[SERVER] Copy CRC-32 list from uplink server if available

Split up helper.c, move file/disk related functions to fileutil.c
Uplink: Make sure relayed requests are at least 1MiB

1 files changed, 75 insertions, 0 deletions

diff --git a/src/server/fileutil.c b/src/server/fileutil.c
new file mode 100644
index 0000000..ea247f0
--- /dev/null
+++ b/src/server/fileutil.c
@@ -0,0 +1,75 @@
+#include "fileutil.h"
+
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <sys/statvfs.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <assert.h>
+#include <string.h>
+
+int file_isReadable(char *file)
+{
+	int fd = open( file, O_RDONLY );
+	if ( fd < 0 ) return FALSE;
+	close( fd );
+	return TRUE;
+}
+
+int file_isWritable(char *file)
+{
+	int fd = open( file, O_WRONLY );
+	if ( fd >= 0 ) {
+		close( fd );
+		return TRUE;
+	}
+	fd = open( file, O_WRONLY | O_CREAT, 0600 );
+	if ( fd < 0 ) return FALSE;
+	close( fd );
+	unlink( file );
+	return TRUE;
+}
+
+int mkdir_p(const char* path)
+{
+	assert( path != NULL );
+	if ( *path == '\0' ) return TRUE;
+	char buffer[strlen( path ) + 1];
+	strcpy( buffer, path );
+	char *current = buffer;
+	char *slash;
+	while ( (slash = strchr( current, '/' )) != NULL ) {
+		*slash = '\0';
+		if ( *buffer != '\0' && mkdir( buffer, 0750 ) != 0 && errno != EEXIST ) return FALSE;
+		*slash = '/';
+		current = slash + 1;
+	}
+	if ( mkdir( buffer, 0750 ) != 0 && errno != EEXIST ) return FALSE;
+	return TRUE;
+}
+
+int file_alloc(int fd, uint64_t offset, uint64_t size)
+{
+	if ( fallocate( fd, 0, offset, size ) == 0 ) return TRUE; // fast way
+	if ( posix_fallocate( fd, offset, size ) == 0 ) return TRUE; // slow way
+	if ( lseek( fd, offset + size - 1, SEEK_SET ) != offset ) return FALSE; // dumb way
+	if ( write( fd, "", 1 ) != 1 ) return FALSE;
+	return TRUE;
+}
+
+uint64_t file_freeDiskSpace(const char * const path)
+{
+	struct statvfs fiData;
+	if ( (statvfs( path, &fiData )) < 0 ) {
+		return 0;
+	}
+	return ((uint64_t)fiData.f_bfree * (uint64_t)fiData.f_bsize * 95LL) / 100LL; // Assume 5% root reservation is active
+}
+
+time_t file_lastModification(const char * const file)
+{
+	struct stat st;
+	if ( stat( file, &st ) != 0 ) return 0;
+	return st.st_mtime;
+}