[BusyBox-cvs] busybox/libbb copy_file.c,1.22,1.23 copyfd.c,1.3,1.4 print_file.c,1.4,1.5

[Glenn McGrath]

Update of /var/cvs/busybox/libbb
In directory winder:/tmp/cvs-serv23731/libbb

Modified Files:
	copy_file.c copyfd.c print_file.c 
Log Message:
Merge copyfd and copy_file_chunk


Index: copy_file.c
===================================================================
RCS file: /var/cvs/busybox/libbb/copy_file.c,v
retrieving revision 1.22
retrieving revision 1.23
diff -u -d -r1.22 -r1.23
--- copy_file.c	17 Sep 2002 08:42:21 -0000	1.22
+++ copy_file.c	13 Dec 2002 08:20:43 -0000	1.23
@@ -183,7 +183,7 @@
 			}
 		}
 
-		if (copy_file_chunk(sfp, dfp, -1) < 0)
+		if (copyfd(fileno(sfp), fileno(dfp), 0) == -1)
 			status = -1;
 
 		if (fclose(dfp) < 0) {

Index: copyfd.c
===================================================================
RCS file: /var/cvs/busybox/libbb/copyfd.c,v
retrieving revision 1.3
retrieving revision 1.4
diff -u -d -r1.3 -r1.4
--- copyfd.c	24 Oct 2001 04:59:38 -0000	1.3
+++ copyfd.c	13 Dec 2002 08:20:43 -0000	1.4
@@ -24,27 +24,54 @@
 #include <errno.h>
 #include "libbb.h"
 
-
-extern int copyfd(int fd1, int fd2)
+/* If chunksize is 0 copy untill EOF */
+extern int copyfd(int fd1, int fd2, const off_t chunksize)
 {
-	char buf[8192];
-	ssize_t nread, nwrote;
+	size_t nread;
+	size_t nwritten;
+	size_t size;
+	size_t remaining;
+	char buffer[BUFSIZ];
+
+	if (chunksize) {
+		remaining = chunksize;
+	} else {
+		remaining = -1;
+	}
+
+	do {
+		if ((chunksize > BUFSIZ) || (chunksize == 0)) {
+			size = BUFSIZ;
+		} else {
+			size = chunksize;
+		}
+
+		nread = safe_read(fd1, buffer, size);
 
-	while (1) {
-		nread = safe_read(fd1, buf, sizeof(buf));
-		if (nread == 0)
-			break;
 		if (nread == -1) {
-			perror_msg("read");
-			return -1;
+			perror_msg("read failure");
+			return(-1);
+		}
+		else if (nread == 0) {
+			if (chunksize) {
+				error_msg("Unable to read all data");
+				return(-1);
+			} else {
+				return(0);
+			}
 		}
 
-		nwrote = full_write(fd2, buf, nread);
-		if (nwrote == -1) {
-			perror_msg("write");
-			return -1;
+		nwritten = full_write(fd2, buffer, nread);
+
+		if (nwritten != nread) {
+			error_msg("Unable to write all data");
+			return(-1);
 		}
-	}
+
+		if (chunksize) {
+			remaining -= nwritten;
+		}
+	} while (remaining != 0);
 
 	return 0;
 }

Index: print_file.c
===================================================================
RCS file: /var/cvs/busybox/libbb/print_file.c,v
retrieving revision 1.4
retrieving revision 1.5
diff -u -d -r1.4 -r1.5
--- print_file.c	24 Oct 2001 04:59:38 -0000	1.4
+++ print_file.c	13 Dec 2002 08:20:43 -0000	1.5
@@ -20,6 +20,7 @@
  */
 
 #include <stdio.h>
+#include <stdlib.h>
 #include <sys/stat.h>
 #include "libbb.h"
 
@@ -27,7 +28,9 @@
 extern void print_file(FILE *file)
 {
 	fflush(stdout);
-	copyfd(fileno(file), fileno(stdout));
+	if (copyfd(fileno(file), fileno(stdout), 0) == -1) {
+		exit(EXIT_FAILURE);
+	}
 	fclose(file);
 }