From: Sascha Schumann <sas@php.net>
Date: Fri, 22 Dec 2000 16:34:11 +0000 (+0000)
Subject: (php_file_copy) Use mmap to map the source file into our address space
X-Git-Tag: php-4.0.5RC1~815
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=3c9f50efaf4be64a6e824d927c92ee4301bbcde9;p=php

(php_file_copy) Use mmap to map the source file into our address space
and then simply write it out to the target file.  That avoids switching
between user and kernel land too many times.  If that does not work, we
fall back to the read/write method.
---

diff --git a/ext/standard/file.c b/ext/standard/file.c
index f9fb41f10c..ae0b9ab527 100644
--- a/ext/standard/file.c
+++ b/ext/standard/file.c
@@ -1658,6 +1658,7 @@ PHPAPI int php_copy_file(char *src, char *dest)
 {
 	char buffer[8192];
 	int fd_s,fd_t,read_bytes;
+	int ret = FAILURE;
 
 #ifdef PHP_WIN32
 	if ((fd_s=V_OPEN((src,O_RDONLY|_O_BINARY)))==-1) {
@@ -1677,18 +1678,36 @@ PHPAPI int php_copy_file(char *src, char *dest)
 		return FAILURE;
 	}
 
+#ifdef HAVE_MMAP
+	{
+		void *srcfile;
+		struct stat sbuf;
+
+		if (fstat(fd_s, &sbuf)) {
+			goto cleanup;
+		}
+		srcfile = mmap(NULL, sbuf.st_size, PROT_READ, MAP_SHARED, fd_s, 0);
+		if (srcfile) {
+			write(fd_t, srcfile, sbuf.st_size);
+			ret = SUCCESS;
+			munmap(srcfile, sbuf.st_size);
+			goto cleanup;
+		}
+	}
+#endif
+
 	while ((read_bytes=read(fd_s,buffer,8192))!=-1 && read_bytes!=0) {
 		if (write(fd_t,buffer,read_bytes)==-1) {
 			php_error(E_WARNING,"Unable to write to '%s':  %s", dest, strerror(errno));
-			close(fd_s);
-			close(fd_t);
-			return FAILURE;
+			goto cleanup;
 		}
 	}
+	ret = SUCCESS;
 	
+cleanup:
 	close(fd_s);
 	close(fd_t);
-	return SUCCESS;
+	return ret;
 }