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lsattr,chattr: support -p

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function                                             old     new   delta
fgetsetprojid                                          -     107    +107
list_attributes                                      169     222     +53
change_attributes                                    277     326     +49
chattr_main                                          272     307     +35
close_silently                                         -      22     +22
.rodata                                           103378  103393     +15
packed_usage                                       33658   33666      +8
fgetsetversion                                        88      74     -14
fgetsetflags                                         162     148     -14
------------------------------------------------------------------------------
(add/remove: 2/0 grow/shrink: 5/2 up/down: 289/-28)           Total: 261 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2021-06-20 10:57:24 +02:00
parent 9c291f2cc0
commit 526b834790
5 changed files with 88 additions and 23 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

28
e2fsprogs/chattr.c
View File

@ -20,12 +20,12 @@
//kbuild:lib-$(CONFIG_CHATTR) += chattr.o e2fs_lib.o
//usage:#define chattr_trivial_usage
//usage: "[-R] [-v VERSION] [-+=AacDdijsStTu] FILE..."
//usage: "[-R] [-v VERSION] [-p PROJID] [-+=AacDdijsStTu] FILE..."
//usage:#define chattr_full_usage "\n\n"
//usage: "Change ext2 file attributes\n"
//usage: "\n -R Recurse"
//TODD? "\n -p NUM Set project number"
//usage: "\n -v NUM Set version/generation number"
//usage: "\n -p NUM Set project number"
//-V, -f accepted but ignored
//usage: "\nModifiers:"
//usage: "\n -,+,= Remove/add/set attributes"
@ -45,16 +45,18 @@
#include "libbb.h"
#include "e2fs_lib.h"
#define OPT_ADD 1
#define OPT_REM 2
#define OPT_SET 4
#define OPT_SET_VER 8
#define OPT_ADD (1 << 0)
#define OPT_REM (1 << 1)
#define OPT_SET (1 << 2)
#define OPT_SET_VER (1 << 3)
#define OPT_SET_PROJ (1 << 4)
struct globals {
unsigned long version;
unsigned long af;
unsigned long rf;
int flags;
uint32_t projid;
smallint recursive;
};
@ -108,7 +110,13 @@ static char** decode_arg(char **argv, struct globals *gp)
gp->flags |= OPT_SET_VER;
continue;
}
//TODO: "-p PROJECT_NUM" ?
if (*arg == 'p') {
if (!*++argv)
bb_show_usage();
gp->projid = xatou32(*argv);
gp->flags |= OPT_SET_PROJ;
continue;
}
/* not a known option, try as an attribute */
}
*fl |= get_flag(*arg);
@ -151,7 +159,11 @@ static void change_attributes(const char *name, struct globals *gp)
if (gp->flags & OPT_SET_VER)
if (fsetversion(name, gp->version) != 0)
bb_perror_msg("setting version on %s", name);
bb_perror_msg("setting %s on %s", "version", name);
if (gp->flags & OPT_SET_PROJ)
if (fsetprojid(name, gp->projid) != 0)
bb_perror_msg("setting %s on %s", "project ID", name);
if (gp->flags & OPT_SET) {
fsflags = gp->af;

34
e2fsprogs/e2fs_lib.c
View File

@ -51,14 +51,14 @@ int fgetsetversion(const char *name, unsigned long *get_version, unsigned long s
{
#if HAVE_EXT2_IOCTLS
int fd, r;
IF_LONG_IS_WIDER(int ver;)
IF_LONG_IS_WIDER(unsigned ver;)
fd = open(name, O_RDONLY | O_NONBLOCK);
if (fd == -1)
return -1;
if (!get_version) {
IF_LONG_IS_WIDER(
ver = (int) set_version;
ver = (unsigned) set_version;
r = ioctl(fd, EXT2_IOC_SETVERSION, &ver);
)
IF_LONG_IS_SAME(
@ -81,6 +81,32 @@ int fgetsetversion(const char *name, unsigned long *get_version, unsigned long s
#endif /* ! HAVE_EXT2_IOCTLS */
}
int fgetsetprojid(const char *name, uint32_t *get, uint32_t set)
{
#if HAVE_EXT2_IOCTLS
struct ext2_fsxattr fsxattr;
int fd, r;
fd = open(name, O_RDONLY | O_NONBLOCK);
if (fd == -1)
return -1;
r = ioctl(fd, EXT2_IOC_FSGETXATTR, &fsxattr);
/* note: ^^^ may fail in 32-bit userspace on 64-bit kernel (seen on 4.12.0) */
if (r == 0) {
if (get) {
*get = fsxattr.fsx_projid;
} else {
fsxattr.fsx_projid = set;
r = ioctl(fd, EXT2_IOC_FSSETXATTR, &fsxattr);
}
}
close_silently(fd);
return r;
#else /* ! HAVE_EXT2_IOCTLS */
errno = EOPNOTSUPP;
return -1;
#endif /* ! HAVE_EXT2_IOCTLS */
}
/* Get/set a file flags on an ext2 file system */
int fgetsetflags(const char *name, unsigned long *get_flags, unsigned long set_flags)
@ -88,7 +114,7 @@ int fgetsetflags(const char *name, unsigned long *get_flags, unsigned long set_f
#if HAVE_EXT2_IOCTLS
struct stat buf;
int fd, r;
IF_LONG_IS_WIDER(int f;)
IF_LONG_IS_WIDER(unsigned f;)
if (stat(name, &buf) == 0 /* stat is ok */
&& !S_ISREG(buf.st_mode) && !S_ISDIR(buf.st_mode)
@ -101,7 +127,7 @@ int fgetsetflags(const char *name, unsigned long *get_flags, unsigned long set_f
if (!get_flags) {
IF_LONG_IS_WIDER(
f = (int) set_flags;
f = (unsigned) set_flags;
r = ioctl(fd, EXT2_IOC_SETFLAGS, &f);
)
IF_LONG_IS_SAME(

5
e2fsprogs/e2fs_lib.h
View File

@ -21,6 +21,11 @@ int fgetsetversion(const char *name, unsigned long *get_version, unsigned long s
#define fgetversion(name, version) fgetsetversion(name, version, 0)
#define fsetversion(name, version) fgetsetversion(name, NULL, version)
/* Get/set a file project ID on an ext2 file system */
int fgetsetprojid(const char *name, uint32_t *get, uint32_t set);
#define fgetprojid(name, projid) fgetsetprojid(name, projid, 0)
#define fsetprojid(name, projid) fgetsetprojid(name, NULL, projid)
/* Get/set a file flags on an ext2 file system */
int fgetsetflags(const char *name, unsigned long *get_flags, unsigned long set_flags);
#define fgetflags(name, flags) fgetsetflags(name, flags, 0)

32
e2fsprogs/lsattr.c
View File

@ -21,38 +21,48 @@
//kbuild:lib-$(CONFIG_LSATTR) += lsattr.o e2fs_lib.o
//usage:#define lsattr_trivial_usage
//usage: "[-Radlv] [FILE]..."
//usage: "[-Radlpv] [FILE]..."
//usage:#define lsattr_full_usage "\n\n"
//usage: "List ext2 file attributes\n"
//usage: "\n -R Recurse"
//usage: "\n -a Don't hide entries starting with ."
//usage: "\n -d List directory entries instead of contents"
//usage: "\n -a Include names starting with ."
//usage: "\n -d List directory names, not contents"
// -a,-d text should match ls --help
//usage: "\n -l List long flag names"
//usage: "\n -p List project ID"
//usage: "\n -v List version/generation number"
#include "libbb.h"
#include "e2fs_lib.h"
enum {
OPT_RECUR = 0x1,
OPT_ALL = 0x2,
OPT_DIRS_OPT = 0x4,
OPT_PF_LONG = 0x8,
OPT_GENERATION = 0x10,
OPT_RECUR = 1 << 0,
OPT_ALL = 1 << 1,
OPT_DIRS_OPT = 1 << 2,
OPT_PF_LONG = 1 << 3,
OPT_GENERATION = 1 << 4,
OPT_PROJID = 1 << 5,
};
static void list_attributes(const char *name)
{
unsigned long fsflags;
unsigned long generation;
if (fgetflags(name, &fsflags) != 0)
goto read_err;
if (option_mask32 & OPT_PROJID) {
uint32_t p;
if (fgetprojid(name, &p) != 0)
goto read_err;
printf("%5lu ", (unsigned long)p);
}
if (option_mask32 & OPT_GENERATION) {
unsigned long generation;
if (fgetversion(name, &generation) != 0)
goto read_err;
printf("%5lu ", generation);
printf("%-10lu ", generation);
}
if (option_mask32 & OPT_PF_LONG) {
@ -111,7 +121,7 @@ static void lsattr_args(const char *name)
int lsattr_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int lsattr_main(int argc UNUSED_PARAM, char **argv)
{
getopt32(argv, "Radlv");
getopt32(argv, "Radlvp");
argv += optind;
if (!*argv)

12
include/bb_e2fs_defs.h
View File

@ -195,6 +195,18 @@ struct ext2_dx_countlimit {
#define EXT2_IOC_SETFLAGS _IOW('f', 2, long)
#define EXT2_IOC_GETVERSION _IOR('v', 1, long)
#define EXT2_IOC_SETVERSION _IOW('v', 2, long)
//NB: despite "long" in defs above, these ioctls use an _int_!
//passing them a pointer to long will read/write only int-sized data!
struct ext2_fsxattr {
uint32_t fsx_xflags; /* xflags field value (get/set) */
uint32_t fsx_extsize; /* extsize field value (get/set)*/
uint32_t fsx_nextents; /* nextents field value (get) */
uint32_t fsx_projid; /* project identifier (get/set) */
uint32_t fsx_cowextsize; /* CoW extsize field value (get/set)*/
unsigned char fsx_pad[8];
};
#define EXT2_IOC_FSGETXATTR _IOR('X', 31, struct ext2_fsxattr)
#define EXT2_IOC_FSSETXATTR _IOW('X', 32, struct ext2_fsxattr)
/*
* Structure of an inode on the disk