af18b301e
Aaro Koskinen
2019-09-12
Subject
find: implement -empty
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Commit Diff GitHub →
findutils/find.c+44 -0
| @@ -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; | |