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klibc-utils: new applets: resume, nuke, minips

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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 2017-08-18 19:15:29 +02:00
parent 79747415d6
commit ab77e81a85
9 changed files with 201 additions and 1 deletions
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46
klibc-utils/nuke.c Normal file
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@ -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;
}