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From 21eed6939c15af59218f58a5ed858e56d62c3279 Mon Sep 17 00:00:00 2001
From: Michael Forney <mforney@mforney.org>
Date: Wed, 30 Nov 2016 00:03:40 -0800
Subject: [PATCH] libutil: Add writeall utility function
writeall makes successive write calls to write an entire buffer to the
output file descriptor. It returns the number of bytes written, or -1 on
the first error.
---
Makefile | 3 ++-
libutil/writeall.c | 21 +++++++++++++++++++++
util.h | 3 +++
3 files changed, 26 insertions(+), 1 deletion(-)
create mode 100644 libutil/writeall.c
diff --git a/Makefile b/Makefile
index 25bab70..a337ead 100644
--- a/Makefile
+++ b/Makefile
@@ -79,7 +79,8 @@ LIBUTILSRC =\
libutil/strlcpy.c\
libutil/strsep.c\
libutil/strtonum.c\
- libutil/unescape.c
+ libutil/unescape.c\
+ libutil/writeall.c
LIB = $(LIBUTF) $(LIBUTIL)
diff --git a/libutil/writeall.c b/libutil/writeall.c
new file mode 100644
index 0000000..4725ced
--- /dev/null
+++ b/libutil/writeall.c
@@ -0,0 +1,21 @@
+/* See LICENSE file for copyright and license details. */
+#include <unistd.h>
+
+#include "../util.h"
+
+ssize_t
+writeall(int fd, const void *buf, size_t len)
+{
+ const char *p = buf;
+ ssize_t n;
+
+ while (len) {
+ n = write(fd, p, len);
+ if (n <= 0)
+ return n;
+ p += n;
+ len -= n;
+ }
+
+ return p - (const char *)buf;
+}
diff --git a/util.h b/util.h
index b5860dc..eaad3ce 100644
--- a/util.h
+++ b/util.h
@@ -62,6 +62,9 @@ char *strsep(char **, const char *);
int enregcomp(int, regex_t *, const char *, int);
int eregcomp(regex_t *, const char *, int);
+/* io */
+ssize_t writeall(int, const void *, size_t);
+
/* misc */
void enmasse(int, char **, int (*)(const char *, const char *, int));
void fnck(const char *, const char *, int (*)(const char *, const char *, int), int);
--
2.11.0
|
