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-rw-r--r--libc/misc/lock/.indent.pro33
-rw-r--r--libc/misc/lock/Makefile44
-rw-r--r--libc/misc/lock/flock.c54
3 files changed, 131 insertions, 0 deletions
diff --git a/libc/misc/lock/.indent.pro b/libc/misc/lock/.indent.pro
new file mode 100644
index 000000000..492ecf1c7
--- /dev/null
+++ b/libc/misc/lock/.indent.pro
@@ -0,0 +1,33 @@
+--blank-lines-after-declarations
+--blank-lines-after-procedures
+--break-before-boolean-operator
+--no-blank-lines-after-commas
+--braces-on-if-line
+--braces-on-struct-decl-line
+--comment-indentation25
+--declaration-comment-column25
+--no-comment-delimiters-on-blank-lines
+--cuddle-else
+--continuation-indentation4
+--case-indentation0
+--else-endif-column33
+--space-after-cast
+--line-comments-indentation0
+--declaration-indentation1
+--dont-format-first-column-comments
+--dont-format-comments
+--honour-newlines
+--indent-level4
+/* changed from 0 to 4 */
+--parameter-indentation4
+--line-length78 /* changed from 75 */
+--continue-at-parentheses
+--no-space-after-function-call-names
+--dont-break-procedure-type
+--dont-star-comments
+--leave-optional-blank-lines
+--dont-space-special-semicolon
+--tab-size4
+/* additions by Mark */
+--case-brace-indentation0
+--leave-preprocessor-space
diff --git a/libc/misc/lock/Makefile b/libc/misc/lock/Makefile
new file mode 100644
index 000000000..e319c11df
--- /dev/null
+++ b/libc/misc/lock/Makefile
@@ -0,0 +1,44 @@
+# Makefile for uCLibc
+#
+# Copyright (C) 2000 by Lineo, inc.
+#
+# This program is free software; you can redistribute it and/or modify it under
+# the terms of the GNU Library General Public License as published by the Free
+# Software Foundation; either version 2 of the License, or (at your option) any
+# later version.
+#
+# This program is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+# FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
+# details.
+#
+# You should have received a copy of the GNU General Public License along with
+# this program; if not, write to the Free Software Foundation, Inc., 59 Temple
+# Place, Suite 330, Boston, MA 02111-1307 USA
+#
+# Derived in part from the Linux-8086 C library, the GNU C Library, and several
+# other sundry sources. Files within this library are copyright by their
+# respective copyright holders.
+
+TOPDIR=../../
+include $(TOPDIR)Rules.mak
+LIBC=$(TOPDIR)libc.a
+
+CSRC=flock.c
+COBJS=$(patsubst %.c,%.o, $(CSRC))
+OBJS=$(COBJS)
+
+all: $(OBJS) $(LIBC)
+
+$(LIBC): ar-target
+
+ar-target: $(OBJS)
+ $(AR) $(ARFLAGS) $(LIBC) $(OBJS)
+
+$(COBJS):
+ $(CC) $(CFLAGS) $< -c $*.c -o $*.o
+ $(STRIPTOOL) -x -R .note -R .comment $*.o
+
+clean:
+ rm -f *.[oa] *~ core
+
diff --git a/libc/misc/lock/flock.c b/libc/misc/lock/flock.c
new file mode 100644
index 000000000..3c1264655
--- /dev/null
+++ b/libc/misc/lock/flock.c
@@ -0,0 +1,54 @@
+/* Copyright (C) 1992, 1995, 1996, 1997 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Library General Public License as
+ published by the Free Software Foundation; either version 2 of the
+ License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Library General Public License for more details.
+
+ You should have received a copy of the GNU Library General Public
+ License along with the GNU C Library; see the file COPYING.LIB. If not,
+ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
+
+/* This file implements the `flock' function in terms of the POSIX.1 `fcntl'
+ locking mechanism. In 4BSD, these are two incompatible locking mechanisms,
+ perhaps with different semantics? */
+
+#include <errno.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/file.h>
+
+/* Apply or remove an advisory lock, according to OPERATION,
+ on the file FD refers to. */
+int flock( int fd, int operation)
+{
+ struct flock lbuf;
+
+ switch (operation & ~LOCK_NB) {
+ case LOCK_SH:
+ lbuf.l_type = F_RDLCK;
+ break;
+ case LOCK_EX:
+ lbuf.l_type = F_WRLCK;
+ break;
+ case LOCK_UN:
+ lbuf.l_type = F_UNLCK;
+ break;
+ default:
+ errno = EINVAL;
+ return -1;
+ }
+
+ lbuf.l_whence = SEEK_SET;
+ lbuf.l_start = lbuf.l_len = 0L; /* Lock the whole file. */
+
+ return fcntl(fd, (operation & LOCK_NB) ? F_SETLK : F_SETLKW, &lbuf);
+}
+