1 files changed, 111 insertions, 0 deletions
diff --git a/vendor/github.com/ethereum/ethash/src/libethash/io_posix.c b/vendor/github.com/ethereum/ethash/src/libethash/io_posix.c
new file mode 100644
index 000000000..c9a17d845
--- /dev/null
+++ b/vendor/github.com/ethereum/ethash/src/libethash/io_posix.c
@@ -0,0 +1,111 @@
+/*
+  This file is part of ethash.
+
+  ethash 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 3 of the License, or
+  (at your option) any later version.
+
+  ethash 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 ethash.  If not, see <http://www.gnu.org/licenses/>.
+*/
+/** @file io_posix.c
+ * @author Lefteris Karapetsas <lefteris@ethdev.com>
+ * @date 2015
+ */
+
+#include "io.h"
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <errno.h>
+#include <libgen.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <pwd.h>
+
+FILE* ethash_fopen(char const* file_name, char const* mode)
+{
+	return fopen(file_name, mode);
+}
+
+char* ethash_strncat(char* dest, size_t dest_size, char const* src, size_t count)
+{
+	return strlen(dest) + count + 1 <= dest_size ? strncat(dest, src, count) : NULL;
+}
+
+bool ethash_mkdir(char const* dirname)
+{
+	int rc = mkdir(dirname, S_IRWXU | S_IRWXG | S_IROTH | S_IXOTH);
+	return rc != -1 || errno == EEXIST;
+}
+
+int ethash_fileno(FILE *f)
+{
+	return fileno(f);
+}
+
+char* ethash_io_create_filename(
+	char const* dirname,
+	char const* filename,
+	size_t filename_length
+)
+{
+	size_t dirlen = strlen(dirname);
+	size_t dest_size = dirlen + filename_length + 1;
+	if (dirname[dirlen] != '/') {
+		dest_size += 1;
+	}
+	char* name = malloc(dest_size);
+	if (!name) {
+		return NULL;
+	}
+
+	name[0] = '\0';
+	ethash_strncat(name, dest_size, dirname, dirlen);
+	if (dirname[dirlen] != '/') {
+		ethash_strncat(name, dest_size, "/", 1);
+	}
+	ethash_strncat(name, dest_size, filename, filename_length);
+	return name;
+}
+
+bool ethash_file_size(FILE* f, size_t* ret_size)
+{
+	struct stat st;
+	int fd;
+	if ((fd = fileno(f)) == -1 || fstat(fd, &st) != 0) {
+		return false;
+	}
+	*ret_size = st.st_size;
+	return true;
+}
+
+bool ethash_get_default_dirname(char* strbuf, size_t buffsize)
+{
+	static const char dir_suffix[] = ".ethash/";
+	strbuf[0] = '\0';
+	char* home_dir = getenv("HOME");
+	if (!home_dir || strlen(home_dir) == 0)
+	{
+		struct passwd* pwd = getpwuid(getuid());
+		if (pwd)
+			home_dir = pwd->pw_dir;
+	}
+	
+	size_t len = strlen(home_dir);
+	if (!ethash_strncat(strbuf, buffsize, home_dir, len)) {
+		return false;
+	}
+	if (home_dir[len] != '/') {
+		if (!ethash_strncat(strbuf, buffsize, "/", 1)) {
+			return false;
+		}
+	}
+	return ethash_strncat(strbuf, buffsize, dir_suffix, sizeof(dir_suffix));
+}