From d2700053d6a0da8bf20a5fe6c4090e041b832b71 Mon Sep 17 00:00:00 2001
From: Thadeu Lima de Souza Cascardo <cascardo@cascardo.eti.br>
Date: Sat, 10 Dec 2016 11:22:09 -0200
Subject: [PATCH] =?utf8?q?dumpfile:=20joga=20o=20conte=C3=BAdo=20de=20um?=
 =?utf8?q?=20arquivo=20em=20um=20fd?=
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A função dumpfile lê o conteúdo de um arquivo e o escreve em um
descritor, que pode ser a saída padrão, por exemplo.
---
 lib/util.c | 20 +++++++++++++++++++-
 lib/util.h |  2 ++
 2 files changed, 21 insertions(+), 1 deletion(-)

diff --git a/lib/util.c b/lib/util.c
index 90ca426..eb2ee8e 100644
--- a/lib/util.c
+++ b/lib/util.c
@@ -1,5 +1,5 @@
 /*
- *  Copyright (C) 2015  Thadeu Lima de Souza Cascardo <cascardo@minaslivre.org>
+ *  Copyright (C) 2015-2016  Thadeu Lima de Souza Cascardo <cascardo@minaslivre.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
@@ -21,6 +21,9 @@
 #include <errno.h>
 #include <string.h>
 
+#include <fcntl.h>
+#include <unistd.h>
+
 int set_llong(char *str, long long *val)
 {
 	char *end = NULL;
@@ -56,3 +59,18 @@ int set_string(char **args, int argc, char **str)
 		return -errno;
 	return 0;
 }
+
+int dumpfile(int fd, char *filename)
+{
+	int inp;
+	char buffer[256];
+	int r;
+	inp = open(filename, O_RDONLY);
+	if (inp < 0)
+		return -errno;
+	while ((r = read(inp, buffer, sizeof(buffer))) > 0) {
+		write(fd, buffer, r);
+	}
+	close(inp);
+	return r;
+}
diff --git a/lib/util.h b/lib/util.h
index 754f5de..255a329 100644
--- a/lib/util.h
+++ b/lib/util.h
@@ -74,4 +74,6 @@ static inline int centavos(long long val)
 #define FMT_R "R$ %lld,%02d"
 #define R(l) reais(l), centavos(l)
 
+int dumpfile(int fd, char *filename);
+
 #endif
-- 
2.20.1