add sys.readfile()

add args to linux runtime

SVN=124961

1 files changed, 80 insertions, 0 deletions

diff --git a/src/runtime/sys_file.c b/src/runtime/sys_file.c
new file mode 100644
index 000000000..80dec3da8
--- /dev/null
+++ b/src/runtime/sys_file.c
@@ -0,0 +1,80 @@
+// Copyright 2009 The Go Authors.  All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+#include "runtime.h"
+
+typedef uint64 dev_t;
+typedef uint64 ino_t;
+typedef uint32 mode_t;
+typedef uint64 nlink_t;
+typedef uint32 uid_t;
+typedef uint32 gid_t;
+typedef int64 off_t;
+typedef int64 blksize_t;
+typedef int64 blkcnt_t;
+typedef int64 time_t;
+
+struct timespec {
+	time_t tv_sec;
+	int64 tv_nsec;
+};
+
+struct stat {
+	dev_t	st_dev;     /* ID of device containing file */
+	ino_t	st_ino;     /* inode number */
+	nlink_t	st_nlink;   /* number of hard links */
+	mode_t	st_mode;    /* protection */
+	uid_t	st_uid;     /* user ID of owner */
+	gid_t	st_gid;     /* group ID of owner */
+	int32	pad0;
+	dev_t	st_rdev;    /* device ID (if special file) */
+	off_t	st_size;    /* total size, in bytes */
+	blksize_t st_blksize; /* blocksize for filesystem I/O */
+	blkcnt_t	st_blocks;  /* number of blocks allocated */
+	struct timespec	st_atime;   /* time of last access */
+	struct timespec	st_mtime;   /* time of last modification */
+	struct timespec	st_ctime;   /* time of last status change */
+};
+
+void
+sys·readfile(string filein, string fileout, bool okout)
+{
+	int32 fd;
+	byte namebuf[256];
+	struct stat statbuf;
+
+	fileout = nil;
+	okout = false;
+
+	if(filein == nil || filein->len >= sizeof(namebuf))
+		goto out;
+
+	mcpy(namebuf, filein->str, filein->len);
+	namebuf[filein->len] = '\0';
+	fd = open(namebuf, 0);
+	if(fd < 0)
+		goto out;
+
+	if (fstat(fd, &statbuf) < 0)
+		goto close_out;
+
+	if (statbuf.st_size <= 0)
+		goto close_out;
+
+	fileout = mal(sizeof(fileout->len)+statbuf.st_size + 1);
+	fileout->len = statbuf.st_size;
+
+	if (read(fd, fileout->str, statbuf.st_size) != statbuf.st_size) {
+		fileout = nil;
+		goto close_out;
+	}
+	okout = 1;
+
+close_out:
+	close(fd);
+out:
+	FLUSH(&fileout);
+	FLUSH(&okout);
+	return;
+}