Security-57031.1.35.tar.gz

[apple/security.git] / Security / libsecurity_ssl / sslViewer / fileIo.c

diff --git a/Security/libsecurity_ssl/sslViewer/fileIo.c b/Security/libsecurity_ssl/sslViewer/fileIo.c
new file mode 100644 (file)
index 0000000..802de34
--- /dev/null
+++ b/Security/libsecurity_ssl/sslViewer/fileIo.c
@@ -0,0 +1,116 @@
+/*
+ * Copyright (c) 2001-2003,2006-2012,2014 Apple Inc. All Rights Reserved.
+ *
+ * @APPLE_LICENSE_HEADER_START@
+ * 
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this
+ * file.
+ * 
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
+ * 
+ * @APPLE_LICENSE_HEADER_END@
+ */
+
+/*
+ * fileIo.c - simple file read/write utilities
+ */
+
+#include <unistd.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include "fileIo.h"
+
+int writeFile(
+       const char                      *fileName,
+       const unsigned char     *bytes,
+       unsigned                        numBytes)
+{
+       int             rtn;
+       int     fd;
+
+       fd = open(fileName, O_RDWR | O_CREAT | O_TRUNC, 0600);
+       if(fd < 0) {
+               return errno;
+       }
+       rtn = lseek(fd, 0, SEEK_SET);
+       if(rtn < 0) {
+               return errno;
+       }
+       rtn = write(fd, bytes, (size_t)numBytes);
+       if(rtn != (int)numBytes) {
+               if(rtn >= 0) {
+                       printf("writeFile: short write\n");
+               }
+               rtn = EIO;
+       }
+       else {
+               rtn = 0;
+       }
+       close(fd);
+       return rtn;
+}
+
+/*
+ * Read entire file.
+ */
+int readFile(
+       const char              *fileName,
+       unsigned char   **bytes,                // mallocd and returned
+       unsigned                *numBytes)              // returned
+{
+       int rtn;
+       int fd;
+       unsigned char *buf;
+       struct stat     sb;
+       unsigned size;
+
+       *numBytes = 0;
+       *bytes = NULL;
+       fd = open(fileName, O_RDONLY, 0);
+       if(fd < 0) {
+               return errno;
+       }
+       rtn = fstat(fd, &sb);
+       if(rtn) {
+               goto errOut;
+       }
+       size = sb.st_size;
+       buf = malloc(size);
+       if(buf == NULL) {
+               rtn = ENOMEM;
+               goto errOut;
+       }
+       rtn = lseek(fd, 0, SEEK_SET);
+       if(rtn < 0) {
+               goto errOut;
+       }
+       rtn = read(fd, buf, (size_t)size);
+       if(rtn != (int)size) {
+               if(rtn >= 0) {
+                       printf("readFile: short read\n");
+               }
+               rtn = EIO;
+       }
+       else {
+               rtn = 0;
+               *bytes = buf;
+               *numBytes = size;
+       }
+errOut:
+       close(fd);
+       return rtn;
+}