qrexec-lib: add support for verbose mode (echo just processed file)

qrexec-lib/libqubes-rpc-filecopy.h

@@ -63,6 +63,7 @@ enum {
 int copy_file(int outfd, int infd, long long size, unsigned long *crc32);
 char *copy_file_status_to_str(int status);
 void set_size_limit(long long new_bytes_limit, long long new_files_limit);
+void set_verbose(int value);
 int write_all(int fd, void *buf, int size);
 int read_all(int fd, void *buf, int size);
 int copy_fd_all(int fdout, int fdin);

qrexec-lib/unpack.c

@@ -16,6 +16,7 @@ long long bytes_limit = 0;
 long long files_limit = 0;
 long long total_bytes = 0;
 long long total_files = 0;
+int verbose = 0;
 
 void set_size_limit(long long new_bytes_limit, long long new_files_limit)
 {
@@ -23,6 +24,11 @@ void set_size_limit(long long new_bytes_limit, long long new_files_limit)
 	files_limit = new_files_limit;
 }
 
+void set_verbose(int value)
+{
+	verbose = value;
+}
+
 unsigned long crc32_sum = 0;
 int read_all_with_crc(int fd, void *buf, int size) {
 	int ret;
@@ -143,6 +149,8 @@ void process_one_file(struct file_header *untrusted_hdr)
 		process_one_file_dir(untrusted_hdr, untrusted_namebuf);
 	else
 		do_exit(EINVAL, untrusted_namebuf);
+	if (verbose && !S_ISDIR(untrusted_hdr->mode))
+		fprintf(stderr, "%s\n", untrusted_namebuf);
 }
 
 int do_unpack()