Reading input & writing output

logsend/Makefile

+TARGETS := whatsnew
+all: $(TARGETS)
+
+CFLAGS := -O0 -ggdb3
+LDFLAGS := -lcrypto -lssl

logsend/whatsnew.c

+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+const char *read_line() {
+	size_t buf_size = 10;
+	size_t pos = 0;
+	char *result = malloc(buf_size + 1);
+	while (fgets(result + pos, buf_size, stdin)) {
+		size_t len = strlen(result + pos);
+		if (result[pos + len - 1] == '\n')
+			return result;
+		pos += len;
+		result = realloc(result, (buf_size = buf_size * 2 + 10) + 1);
+	}
+	return pos ? result : NULL;
+}
+
+const char *const *read_lines() {
+	size_t size = 0, allocated = 0;
+	const char **result = NULL;
+	do {
+		if (size == allocated)
+			result = realloc(result, (allocated = 2 * allocated + 10) * sizeof *result);
+	} while ((result[size ++] = read_line())); // Keep reading until you find NULL
+	return result;
+}
+
+void dump_lines(const char *const *lines) {
+	while (*lines)
+		fputs(*lines ++, stdout);
+}
+
+int main(int argc, const char *argv[]) {
+	const char *const *lines = read_lines();
+	dump_lines(lines);
+	return 0;
+}