformat + 1;
char const *src;
char const *srclim = pformat + prefix_len;
for (src = dst; src < srclim && strchr (printf_flags, *src); src++)
if (strchr (allowed_flags, *src))
*dst++ = *src;
while (src < srclim)
*dst++ = *src++;
strcpy (dst, suffix);
}
static void
out_string (char *pformat, size_t prefix_len, char const *arg)
{
make_format (pformat, prefix_len, "-", "s");
printf (pformat, arg);
}
static int
out_int (char *pformat, size_t prefix_len, intmax_t arg)
{
make_format (pformat, prefix_len, "'-+ 0", "jd");
return printf (pformat, arg);
}
static int
out_uint (char *pformat, size_t prefix_len, uintmax_t arg)
{
make_format (pformat, prefix_len, "'-0", "ju");
return printf (pformat, arg);
}
static void
out_uint_o (char *pformat, size_t prefix_len, uintmax_t arg)
{
make_format (pformat, prefix_len, "-#0", "jo");
printf (pformat, arg);
}
static void
out_uint_x (char *pformat, size_t prefix_len, uintmax_t arg)
{
make_format (pformat, prefix_len, "-#0", "jx");
printf (pformat, arg);
}
static int
out_minus_zero (char *pformat, size_t prefix_len)
{
make_format (pformat, prefix_len, "'-+ 0", ".0f");
return printf (pformat, -0.25);
}
/* Output the number of seconds since the Epoch, using a format that
acts like printf's %f format. */
static void
out_epoch_sec (char *pformat, size_t prefix_len,
struct timespec arg)
{
char *dot = memchr (pformat, '.', prefix_len);
size_t sec_prefix_len = prefix_len;
int width = 0;
int precision = 0;
bool frac_left_adjust = false;
if (dot)
{
sec_prefix_len = dot - pformat;
pformat[prefix_len] = '\0';
if (ISDIGIT (dot[1]))
{
long int lprec = strtol (dot + 1, nullptr, 10);
precision = (lprec <= INT_MAX ? lprec : INT_MAX);
}
else
{
precision = 9;
}
if (precision && ISDIGIT (dot[-1]))
{
/* If a nontrivial width is given, subtract the width of the
decimal point and PRECISION digits that will be output
later. */
char *p = dot;
*dot = '\0';
do
--p;
while (ISDIGIT (p[-1]));
long int lwidth = strtol (p, nullptr, 10);
width = (lwidth <= INT_MAX ? lwidth : INT_MAX);
if (1 < width)
{
p += (*p == '0');
sec_prefix_len = p - pformat;
int w_d = (decimal_point_len < width
? width - decimal_point_len
: 0);
if (1 < w_d)
{
int w = w_d - precision;
if (1 < w)
{
char *dst = pformat;
for (char const *src = dst; src < p; src++)
{
if (*src == '-')
frac_left_adjust = true;
else
*dst++ = *src;
}
sec_prefix_len =
(dst - pformat
+ (frac_left_adjust ? 0 : sprintf (dst, "%d", w)));
}
}
}
}
}
int divisor = 1;
for (int i = precision; i < 9; i++)
divisor *= 10;
int frac_sec = arg.tv_nsec / divisor;
int int_len;
if (TYPE_SIGNED (time_t))
{
bool minus_zero = false;
if (arg.tv_sec < 0 && arg.tv_nsec != 0)
{
int frac_sec_modulus = 1000000000 / divisor;
frac_sec = (frac_sec_modulus - frac_sec
- (arg.tv_nsec % divisor != 0));
arg.tv_sec += (frac_sec != 0);
minus_zero = (arg.tv_sec == 0);
}
int_len = (minus_zero
? out_minus_zero (pformat, sec_prefix_len)
: out_int (pformat, sec_prefix_len, arg.tv_sec));
}
else
int_len = out_uint (pformat, sec_prefix_len, arg.tv_sec);
if (precision)
{
int prec = (precision < 9 ? precision : 9);
int trailing_prec = precision - prec;
int ilen = (int_len < 0 ? 0 : int_len);
int trailing_width = (ilen < width && decimal_point_len < width - ilen
? width - ilen - decimal_point_len - prec
: 0);
printf ("%s%.*d%-*.*d", decimal_point, prec, frac_sec,
trailing_width, trailing_prec, 0);
}
}
/* Print the context information of FILENAME, and return true iff the
context could not be obtained. */
NODISCARD
static bool
out_file_context (char *pformat, size_t prefix_len, char const *filename)
{
char *scontext;
bool fail = false;
if ((follow_links
? getfilecon (filename, &scontext)
: lgetfilecon (filename, &scontext)) < 0)
{
error (0, errno, _("failed to get security context of %s"),
quoteaf (filename));
scontext = nullptr;
fail = true;
}
strcpy (pformat + prefix_len, "s");
printf (pformat, (scontext ? scontext : "?"));
if (scontext)
freecon (scontext);
return fail;
}
/* Print statfs info. Return zero upon success, nonzero upon failure. */
NODISCARD
static bool
print_statfs (char *pformat, size_t prefix_len, MAYBE_UNUSED char mod, char m,
int fd, char const *filename,
void const *data)
{
STRUCT_STATVFS const *statfsbuf = data;
bool fail = false;
switch (m)
{
case 'n':
out_string (pformat, prefix_len, filename);
break;
case 'i':
{
#if STRUCT_STATXFS_F_FSID_IS_INTEGER
uintmax_t fsid = statfsbuf->f_fsid;
#else
typedef unsigned int fsid_word;
static_assert (alignof (STRUCT_STATVFS) % alignof (fsid_word) == 0);
static_assert (offsetof (STRUCT_STATVFS, f_fsid) % alignof (fsid_word)
== 0);
static_assert (sizeof statfsbuf->f_fsid % alignof (fsid_word) == 0);
fsid_word const *p = (fsid_word *) &statfsbuf->f_fsid;
/* Assume a little-endian word order, as that is compatible
with glibc's statvfs implementation. */
uintmax_t fsid = 0;
int words = sizeof statfsbuf->f_fsid / sizeof *p;
for (int i = 0; i < words && i * sizeof *p < sizeof fsid; i++)
{
uintmax_t u = p[words - 1 - i];
fsid |= u << (i * CHAR_BIT * sizeof *p);
}
#endif
out_uint_x (pformat, prefix_len, fsid);
}
break;
case 'l':
OUT_NAMEMAX (pformat, prefix_len, SB_F_NAMEMAX (statfsbuf));
break;
case 't':
#if HAVE_STRUCT_STATXFS_F_TYPE
out_uint_x (pformat, prefix_len, statfsbuf->f_type);
#else
fputc ('?', stdout);
#endif
break;
case 'T':
out_string (pformat, prefix_len, human_fstype (statfsbuf));
break;
case 'b':
out_int (pformat, prefix_len, statfsbuf->f_blocks);
break;
case 'f':
out_int (pformat, prefix_len, statfsbuf->f_bfree);
break;
case 'a':
out_int (pformat, prefix_len, statfsbuf->f_bavail);
break;
case 's':
out_uint (pformat, prefix_len, statfsbuf->f_bsize);
break;
case 'S':
{
uintmax_t frsize = STATFS_FRSIZE (statfsbuf);
if (! frsize)
frsize = statfsbuf->f_bsize;
out_uint (pformat, prefix_len, frsize);
}
break;
case 'c':
out_uint (pformat, prefix_len, statfsbuf->f_files);
break;
case 'd':
out_int (pformat, prefix_len, statfsbuf->f_ffree);
break;
default:
fputc ('?', stdout);
break;
}
return fail;
}
/* Return any bind mounted source for a path.
The caller should not free the returned buffer.
Return nullptr if no bind mount found. */
NODISCARD
static char const *
find_bind_mount (char const * name)
{
char const * bind_mount = nullptr;
static struct mount_entry *mount_list;
static bool tried_mount_list = false;
if (!tried_mount_list) /* attempt/warn once per process. */
{
if (!(mount_list = read_file_system_list (false)))
error (0, errno, "%s", _("cannot read table of mounted file systems"));
tried_mount_list = true;
}
struct stat name_stats;
if (stat (name, &name_stats) != 0)
return nullptr;
struct mount_entry *me;
for (me = mount_list; me; me = me->me_next)
{
if (me->me_dummy && me->me_devname[0] == '/'
&& STREQ (me->me_mountdir, name))
{
struct stat dev_stats;
if (stat (me->me_devname, &dev_stats) == 0
&& psame_inode (&name_stats, &dev_stats))
{
bind_mount = me->me_devname;
break;
}
}
}
return bind_mount;
}
/* Print mount point. Return zero upon success, nonzero upon failure. */
NODISCARD
static bool
out_mount_point (char const *filename, char *pformat, size_t prefix_len,
const struct stat *statp)
{
char const *np = "?", *bp = nullptr;
char *mp = nullptr;
bool fail = true;
/* Look for bind mounts first. Note we output the immediate alias,
rather than further resolving to a base device mount point. */
if (follow_links || !S_ISLNK (statp->st_mode))
{
char *resolved = canonicalize_file_name (filename);
if (!resolved)
{
error (0, errno, _("failed to canonicalize %s"), quoteaf (filename));