find: add optional support for -links. +100 bytes

Signed-off-by: Matheus Izvekov <mizvekov@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

diff --git a/findutils/Config.in b/findutils/Config.in
index f274ad1..8582d64 100644 (file)
--- a/findutils/Config.in
+++ b/findutils/Config.in
@@ -171,6 +171,13 @@ config FEATURE_FIND_CONTEXT
        help
          Support the 'find -context' option for matching security context.
 
+config FEATURE_FIND_LINKS
+       bool "Enable -links: link count matching"
+       default n
+       depends on FIND
+       help
+         Support the 'find -links' option for matching number of links.
+
 config GREP
        bool "grep"
        default n

diff --git a/findutils/find.c b/findutils/find.c
index 1b24668..f0c2598 100644 (file)
--- a/findutils/find.c
+++ b/findutils/find.c
@@ -96,6 +96,7 @@ IF_FEATURE_FIND_PRUNE(  ACTS(prune))
 IF_FEATURE_FIND_DELETE( ACTS(delete))
 IF_FEATURE_FIND_EXEC(   ACTS(exec,  char **exec_argv; unsigned *subst_count; int exec_argc;))
 IF_FEATURE_FIND_GROUP(  ACTS(group, gid_t gid;))
+IF_FEATURE_FIND_LINKS(  ACTS(links, char links_char; int links_count;))
 
 struct globals {
        IF_FEATURE_FIND_XDEV(dev_t *xdev_dev;)
@@ -175,7 +176,7 @@ static int exec_actions(action ***appp, const char *fileName, const struct stat
         * On return, bit is restored.  */
 
        cur_group = -1;
-       while ((app = appp[++cur_group])) {
+       while ((app = appp[++cur_group]) != NULL) {
                rc &= ~TRUE; /* 'success' so far, clear TRUE bit */
                cur_action = -1;
                while (1) {
@@ -390,7 +391,16 @@ ACTF(context)
        return rc == 0;
 }
 #endif
-
+#if ENABLE_FEATURE_FIND_LINKS
+ACTF(links)
+{
+       switch(ap->links_char) {
+       case '-' : return (statbuf->st_nlink <  ap->links_count);
+       case '+' : return (statbuf->st_nlink >  ap->links_count);
+       default:   return (statbuf->st_nlink == ap->links_count);
+       }
+}
+#endif
 
 static int FAST_FUNC fileAction(const char *fileName,
                struct stat *statbuf,
@@ -463,7 +473,7 @@ static int find_type(const char *type)
 
 #if ENABLE_FEATURE_FIND_PERM \
  || ENABLE_FEATURE_FIND_MTIME || ENABLE_FEATURE_FIND_MMIN \
- || ENABLE_FEATURE_FIND_SIZE
+ || ENABLE_FEATURE_FIND_SIZE  || ENABLE_FEATURE_FIND_LINKS
 static const char* plus_minus_num(const char* str)
 {
        if (*str == '-' || *str == '+')
@@ -505,6 +515,7 @@ static action*** parse_params(char **argv)
        IF_FEATURE_FIND_GROUP(  PARM_group     ,)
        IF_FEATURE_FIND_SIZE(   PARM_size      ,)
        IF_FEATURE_FIND_CONTEXT(PARM_context   ,)
+       IF_FEATURE_FIND_LINKS(  PARM_links     ,)
        };
 
        static const char params[] ALIGN1 =
@@ -538,6 +549,7 @@ static action*** parse_params(char **argv)
        IF_FEATURE_FIND_GROUP(  "-group\0"  )
        IF_FEATURE_FIND_SIZE(   "-size\0"   )
        IF_FEATURE_FIND_CONTEXT("-context\0")
+       IF_FEATURE_FIND_LINKS(  "-links\0"  )
                                 ;
 
        action*** appp;
@@ -823,6 +835,14 @@ static action*** parse_params(char **argv)
                                bb_simple_perror_msg(arg1);
                }
 #endif
+#if ENABLE_FEATURE_FIND_LINKS
+               else if (parm == PARM_links) {
+                       action_links *ap;
+                       ap = ALLOC_ACTION(links);
+                       ap->links_char = arg1[0];
+                       ap->links_count = xatoul(plus_minus_num(arg1));
+               }
+#endif
                else {
                        bb_error_msg("unrecognized: %s", arg);
                        bb_show_usage();

diff --git a/include/usage.h b/include/usage.h
index eab57d8..4254e15 100644 (file)
--- a/include/usage.h
+++ b/include/usage.h
@@ -1232,13 +1232,13 @@
      "\n       -type X         File type is X (X is one of: f,d,l,b,c,...)") \
        IF_FEATURE_FIND_PERM( \
      "\n       -perm NNN       Permissions match any of (+NNN), all of (-NNN)," \
-     "\n                       or exactly (NNN)") \
+     "\n                       or exactly NNN") \
        IF_FEATURE_FIND_MTIME( \
      "\n       -mtime DAYS     Modified time is greater than (+N), less than (-N)," \
-     "\n                       or exactly (N) days") \
+     "\n                       or exactly N days") \
        IF_FEATURE_FIND_MMIN( \
      "\n       -mmin MINS      Modified time is greater than (+N), less than (-N)," \
-     "\n                       or exactly (N) minutes") \
+     "\n                       or exactly N minutes") \
        IF_FEATURE_FIND_NEWER( \
      "\n       -newer FILE     Modified time is more recent than FILE's") \
        IF_FEATURE_FIND_INUM( \
@@ -1252,6 +1252,9 @@
        IF_FEATURE_FIND_SIZE( \
      "\n       -size N[bck]    File size is N (c:bytes,k:kbytes,b:512 bytes(def.))." \
      "\n                       +/-N: file size is bigger/smaller than N") \
+       IF_FEATURE_FIND_LINKS( \
+     "\n       -links N        Number of links is greater than (+N), less than (-N)," \
+     "\n                       or exactly N") \
      "\n       -print          Print (default and assumed)" \
        IF_FEATURE_FIND_PRINT0( \
      "\n       -print0         Delimit output with null characters rather than" \