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authorAaro Koskinen <aaro.koskinen@iki.fi>2019-09-12 12:04:13 +0200
committerDenys Vlasenko <vda.linux@googlemail.com>2019-09-12 12:04:34 +0200
commitaf18b301eb16eb8496b31e5386b4c21c9045a5e6 (patch)
tree101c897b3462c117dc979f625ea46caa0fe3c0ae
parentd327c6b190900dcb0cb7cda9008eb4f9893a92d8 (diff)
downloadbusybox-af18b301eb16eb8496b31e5386b4c21c9045a5e6.tar.gz
find: implement -empty
function old new delta func_empty - 121 +121 packed_usage 33154 33167 +13 parse_params 1490 1500 +10 static.params 228 235 +7 ------------------------------------------------------------------------------ (add/remove: 1/0 grow/shrink: 3/0 up/down: 151/0) Total: 151 bytes Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
-rw-r--r--findutils/find.c44
1 files changed, 44 insertions, 0 deletions
diff --git a/findutils/find.c b/findutils/find.c
index d6679bd08..9a2c61b75 100644
--- a/findutils/find.c
+++ b/findutils/find.c
@@ -203,6 +203,14 @@
//config: WARNING: This option can do much harm if used wrong. Busybox will not
//config: try to protect the user from doing stupid things. Use with care.
//config:
+//config:config FEATURE_FIND_EMPTY
+//config: bool "Enable -empty: match empty files or directories"
+//config: default y
+//config: depends on FIND
+//config: help
+//config: Support the 'find -empty' option to find empty regular files
+//config: or directories.
+//config:
//config:config FEATURE_FIND_PATH
//config: bool "Enable -path: match pathname with shell pattern"
//config: default y
@@ -315,6 +323,9 @@
//usage: IF_FEATURE_FIND_CONTEXT(
//usage: "\n -context CTX File has specified security context"
//usage: )
+//usage: IF_FEATURE_FIND_EMPTY(
+//usage: "\n -empty Match empty file/directory"
+//usage: )
//usage: IF_FEATURE_FIND_PRUNE(
//usage: "\n -prune If current file is directory, don't descend into it"
//usage: )
@@ -396,6 +407,7 @@ IF_FEATURE_FIND_PAREN( ACTS(paren, action ***subexpr;))
IF_FEATURE_FIND_PRUNE( ACTS(prune))
IF_FEATURE_FIND_QUIT( ACTS(quit))
IF_FEATURE_FIND_DELETE( ACTS(delete))
+IF_FEATURE_FIND_EMPTY( ACTS(empty))
IF_FEATURE_FIND_EXEC( ACTS(exec,
char **exec_argv; /* -exec ARGS */
unsigned *subst_count;
@@ -824,6 +836,30 @@ ACTF(delete)
return TRUE;
}
#endif
+#if ENABLE_FEATURE_FIND_EMPTY
+ACTF(empty)
+{
+ if (S_ISDIR(statbuf->st_mode)) {
+ DIR *dir;
+ struct dirent *dent;
+
+ dir = opendir(fileName);
+ if (!dir) {
+ bb_simple_perror_msg(fileName);
+ return FALSE;
+ }
+
+ while ((dent = readdir(dir)) != NULL
+ && DOT_OR_DOTDOT(dent->d_name)
+ ) {
+ continue;
+ }
+ closedir(dir);
+ return dent == NULL;
+ }
+ return S_ISREG(statbuf->st_mode) && statbuf->st_size == 0;
+}
+#endif
#if ENABLE_FEATURE_FIND_CONTEXT
ACTF(context)
{
@@ -989,6 +1025,7 @@ static action*** parse_params(char **argv)
IF_FEATURE_FIND_PRUNE( PARM_prune ,)
IF_FEATURE_FIND_QUIT( PARM_quit ,)
IF_FEATURE_FIND_DELETE( PARM_delete ,)
+ IF_FEATURE_FIND_EMPTY( PARM_empty ,)
IF_FEATURE_FIND_EXEC( PARM_exec ,)
IF_FEATURE_FIND_EXECUTABLE(PARM_executable,)
IF_FEATURE_FIND_PAREN( PARM_char_brace,)
@@ -1034,6 +1071,7 @@ static action*** parse_params(char **argv)
IF_FEATURE_FIND_PRUNE( "-prune\0" )
IF_FEATURE_FIND_QUIT( "-quit\0" )
IF_FEATURE_FIND_DELETE( "-delete\0" )
+ IF_FEATURE_FIND_EMPTY( "-empty\0" )
IF_FEATURE_FIND_EXEC( "-exec\0" )
IF_FEATURE_FIND_EXECUTABLE("-executable\0")
IF_FEATURE_FIND_PAREN( "(\0" )
@@ -1203,6 +1241,12 @@ static action*** parse_params(char **argv)
(void) ALLOC_ACTION(delete);
}
#endif
+#if ENABLE_FEATURE_FIND_EMPTY
+ else if (parm == PARM_empty) {
+ dbg("%d", __LINE__);
+ (void) ALLOC_ACTION(empty);
+ }
+#endif
#if ENABLE_FEATURE_FIND_EXEC
else if (parm == PARM_exec) {
int i;