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[paraslash.git] / fd.c

diff --git a/fd.c b/fd.c
index d858ae623ba6203719e70930625df97867166e67..1af902f9af440cbf570377ed219eea08e76417a2 100644 (file)
--- a/fd.c
+++ b/fd.c
@@ -387,71 +387,32 @@ int para_open(const char *path, int flags, mode_t mode)
 }
 
 /**
- * Save the cwd and open a given directory.
+ * Create a directory, don't fail if it already exists.
  *
- * \param dirname Path to the directory to open.
- * \param dir Result pointer.
- * \param cwd File descriptor of the current working directory.
- *
- * \return Standard.
- *
- * Opening the current directory (".") and calling fchdir() to return is
- * usually faster and more reliable than saving cwd in some buffer and calling
- * chdir() afterwards.
- *
- * If \a cwd is not \p NULL "." is opened and the resulting file descriptor is
- * stored in \a cwd. If the function returns success, and \a cwd is not \p
- * NULL, the caller must close this file descriptor (probably after calling
- * fchdir(*cwd)).
- *
- * On errors, the function undos everything, so the caller needs neither close
- * any files, nor change back to the original working directory.
+ * \param path Name of the directory to create.
  *
- * \sa getcwd(3).
+ * This function passes the fixed mode value 0777 to mkdir(3) (which consults
+ * the file creation mask and restricts this value).
  *
+ * \return Zero if the path already existed as a directory or as a symbolic
+ * link which leads to a directory, one if the path did not exist and the
+ * directory has been created successfully, negative error code else.
  */
-static int para_opendir(const char *dirname, DIR **dir, int *cwd)
+int para_mkdir(const char *path)
 {
-       int ret;
+       /*
+        * We call opendir(3) rather than relying on stat(2) because this way
+        * we don't need extra code to get the symlink case right.
+        */
+       DIR *dir = opendir(path);
 
-       *dir = NULL;
-       if (cwd) {
-               ret = para_open(".", O_RDONLY, 0);
-               if (ret < 0)
-                       return ret;
-               *cwd = ret;
-       }
-       if (chdir(dirname) != 0) {
-               ret = -ERRNO_TO_PARA_ERROR(errno);
-               goto close_cwd;
-       }
-       *dir = opendir(".");
-       if (*dir)
-               return 1;
-       ret = -ERRNO_TO_PARA_ERROR(errno);
-       /* Ignore return value of fchdir() and close(). We're busted anyway. */
-       if (cwd) {
-               int __a_unused ret2 = fchdir(*cwd); /* STFU, gcc */
+       if (dir) {
+               closedir(dir);
+               return 0;
        }
-close_cwd:
-       if (cwd)
-               close(*cwd);
-       return ret;
-}
-
-/**
- * A wrapper for mkdir(2).
- *
- * \param path Name of the directory to create.
- * \param mode The permissions to use.
- *
- * \return Standard.
- */
-int para_mkdir(const char *path, mode_t mode)
-{
-       if (!mkdir(path, mode))
-               return 1;
-       return -ERRNO_TO_PARA_ERROR(errno);
+       if (errno != ENOENT)
+               return -ERRNO_TO_PARA_ERROR(errno);
+       return mkdir(path, 0777) == 0? 1 : -ERRNO_TO_PARA_ERROR(errno);
 }
 
 /**
@@ -617,64 +578,3 @@ 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, 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);
-       if (fchdir(cwd_fd) < 0 && ret >= 0)
-               ret = -ERRNO_TO_PARA_ERROR(errno);
-       close(cwd_fd);
-       return ret;
-}