Add re

1 files changed, 35 insertions, 0 deletions

diff --git a/re.c b/re.c
new file mode 100644
index 0000000..07b6846
--- /dev/null
+++ b/re.c
@@ -0,0 +1,35 @@
+#include <err.h>
+#include <stdio.h>
+#include <unistd.h>
+
+int
+main(int argc, char *argv[])
+{
+	char ans[10], file[30];
+	FILE *fp;
+	int i;
+
+	if (argc-1 == 0) {
+		fprintf(stderr, "usage: %s file ...\n", argv[0]);
+		return 1;
+	}
+
+	sprintf(file, "/var/tmp/re.%d", getppid());
+
+	if (!access(file, F_OK)) {
+		do
+			fprintf(stderr, "%s already exists; overwrite? ", file);
+		while (!gets(ans) || !*ans);
+		if (ans[0] != 'y') return 1;
+	}
+
+	if (!(fp = fopen(file, "w")))
+		err(1, "fopen");
+
+	for (i = 1; i < argc; i++) {
+		fprintf(fp, "%s\n", argv[i]);
+		printf("%s\n", argv[i]);
+	}
+
+	fclose(fp);
+}