From: Ben Gras <ben@minix3.org>
Date: Tue, 20 Dec 2005 14:18:16 +0000 (+0000)
Subject: Added truncate() and ftruncate() library calls (no FS support yet).
X-Git-Tag: v3.1.2a~469
X-Git-Url: http://zhaoyanbai.com/repos/%22https:/www.google.com/jsapi/static/mdoc.3.html?a=commitdiff_plain;h=ffe192724ea1e4877610e7843576b8a12c9961f2;p=minix.git

Added truncate() and ftruncate() library calls (no FS support yet).

Added ELOOP message to errlist.
---

diff --git a/lib/ansi/errlist.c b/lib/ansi/errlist.c
index f336b02aa..69ede4e4a 100755
--- a/lib/ansi/errlist.c
+++ b/lib/ansi/errlist.c
@@ -49,7 +49,7 @@ const char *_sys_errlist[] = {
 	"No locks available",		/* ENOLCK */
 	"Function not implemented",	/* ENOSYS */
 	"Directory not empty",		/* ENOTEMPTY */
-	unknown,			/* 40 */
+	"Too many levels of symbolic links",	/* ELOOP */
 	unknown,			/* 41 */
 	unknown,			/* 42 */
 	unknown,			/* 43 */
diff --git a/lib/posix/Makefile b/lib/posix/Makefile
index 94bf96f7f..4ef614d9e 100755
--- a/lib/posix/Makefile
+++ b/lib/posix/Makefile
@@ -47,6 +47,7 @@ libc_OBJECTS	= \
 	_kill.o \
 	_link.o \
 	_lseek.o \
+	_lstat.o \
 	_mkdir.o \
 	_mkfifo.o \
 	_mknod.o \
@@ -62,6 +63,7 @@ libc_OBJECTS	= \
 	_rename.o \
 	_rewinddir.o \
 	_rmdir.o \
+	_readlink.o \
 	_select.o \
 	_setgid.o \
 	_setsid.o \
@@ -76,6 +78,7 @@ libc_OBJECTS	= \
 	_sleep.o \
 	_stat.o \
 	_stime.o \
+	_symlink.o \
 	_sync.o \
 	_tcdrain.o \
 	_tcflow.o \
@@ -85,6 +88,7 @@ libc_OBJECTS	= \
 	_tcsetattr.o \
 	_time.o \
 	_times.o \
+	_truncate.o \
 	_umask.o \
 	_umount.o \
 	_uname.o \
@@ -93,14 +97,11 @@ libc_OBJECTS	= \
 	_wait.o \
 	_waitpid.o \
 	_write.o \
-	gettimeofday.o \
+	getloadavg.o \
 	getopt.o \
-	_lstat.o \
+	gettimeofday.o \
 	priority.o \
-	_readlink.o \
-	_symlink.o \
 	usleep.o \
-	getloadavg.o
 
 include ../Makefile.inc
 
diff --git a/lib/posix/_truncate.c b/lib/posix/_truncate.c
new file mode 100755
index 000000000..f939ea0b4
--- /dev/null
+++ b/lib/posix/_truncate.c
@@ -0,0 +1,22 @@
+#include <lib.h>
+#define truncate	_truncate
+#define ftruncate	_ftruncate
+#include <unistd.h>
+
+PUBLIC int truncate(const char *_path, off_t _length)
+{
+  message m;
+  m.m1_p1 = (char *) _path;
+  m.m1_i1 = _length;
+
+  return(_syscall(FS, TRUNCATE, &m));
+}
+
+PUBLIC int ftruncate(int _fd, off_t _length)
+{
+  message m;
+  m.m1_i2 = _fd;
+  m.m1_i1 = _length;
+
+  return(_syscall(FS, FTRUNCATE, &m));
+}
diff --git a/lib/syscall/Makefile b/lib/syscall/Makefile
index db24d39b6..b730d2bbe 100755
--- a/lib/syscall/Makefile
+++ b/lib/syscall/Makefile
@@ -101,6 +101,7 @@ libc_OBJECTS	= \
 	tcsetattr.o \
 	time.o \
 	times.o \
+	truncate.o \
 	umask.o \
 	umount.o \
 	uname.o \
diff --git a/lib/syscall/truncate.s b/lib/syscall/truncate.s
new file mode 100755
index 000000000..1915ad785
--- /dev/null
+++ b/lib/syscall/truncate.s
@@ -0,0 +1,13 @@
+.sect .text
+.extern	__truncate
+.extern	__ftruncate
+.define	_truncate
+.define	_ftruncate
+.align 2
+
+_truncate:
+	jmp	__truncate
+
+.align 2
+_ftruncate:
+	jmp	__ftruncate