1 files changed, 70 insertions, 0 deletions
diff --git a/FICS/copyfile.c b/FICS/copyfile.c
new file mode 100644
index 0000000..32c1ce3
--- /dev/null
+++ b/FICS/copyfile.c
@@ -0,0 +1,70 @@
+// SPDX-FileCopyrightText: 2025 Markus Uhlin <maxxe@rpblc.net>
+// SPDX-License-Identifier: ISC
+
+#include <sys/stat.h>
+
+#include <err.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "copyfile.h"
+
+bool
+fics_copyfile(const char *p1, const char *p2)
+{
+	char	tmp[2048] = { '\0' };
+	int	fd[2];
+	ssize_t ret[2];
+	ssize_t total_read = 0;
+	ssize_t total_written = 0;
+
+	if (p1 == NULL || p2 == NULL ||
+	    strcmp(p1, "") == 0 ||
+	    strcmp(p2, "") == 0)
+		return false;
+	if ((fd[0] = open(p1, O_RDONLY)) < 0) {
+		warn("%s: open(%s, ...)", __func__, p1);
+		return false;
+	}
+
+	fd[1] = open(p2, (O_RDWR|O_APPEND|O_CREAT|O_TRUNC),
+	    (S_IRUSR|S_IWUSR|S_IRGRP));
+	if (fd[1] < 0) {
+		warn("%s: open(%s, ...)", __func__, p2);
+		close(fd[0]);
+		return false;
+	}
+
+	while ((ret[0] = read(fd[0], tmp, sizeof tmp)) != -1 && ret[0] != 0) {
+		total_read += ret[0];
+
+		if ((ret[1] = write(fd[1], tmp, ret[0])) != ret[0]) {
+			warnx("%s: written mismatch read", __func__);
+			break;
+		}
+
+		total_written += ret[1];
+	}
+
+	close(fd[0]);
+	close(fd[1]);
+
+	if (total_read != total_written) {
+		warnx("%s: total written mismatch total read", __func__);
+		return false;
+	}
+
+	return true;
+}
+
+bool
+is_regular_file(const char *path)
+{
+	struct stat sb = { 0 };
+
+	if (path == NULL || strcmp(path, "") == 0)
+		return false;
+	return (stat(path, &sb) == 0 && S_ISREG(sb.st_mode));
+}