From 135bca574c31b7bf6df6c63d28f180956928dde7 Mon Sep 17 00:00:00 2001 From: Paul Eggert Date: Sun, 1 Oct 2017 22:31:39 -0700 Subject: [PATCH] Port file-system-info to non-Microsoft * admin/merge-gnulib (GNULIB_MODULES): Add fsusage. * doc/emacs/files.texi (Directories): Remove documentation of now-obsolete directory-free-space-program and directory-free-space-args. * etc/NEWS: Mention change. * etc/PROBLEMS: Slow df is no longer a problem. * lib/fsusage.c, lib/fsusage.h, m4/fsusage.m4: New files, copied from Gnulib. * lib/gnulib.mk.in, m4/gnulib-comp.m4: Regenerate. * lisp/dired.el (dired-free-space-program) (dired-free-space-args): These aliases are now obsolete. * lisp/files.el (directory-free-space-program) (directory-free-space-args): Now obsolete. (get-free-disk-space): Just call file-system-info instead of the now-obsolete directory-free-space-program. * nt/gnulib-cfg.mk (OMIT_GNULIB_MODULE_fsusage): New macro. * src/fileio.c: Include fsusage.h. (blocks_to_bytes, Ffile_system_info) [!DOS_NT]: New functions. (syms_of_fileio) [!DOS_NT]: Defsubr file-system-info. --- admin/merge-gnulib | 2 +- doc/emacs/files.texi | 7 +- etc/NEWS | 4 + etc/PROBLEMS | 10 +- lib/fsusage.c | 288 +++++++++++++++++++++++++++++++++++++++++++ lib/fsusage.h | 40 ++++++ lib/gnulib.mk.in | 13 +- lisp/dired.el | 6 +- lisp/files.el | 49 ++------ m4/fsusage.m4 | 336 +++++++++++++++++++++++++++++++++++++++++++++++++++ m4/gnulib-comp.m4 | 9 ++ nt/gnulib-cfg.mk | 1 + src/fileio.c | 39 ++++++ 13 files changed, 750 insertions(+), 54 deletions(-) create mode 100644 lib/fsusage.c create mode 100644 lib/fsusage.h create mode 100644 m4/fsusage.m4 diff --git a/admin/merge-gnulib b/admin/merge-gnulib index 60104e8..4b1dc59 100755 --- a/admin/merge-gnulib +++ b/admin/merge-gnulib @@ -33,7 +33,7 @@ GNULIB_MODULES= d-type diffseq dtoastr dtotimespec dup2 environ execinfo explicit_bzero faccessat fcntl fcntl-h fdatasync fdopendir - filemode filevercmp flexmember fstatat fsync + filemode filevercmp flexmember fstatat fsusage fsync getloadavg getopt-gnu gettime gettimeofday gitlog-to-changelog ignore-value intprops largefile lstat manywarnings memrchr minmax mkostemp mktime nstrftime diff --git a/doc/emacs/files.texi b/doc/emacs/files.texi index 18f1c28..2c4a0ca 100644 --- a/doc/emacs/files.texi +++ b/doc/emacs/files.texi @@ -1279,13 +1279,8 @@ Directories giving the switches to use in a verbose listing (@code{"-l"} by default). address@hidden directory-free-space-program address@hidden directory-free-space-args In verbose directory listings, Emacs adds information about the -amount of free space on the disk that contains the directory. To do -this, it runs the program specified by address@hidden with arguments address@hidden +amount of free space on the disk that contains the directory. The command @kbd{M-x delete-directory} prompts for a directory's name using the minibuffer, and deletes the directory if it is empty. If diff --git a/etc/NEWS b/etc/NEWS index 42c1b04..28789a9 100644 --- a/etc/NEWS +++ b/etc/NEWS @@ -73,6 +73,10 @@ calling 'eldoc-message' directly. * Lisp Changes in Emacs 27.1 +** The 'file-system-info' function is now available on all platforms. +instead of just Microsoft platforms. This fixes a get-free-disk-space +bug on OS X 10.8 and later (Bug#28639). + * Changes in Emacs 27.1 on Non-Free Operating Systems diff --git a/etc/PROBLEMS b/etc/PROBLEMS index 94c78b6..2da9932 100644 --- a/etc/PROBLEMS +++ b/etc/PROBLEMS @@ -557,7 +557,7 @@ and then choose /usr/bin/netkit-ftp. *** Dired is very slow. -This could happen if invocation of the 'df' program takes a long +This could happen if getting a file system's status takes a long time. Possible reasons for this include: - ClearCase mounted filesystems (VOBs) that sometimes make 'df' @@ -565,12 +565,8 @@ time. Possible reasons for this include: - slow automounters on some old versions of Unix; - - slow operation of some versions of 'df'. - -To work around the problem, you could either (a) set the variable -'directory-free-space-program' to nil, and thus prevent Emacs from -invoking 'df'; (b) use 'df' from the GNU Coreutils package; or -(c) use CVS, which is Free Software, instead of ClearCase. +To work around the problem, you could use Git or some other +free-software program, instead of ClearCase. *** ps-print commands fail to find prologue files ps-prin*.ps. diff --git a/lib/fsusage.c b/lib/fsusage.c new file mode 100644 index 0000000..a0f763b --- /dev/null +++ b/lib/fsusage.c @@ -0,0 +1,288 @@ +/* fsusage.c -- return space usage of mounted file systems + + Copyright (C) 1991-1992, 1996, 1998-1999, 2002-2006, 2009-2017 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 . */ + +#include + +#include "fsusage.h" + +#include +#include + +#if STAT_STATVFS || STAT_STATVFS64 /* POSIX 1003.1-2001 (and later) with XSI */ +# include +#else +/* Don't include backward-compatibility files unless they're needed. + Eventually we'd like to remove all this cruft. */ +# include +# include +# include +#if HAVE_SYS_PARAM_H +# include +#endif +#if HAVE_SYS_MOUNT_H +# include +#endif +#if HAVE_SYS_VFS_H +# include +#endif +# if HAVE_SYS_FS_S5PARAM_H /* Fujitsu UXP/V */ +# include +# endif +# if HAVE_SYS_STATFS_H +# include +# endif +# if HAVE_DUSTAT_H /* AIX PS/2 */ +# include +# endif +# include "full-read.h" +#endif + +/* Many space usage primitives use all 1 bits to denote a value that is + not applicable or unknown. Propagate this information by returning + a uintmax_t value that is all 1 bits if X is all 1 bits, even if X + is unsigned and narrower than uintmax_t. */ +#define PROPAGATE_ALL_ONES(x) \ + ((sizeof (x) < sizeof (uintmax_t) \ + && (~ (x) == (sizeof (x) < sizeof (int) \ + ? - (1 << (sizeof (x) * CHAR_BIT)) \ + : 0))) \ + ? UINTMAX_MAX : (uintmax_t) (x)) + +/* Extract the top bit of X as an uintmax_t value. */ +#define EXTRACT_TOP_BIT(x) ((x) \ + & ((uintmax_t) 1 << (sizeof (x) * CHAR_BIT - 1))) + +/* If a value is negative, many space usage primitives store it into an + integer variable by assignment, even if the variable's type is unsigned. + So, if a space usage variable X's top bit is set, convert X to the + uintmax_t value V such that (- (uintmax_t) V) is the negative of + the original value. If X's top bit is clear, just yield X. + Use PROPAGATE_TOP_BIT if the original value might be negative; + otherwise, use PROPAGATE_ALL_ONES. */ +#define PROPAGATE_TOP_BIT(x) ((x) | ~ (EXTRACT_TOP_BIT (x) - 1)) + +#ifdef STAT_STATVFS +/* Return true if statvfs works. This is false for statvfs on systems + with GNU libc on Linux kernels before 2.6.36, which stats all + preceding entries in /proc/mounts; that makes df hang if even one + of the corresponding file systems is hard-mounted but not available. */ +# if ! (__linux__ && (__GLIBC__ || __UCLIBC__)) +/* The FRSIZE fallback is not required in this case. */ +# undef STAT_STATFS2_FRSIZE +static int statvfs_works (void) { return 1; } +# else +# include /* for strverscmp */ +# include +# include +# define STAT_STATFS2_BSIZE 1 + +static int +statvfs_works (void) +{ + static int statvfs_works_cache = -1; + struct utsname name; + if (statvfs_works_cache < 0) + statvfs_works_cache = (uname (&name) == 0 + && 0 <= strverscmp (name.release, "2.6.36")); + return statvfs_works_cache; +} +# endif +#endif + + +/* Fill in the fields of FSP with information about space usage for + the file system on which FILE resides. + DISK is the device on which FILE is mounted, for space-getting + methods that need to know it. + Return 0 if successful, -1 if not. When returning -1, ensure that + ERRNO is either a system error value, or zero if DISK is NULL + on a system that requires a non-NULL value. */ +int +get_fs_usage (char const *file, char const *disk, struct fs_usage *fsp) +{ +#ifdef STAT_STATVFS /* POSIX, except pre-2.6.36 glibc/Linux */ + + if (statvfs_works ()) + { + struct statvfs vfsd; + + if (statvfs (file, &vfsd) < 0) + return -1; + + /* f_frsize isn't guaranteed to be supported. */ + fsp->fsu_blocksize = (vfsd.f_frsize + ? PROPAGATE_ALL_ONES (vfsd.f_frsize) + : PROPAGATE_ALL_ONES (vfsd.f_bsize)); + + fsp->fsu_blocks = PROPAGATE_ALL_ONES (vfsd.f_blocks); + fsp->fsu_bfree = PROPAGATE_ALL_ONES (vfsd.f_bfree); + fsp->fsu_bavail = PROPAGATE_TOP_BIT (vfsd.f_bavail); + fsp->fsu_bavail_top_bit_set = EXTRACT_TOP_BIT (vfsd.f_bavail) != 0; + fsp->fsu_files = PROPAGATE_ALL_ONES (vfsd.f_files); + fsp->fsu_ffree = PROPAGATE_ALL_ONES (vfsd.f_ffree); + return 0; + } + +#endif + +#if defined STAT_STATVFS64 /* AIX */ + + struct statvfs64 fsd; + + if (statvfs64 (file, &fsd) < 0) + return -1; + + /* f_frsize isn't guaranteed to be supported. */ + fsp->fsu_blocksize = (fsd.f_frsize + ? PROPAGATE_ALL_ONES (fsd.f_frsize) + : PROPAGATE_ALL_ONES (fsd.f_bsize)); + +#elif defined STAT_STATFS2_FS_DATA /* Ultrix */ + + struct fs_data fsd; + + if (statfs (file, &fsd) != 1) + return -1; + + fsp->fsu_blocksize = 1024; + fsp->fsu_blocks = PROPAGATE_ALL_ONES (fsd.fd_req.btot); + fsp->fsu_bfree = PROPAGATE_ALL_ONES (fsd.fd_req.bfree); + fsp->fsu_bavail = PROPAGATE_TOP_BIT (fsd.fd_req.bfreen); + fsp->fsu_bavail_top_bit_set = EXTRACT_TOP_BIT (fsd.fd_req.bfreen) != 0; + fsp->fsu_files = PROPAGATE_ALL_ONES (fsd.fd_req.gtot); + fsp->fsu_ffree = PROPAGATE_ALL_ONES (fsd.fd_req.gfree); + +#elif defined STAT_STATFS3_OSF1 /* OSF/1 */ + + struct statfs fsd; + + if (statfs (file, &fsd, sizeof (struct statfs)) != 0) + return -1; + + fsp->fsu_blocksize = PROPAGATE_ALL_ONES (fsd.f_fsize); + +#elif defined STAT_STATFS2_FRSIZE /* 2.6 < glibc/Linux < 2.6.36 */ + + struct statfs fsd; + + if (statfs (file, &fsd) < 0) + return -1; + + fsp->fsu_blocksize = PROPAGATE_ALL_ONES (fsd.f_frsize); + +#elif defined STAT_STATFS2_BSIZE /* glibc/Linux < 2.6, 4.3BSD, SunOS 4, \ + Mac OS X < 10.4, FreeBSD < 5.0, \ + NetBSD < 3.0, OpenBSD < 4.4 */ + + struct statfs fsd; + + if (statfs (file, &fsd) < 0) + return -1; + + fsp->fsu_blocksize = PROPAGATE_ALL_ONES (fsd.f_bsize); + +# ifdef STATFS_TRUNCATES_BLOCK_COUNTS + + /* In SunOS 4.1.2, 4.1.3, and 4.1.3_U1, the block counts in the + struct statfs are truncated to 2GB. These conditions detect that + truncation, presumably without botching the 4.1.1 case, in which + the values are not truncated. The correct counts are stored in + undocumented spare fields. */ + if (fsd.f_blocks == 0x7fffffff / fsd.f_bsize && fsd.f_spare[0] > 0) + { + fsd.f_blocks = fsd.f_spare[0]; + fsd.f_bfree = fsd.f_spare[1]; + fsd.f_bavail = fsd.f_spare[2]; + } +# endif /* STATFS_TRUNCATES_BLOCK_COUNTS */ + +#elif defined STAT_STATFS2_FSIZE /* 4.4BSD and older NetBSD */ + + struct statfs fsd; + + if (statfs (file, &fsd) < 0) + return -1; + + fsp->fsu_blocksize = PROPAGATE_ALL_ONES (fsd.f_fsize); + +#elif defined STAT_STATFS4 /* SVR3, Dynix, old Irix, old AIX, \ + Dolphin */ + +# if !_AIX && !defined _SEQUENT_ && !defined DOLPHIN +# define f_bavail f_bfree +# endif + + struct statfs fsd; + + if (statfs (file, &fsd, sizeof fsd, 0) < 0) + return -1; + + /* Empirically, the block counts on most SVR3 and SVR3-derived + systems seem to always be in terms of 512-byte blocks, + no matter what value f_bsize has. */ +# if _AIX || defined _CRAY + fsp->fsu_blocksize = PROPAGATE_ALL_ONES (fsd.f_bsize); +# else + fsp->fsu_blocksize = 512; +# endif + +#endif + +#if (defined STAT_STATVFS64 || defined STAT_STATFS3_OSF1 \ + || defined STAT_STATFS2_FRSIZE || defined STAT_STATFS2_BSIZE \ + || defined STAT_STATFS2_FSIZE || defined STAT_STATFS4) + + fsp->fsu_blocks = PROPAGATE_ALL_ONES (fsd.f_blocks); + fsp->fsu_bfree = PROPAGATE_ALL_ONES (fsd.f_bfree); + fsp->fsu_bavail = PROPAGATE_TOP_BIT (fsd.f_bavail); + fsp->fsu_bavail_top_bit_set = EXTRACT_TOP_BIT (fsd.f_bavail) != 0; + fsp->fsu_files = PROPAGATE_ALL_ONES (fsd.f_files); + fsp->fsu_ffree = PROPAGATE_ALL_ONES (fsd.f_ffree); + +#endif + + (void) disk; /* avoid argument-unused warning */ + return 0; +} + +#if defined _AIX && defined _I386 +/* AIX PS/2 does not supply statfs. */ + +int +statfs (char *file, struct statfs *fsb) +{ + struct stat stats; + struct dustat fsd; + + if (stat (file, &stats) != 0) + return -1; + if (dustat (stats.st_dev, 0, &fsd, sizeof (fsd))) + return -1; + fsb->f_type = 0; + fsb->f_bsize = fsd.du_bsize; + fsb->f_blocks = fsd.du_fsize - fsd.du_isize; + fsb->f_bfree = fsd.du_tfree; + fsb->f_bavail = fsd.du_tfree; + fsb->f_files = (fsd.du_isize - 2) * fsd.du_inopb; + fsb->f_ffree = fsd.du_tinode; + fsb->f_fsid.val[0] = fsd.du_site; + fsb->f_fsid.val[1] = fsd.du_pckno; + return 0; +} + +#endif /* _AIX && _I386 */ diff --git a/lib/fsusage.h b/lib/fsusage.h new file mode 100644 index 0000000..f78edc6 --- /dev/null +++ b/lib/fsusage.h @@ -0,0 +1,40 @@ +/* fsusage.h -- declarations for file system space usage info + + Copyright (C) 1991-1992, 1997, 2003-2006, 2009-2017 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 . */ + +/* Space usage statistics for a file system. Blocks are 512-byte. */ + +#if !defined FSUSAGE_H_ +# define FSUSAGE_H_ + +# include +# include + +struct fs_usage +{ + uintmax_t fsu_blocksize; /* Size of a block. */ + uintmax_t fsu_blocks; /* Total blocks. */ + uintmax_t fsu_bfree; /* Free blocks available to superuser. */ + uintmax_t fsu_bavail; /* Free blocks available to non-superuser. */ + bool fsu_bavail_top_bit_set; /* 1 if fsu_bavail represents a value < 0. */ + uintmax_t fsu_files; /* Total file nodes. */ + uintmax_t fsu_ffree; /* Free file nodes. */ +}; + +int get_fs_usage (char const *file, char const *disk, struct fs_usage *fsp); + +#endif diff --git a/lib/gnulib.mk.in b/lib/gnulib.mk.in index 0f795b3..e9358a6 100644 --- a/lib/gnulib.mk.in +++ b/lib/gnulib.mk.in @@ -21,7 +21,7 @@ # the same distribution terms as the rest of that program. # # Generated by gnulib-tool. -# Reproduce by: gnulib-tool --import --lib=libgnu --source-base=lib --m4-base=m4 --doc-base=doc --tests-base=tests --aux-dir=build-aux --avoid=close --avoid=dup --avoid=fchdir --avoid=fstat --avoid=malloc-posix --avoid=msvc-inval --avoid=msvc-nothrow --avoid=openat-die --avoid=opendir --avoid=raise --avoid=save-cwd --avoid=select --avoid=setenv --avoid=sigprocmask --avoid=stat --avoid=stdarg --avoid=stdbool --avoid=threadlib --avoid=tzset --avoid=unsetenv --avoid=utime --avoid=utime-h --gnu-make --makefile-name=gnulib.mk.in --conditional-dependencies --no-libtool --macro-prefix=gl --no-vc-files alloca-opt binary-io byteswap c-ctype c-strcase careadlinkat close-stream count-leading-zeros count-one-bits count-trailing-zeros crypto/md5 crypto/sha1 crypto/sha256 crypto/sha512 d-type diffseq dtoastr dtotimespec dup2 environ execinfo explicit_bzero faccessat fcntl fcntl-h fdatasync fdopendir filemode filevercmp flexmember fstatat fsync getloadavg getopt-gnu gettime gettimeofday gitlog-to-changelog ignore-value intprops largefile lstat manywarnings memrchr minmax mkostemp mktime nstrftime pipe2 pselect pthread_sigmask putenv qcopy-acl readlink readlinkat sig2str socklen stat-time std-gnu11 stdalign stddef stdio stpcpy strtoimax symlink sys_stat sys_time tempname time time_r time_rz timegm timer-time timespec-add timespec-sub unlocked-io update-copyright utimens vla warnings +# Reproduce by: gnulib-tool --import --lib=libgnu --source-base=lib --m4-base=m4 --doc-base=doc --tests-base=tests --aux-dir=build-aux --avoid=close --avoid=dup --avoid=fchdir --avoid=fstat --avoid=malloc-posix --avoid=msvc-inval --avoid=msvc-nothrow --avoid=openat-die --avoid=opendir --avoid=raise --avoid=save-cwd --avoid=select --avoid=setenv --avoid=sigprocmask --avoid=stat --avoid=stdarg --avoid=stdbool --avoid=threadlib --avoid=tzset --avoid=unsetenv --avoid=utime --avoid=utime-h --gnu-make --makefile-name=gnulib.mk.in --conditional-dependencies --no-libtool --macro-prefix=gl --no-vc-files alloca-opt binary-io byteswap c-ctype c-strcase careadlinkat close-stream count-leading-zeros count-one-bits count-trailing-zeros crypto/md5 crypto/sha1 crypto/sha256 crypto/sha512 d-type diffseq dtoastr dtotimespec dup2 environ execinfo explicit_bzero faccessat fcntl fcntl-h fdatasync fdopendir filemode filevercmp flexmember fstatat fsusage fsync getloadavg getopt-gnu gettime gettimeofday gitlog-to-changelog ignore-value intprops largefile lstat manywarnings memrchr minmax mkostemp mktime nstrftime pipe2 pselect pthread_sigmask putenv qcopy-acl readlink readlinkat sig2str socklen stat-time std-gnu11 stdalign stddef stdio stpcpy strtoimax symlink sys_stat sys_time tempname time time_r time_rz timegm timer-time timespec-add timespec-sub unlocked-io update-copyright utimens vla warnings MOSTLYCLEANFILES += core *.stackdump @@ -1516,6 +1516,17 @@ EXTRA_libgnu_a_SOURCES += at-func.c fstatat.c endif ## end gnulib module fstatat +## begin gnulib module fsusage +ifeq (,$(OMIT_GNULIB_MODULE_fsusage)) + + +EXTRA_DIST += fsusage.c fsusage.h + +EXTRA_libgnu_a_SOURCES += fsusage.c + +endif +## end gnulib module fsusage + ## begin gnulib module fsync ifeq (,$(OMIT_GNULIB_MODULE_fsync)) diff --git a/lisp/dired.el b/lisp/dired.el index 9e09d34..1ec3ac4 100644 --- a/lisp/dired.el +++ b/lisp/dired.el @@ -198,8 +198,10 @@ dired-copy-preserve-time ; These variables were deleted and the replacements are on files.el. ; We leave aliases behind for back-compatibility. -(defvaralias 'dired-free-space-program 'directory-free-space-program) -(defvaralias 'dired-free-space-args 'directory-free-space-args) +(define-obsolete-variable-alias 'dired-free-space-program + 'directory-free-space-program "27.1") +(define-obsolete-variable-alias 'dired-free-space-args + 'directory-free-space-args "27.1") ;;; Hook variables diff --git a/lisp/files.el b/lisp/files.el index 336bbc8..194c87a 100644 --- a/lisp/files.el +++ b/lisp/files.el @@ -6386,58 +6386,33 @@ directory-free-space-program A value of nil disables this feature. -If the function `file-system-info' is defined, it is always used in -preference to the program given by this variable." +This variable is obsolete; Emacs no longer uses it." :type '(choice (string :tag "Program") (const :tag "None" nil)) :group 'dired) +(make-obsolete-variable 'directory-free-space-program + "ignored, as Emacs uses `file-system-info' instead" + "27.1") (defcustom directory-free-space-args (purecopy (if (eq system-type 'darwin) "-k" "-Pk")) "Options to use when running `directory-free-space-program'." :type 'string :group 'dired) +(make-obsolete-variable 'directory-free-space-args + "ignored, as Emacs uses `file-system-info' instead" + "27.1") (defun get-free-disk-space (dir) "Return the amount of free space on directory DIR's file system. The return value is a string describing the amount of free space (normally, the number of free 1KB blocks). -This function calls `file-system-info' if it is available, or -invokes the program specified by `directory-free-space-program' -and `directory-free-space-args'. If the system call or program -is unsuccessful, or if DIR is a remote directory, this function -returns nil." +If DIR's free space cannot be obtained, or if DIR is a remote +directory, this function returns nil." (unless (file-remote-p (expand-file-name dir)) - ;; Try to find the number of free blocks. Non-Posix systems don't - ;; always have df, but might have an equivalent system call. - (if (fboundp 'file-system-info) - (let ((fsinfo (file-system-info dir))) - (if fsinfo - (format "%.0f" (/ (nth 2 fsinfo) 1024)))) - (setq dir (expand-file-name dir)) - (save-match-data - (with-temp-buffer - (when (and directory-free-space-program - ;; Avoid failure if the default directory does - ;; not exist (Bug#2631, Bug#3911). - (let ((default-directory - (locate-dominating-file dir 'file-directory-p))) - (eq (process-file directory-free-space-program - nil t nil - directory-free-space-args - (file-relative-name dir)) - 0))) - ;; Assume that the "available" column is before the - ;; "capacity" column. Find the "%" and scan backward. - (goto-char (point-min)) - (forward-line 1) - (when (re-search-forward - "[[:space:]]+[^[:space:]]+%[^%]*$" - (line-end-position) t) - (goto-char (match-beginning 0)) - (let ((endpt (point))) - (skip-chars-backward "^[:space:]") - (buffer-substring-no-properties (point) endpt))))))))) + (let ((avail (nth 2 (file-system-info dir)))) + (if avail + (format "%.0f" (/ avail 1024)))))) ;; The following expression replaces `dired-move-to-filename-regexp'. (defvar directory-listing-before-filename-regexp diff --git a/m4/fsusage.m4 b/m4/fsusage.m4 new file mode 100644 index 0000000..1d6ad41 --- /dev/null +++ b/m4/fsusage.m4 @@ -0,0 +1,336 @@ +# serial 32 +# Obtaining file system usage information. + +# Copyright (C) 1997-1998, 2000-2001, 2003-2017 Free Software Foundation, Inc. +# +# This file is free software; the Free Software Foundation +# gives unlimited permission to copy and/or distribute it, +# with or without modifications, as long as this notice is preserved. + +# Written by Jim Meyering. + +AC_DEFUN([gl_FSUSAGE], +[ + AC_CHECK_HEADERS_ONCE([sys/param.h]) + AC_CHECK_HEADERS_ONCE([sys/vfs.h sys/fs_types.h]) + AC_CHECK_HEADERS([sys/mount.h], [], [], + [AC_INCLUDES_DEFAULT + [#if HAVE_SYS_PARAM_H + #include + #endif]]) + gl_FILE_SYSTEM_USAGE([gl_cv_fs_space=yes], [gl_cv_fs_space=no]) +]) + +# Try to determine how a program can obtain file system usage information. +# If successful, define the appropriate symbol (see fsusage.c) and +# execute ACTION-IF-FOUND. Otherwise, execute ACTION-IF-NOT-FOUND. +# +# gl_FILE_SYSTEM_USAGE([ACTION-IF-FOUND[, ACTION-IF-NOT-FOUND]]) + +AC_DEFUN([gl_FILE_SYSTEM_USAGE], +[ +dnl Enable large-file support. This has the effect of changing the size +dnl of field f_blocks in 'struct statvfs' from 32 bit to 64 bit on +dnl glibc/Hurd, HP-UX 11, Solaris (32-bit mode). It also changes the size +dnl of field f_blocks in 'struct statfs' from 32 bit to 64 bit on +dnl Mac OS X >= 10.5 (32-bit mode). +AC_REQUIRE([AC_SYS_LARGEFILE]) + +AC_MSG_CHECKING([how to get file system space usage]) +ac_fsusage_space=no + +# Perform only the link test since it seems there are no variants of the +# statvfs function. This check is more than just AC_CHECK_FUNCS([statvfs]) +# because that got a false positive on SCO OSR5. Adding the declaration +# of a 'struct statvfs' causes this test to fail (as it should) on such +# systems. That system is reported to work fine with STAT_STATFS4 which +# is what it gets when this test fails. +if test $ac_fsusage_space = no; then + # glibc/{Hurd,kFreeBSD}, FreeBSD >= 5.0, NetBSD >= 3.0, + # OpenBSD >= 4.4, AIX, HP-UX, IRIX, Solaris, Cygwin, Interix, BeOS. + AC_CACHE_CHECK([for statvfs function (SVR4)], [fu_cv_sys_stat_statvfs], + [AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include +#ifdef __osf__ +"Do not use Tru64's statvfs implementation" +#endif + +#include + +struct statvfs fsd; + +#if defined __APPLE__ && defined __MACH__ +#include +/* On Mac OS X >= 10.5, f_blocks in 'struct statvfs' is a 32-bit quantity; + that commonly limits file systems to 4 TiB. Whereas f_blocks in + 'struct statfs' is a 64-bit type, thanks to the large-file support + that was enabled above. In this case, don't use statvfs(); use statfs() + instead. */ +int check_f_blocks_size[sizeof fsd.f_blocks * CHAR_BIT <= 32 ? -1 : 1]; +#endif +]], + [[statvfs (0, &fsd);]])], + [fu_cv_sys_stat_statvfs=yes], + [fu_cv_sys_stat_statvfs=no])]) + if test $fu_cv_sys_stat_statvfs = yes; then + ac_fsusage_space=yes + # AIX >= 5.2 has statvfs64 that has a wider f_blocks field than statvfs. + # glibc, HP-UX, IRIX, Solaris have statvfs64 as well, but on these systems + # statvfs with large-file support is already equivalent to statvfs64. + AC_CACHE_CHECK([whether to use statvfs64], + [fu_cv_sys_stat_statvfs64], + [AC_LINK_IFELSE( + [AC_LANG_PROGRAM( + [[#include + #include + struct statvfs64 fsd; + int check_f_blocks_larger_in_statvfs64 + [sizeof (((struct statvfs64 *) 0)->f_blocks) + > sizeof (((struct statvfs *) 0)->f_blocks) + ? 1 : -1]; + ]], + [[statvfs64 (0, &fsd);]])], + [fu_cv_sys_stat_statvfs64=yes], + [fu_cv_sys_stat_statvfs64=no]) + ]) + if test $fu_cv_sys_stat_statvfs64 = yes; then + AC_DEFINE([STAT_STATVFS64], [1], + [ Define if statvfs64 should be preferred over statvfs.]) + else + AC_DEFINE([STAT_STATVFS], [1], + [ Define if there is a function named statvfs. (SVR4)]) + fi + fi +fi + +# Check for this unconditionally so we have a +# good fallback on glibc/Linux > 2.6 < 2.6.36 +AC_MSG_CHECKING([for two-argument statfs with statfs.f_frsize member]) +AC_CACHE_VAL([fu_cv_sys_stat_statfs2_frsize], +[AC_RUN_IFELSE([AC_LANG_SOURCE([[ +#ifdef HAVE_SYS_PARAM_H +#include +#endif +#ifdef HAVE_SYS_MOUNT_H +#include +#endif +#ifdef HAVE_SYS_VFS_H +#include +#endif + int + main () + { + struct statfs fsd; + fsd.f_frsize = 0; + return statfs (".", &fsd) != 0; + }]])], + [fu_cv_sys_stat_statfs2_frsize=yes], + [fu_cv_sys_stat_statfs2_frsize=no], + [fu_cv_sys_stat_statfs2_frsize=no])]) +AC_MSG_RESULT([$fu_cv_sys_stat_statfs2_frsize]) +if test $fu_cv_sys_stat_statfs2_frsize = yes; then + ac_fsusage_space=yes + AC_DEFINE([STAT_STATFS2_FRSIZE], [1], +[ Define if statfs takes 2 args and struct statfs has a field named f_frsize. + (glibc/Linux > 2.6)]) +fi + +if test $ac_fsusage_space = no; then + # DEC Alpha running OSF/1 + AC_MSG_CHECKING([for 3-argument statfs function (DEC OSF/1)]) + AC_CACHE_VAL([fu_cv_sys_stat_statfs3_osf1], + [AC_RUN_IFELSE([AC_LANG_SOURCE([[ +#include +#include +#include + int + main () + { + struct statfs fsd; + fsd.f_fsize = 0; + return statfs (".", &fsd, sizeof (struct statfs)) != 0; + }]])], + [fu_cv_sys_stat_statfs3_osf1=yes], + [fu_cv_sys_stat_statfs3_osf1=no], + [fu_cv_sys_stat_statfs3_osf1=no])]) + AC_MSG_RESULT([$fu_cv_sys_stat_statfs3_osf1]) + if test $fu_cv_sys_stat_statfs3_osf1 = yes; then + ac_fsusage_space=yes + AC_DEFINE([STAT_STATFS3_OSF1], [1], + [ Define if statfs takes 3 args. (DEC Alpha running OSF/1)]) + fi +fi + +if test $ac_fsusage_space = no; then + # glibc/Linux, Mac OS X, FreeBSD < 5.0, NetBSD < 3.0, OpenBSD < 4.4. + # (glibc/{Hurd,kFreeBSD}, FreeBSD >= 5.0, NetBSD >= 3.0, + # OpenBSD >= 4.4, AIX, HP-UX, OSF/1, Cygwin already handled above.) + # (On IRIX you need to include , not only and + # .) + # (On Solaris, statfs has 4 arguments.) + AC_MSG_CHECKING([for two-argument statfs with statfs.f_bsize dnl +member (AIX, 4.3BSD)]) + AC_CACHE_VAL([fu_cv_sys_stat_statfs2_bsize], + [AC_RUN_IFELSE([AC_LANG_SOURCE([[ +#ifdef HAVE_SYS_PARAM_H +#include +#endif +#ifdef HAVE_SYS_MOUNT_H +#include +#endif +#ifdef HAVE_SYS_VFS_H +#include +#endif + int + main () + { + struct statfs fsd; + fsd.f_bsize = 0; + return statfs (".", &fsd) != 0; + }]])], + [fu_cv_sys_stat_statfs2_bsize=yes], + [fu_cv_sys_stat_statfs2_bsize=no], + [fu_cv_sys_stat_statfs2_bsize=no])]) + AC_MSG_RESULT([$fu_cv_sys_stat_statfs2_bsize]) + if test $fu_cv_sys_stat_statfs2_bsize = yes; then + ac_fsusage_space=yes + AC_DEFINE([STAT_STATFS2_BSIZE], [1], +[ Define if statfs takes 2 args and struct statfs has a field named f_bsize. + (4.3BSD, SunOS 4, HP-UX, AIX PS/2)]) + fi +fi + +if test $ac_fsusage_space = no; then + # SVR3 + # (Solaris already handled above.) + AC_MSG_CHECKING([for four-argument statfs (AIX-3.2.5, SVR3)]) + AC_CACHE_VAL([fu_cv_sys_stat_statfs4], + [AC_RUN_IFELSE([AC_LANG_SOURCE([[ +#include +#include + int + main () + { + struct statfs fsd; + return statfs (".", &fsd, sizeof fsd, 0) != 0; + }]])], + [fu_cv_sys_stat_statfs4=yes], + [fu_cv_sys_stat_statfs4=no], + [fu_cv_sys_stat_statfs4=no])]) + AC_MSG_RESULT([$fu_cv_sys_stat_statfs4]) + if test $fu_cv_sys_stat_statfs4 = yes; then + ac_fsusage_space=yes + AC_DEFINE([STAT_STATFS4], [1], + [ Define if statfs takes 4 args. (SVR3, Dynix, old Irix, old AIX, Dolphin)]) + fi +fi + +if test $ac_fsusage_space = no; then + # 4.4BSD and older NetBSD + # (OSF/1 already handled above.) + # (On AIX, you need to include , not only .) + # (On Solaris, statfs has 4 arguments and 'struct statfs' is not declared in + # .) + AC_MSG_CHECKING([for two-argument statfs with statfs.f_fsize dnl +member (4.4BSD and NetBSD)]) + AC_CACHE_VAL([fu_cv_sys_stat_statfs2_fsize], + [AC_RUN_IFELSE([AC_LANG_SOURCE([[ +#include +#ifdef HAVE_SYS_PARAM_H +#include +#endif +#ifdef HAVE_SYS_MOUNT_H +#include +#endif + int + main () + { + struct statfs fsd; + fsd.f_fsize = 0; + return statfs (".", &fsd) != 0; + }]])], + [fu_cv_sys_stat_statfs2_fsize=yes], + [fu_cv_sys_stat_statfs2_fsize=no], + [fu_cv_sys_stat_statfs2_fsize=no])]) + AC_MSG_RESULT([$fu_cv_sys_stat_statfs2_fsize]) + if test $fu_cv_sys_stat_statfs2_fsize = yes; then + ac_fsusage_space=yes + AC_DEFINE([STAT_STATFS2_FSIZE], [1], +[ Define if statfs takes 2 args and struct statfs has a field named f_fsize. + (4.4BSD, NetBSD)]) + fi +fi + +if test $ac_fsusage_space = no; then + # Ultrix + AC_MSG_CHECKING([for two-argument statfs with struct fs_data (Ultrix)]) + AC_CACHE_VAL([fu_cv_sys_stat_fs_data], + [AC_RUN_IFELSE([AC_LANG_SOURCE([[ +#include +#ifdef HAVE_SYS_PARAM_H +#include +#endif +#ifdef HAVE_SYS_MOUNT_H +#include +#endif +#ifdef HAVE_SYS_FS_TYPES_H +#include +#endif + int + main () + { + struct fs_data fsd; + /* Ultrix's statfs returns 1 for success, + 0 for not mounted, -1 for failure. */ + return statfs (".", &fsd) != 1; + }]])], + [fu_cv_sys_stat_fs_data=yes], + [fu_cv_sys_stat_fs_data=no], + [fu_cv_sys_stat_fs_data=no])]) + AC_MSG_RESULT([$fu_cv_sys_stat_fs_data]) + if test $fu_cv_sys_stat_fs_data = yes; then + ac_fsusage_space=yes + AC_DEFINE([STAT_STATFS2_FS_DATA], [1], +[ Define if statfs takes 2 args and the second argument has + type struct fs_data. (Ultrix)]) + fi +fi + +AS_IF([test $ac_fsusage_space = yes], [$1], [$2]) + +]) + + +# Check for SunOS statfs brokenness wrt partitions 2GB and larger. +# If exists and struct statfs has a member named f_spare, +# enable the work-around code in fsusage.c. +AC_DEFUN([gl_STATFS_TRUNCATES], +[ + AC_MSG_CHECKING([for statfs that truncates block counts]) + AC_CACHE_VAL([fu_cv_sys_truncating_statfs], + [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ +#if !defined(sun) && !defined(__sun) +choke -- this is a workaround for a Sun-specific problem +#endif +#include +#include ]], + [[struct statfs t; long c = *(t.f_spare); + if (c) return 0;]])], + [fu_cv_sys_truncating_statfs=yes], + [fu_cv_sys_truncating_statfs=no])]) + if test $fu_cv_sys_truncating_statfs = yes; then + AC_DEFINE([STATFS_TRUNCATES_BLOCK_COUNTS], [1], + [Define if the block counts reported by statfs may be truncated to 2GB + and the correct values may be stored in the f_spare array. + (SunOS 4.1.2, 4.1.3, and 4.1.3_U1 are reported to have this problem. + SunOS 4.1.1 seems not to be affected.)]) + fi + AC_MSG_RESULT([$fu_cv_sys_truncating_statfs]) +]) + + +# Prerequisites of lib/fsusage.c not done by gl_FILE_SYSTEM_USAGE. +AC_DEFUN([gl_PREREQ_FSUSAGE_EXTRA], +[ + AC_CHECK_HEADERS([dustat.h sys/fs/s5param.h sys/statfs.h]) + gl_STATFS_TRUNCATES +]) diff --git a/m4/gnulib-comp.m4 b/m4/gnulib-comp.m4 index c551752..cb255fc 100644 --- a/m4/gnulib-comp.m4 +++ b/m4/gnulib-comp.m4 @@ -87,6 +87,7 @@ AC_DEFUN # Code from module flexmember: # Code from module fpending: # Code from module fstatat: + # Code from module fsusage: # Code from module fsync: # Code from module getdtablesize: # Code from module getgroups: @@ -256,6 +257,11 @@ AC_DEFUN AC_LIBOBJ([fstatat]) fi gl_SYS_STAT_MODULE_INDICATOR([fstatat]) + gl_FSUSAGE + if test $gl_cv_fs_space = yes; then + AC_LIBOBJ([fsusage]) + gl_PREREQ_FSUSAGE_EXTRA + fi gl_FUNC_FSYNC if test $HAVE_FSYNC = 0; then AC_LIBOBJ([fsync]) @@ -864,6 +870,8 @@ AC_DEFUN lib/fpending.c lib/fpending.h lib/fstatat.c + lib/fsusage.c + lib/fsusage.h lib/fsync.c lib/ftoastr.c lib/ftoastr.h @@ -995,6 +1003,7 @@ AC_DEFUN m4/flexmember.m4 m4/fpending.m4 m4/fstatat.m4 + m4/fsusage.m4 m4/fsync.m4 m4/getdtablesize.m4 m4/getgroups.m4 diff --git a/nt/gnulib-cfg.mk b/nt/gnulib-cfg.mk index 419099e..f621667 100644 --- a/nt/gnulib-cfg.mk +++ b/nt/gnulib-cfg.mk @@ -49,6 +49,7 @@ OMIT_GNULIB_MODULE_dirent = OMIT_GNULIB_MODULE_dirfd = true OMIT_GNULIB_MODULE_fcntl = true OMIT_GNULIB_MODULE_fcntl-h = true +OMIT_GNULIB_MODULE_fsusage = true OMIT_GNULIB_MODULE_inttypes-incomplete = true OMIT_GNULIB_MODULE_open = true OMIT_GNULIB_MODULE_pipe2 = true diff --git a/src/fileio.c b/src/fileio.c index adb3534..1137027 100644 --- a/src/fileio.c +++ b/src/fileio.c @@ -96,6 +96,7 @@ along with GNU Emacs. If not, see . */ #include #include #include +#include #include #include @@ -5765,6 +5766,40 @@ effect except for flushing STREAM's data. */) return (set_binary_mode (fileno (fp), binmode) == O_BINARY) ? Qt : Qnil; } +#ifndef DOS_NT + +/* Yield a Lisp float as close as possible to BLOCKSIZE * BLOCKS, with + the result negated if NEGATE. */ +static Lisp_Object +blocks_to_bytes (uintmax_t blocksize, uintmax_t blocks, bool negate) +{ + /* On typical platforms the following code is accurate to 53 bits, + which is close enough. BLOCKSIZE is invariably a power of 2, so + converting it to double does not lose information. */ + double bs = blocksize; + return make_float (negate ? -bs * -blocks : bs * blocks); +} + +DEFUN ("file-system-info", Ffile_system_info, Sfile_system_info, 1, 1, 0, + doc: /* Return storage information about the file system FILENAME is on. +Value is a list of numbers (TOTAL FREE AVAIL), where TOTAL is the total +storage of the file system, FREE is the free storage, and AVAIL is the +storage available to a non-superuser. All 3 numbers are in bytes. +If the underlying system call fails, value is nil. */) + (Lisp_Object filename) +{ + Lisp_Object encoded = ENCODE_FILE (Fexpand_file_name (filename, Qnil)); + struct fs_usage u; + if (get_fs_usage (SSDATA (encoded), NULL, &u) != 0) + return Qnil; + return list3 (blocks_to_bytes (u.fsu_blocksize, u.fsu_blocks, false), + blocks_to_bytes (u.fsu_blocksize, u.fsu_bfree, false), + blocks_to_bytes (u.fsu_blocksize, u.fsu_bavail, + u.fsu_bavail_top_bit_set)); +} + +#endif /* !DOS_NT */ + void init_fileio (void) { @@ -6115,6 +6150,10 @@ This includes interactive calls to `delete-file' and defsubr (&Sset_binary_mode); +#ifndef DOS_NT + defsubr (&Sfile_system_info); +#endif + #ifdef HAVE_SYNC defsubr (&Sunix_sync); #endif -- 2.7.4