1 files changed, 44 insertions, 0 deletions
diff --git a/next.c b/next.c
new file mode 100644
index 0000000..f82e437
--- /dev/null
+++ b/next.c
@@ -0,0 +1,44 @@
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#include <sys/mman.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+
+int
+main(int argc, char *argv[])
+{
+	int fd;
+	struct stat st;
+
+	fd = open("map", O_RDONLY);
+	if (!fd)
+		exit(101);
+
+	fstat(fd, &st);
+	char *map = mmap(0, st.st_size, PROT_READ, MAP_PRIVATE, fd, 0);
+	if (!map)
+		exit(102);
+
+	char *s = strstr(map, argv[1]);
+	if (!argv[1][0] || !s) {
+		// default to first line
+		s = map;
+	} else {
+		while (*s && *s != '\n')
+			s++;
+		s++;
+	}
+	char *t = s;
+	while (*t && *t != '\n')
+		t++;
+	if (!*t)
+		exit(1);
+	t++;
+	write(1, s, t-s);
+
+	return 0;
+}