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authorEric Andersen <andersen@codepoet.org>2003-10-09 08:35:42 +0000
committerEric Andersen <andersen@codepoet.org>2003-10-09 08:35:42 +0000
commitdae099b2f96ba46bfdd6b598b06dc88713b2d0e8 (patch)
tree0490983c989cc1fac5a5e5f34eb076d17c594e75 /libbb
parent638da75f4b82e3156d30705412b545d172870fc0 (diff)
downloadbusybox-dae099b2f96ba46bfdd6b598b06dc88713b2d0e8.tar.gz
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.
Diffstat (limited to 'libbb')
-rw-r--r--libbb/full_write.c2
-rw-r--r--libbb/safe_write.c48
2 files changed, 49 insertions, 1 deletions
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:
+*/