Make it possible to select "sh" and "bash" aliases without selecting ash or hush

The same can be done for msh, but we are probably better off just deleting it
in a next versio or two.

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

1 files changed, 24 insertions, 35 deletions

diff --git a/shell/hush.c b/shell/hush.c
index c582125..fecc892 100644
--- a/shell/hush.c
+++ b/shell/hush.c
@@ -99,7 +99,7 @@
 //config:config HUSH_BASH_COMPAT
 //config:	bool "bash-compatible extensions"
 //config:	default y
-//config:	depends on HUSH
+//config:	depends on HUSH || SH_IS_HUSH || BASH_IS_HUSH
 //config:	help
 //config:	  Enable bash-compatible extensions.
 //config:
@@ -113,14 +113,14 @@
 //config:config HUSH_HELP
 //config:	bool "help builtin"
 //config:	default y
-//config:	depends on HUSH
+//config:	depends on HUSH || SH_IS_HUSH || BASH_IS_HUSH
 //config:	help
 //config:	  Enable help builtin in hush. Code size + ~1 kbyte.
 //config:
 //config:config HUSH_INTERACTIVE
 //config:	bool "Interactive mode"
 //config:	default y
-//config:	depends on HUSH
+//config:	depends on HUSH || SH_IS_HUSH || BASH_IS_HUSH
 //config:	help
 //config:	  Enable interactive mode (prompt and command editing).
 //config:	  Without this, hush simply reads and executes commands
@@ -148,35 +148,35 @@
 //config:config HUSH_TICK
 //config:	bool "Process substitution"
 //config:	default y
-//config:	depends on HUSH
+//config:	depends on HUSH || SH_IS_HUSH || BASH_IS_HUSH
 //config:	help
 //config:	  Enable process substitution `command` and $(command) in hush.
 //config:
 //config:config HUSH_IF
 //config:	bool "Support if/then/elif/else/fi"
 //config:	default y
-//config:	depends on HUSH
+//config:	depends on HUSH || SH_IS_HUSH || BASH_IS_HUSH
 //config:	help
 //config:	  Enable if/then/elif/else/fi in hush.
 //config:
 //config:config HUSH_LOOPS
 //config:	bool "Support for, while and until loops"
 //config:	default y
-//config:	depends on HUSH
+//config:	depends on HUSH || SH_IS_HUSH || BASH_IS_HUSH
 //config:	help
 //config:	  Enable for, while and until loops in hush.
 //config:
 //config:config HUSH_CASE
 //config:	bool "Support case ... esac statement"
 //config:	default y
-//config:	depends on HUSH
+//config:	depends on HUSH || SH_IS_HUSH || BASH_IS_HUSH
 //config:	help
 //config:	  Enable case ... esac statement in hush. +400 bytes.
 //config:
 //config:config HUSH_FUNCTIONS
 //config:	bool "Support funcname() { commands; } syntax"
 //config:	default y
-//config:	depends on HUSH
+//config:	depends on HUSH || SH_IS_HUSH || BASH_IS_HUSH
 //config:	help
 //config:	  Enable support for shell functions in hush. +800 bytes.
 //config:
@@ -190,7 +190,7 @@
 //config:config HUSH_RANDOM_SUPPORT
 //config:	bool "Pseudorandom generator and $RANDOM variable"
 //config:	default y
-//config:	depends on HUSH
+//config:	depends on HUSH || SH_IS_HUSH || BASH_IS_HUSH
 //config:	help
 //config:	  Enable pseudorandom generator and dynamic variable "$RANDOM".
 //config:	  Each read of "$RANDOM" will generate a new pseudorandom value.
@@ -198,14 +198,14 @@
 //config:config HUSH_EXPORT_N
 //config:	bool "Support 'export -n' option"
 //config:	default y
-//config:	depends on HUSH
+//config:	depends on HUSH || SH_IS_HUSH || BASH_IS_HUSH
 //config:	help
 //config:	  export -n unexports variables. It is a bash extension.
 //config:
 //config:config HUSH_MODE_X
 //config:	bool "Support 'hush -x' option and 'set -x' command"
 //config:	default y
-//config:	depends on HUSH
+//config:	depends on HUSH || SH_IS_HUSH || BASH_IS_HUSH
 //config:	help
 //config:	  This instructs hush to print commands before execution.
 //config:	  Adds ~300 bytes.
@@ -216,14 +216,15 @@
 //config:	select HUSH
 //config:	help
 //config:	  msh is deprecated and will be removed, please migrate to hush.
-//config:
 
 //applet:IF_HUSH(APPLET(hush, BB_DIR_BIN, BB_SUID_DROP))
-//applet:IF_MSH(APPLET(msh, BB_DIR_BIN, BB_SUID_DROP))
-//applet:IF_FEATURE_SH_IS_HUSH(APPLET_ODDNAME(sh, hush, BB_DIR_BIN, BB_SUID_DROP, sh))
-//applet:IF_FEATURE_BASH_IS_HUSH(APPLET_ODDNAME(bash, hush, BB_DIR_BIN, BB_SUID_DROP, bash))
+//applet:IF_MSH(APPLET_ODDNAME(msh, hush, BB_DIR_BIN, BB_SUID_DROP, hush))
+//applet:IF_SH_IS_HUSH(APPLET_ODDNAME(sh, hush, BB_DIR_BIN, BB_SUID_DROP, hush))
+//applet:IF_BASH_IS_HUSH(APPLET_ODDNAME(bash, hush, BB_DIR_BIN, BB_SUID_DROP, hush))
 
 //kbuild:lib-$(CONFIG_HUSH) += hush.o match.o shell_common.o
+//kbuild:lib-$(CONFIG_SH_IS_HUSH) += hush.o match.o shell_common.o
+//kbuild:lib-$(CONFIG_BASH_IS_HUSH) += hush.o match.o shell_common.o
 //kbuild:lib-$(CONFIG_HUSH_RANDOM_SUPPORT) += random.o
 
 /* -i (interactive) and -s (read stdin) are also accepted,
@@ -236,18 +237,6 @@
 //usage:#define hush_full_usage "\n\n"
 //usage:	"Unix shell interpreter"
 
-//usage:#define msh_trivial_usage hush_trivial_usage
-//usage:#define msh_full_usage hush_full_usage
-
-//usage:#if ENABLE_FEATURE_SH_IS_HUSH
-//usage:# define sh_trivial_usage hush_trivial_usage
-//usage:# define sh_full_usage    hush_full_usage
-//usage:#endif
-//usage:#if ENABLE_FEATURE_BASH_IS_HUSH
-//usage:# define bash_trivial_usage hush_trivial_usage
-//usage:# define bash_full_usage    hush_full_usage
-//usage:#endif
-
 #if !(defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__NetBSD__) \
 	|| defined(__APPLE__) \
     )
@@ -4011,7 +4000,7 @@ static int i_peek_and_eat_bkslash_nl(struct in_str *input)
 	}
 }
 
-#if ENABLE_HUSH_TICK || ENABLE_SH_MATH_SUPPORT || ENABLE_HUSH_DOLLAR_OPS
+#if ENABLE_HUSH_TICK || ENABLE_FEATURE_SH_MATH || ENABLE_HUSH_DOLLAR_OPS
 /* Subroutines for copying $(...) and `...` things */
 static int add_till_backquote(o_string *dest, struct in_str *input, int in_dquote);
 /* '...' */
@@ -4179,7 +4168,7 @@ static int add_till_closing_bracket(o_string *dest, struct in_str *input, unsign
 	}
 	return ch;
 }
-#endif /* ENABLE_HUSH_TICK || ENABLE_SH_MATH_SUPPORT || ENABLE_HUSH_DOLLAR_OPS */
+#endif /* ENABLE_HUSH_TICK || ENABLE_FEATURE_SH_MATH || ENABLE_HUSH_DOLLAR_OPS */
 
 /* Return code: 0 for OK, 1 for syntax error */
 #if BB_MMU
@@ -4333,13 +4322,13 @@ static int parse_dollar(o_string *as_string,
 		o_addchr(dest, SPECIAL_VAR_SYMBOL);
 		break;
 	}
-#if ENABLE_SH_MATH_SUPPORT || ENABLE_HUSH_TICK
+#if ENABLE_FEATURE_SH_MATH || ENABLE_HUSH_TICK
 	case '(': {
 		unsigned pos;
 
 		ch = i_getch(input);
 		nommu_addchr(as_string, ch);
-# if ENABLE_SH_MATH_SUPPORT
+# if ENABLE_FEATURE_SH_MATH
 		if (i_peek_and_eat_bkslash_nl(input) == '(') {
 			ch = i_getch(input);
 			nommu_addchr(as_string, ch);
@@ -5217,7 +5206,7 @@ static char *encode_then_expand_string(const char *str, int process_bkslash, int
 	return exp_str;
 }
 
-#if ENABLE_SH_MATH_SUPPORT
+#if ENABLE_FEATURE_SH_MATH
 static arith_t expand_and_evaluate_arith(const char *arg, const char **errmsg_p)
 {
 	arith_state_t math_state;
@@ -5469,7 +5458,7 @@ static NOINLINE const char *expand_one_var(char **to_be_freed_pp, char *arg, cha
 		}
 #endif
 		else if (exp_op == ':') {
-#if ENABLE_HUSH_BASH_COMPAT && ENABLE_SH_MATH_SUPPORT
+#if ENABLE_HUSH_BASH_COMPAT && ENABLE_FEATURE_SH_MATH
 			/* It's ${var:N[:M]} bashism.
 			 * Note that in encoded form it has TWO parts:
 			 * var:N<SPECIAL_VAR_SYMBOL>M<SPECIAL_VAR_SYMBOL>
@@ -5604,7 +5593,7 @@ static NOINLINE int expand_vars_to_list(o_string *output, int n, char *arg)
 #if ENABLE_HUSH_TICK
 		o_string subst_result = NULL_O_STRING;
 #endif
-#if ENABLE_SH_MATH_SUPPORT
+#if ENABLE_FEATURE_SH_MATH
 		char arith_buf[sizeof(arith_t)*3 + 2];
 #endif
 
@@ -5698,7 +5687,7 @@ static NOINLINE int expand_vars_to_list(o_string *output, int n, char *arg)
 			val = subst_result.data;
 			goto store_val;
 #endif
-#if ENABLE_SH_MATH_SUPPORT
+#if ENABLE_FEATURE_SH_MATH
 		case '+': { /* <SPECIAL_VAR_SYMBOL>+cmd<SPECIAL_VAR_SYMBOL> */
 			arith_t res;