Make grep/egrep/fgrep independently selectable

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

findutils/grep.c

@@ -18,45 +18,41 @@
  * (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 GREP
 //config:	bool "grep"
 //config:	default y
 //config:	help
 //config:	  grep is used to search files for a specified pattern.
 //config:
-//config:config FEATURE_GREP_EGREP_ALIAS
+//config:config EGREP
-//config:	bool "Enable extended regular expressions (egrep & grep -E)"
+//config:	bool "egrep"
 //config:	default y
-//config:	depends on GREP
 //config:	help
-//config:	  Enabled support for extended regular expressions. Extended
+//config:	  Alias to "grep -E"
-//config:	  regular expressions allow for alternation (foo|bar), grouping,
-//config:	  and various repetition operators.
 //config:
-//config:config FEATURE_GREP_FGREP_ALIAS
+//config:config FGREP
-//config:	bool "Alias fgrep to grep -F"
+//config:	bool "fgrep"
 //config:	default y
-//config:	depends on GREP
 //config:	help
-//config:	  fgrep sees the search pattern as a normal string rather than
+//config:	  Alias to "grep -F"
-//config:	  regular expressions.
-//config:	  grep -F always works, this just creates the fgrep alias.
 //config:
 //config:config FEATURE_GREP_CONTEXT
 //config:	bool "Enable before and after context flags (-A, -B and -C)"
 //config:	default y
-//config:	depends on GREP
+//config:	depends on GREP || EGREP
 //config:	help
 //config:	  Print the specified number of leading (-B) and/or trailing (-A)
 //config:	  context surrounding our matching lines.
 //config:	  Print the specified number of context lines (-C).
 
+//applet:IF_GREP(APPLET(grep, BB_DIR_BIN, BB_SUID_DROP))
+//applet:IF_EGREP(APPLET_ODDNAME(egrep, grep, BB_DIR_BIN, BB_SUID_DROP, egrep))
+//applet:IF_FGREP(APPLET_ODDNAME(fgrep, grep, BB_DIR_BIN, BB_SUID_DROP, fgrep))
+
+//kbuild:lib-$(CONFIG_GREP) += grep.o
+//kbuild:lib-$(CONFIG_EGREP) += grep.o
+//kbuild:lib-$(CONFIG_FGREP) += grep.o
+
 #include "libbb.h"
 #include "common_bufsiz.h"
 #include "xregex.h"
@@ -64,9 +60,7 @@
 
 /* options */
 //usage:#define grep_trivial_usage
-//usage:       "[-HhnlLoqvsriw"
+//usage:       "[-HhnlLoqvsriwFE"
-//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] ")
@@ -88,9 +82,7 @@
 //usage:     "\n	-w	Match whole words only"
 //usage:     "\n	-x	Match whole lines 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:	)
@@ -117,7 +109,7 @@
 #define OPTSTR_GREP \
 	"lnqvscFiHhe:*f:*Lorm:+wx" \
 	IF_FEATURE_GREP_CONTEXT("A:+B:+C:+") \
-	IF_FEATURE_GREP_EGREP_ALIAS("E") \
+	"E" \
 	IF_EXTRA_COMPAT("z") \
 	"aI"
 /* ignored: -a "assume all files to be text" */
@@ -144,7 +136,7 @@ enum {
 	IF_FEATURE_GREP_CONTEXT(    OPTBIT_A ,) /* -A NUM: after-match context */
 	IF_FEATURE_GREP_CONTEXT(    OPTBIT_B ,) /* -B NUM: before-match context */
 	IF_FEATURE_GREP_CONTEXT(    OPTBIT_C ,) /* -C NUM: -A and -B combined */
-	IF_FEATURE_GREP_EGREP_ALIAS(OPTBIT_E ,) /* extended regexp */
+	OPTBIT_E, /* extended regexp */
 	IF_EXTRA_COMPAT(            OPTBIT_z ,) /* input is NUL terminated */
 	OPT_l = 1 << OPTBIT_l,
 	OPT_n = 1 << OPTBIT_n,
@@ -167,7 +159,7 @@ enum {
 	OPT_A = IF_FEATURE_GREP_CONTEXT(    (1 << OPTBIT_A)) + 0,
 	OPT_B = IF_FEATURE_GREP_CONTEXT(    (1 << OPTBIT_B)) + 0,
 	OPT_C = IF_FEATURE_GREP_CONTEXT(    (1 << OPTBIT_C)) + 0,
-	OPT_E = IF_FEATURE_GREP_EGREP_ALIAS((1 << OPTBIT_E)) + 0,
+	OPT_E = 1 << OPTBIT_E,
 	OPT_z = IF_EXTRA_COMPAT(            (1 << OPTBIT_z)) + 0,
 };
 
@@ -744,7 +736,7 @@ int grep_main(int argc UNUSED_PARAM, char **argv)
 		}
 	}
 
-	if (ENABLE_FEATURE_GREP_FGREP_ALIAS && applet_name[0] == 'f')
+	if (ENABLE_FGREP && applet_name[0] == 'f')
 		option_mask32 |= OPT_F;
 
 #if !ENABLE_EXTRA_COMPAT
@@ -752,8 +744,8 @@ int grep_main(int argc UNUSED_PARAM, char **argv)
 		reflags = REG_NOSUB;
 #endif
 
-	if (ENABLE_FEATURE_GREP_EGREP_ALIAS
+	if ((ENABLE_EGREP && applet_name[0] == 'e')
-	 && (applet_name[0] == 'e' || (option_mask32 & OPT_E))
+	 || (option_mask32 & OPT_E)
 	) {
 		reflags |= REG_EXTENDED;
 	}

testsuite/grep.tests

@@ -96,7 +96,7 @@ testing "grep -x -F (partial match 1)" "grep -x -F foo input ; echo \$?" \
 testing "grep -x -F (partial match 2)" "grep -x -F foo input ; echo \$?" \
 	"1\n" "bar foo\n" ""
 
-optional FEATURE_GREP_EGREP_ALIAS
+optional EGREP
 testing "grep -E supports extended regexps" "grep -E fo+" "foo\n" "" \
 	"b\ar\nfoo\nbaz"
 testing "grep is also egrep" "egrep foo" "foo\n" "" "foo\nbar\n"