findutils/*: move usage and applet bits to *.c files

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

findutils/grep.c

@@ -14,13 +14,16 @@
  * 2004,2006 (C) Vladimir Oleynik <dzo@simtreas.ru> -
  * correction "-e pattern1 -e pattern2" logic and more optimizations.
  * precompiled regex
- */
-/*
+ *
  * (C) 2006 Jac Goudsmit added -o option
  */
 
+//applet:IF_GREP(APPLET(grep, _BB_DIR_BIN, _BB_SUID_DROP))
+//applet:IF_FEATURE_GREP_EGREP_ALIAS(APPLET_ODDNAME(egrep, grep, _BB_DIR_BIN, _BB_SUID_DROP, egrep))
+//applet:IF_FEATURE_GREP_FGREP_ALIAS(APPLET_ODDNAME(fgrep, grep, _BB_DIR_BIN, _BB_SUID_DROP, fgrep))
+
 //kbuild:lib-$(CONFIG_GREP) += grep.o
-//config:
+
 //config:config GREP
 //config:	bool "grep"
 //config:	default y
@@ -57,17 +60,67 @@
 #include "libbb.h"
 #include "xregex.h"
 
+
 /* options */
+//usage:#define grep_trivial_usage
+//usage:       "[-HhnlLoqvsriw"
+//usage:       "F"
+//usage:	IF_FEATURE_GREP_EGREP_ALIAS("E")
+//usage:	IF_EXTRA_COMPAT("z")
+//usage:       "] [-m N] "
+//usage:	IF_FEATURE_GREP_CONTEXT("[-A/B/C N] ")
+//usage:       "PATTERN/-e PATTERN.../-f FILE [FILE]..."
+//usage:#define grep_full_usage "\n\n"
+//usage:       "Search for PATTERN in FILEs (or stdin)\n"
+//usage:     "\nOptions:"
+//usage:     "\n	-H	Add 'filename:' prefix"
+//usage:     "\n	-h	Do not add 'filename:' prefix"
+//usage:     "\n	-n	Add 'line_no:' prefix"
+//usage:     "\n	-l	Show only names of files that match"
+//usage:     "\n	-L	Show only names of files that don't match"
+//usage:     "\n	-c	Show only count of matching lines"
+//usage:     "\n	-o	Show only the matching part of line"
+//usage:     "\n	-q	Quiet. Return 0 if PATTERN is found, 1 otherwise"
+//usage:     "\n	-v	Select non-matching lines"
+//usage:     "\n	-s	Suppress open and read errors"
+//usage:     "\n	-r	Recurse"
+//usage:     "\n	-i	Ignore case"
+//usage:     "\n	-w	Match whole words only"
+//usage:     "\n	-F	PATTERN is a literal (not regexp)"
+//usage:	IF_FEATURE_GREP_EGREP_ALIAS(
+//usage:     "\n	-E	PATTERN is an extended regexp"
+//usage:	)
+//usage:	IF_EXTRA_COMPAT(
+//usage:     "\n	-z	Input is NUL terminated"
+//usage:	)
+//usage:     "\n	-m N	Match up to N times per file"
+//usage:	IF_FEATURE_GREP_CONTEXT(
+//usage:     "\n	-A N	Print N lines of trailing context"
+//usage:     "\n	-B N	Print N lines of leading context"
+//usage:     "\n	-C N	Same as '-A N -B N'"
+//usage:	)
+//usage:     "\n	-e PTRN	Pattern to match"
+//usage:     "\n	-f FILE	Read pattern from file"
+//usage:
+//usage:#define grep_example_usage
+//usage:       "$ grep root /etc/passwd\n"
+//usage:       "root:x:0:0:root:/root:/bin/bash\n"
+//usage:       "$ grep ^[rR]oo. /etc/passwd\n"
+//usage:       "root:x:0:0:root:/root:/bin/bash\n"
+//usage:
+//usage:#define egrep_trivial_usage NOUSAGE_STR
+//usage:#define egrep_full_usage ""
+//usage:#define fgrep_trivial_usage NOUSAGE_STR
+//usage:#define fgrep_full_usage ""
+
 #define OPTSTR_GREP \
 	"lnqvscFiHhe:f:Lorm:w" \
 	IF_FEATURE_GREP_CONTEXT("A:B:C:") \
 	IF_FEATURE_GREP_EGREP_ALIAS("E") \
 	IF_EXTRA_COMPAT("z") \
 	"aI"
-
 /* ignored: -a "assume all files to be text" */
 /* ignored: -I "assume binary files have no matches" */
-
 enum {
 	OPTBIT_l, /* list matched file names only */
 	OPTBIT_n, /* print line# */