Implement afs events.

[paraslash.git] / fd.c

diff --git a/fd.c b/fd.c
index 08a06589bc4294fd6c1c8f9f0ca54fdf407a96e8..30483006be2e4df5e3c2c3cd02650430eb949dbb 100644 (file)
--- a/fd.c
+++ b/fd.c
@@ -4,7 +4,7 @@
  * Licensed under the GPL v2. For licencing details see COPYING.
  */
 
-/** \file fd.c helper functions for file descriptor handling */
+/** \file fd.c Helper functions for file descriptor handling. */
 
 #include <sys/types.h>
 #include <dirent.h>
@@ -14,10 +14,11 @@
 
 #include "para.h"
 #include "error.h"
+
 /**
- * check whether a file exists
+ * Check whether a file exists.
  *
- * \param fn the file name
+ * \param fn The file name.
  *
  * \return Non-zero iff file exists.
  */
@@ -78,16 +79,16 @@ int mark_fd_nonblock(int fd)
 }
 
 /**
- * set a file descriptor in a fd_set
+ * Set a file descriptor in a fd_set.
  *
- * \param fd the file descriptor to be set
- * \param fds the file descriptor set
- * \param max_fileno highest-numbered file descriptor
+ * \param fd The file descriptor to be set.
+ * \param fds The file descriptor set.
+ * \param max_fileno Highest-numbered file descriptor.
  *
  * This wrapper for FD_SET() passes its first two arguments to \p FD_SET. Upon
  * return, \a max_fileno contains the maximum of the old_value and \a fd.
  *
- * \sa para_select
+ * \sa para_select.
 */
 void para_fd_set(int fd, fd_set *fds, int *max_fileno)
 {
@@ -110,10 +111,11 @@ void para_fd_set(int fd, fd_set *fds, int *max_fileno)
 }
 
 /**
-* paraslash's wrapper for fgets(3)
-* \param line pointer to the buffer to store the line
-* \param size the size of the buffer given by \a line
-* \param f the stream to read from
+* Paraslash's wrapper for fgets(3).
+
+* \param line Pointer to the buffer to store the line.
+* \param size The size of the buffer given by \a line.
+* \param f The stream to read from.
 *
 * \return Unlike the standard fgets() function, an integer value
 * is returned. On success, this function returns 1. On errors, -E_FGETS
@@ -139,12 +141,12 @@ again:
 /**
  * Paraslash's wrapper for mmap.
  *
- * \param length number of bytes to mmap
- * \param prot either PROT_NONE or the bitwise OR of one or more of
- * PROT_EXEC PROT_READ PROT_WRITE
- * \param flags exactly one of MAP_SHARED and MAP_PRIVATE
- * \param fd the file to mmap from
- * \param offset mmap start
+ * \param length Number of bytes to mmap.
+ * \param prot Either PROT_NONE or the bitwise OR of one or more of
+ * PROT_EXEC PROT_READ PROT_WRITE.
+ * \param flags Exactly one of MAP_SHARED and MAP_PRIVATE.
+ * \param fd The file to mmap from.
+ * \param offset Mmap start.
  *
  * \return This function either returns a valid pointer to the mapped area
  * or calls exit() on errors.
@@ -167,8 +169,8 @@ void *para_mmap(size_t length, int prot, int flags, int fd, off_t offset)
  * \param flags The usual open(2) flags.
  * \param mode Specifies the permissions to use.
  *
- * The mode parameter must be specified when O_CREAT is in the flags, and is ignored
- * otherwise.
+ * The mode parameter must be specified when O_CREAT is in the flags, and is
+ * ignored otherwise.
  *
  * \return The file descriptor on success, negative on errors.
  *
@@ -186,9 +188,9 @@ int para_open(const char *path, int flags, mode_t mode)
 /**
  * Wrapper for chdir(2).
  *
- * \param path the specified directory.
+ * \param path The specified directory.
  *
- * \return Positive on success, negative on errors.
+ * \return Standard.
  */
 int para_chdir(const char *path)
 {
@@ -206,7 +208,7 @@ int para_chdir(const char *path)
  * \param dir Result pointer.
  * \param cwd File descriptor of the current working directory.
  *
- * \return Positive on success, negative on errors.
+ * \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
@@ -236,13 +238,11 @@ int para_opendir(const char *dirname, DIR **dir, int *cwd)
        ret = para_chdir(dirname);
        if (ret < 0)
                goto close_cwd;
-       ret = -E_OPENDIR;
        *dir = opendir(".");
-       if (!*dir)
-               goto change_to_orig_dir;
-       return 1;
+       if (*dir)
+               return 1;
+       ret = -ERRNO_TO_PARA_ERROR(errno);
 /* Ignore return value of fchdir() and close(). We're busted anyway. */
-change_to_orig_dir:
        if (cwd)
                fchdir(*cwd);
 close_cwd:
@@ -254,14 +254,14 @@ close_cwd:
 /**
  * A wrapper for fchdir().
  *
- * \param fd An open file descriptor
+ * \param fd An open file descriptor.
  *
- * \return Positive on success, negative on errors.
+ * \return Standard.
  */
 int para_fchdir(int fd)
 {
        if (fchdir(fd) < 0)
-               return -E_FCHDIR;
+               return -ERRNO_TO_PARA_ERROR(errno);
        return 1;
 }