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authorDenis Vlasenko2008-06-14 15:50:55 +0000
committerDenis Vlasenko2008-06-14 15:50:55 +0000
commitdd316dd283704b9adb588c3fb7cdec6ba5fbceb8 (patch)
tree7e5a4f524e01190d04bc79a4814c4ff6dce9d40d
parenta84420062a1e7a6e149b7d1ca77e1a787e55d45b (diff)
downloadbusybox-dd316dd283704b9adb588c3fb7cdec6ba5fbceb8.zip
busybox-dd316dd283704b9adb588c3fb7cdec6ba5fbceb8.tar.gz
hush: add support for ':'; create testsuite entries
text data bss dec hex filename 809569 612 7044 817225 c7849 busybox_old 809528 612 7044 817184 c7820 busybox_unstripped
-rwxr-xr-xscripts/trylink14
-rw-r--r--shell/hush.c36
-rw-r--r--shell/hush_test/hush-bugs/glob_and_assign.right2
-rwxr-xr-x[-rw-r--r--]shell/hush_test/hush-bugs/glob_and_assign.tests (renamed from shell/hush_test/zbad2)3
-rw-r--r--shell/hush_test/hush-bugs/glob_and_vars.right1
-rwxr-xr-xshell/hush_test/hush-bugs/glob_and_vars.tests2
-rw-r--r--shell/hush_test/hush-bugs/while_in_subshell.right1
-rwxr-xr-xshell/hush_test/hush-bugs/while_in_subshell.tests2
-rw-r--r--shell/hush_test/hush-misc/colon.right2
-rwxr-xr-xshell/hush_test/hush-misc/colon.tests6
-rw-r--r--shell/hush_test/zbad3
11 files changed, 47 insertions, 25 deletions
diff --git a/scripts/trylink b/scripts/trylink
index c24d49d..adc045a 100755
--- a/scripts/trylink
+++ b/scripts/trylink
@@ -126,11 +126,12 @@ try $CC $CFLAGS $LDFLAGS \
while test "$LDLIBS"; do
$debug && echo "Trying libraries: $LDLIBS"
all_needed=true
+ last_needed=false
for one in $LDLIBS; do
without_one=`echo " $LDLIBS " | sed "s/ $one / /g" | xargs`
# "lib1 lib2 lib3" -> "-llib1 -llib2 -llib3"
l_list=`echo "$without_one" | sed -e 's/ / -l/g' -e 's/^/-l/' -e 's/^-l$//'`
- test "x$l_list" != "x" && l_list="-Wl,--start-group $l_list -Wl,--end-group"
+ test x"$l_list" != x"" && l_list="-Wl,--start-group $l_list -Wl,--end-group"
$debug && echo "Trying -l options: '$l_list'"
try $CC $CFLAGS $LDFLAGS \
-o $EXE \
@@ -143,16 +144,19 @@ while test "$LDLIBS"; do
echo " Library $one is not needed"
LDLIBS="$without_one"
all_needed=false
+ last_needed=false
else
echo " Library $one is needed"
+ last_needed=true
fi
done
# All libs were needed, can't remove any
$all_needed && break
- # If there is no space char, the list has just one lib.
- # I'm not sure that in this case lib really is 100% needed.
- # Let's try linking without it anyway... thus commented out.
- #{ echo "$LDLIBS" | grep -q ' '; } || break
+ # Optimization: was the last tried lib needed?
+ if $last_needed; then
+ # Was it the only one lib left? Don't test again then.
+ { echo "$LDLIBS" | grep -q ' '; } || break
+ fi
done
# Make the binary with final, minimal list of libs
diff --git a/shell/hush.c b/shell/hush.c
index 222fd9f..a84bb92 100644
--- a/shell/hush.c
+++ b/shell/hush.c
@@ -615,6 +615,7 @@ static int builtin_help(char **argv);
static int builtin_pwd(char **argv);
static int builtin_read(char **argv);
static int builtin_test(char **argv);
+static int builtin_true(char **argv);
static int builtin_set(char **argv);
static int builtin_shift(char **argv);
static int builtin_source(char **argv);
@@ -629,10 +630,10 @@ static int builtin_unset(char **argv);
* For example, 'unset foo | whatever' will parse and run, but foo will
* still be set at the end. */
struct built_in_command {
- const char *cmd; /* name */
- int (*function) (char **argv); /* function ptr */
+ const char *cmd;
+ int (*function)(char **argv);
#if ENABLE_HUSH_HELP
- const char *descr; /* description */
+ const char *descr;
#define BLTIN(cmd, func, help) { cmd, func, help }
#else
#define BLTIN(cmd, func, help) { cmd, func }
@@ -642,24 +643,25 @@ struct built_in_command {
/* For now, echo and test are unconditionally enabled.
* Maybe make it configurable? */
static const struct built_in_command bltins[] = {
+ BLTIN("." , builtin_source, "Run commands in a file"),
+ BLTIN(":" , builtin_true, "No-op"),
BLTIN("[" , builtin_test, "Test condition"),
BLTIN("[[" , builtin_test, "Test condition"),
#if ENABLE_HUSH_JOB
BLTIN("bg" , builtin_fg_bg, "Resume a job in the background"),
#endif
// BLTIN("break" , builtin_not_written, "Exit for, while or until loop"),
- BLTIN("cd" , builtin_cd, "Change working directory"),
+ BLTIN("cd" , builtin_cd, "Change 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"),
+ BLTIN("exec" , builtin_exec, "Execute command, don't return to shell"),
+ BLTIN("exit" , builtin_exit, "Exit"),
BLTIN("export", builtin_export, "Set environment variable"),
#if ENABLE_HUSH_JOB
BLTIN("fg" , builtin_fg_bg, "Bring job into the foreground"),
- BLTIN("jobs" , builtin_jobs, "Lists the active jobs"),
+ BLTIN("jobs" , builtin_jobs, "List active jobs"),
#endif
-// TODO: remove pwd? we have it as an applet...
BLTIN("pwd" , builtin_pwd, "Print current directory"),
BLTIN("read" , builtin_read, "Input environment variable"),
// BLTIN("return", builtin_not_written, "Return from a function"),
@@ -667,14 +669,12 @@ static const struct built_in_command bltins[] = {
BLTIN("shift" , builtin_shift, "Shift positional parameters"),
// BLTIN("trap" , builtin_not_written, "Trap signals"),
BLTIN("test" , builtin_test, "Test condition"),
-// BLTIN("ulimit", builtin_not_written, "Controls resource limits"),
- BLTIN("umask" , builtin_umask, "Sets file creation mask"),
+// BLTIN("ulimit", builtin_not_written, "Control resource limits"),
+ BLTIN("umask" , builtin_umask, "Set file creation mask"),
BLTIN("unset" , builtin_unset, "Unset environment variable"),
- BLTIN("." , builtin_source, "Source-in and run commands in a file"),
#if ENABLE_HUSH_HELP
BLTIN("help" , builtin_help, "List shell built-in commands"),
#endif
- BLTIN(NULL, NULL, NULL)
};
/* Signals are grouped, we handle them in batches */
@@ -810,6 +810,12 @@ static const char *set_cwd(void)
}
+/* built-in 'true' handler */
+static int builtin_true(char **argv ATTRIBUTE_UNUSED)
+{
+ return 0;
+}
+
/* built-in 'test' handler */
static int builtin_test(char **argv)
{
@@ -1005,7 +1011,7 @@ static int builtin_help(char **argv ATTRIBUTE_UNUSED)
printf("\nBuilt-in commands:\n");
printf("-------------------\n");
- for (x = bltins; x->cmd; x++) {
+ for (x = bltins; x != &bltins[ARRAY_SIZE(bltins)]; x++) {
printf("%s\t%s\n", x->cmd, x->descr);
}
printf("\n\n");
@@ -1583,7 +1589,7 @@ static void pseudo_exec_argv(char **ptrs2free, char **argv)
* easier to waste a few CPU cycles than it is to figure out
* if this is one of those cases.
*/
- for (x = bltins; x->cmd; x++) {
+ for (x = bltins; x != &bltins[ARRAY_SIZE(bltins)]; x++) {
if (strcmp(argv[0], x->cmd) == 0) {
debug_printf_exec("running builtin '%s'\n", argv[0]);
rcode = x->function(argv);
@@ -1965,7 +1971,7 @@ static int run_pipe(struct pipe *pi)
p = expand_string_to_string(argv[i]);
putenv(p);
}
- for (x = bltins; x->cmd; x++) {
+ for (x = bltins; x != &bltins[ARRAY_SIZE(bltins)]; x++) {
if (strcmp(argv[i], x->cmd) == 0) {
if (x->function == builtin_exec && argv[i+1] == NULL) {
debug_printf("magic exec\n");
diff --git a/shell/hush_test/hush-bugs/glob_and_assign.right b/shell/hush_test/hush-bugs/glob_and_assign.right
new file mode 100644
index 0000000..dae8323
--- /dev/null
+++ b/shell/hush_test/hush-bugs/glob_and_assign.right
@@ -0,0 +1,2 @@
+ZVAR=z.map
+*.map
diff --git a/shell/hush_test/zbad2 b/shell/hush_test/hush-bugs/glob_and_assign.tests
index b6fffe5..ea11e36 100644..100755
--- a/shell/hush_test/zbad2
+++ b/shell/hush_test/hush-bugs/glob_and_assign.tests
@@ -1,5 +1,3 @@
-## TODO: fix and add to testsuite
-
## # bash zbad2
## ZVAR=z.map
## *.map
@@ -17,3 +15,4 @@
ZVAR=*.map /bin/echo ZVAR=*.map
ZVAR=*.map
echo "$ZVAR"
+rm ZVAR=z.map
diff --git a/shell/hush_test/hush-bugs/glob_and_vars.right b/shell/hush_test/hush-bugs/glob_and_vars.right
new file mode 100644
index 0000000..3ac7ec5
--- /dev/null
+++ b/shell/hush_test/hush-bugs/glob_and_vars.right
@@ -0,0 +1 @@
+./glob_and_vars.right ./glob_and_vars.tests
diff --git a/shell/hush_test/hush-bugs/glob_and_vars.tests b/shell/hush_test/hush-bugs/glob_and_vars.tests
new file mode 100755
index 0000000..c8e0c06
--- /dev/null
+++ b/shell/hush_test/hush-bugs/glob_and_vars.tests
@@ -0,0 +1,2 @@
+v=.
+echo $v/glob_and_vars.*
diff --git a/shell/hush_test/hush-bugs/while_in_subshell.right b/shell/hush_test/hush-bugs/while_in_subshell.right
new file mode 100644
index 0000000..290d39b
--- /dev/null
+++ b/shell/hush_test/hush-bugs/while_in_subshell.right
@@ -0,0 +1 @@
+OK: 0
diff --git a/shell/hush_test/hush-bugs/while_in_subshell.tests b/shell/hush_test/hush-bugs/while_in_subshell.tests
new file mode 100755
index 0000000..def8e09
--- /dev/null
+++ b/shell/hush_test/hush-bugs/while_in_subshell.tests
@@ -0,0 +1,2 @@
+(while true; do exit; done)
+echo OK: $?
diff --git a/shell/hush_test/hush-misc/colon.right b/shell/hush_test/hush-misc/colon.right
new file mode 100644
index 0000000..2a87d02
--- /dev/null
+++ b/shell/hush_test/hush-misc/colon.right
@@ -0,0 +1,2 @@
+0
+OK: 0
diff --git a/shell/hush_test/hush-misc/colon.tests b/shell/hush_test/hush-misc/colon.tests
new file mode 100755
index 0000000..ea3b4d5
--- /dev/null
+++ b/shell/hush_test/hush-misc/colon.tests
@@ -0,0 +1,6 @@
+false
+:
+echo $?
+# Extra ; after done is due to a bug
+(while :; do exit; done;)
+echo OK: $?
diff --git a/shell/hush_test/zbad b/shell/hush_test/zbad
deleted file mode 100644
index e4b5caa..0000000
--- a/shell/hush_test/zbad
+++ /dev/null
@@ -1,3 +0,0 @@
-# TODO: hush doesn't know ':' null command
-
-while :; do exit; done