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  • Committer: Denys Vlasenko
  • Date: 2017-08-18 17:15:29 UTC
  • Revision ID: git-v1:ab77e81a8527fa11a4f9392d97c2da037d6f4f98
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>

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klibc-utils/nuke.c
 
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/*
 
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 * Copyright (c) 2017 Denys Vlasenko <vda.linux@googlemail.com>
 
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 *
 
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 * Licensed under GPLv2 or later, see file LICENSE in this source tree.
 
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 */
 
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//config:config NUKE
 
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//config:       bool "nuke"
 
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//config:       default y
 
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//config:       help
 
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//config:       Alias to "rm -rf".
 
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//applet:IF_NUKE(APPLET_NOEXEC(nuke, nuke, BB_DIR_BIN, BB_SUID_DROP, nuke))
 
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//kbuild:lib-$(CONFIG_NUKE) += nuke.o
 
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//usage:#define nuke_trivial_usage
 
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//usage:       "DIR..."
 
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//usage:#define nuke_full_usage "\n\n"
 
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//usage:       "Resursively remove DIRs"
 
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#include "libbb.h"
 
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/* This is a NOEXEC applet. Be very careful! */
 
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int nuke_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 
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int nuke_main(int argc UNUSED_PARAM, char **argv)
 
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{
 
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// klibc-utils do not check opts, will try to delete "-dir" args
 
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        //opt = getopt32(argv, "");
 
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        //argv += optind;
 
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        while (*++argv) {
 
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#if 0
 
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// klibc-utils do not check this, will happily operate on ".."
 
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                const char *base = bb_get_last_path_component_strip(*argv);
 
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                if (DOT_OR_DOTDOT(base)) {
 
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                        bb_error_msg("can't remove '.' or '..'");
 
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                        continue;
 
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                }
 
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#endif
 
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                remove_file(*argv, FILEUTILS_FORCE | FILEUTILS_RECUR);
 
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        }
 
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// klibc-utils do not indicate errors
 
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        return EXIT_SUCCESS;
 
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}