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authorDenis Vlasenko2007-11-23 21:20:21 +0000
committerDenis Vlasenko2007-11-23 21:20:21 +0000
commit5bc593ccb8502703bd09a7cdc5a036fc748aa91e (patch)
tree5a2e3508fc5803e6b0eb64d17ec6d2678fa36801 /shell
parentcccdc4e01abb354c50aa483a21d5ff56a18c0b4a (diff)
downloadbusybox-5bc593ccb8502703bd09a7cdc5a036fc748aa91e.zip
busybox-5bc593ccb8502703bd09a7cdc5a036fc748aa91e.tar.gz
hush: implement echo builtin
builtin_echo - 36 +36 bltins 384 396 +12 ------------------------------------------------------------------------------ (add/remove: 1/0 grow/shrink: 1/0 up/down: 48/0) Total: 48 bytes
Diffstat (limited to 'shell')
-rw-r--r--shell/Config.in1
-rw-r--r--shell/hush.c15
2 files changed, 16 insertions, 0 deletions
diff --git a/shell/Config.in b/shell/Config.in
index 0689b4e..312583e 100644
--- a/shell/Config.in
+++ b/shell/Config.in
@@ -166,6 +166,7 @@ config HUSH
select TRUE
select FALSE
select TEST
+ select ECHO
help
hush is a very small shell (just 18k) and it has fairly complete
Bourne shell grammar. It even handles all the normal flow control
diff --git a/shell/hush.c b/shell/hush.c
index 912cbb5..6bf4d1d 100644
--- a/shell/hush.c
+++ b/shell/hush.c
@@ -614,6 +614,7 @@ static void free_strings(char **strings)
/* Function prototypes for builtins */
static int builtin_cd(char **argv);
+static int builtin_echo(char **argv);
static int builtin_eval(char **argv);
static int builtin_exec(char **argv);
static int builtin_exit(char **argv);
@@ -652,6 +653,8 @@ struct built_in_command {
#endif
};
+/* For now, echo and test are unconditionally enabled.
+ * Maybe make it configurable? */
static const struct built_in_command bltins[] = {
BLTIN("[" , builtin_test, "Test condition"),
BLTIN("[[" , builtin_test, "Test condition"),
@@ -661,6 +664,7 @@ static const struct built_in_command bltins[] = {
// BLTIN("break" , builtin_not_written, "Exit for, while or until loop"),
BLTIN("cd" , builtin_cd, "Change working directory"),
// BLTIN("continue", builtin_not_written, "Continue for, while or until loop"),
+ BLTIN("echo" , builtin_echo, "Write strings to stdout"),
BLTIN("eval" , builtin_eval, "Construct and run shell command"),
BLTIN("exec" , builtin_exec, "Exec command, replacing this shell with the exec'd process"),
BLTIN("exit" , builtin_exit, "Exit from shell"),
@@ -841,6 +845,17 @@ static int builtin_test(char **argv)
return test_main(argc, argv - argc);
}
+/* built-in 'test' handler */
+static int builtin_echo(char **argv)
+{
+ int argc = 0;
+ while (*argv) {
+ argc++;
+ argv++;
+ }
+ return bb_echo(argc, argv - argc);
+}
+
/* built-in 'eval' handler */
static int builtin_eval(char **argv)
{