#include "log.h"
#include "osl.h"
#include "error.h"
+#include "fd.h"
/**
* Wrapper for the write system call.
*
* \return Standard.
*/
-static int para_chdir(const char *path)
+_static_inline_ int __chdir(const char *path)
{
- int ret = chdir(path);
-
- if (ret >= 0)
+ if (chdir(path) >= 0)
return 1;
return -ERRNO_TO_ERROR(errno);
}
return ret;
*cwd = ret;
}
- ret = para_chdir(dirname);
+ ret = __chdir(dirname);
if (ret < 0)
goto close_cwd;
*dir = opendir(".");
return ret;
}
-/**
- * A wrapper for fchdir().
- *
- * \param fd An open file descriptor.
- *
- * \return Standard.
- */
-int para_fchdir(int fd)
-{
- if (fchdir(fd) < 0)
- return -ERRNO_TO_ERROR(errno);
- return 1;
-}
-
/**
* Open a file and map it into memory.
*
return p;
}
+/**
+ * A wrapper for truncate(2)
+ *
+ * \param path Name of the regular file to truncate
+ * \param size Number of bytes to \b shave \b off
+ *
+ * Truncate the regular file named by \a path by \a size bytes.
+ *
+ * \return Standard.
+ *
+ * \sa truncate(2)
+ */
+int truncate_file(const char *path, off_t size)
+{
+ int ret;
+ struct stat statbuf;
+
+ ret = osl_stat(path, &statbuf);
+ if (ret < 0)
+ return ret;
+ ret = -E_OSL_BAD_SIZE;
+ if (statbuf.st_size < size)
+ return ret;
+ if (truncate(path, statbuf.st_size - size) < 0)
+ return -ERRNO_TO_ERROR(errno);
+ return 1;
+}