klibc-utils: new applets: resume, nuke, minips
minips is a pure alias to ps, just in case someone needs 100% klibc-utils compat. nuke is a primitive version of "rm -rf" without options and error checks. ~30 bytes. resume is a tool for initramfs which resumes from a given block device. function old new delta resume_main - 582 +582 packed_usage 31640 31712 +72 nuke_main - 28 +28 xstrtoull - 24 +24 applet_names 2646 2665 +19 applet_main 1532 1544 +12 applet_suid 96 97 +1 applet_install_loc 192 193 +1 applet_flags 96 97 +1 ------------------------------------------------------------------------------ (add/remove: 5/0 grow/shrink: 6/0 up/down: 740/0) Total: 740 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko
parent
79747415d6
commit
ab77e81a85
@ -691,6 +691,7 @@ source archival/Config.in
|
||||
source coreutils/Config.in
|
||||
source console-tools/Config.in
|
||||
source debianutils/Config.in
|
||||
source klibc-utils/Config.in
|
||||
source editors/Config.in
|
||||
source findutils/Config.in
|
||||
source init/Config.in
|
||||
|
||||
1
Makefile
1
Makefile
@ -470,6 +470,7 @@ libs-y := \
|
||||
coreutils/ \
|
||||
coreutils/libcoreutils/ \
|
||||
debianutils/ \
|
||||
klibc-utils/ \
|
||||
e2fsprogs/ \
|
||||
editors/ \
|
||||
findutils/ \
|
||||
|
||||
10
klibc-utils/Config.src
Normal file
10
klibc-utils/Config.src
Normal file
@ -0,0 +1,10 @@
|
||||
#
|
||||
# For a description of the syntax of this configuration file,
|
||||
# see scripts/kbuild/config-language.txt.
|
||||
#
|
||||
|
||||
menu "klibc-utils"
|
||||
|
||||
INSERT
|
||||
|
||||
endmenu
|
||||
9
klibc-utils/Kbuild.src
Normal file
9
klibc-utils/Kbuild.src
Normal file
@ -0,0 +1,9 @@
|
||||
# Makefile for busybox
|
||||
#
|
||||
# Copyright (C) 1999-2005 by Erik Andersen <andersen@codepoet.org>
|
||||
#
|
||||
# Licensed under GPLv2, see file LICENSE in this source tree.
|
||||
|
||||
lib-y:=
|
||||
|
||||
INSERT
|
||||
12
klibc-utils/minips.c
Normal file
12
klibc-utils/minips.c
Normal file
@ -0,0 +1,12 @@
|
||||
/*
|
||||
* Copyright (c) 2017 Denys Vlasenko <vda.linux@googlemail.com>
|
||||
*
|
||||
* Licensed under GPLv2, see file LICENSE in this source tree.
|
||||
*/
|
||||
//config:config MINIPS
|
||||
//config: bool "minips (11 kb)"
|
||||
//config: default n # for god's sake, just use "ps" name in your scripts
|
||||
//config: help
|
||||
//config: Alias to "ps".
|
||||
|
||||
/* applet abd kbuild hooks are in ps.c */
|
||||
46
klibc-utils/nuke.c
Normal file
46
klibc-utils/nuke.c
Normal file
@ -0,0 +1,46 @@
|
||||
/*
|
||||
* Copyright (c) 2017 Denys Vlasenko <vda.linux@googlemail.com>
|
||||
*
|
||||
* Licensed under GPLv2 or later, see file LICENSE in this source tree.
|
||||
*/
|
||||
//config:config NUKE
|
||||
//config: bool "nuke"
|
||||
//config: default y
|
||||
//config: help
|
||||
//config: Alias to "rm -rf".
|
||||
|
||||
//applet:IF_NUKE(APPLET_NOEXEC(nuke, nuke, BB_DIR_BIN, BB_SUID_DROP, nuke))
|
||||
|
||||
//kbuild:lib-$(CONFIG_NUKE) += nuke.o
|
||||
|
||||
//usage:#define nuke_trivial_usage
|
||||
//usage: "DIR..."
|
||||
//usage:#define nuke_full_usage "\n\n"
|
||||
//usage: "Resursively remove DIRs"
|
||||
|
||||
#include "libbb.h"
|
||||
|
||||
/* This is a NOEXEC applet. Be very careful! */
|
||||
|
||||
int nuke_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
|
||||
int nuke_main(int argc UNUSED_PARAM, char **argv)
|
||||
{
|
||||
// klibc-utils do not check opts, will try to delete "-dir" args
|
||||
//opt = getopt32(argv, "");
|
||||
//argv += optind;
|
||||
|
||||
while (*++argv) {
|
||||
#if 0
|
||||
// klibc-utils do not check this, will happily operate on ".."
|
||||
const char *base = bb_get_last_path_component_strip(*argv);
|
||||
if (DOT_OR_DOTDOT(base)) {
|
||||
bb_error_msg("can't remove '.' or '..'");
|
||||
continue;
|
||||
}
|
||||
#endif
|
||||
remove_file(*argv, FILEUTILS_FORCE | FILEUTILS_RECUR);
|
||||
}
|
||||
|
||||
// klibc-utils do not indicate errors
|
||||
return EXIT_SUCCESS;
|
||||
}
|
||||
115
klibc-utils/resume.c
Normal file
115
klibc-utils/resume.c
Normal file
@ -0,0 +1,115 @@
|
||||
/*
|
||||
* Copyright (c) 2017 Denys Vlasenko <vda.linux@googlemail.com>
|
||||
*
|
||||
* Licensed under GPLv2 or later, see file LICENSE in this source tree.
|
||||
*/
|
||||
//config:config RESUME
|
||||
//config: bool "resume"
|
||||
//config: default y
|
||||
//config: help
|
||||
//config: Resume from saved "suspend-to-disk" image
|
||||
|
||||
//applet:IF_RESUME(APPLET_NOEXEC(resume, resume, BB_DIR_BIN, BB_SUID_DROP, resume))
|
||||
|
||||
//kbuild:lib-$(CONFIG_RESUME) += resume.o
|
||||
|
||||
#include "libbb.h"
|
||||
|
||||
/* This is a NOEXEC applet. Be very careful! */
|
||||
|
||||
/* name_to_dev_t() in klibc-utils supports extended device name formats,
|
||||
* apart from the usual case where /dev/NAME already exists.
|
||||
*
|
||||
* - device number in hexadecimal represents itself (in dev_t layout).
|
||||
* - device number in major:minor decimal represents itself.
|
||||
* - if block device (or partition) with this name is found in sysfs.
|
||||
* - if /dev/ prefix is not given, it is assumed.
|
||||
*
|
||||
* klibc-utils also recognizes these, but they don't work
|
||||
* for "resume" tool purposes (thus we don't support them (yet?)):
|
||||
* - /dev/nfs
|
||||
* - /dev/ram (alias to /dev/ram0)
|
||||
* - /dev/mtd
|
||||
*/
|
||||
static dev_t name_to_dev_t(const char *devname)
|
||||
{
|
||||
char devfile[sizeof(int)*3 * 2 + 4];
|
||||
char *sysname;
|
||||
unsigned major_num, minor_num;
|
||||
struct stat st;
|
||||
int r;
|
||||
|
||||
if (strncmp(devname, "/dev/", 5) != 0) {
|
||||
char *cptr;
|
||||
|
||||
cptr = strchr(devname, ':');
|
||||
if (cptr) {
|
||||
/* Colon-separated decimal device number? */
|
||||
*cptr = '\0';
|
||||
major_num = bb_strtou(devname, NULL, 10);
|
||||
if (!errno)
|
||||
minor_num = bb_strtou(cptr + 1, NULL, 10);
|
||||
*cptr = ':';
|
||||
if (!errno)
|
||||
return makedev(major_num, minor_num);
|
||||
} else {
|
||||
/* Hexadecimal device number? */
|
||||
dev_t res = (dev_t) bb_strtoul(devname, NULL, 16);
|
||||
if (!errno)
|
||||
return res;
|
||||
}
|
||||
|
||||
devname = xasprintf("/dev/%s", devname);
|
||||
}
|
||||
/* Now devname is always "/dev/FOO" */
|
||||
|
||||
if (stat(devname, &st) == 0 && S_ISBLK(st.st_mode))
|
||||
return st.st_rdev;
|
||||
|
||||
/* Full blockdevs as well as partitions may be visible
|
||||
* in /sys/class/block/ even if /dev is not populated.
|
||||
*/
|
||||
sysname = xasprintf("/sys/class/block/%s/dev", devname + 5);
|
||||
r = open_read_close(sysname, devfile, sizeof(devfile) - 1);
|
||||
//free(sysname);
|
||||
if (r > 0) {
|
||||
devfile[r] = '\0';
|
||||
if (sscanf(devfile, "%u:%u", &major_num, &minor_num) == 2) {
|
||||
return makedev(major_num, minor_num);
|
||||
}
|
||||
}
|
||||
|
||||
return (dev_t) 0;
|
||||
}
|
||||
|
||||
//usage:#define resume_trivial_usage
|
||||
//usage: "BLOCKDEV [OFFSET]"
|
||||
//usage:#define resume_full_usage "\n"
|
||||
//usage: "\n""Restore system state from 'suspend-to-disk' data in BLOCKDEV"
|
||||
|
||||
int resume_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
|
||||
int resume_main(int argc UNUSED_PARAM, char **argv)
|
||||
{
|
||||
unsigned long long ofs;
|
||||
dev_t resume_device;
|
||||
char *s;
|
||||
int fd;
|
||||
|
||||
argv++;
|
||||
if (!argv[0])
|
||||
bb_show_usage();
|
||||
|
||||
resume_device = name_to_dev_t(argv[0]);
|
||||
if (major(resume_device) == 0) {
|
||||
bb_error_msg_and_die("invalid resume device: %s", argv[0]);
|
||||
}
|
||||
ofs = (argv[1] ? xstrtoull(argv[1], 0) : 0);
|
||||
|
||||
fd = xopen("/sys/power/resume", O_WRONLY);
|
||||
s = xasprintf("%u:%u:%llu", major(resume_device), minor(resume_device), ofs);
|
||||
|
||||
xwrite_str(fd, s);
|
||||
/* if write() returns, resume did not succeed */
|
||||
|
||||
return EXIT_FAILURE; /* klibc-utils exits -1 aka 255 */
|
||||
}
|
||||
@ -50,9 +50,12 @@
|
||||
//config: Include support for measuring HZ on old kernels and non-ELF systems
|
||||
//config: (if you are on Linux 2.4.0+ and use ELF, you don't need this)
|
||||
|
||||
// APPLET_NOEXEC:name main location suid_type help
|
||||
//applet:IF_PS( APPLET_NOEXEC(ps, ps, BB_DIR_BIN, BB_SUID_DROP, ps))
|
||||
//applet:IF_MINIPS(APPLET_NOEXEC(minips, ps, BB_DIR_BIN, BB_SUID_DROP, ps))
|
||||
|
||||
//kbuild:lib-$(CONFIG_PS) += ps.o
|
||||
//kbuild:lib-$(CONFIG_MINIPS) += ps.o
|
||||
|
||||
//usage:#if ENABLE_DESKTOP
|
||||
//usage:
|
||||
|
||||
@ -115,6 +115,9 @@ lib-y:=
|
||||
include debianutils/Kbuild
|
||||
lib-all-y += $(patsubst %,debianutils/%,$(sort $(lib-y)))
|
||||
lib-y:=
|
||||
include klibc-utils/Kbuild
|
||||
lib-all-y += $(patsubst %,klibc-utils/%,$(sort $(lib-y)))
|
||||
lib-y:=
|
||||
include runit/Kbuild
|
||||
lib-all-y += $(patsubst %,runit/%,$(sort $(lib-y)))
|
||||
lib-y:=
|
||||
|
||||
Loading…
Reference in New Issue
Block a user