On Fri, Aug 08, 2025 at 09:30:18PM +0200, Andrey Albershteyn wrote:
> From: Andrey Albershteyn <aalbersh@xxxxxxxxxx>
>
> With new file_getattr/file_setattr syscalls we can now list/change file
> attributes on special files instead for ignoring them.
>
> Signed-off-by: Andrey Albershteyn <aalbersh@xxxxxxxxxx>
> ---
> io/attr.c | 130 ++++++++++++++++++++++++++++++++++++--------------------------
> 1 file changed, 75 insertions(+), 55 deletions(-)
>
> diff --git a/io/attr.c b/io/attr.c
> index fd82a2e73801..1cce602074f4 100644
> --- a/io/attr.c
> +++ b/io/attr.c
> @@ -8,6 +8,7 @@
> #include "input.h"
> #include "init.h"
> #include "io.h"
> +#include "libfrog/file_attr.h"
>
> static cmdinfo_t chattr_cmd;
> static cmdinfo_t lsattr_cmd;
> @@ -156,36 +157,35 @@ lsattr_callback(
> int status,
> struct FTW *data)
> {
> - struct fsxattr fsx;
> - int fd;
> + struct file_attr fa;
> + int error;
>
> if (recurse_dir && !S_ISDIR(stat->st_mode))
> return 0;
>
> - if ((fd = open(path, O_RDONLY)) == -1) {
> - fprintf(stderr, _("%s: cannot open %s: %s\n"),
> - progname, path, strerror(errno));
> - exitcode = 1;
> - } else if ((xfsctl(path, fd, FS_IOC_FSGETXATTR, &fsx)) < 0) {
> + error = file_getattr(AT_FDCWD, path, stat, &fa, AT_SYMLINK_NOFOLLOW);
> + if (error) {
> fprintf(stderr, _("%s: cannot get flags on %s: %s\n"),
> progname, path, strerror(errno));
> exitcode = 1;
> - } else
> - printxattr(fsx.fsx_xflags, 0, 1, path, 0, 1);
> + return 0;
> + }
> +
> + printxattr(fa.fa_xflags, 0, 1, path, 0, 1);
Maybe it's time to rename this printxflags or something that's less
easily confused with extended attributes...
>
> - if (fd != -1)
> - close(fd);
> return 0;
> }
>
> static int
> lsattr_f(
> - int argc,
> - char **argv)
> + int argc,
> + char **argv)
> {
> - struct fsxattr fsx;
> - char *name = file->name;
> - int c, aflag = 0, vflag = 0;
> + struct file_attr fa;
> + char *name = file->name;
> + int c, aflag = 0, vflag = 0;
> + struct stat st;
> + int error;
>
> recurse_all = recurse_dir = 0;
> while ((c = getopt(argc, argv, "DRav")) != EOF) {
> @@ -211,17 +211,27 @@ lsattr_f(
> if (recurse_all || recurse_dir) {
> nftw(name, lsattr_callback,
> 100, FTW_PHYS | FTW_MOUNT | FTW_DEPTH);
> - } else if ((xfsctl(name, file->fd, FS_IOC_FSGETXATTR, &fsx)) < 0) {
> + return 0;
> + }
> +
> + error = stat(name, &st);
> + if (error)
> + return error;
> +
> + error = file_getattr(AT_FDCWD, name, &st, &fa, AT_SYMLINK_NOFOLLOW);
> + if (error) {
> fprintf(stderr, _("%s: cannot get flags on %s: %s\n"),
> progname, name, strerror(errno));
> exitcode = 1;
> - } else {
> - printxattr(fsx.fsx_xflags, vflag, !aflag, name, vflag, !aflag);
> - if (aflag) {
> - fputs("/", stdout);
> - printxattr(-1, 0, 1, name, 0, 1);
> - }
> + return 0;
> }
> +
> + printxattr(fa.fa_xflags, vflag, !aflag, name, vflag, !aflag);
> + if (aflag) {
> + fputs("/", stdout);
> + printxattr(-1, 0, 1, name, 0, 1);
> + }
> +
> return 0;
> }
>
> @@ -232,44 +242,43 @@ chattr_callback(
> int status,
> struct FTW *data)
> {
> - struct fsxattr attr;
> - int fd;
> + struct file_attr attr;
> + int error;
>
> if (recurse_dir && !S_ISDIR(stat->st_mode))
> return 0;
>
> - if ((fd = open(path, O_RDONLY)) == -1) {
> - fprintf(stderr, _("%s: cannot open %s: %s\n"),
> - progname, path, strerror(errno));
> - exitcode = 1;
> - } else if (xfsctl(path, fd, FS_IOC_FSGETXATTR, &attr) < 0) {
> + error = file_getattr(AT_FDCWD, path, stat, &attr, AT_SYMLINK_NOFOLLOW);
> + if (error) {
> fprintf(stderr, _("%s: cannot get flags on %s: %s\n"),
> progname, path, strerror(errno));
> exitcode = 1;
> - } else {
> - attr.fsx_xflags |= orflags;
> - attr.fsx_xflags &= ~andflags;
> - if (xfsctl(path, fd, FS_IOC_FSSETXATTR, &attr) < 0) {
> - fprintf(stderr, _("%s: cannot set flags on %s: %s\n"),
> - progname, path, strerror(errno));
> - exitcode = 1;
> - }
> + return 0;
> + }
> +
> + attr.fa_xflags |= orflags;
> + attr.fa_xflags &= ~andflags;
> + error = file_setattr(AT_FDCWD, path, stat, &attr, AT_SYMLINK_NOFOLLOW);
> + if (error) {
> + fprintf(stderr, _("%s: cannot set flags on %s: %s\n"),
> + progname, path, strerror(errno));
> + exitcode = 1;
> }
>
> - if (fd != -1)
> - close(fd);
> return 0;
> }
>
> static int
> chattr_f(
> - int argc,
> - char **argv)
> + int argc,
> + char **argv)
> {
> - struct fsxattr attr;
> - struct xflags *p;
> - unsigned int i = 0;
> - char *c, *name = file->name;
> + struct file_attr attr;
> + struct xflags *p;
> + unsigned int i = 0;
> + char *c, *name = file->name;
> + struct stat st;
> + int error;
>
> orflags = andflags = 0;
> recurse_all = recurse_dir = 0;
> @@ -326,19 +335,30 @@ chattr_f(
> if (recurse_all || recurse_dir) {
> nftw(name, chattr_callback,
> 100, FTW_PHYS | FTW_MOUNT | FTW_DEPTH);
> - } else if (xfsctl(name, file->fd, FS_IOC_FSGETXATTR, &attr) < 0) {
> + return 0;
> + }
> +
> + error = stat(name, &st);
> + if (error)
> + return error;
> +
> + error = file_getattr(AT_FDCWD, name, &st, &attr, AT_SYMLINK_NOFOLLOW);
> + if (error) {
> fprintf(stderr, _("%s: cannot get flags on %s: %s\n"),
> progname, name, strerror(errno));
> exitcode = 1;
> - } else {
> - attr.fsx_xflags |= orflags;
> - attr.fsx_xflags &= ~andflags;
> - if (xfsctl(name, file->fd, FS_IOC_FSSETXATTR, &attr) < 0) {
> - fprintf(stderr, _("%s: cannot set flags on %s: %s\n"),
> - progname, name, strerror(errno));
> - exitcode = 1;
> - }
> + return 0;
> }
> +
> + attr.fa_xflags |= orflags;
> + attr.fa_xflags &= ~andflags;
> + error = file_setattr(AT_FDCWD, name, &st, &attr, AT_SYMLINK_NOFOLLOW);
For my own curiosity, if you wanted to do the get/set sequence on a file
that's already open, is that just:
file_getattr(fd, "", &attr, AT_EMPTY_PATH | AT_SYMLINK_NOFOLLOW);
...
file_setattr(fd, "", &attr, AT_EMPTY_PATH | AT_SYMLINK_NOFOLLOW);
--D
> + if (error) {
> + fprintf(stderr, _("%s: cannot set flags on %s: %s\n"),
> + progname, name, strerror(errno));
> + exitcode = 1;
> + }
> +
> return 0;
> }
>
>
> --
> 2.49.0
>
>
