First draft of the libosl patch series.

[paraslash.git] / fd.c

diff --git a/fd.c b/fd.c
index 8759d5099200c4f6c1b6c31e84b66da3372b5540..1c67f22bb284ab11ffda80bb90c0693661b0328c 100644 (file)
--- a/fd.c
+++ b/fd.c
@@ -14,7 +14,7 @@
 
 #include "para.h"
 #include "error.h"
-
+#include "string.h"
 /**
  * Write a buffer to a file descriptor, re-write on short writes.
  *
@@ -480,3 +480,65 @@ void valid_fd_012(void)
                }
        }
 }
+
+/**
+ * Traverse the given directory recursively.
+ *
+ * \param dirname The directory to traverse.
+ * \param func The function to call for each entry.
+ * \param private_data Pointer to an arbitrary data structure.
+ *
+ * For each regular file under \a dirname, the supplied function \a func is
+ * called.  The full path of the regular file and the \a private_data pointer
+ * are passed to \a func. Directories for which the calling process has no
+ * permissions to change to are silently ignored.
+ *
+ * \return Standard.
+ */
+int for_each_file_in_dir(const char *dirname,
+               int (*func)(const char *, void *), void *private_data)
+{
+       DIR *dir;
+       struct dirent *entry;
+       int cwd_fd, ret2, ret = para_opendir(dirname, &dir, &cwd_fd);
+
+       if (ret < 0)
+               return ret == -ERRNO_TO_PARA_ERROR(EACCES)? 1 : ret;
+       /* scan cwd recursively */
+       while ((entry = readdir(dir))) {
+               mode_t m;
+               char *tmp;
+               struct stat s;
+
+               if (!strcmp(entry->d_name, "."))
+                       continue;
+               if (!strcmp(entry->d_name, ".."))
+                       continue;
+               if (lstat(entry->d_name, &s) == -1)
+                       continue;
+               m = s.st_mode;
+               if (!S_ISREG(m) && !S_ISDIR(m))
+                       continue;
+               tmp = make_message("%s/%s", dirname, entry->d_name);
+               if (!S_ISDIR(m)) {
+                       ret = func(tmp, private_data);
+                       free(tmp);
+                       if (ret < 0)
+                               goto out;
+                       continue;
+               }
+               /* directory */
+               ret = for_each_file_in_dir(tmp, func, private_data);
+               free(tmp);
+               if (ret < 0)
+                       goto out;
+       }
+       ret = 1;
+out:
+       closedir(dir);
+       ret2 = para_fchdir(cwd_fd);
+       if (ret2 < 0 && ret >= 0)
+               ret = ret2;
+       close(cwd_fd);
+       return ret;
+}