We did not have a safe_write, which is the analog to safe_read. Convert

full_write to use safe_write internally, which is needed to guarantee proper
behavior, i.e. when writing to a pipe.

3 files changed, 50 insertions, 1 deletions

diff --git a/include/libbb.h b/include/libbb.h
index eb6841d33..7587a407c 100644
--- a/include/libbb.h
+++ b/include/libbb.h
@@ -109,6 +109,7 @@ extern int is_directory(const char *name, int followLinks, struct stat *statBuf)
 extern int remove_file(const char *path, int flags);
 extern int copy_file(const char *source, const char *dest, int flags);
 extern ssize_t safe_read(int fd, void *buf, size_t count);
+extern ssize_t safe_write(int fd, void *buf, size_t count);
 extern ssize_t bb_full_write(int fd, const void *buf, size_t len);
 extern ssize_t bb_full_read(int fd, void *buf, size_t len);
 extern int recursive_action(const char *fileName, int recurse,
diff --git a/libbb/full_write.c b/libbb/full_write.c
index 6f2255516..30c7a5079 100644
--- a/libbb/full_write.c
+++ b/libbb/full_write.c
@@ -36,7 +36,7 @@ ssize_t bb_full_write(int fd, const void *buf, size_t len)
 	total = 0;
 
 	while (len > 0) {
-		cc = write(fd, buf, len);
+		cc = safe_write(fd, buf, len);
 
 		if (cc < 0)
 			return cc;		/* write() returns -1 on failure. */
diff --git a/libbb/safe_write.c b/libbb/safe_write.c
new file mode 100644
index 000000000..dd35f35ae
--- /dev/null
+++ b/libbb/safe_write.c
@@ -0,0 +1,48 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * Utility routines.
+ *
+ * Copyright (C) 1999-2003 by Erik Andersen <andersen@codepoet.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include <stdio.h>
+#include <errno.h>
+#include <unistd.h>
+#include "libbb.h"
+
+
+
+ssize_t safe_write(int fd, void *buf, size_t count)
+{
+	ssize_t n;
+
+	do {
+		n = write(fd, buf, count);
+	} while (n < 0 && errno == EINTR);
+
+	return n;
+}
+
+
+/* END CODE */
+/*
+Local Variables:
+c-file-style: "linux"
+c-basic-offset: 4
+tab-width: 4
+End:
+*/