Initial Spring 2016 commit.

2015-12-23 00:50:04 +00:00
commit cafa9f5690
732 changed files with 92195 additions and 0 deletions
--- a/kern/include/kern/fcntl.h
+++ b/kern/include/kern/fcntl.h
@@ -0,0 +1,100 @@
+/*
+ * Copyright (c) 2000, 2001, 2002, 2003, 2004, 2005, 2008
+ *	The President and Fellows of Harvard College.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE UNIVERSITY AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE UNIVERSITY OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef _KERN_FCNTL_H_
+#define _KERN_FCNTL_H_
+
+/*
+ * Constants for libc's <fcntl.h>.
+ */
+
+
+/*
+ * Important
+ */
+
+/* Flags for open: choose one of these: */
+#define O_RDONLY      0      /* Open for read */
+#define O_WRONLY      1      /* Open for write */
+#define O_RDWR        2      /* Open for read and write */
+/* then or in any of these: */
+#define O_CREAT       4      /* Create file if it doesn't exist */
+#define O_EXCL        8      /* With O_CREAT, fail if file already exists */
+#define O_TRUNC      16      /* Truncate file upon open */
+#define O_APPEND     32      /* All writes happen at EOF (optional feature) */
+#define O_NOCTTY     64      /* Required by POSIX, != 0, but does nothing */
+
+/* Additional related definition */
+#define O_ACCMODE     3      /* mask for O_RDONLY/O_WRONLY/O_RDWR */
+
+/*
+ * Not so important
+ */
+
+/* operation codes for flock() */
+#define LOCK_SH         1       /* shared lock */
+#define LOCK_EX         2       /* exclusive lock */
+#define LOCK_UN         3       /* release the lock */
+#define LOCK_NB         4       /* flag: don't block */
+
+/*
+ * Mostly pretty useless
+ */
+
+/* fcntl() operations */
+#define F_DUPFD         0       /* like dup() but not quite */
+#define F_GETFD         1       /* get per-handle flags */
+#define F_SETFD         2       /* set per-handle flags */
+#define F_GETFL         3       /* get per-file flags (O_* open flags) */
+#define F_SETFL         4       /* set per-file flags (O_* open flags) */
+#define F_GETOWN        5       /* get process/pgroup for SIGURG and SIGIO */
+#define F_SETOWN        6       /* set process/pgroup for SIGURG and SIGIO */
+#define F_GETLK         7       /* inspect record locks */
+#define F_SETLK         8       /* acquire record locks nonblocking */
+#define F_SETLKW        9       /* acquire record locks and wait */
+
+/* flag for F_GETFD and F_SETFD */
+#define FD_CLOEXEC      1       /* close-on-exec */
+
+/* modes for fcntl (F_GETLK/SETLK) locking */
+#define F_RDLCK         0       /* shared lock */
+#define F_WRLCK         1       /* exclusive lock */
+#define F_UNLCK         2       /* unlock */
+
+/* struct for fcntl (F_GETLK/SETLK) locking */
+struct flock {
+	off_t l_start;          /* place in file */
+	int l_whence;           /* SEEK_SET, SEEK_CUR, or SEEK_END */
+	int l_type;             /* F_RDLCK or F_WRLCK */
+	off_t l_len;            /* length of locked region */
+	pid_t l_pid;            /* process that holds the lock */
+};
+
+
+#endif /* _KERN_FCNTL_H_ */