}
/**
- * paraslash's wrapper for select(2)
+ * Paraslash's wrapper for select(2).
*
* It calls select(2) (with no exceptfds) and starts over if select() was
* interrupted by a signal.
*
- * \param n the highest-numbered descriptor in any of the two sets, plus 1
- * \param readfds fds that should be checked for readability
- * \param writefds fds that should be checked for writablility
+ * \param n The highest-numbered descriptor in any of the two sets, plus 1.
+ * \param readfds fds that should be checked for readability.
+ * \param writefds fds that should be checked for writablility.
* \param timeout_tv upper bound on the amount of time elapsed before select()
- * returns
+ * returns.
*
- * \return The return value of the underlying select() call.
+ * \return The return value of the underlying select() call on success, the
+ * negative system error code on errors.
*
* All arguments are passed verbatim to select(2).
- * \sa select(2) select_tut(2)
+ * \sa select(2) select_tut(2).
*/
int para_select(int n, fd_set *readfds, fd_set *writefds,
struct timeval *timeout_tv)
err = errno;
} while (ret < 0 && err == EINTR);
if (ret < 0)
- PARA_CRIT_LOG("select error: %s, max_fileno: %d\n",
- strerror(err), n);
+ return -ERRNO_TO_PARA_ERROR(errno);
return ret;
}
* The mode parameter must be specified when O_CREAT is in the flags, and is ignored
* otherwise.
*
- * \return Positive on success, negative on errors.
+ * \return The file descriptor on success, negative on errors.
*
* \sa open(2).
*/
if (ret >= 0)
return ret;
- switch (errno) {
- case EEXIST:
- ret = -E_EXIST;
- break;
- case EISDIR:
- ret = -E_ISDIR;
- break;
- case ENOENT:
- ret = -E_NOENT;
- break;
- case EPERM:
- ret = -E_OPEN_PERM;
- break;
- };
- PARA_ERROR_LOG("failed to open %s: %s\n", path, strerror(errno));
- return -E_OPEN;
+ return -ERRNO_TO_PARA_ERROR(errno);
}
/**
if (ret >= 0)
return 1;
- switch (errno) {
- case ENOENT:
- return -E_NOENT;
- case EACCES:
- return -E_CHDIR_PERM;
- };
- return -E_CHDIR;
+ return -ERRNO_TO_PARA_ERROR(errno);
}
/**
* \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
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)
*
* \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;
}
* \param path Name of the directory to create.
* \param mode The permissions to use.
*
- * \return positive on success, negative on errors.
+ * \return Standard.
*/
int para_mkdir(const char *path, mode_t mode)
{
if (!mkdir(path, mode))
return 1;
- if (errno == EEXIST)
- return -E_EXIST;
- if (errno == ENOSPC)
- return -E_NOSPC;
- if (errno == ENOTDIR)
- return -E_NOTDIR;
- if (errno == EPERM)
- return -E_MKDIR_PERM;
- return -E_MKDIR;
+ return -ERRNO_TO_PARA_ERROR(errno);
}