1 files changed, 99 insertions, 0 deletions
diff --git a/release/src/router/busybox/head.c b/release/src/router/busybox/head.c
new file mode 100644
index 00000000..0c8ef3d5
--- /dev/null
+++ b/release/src/router/busybox/head.c
@@ -0,0 +1,99 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * Mini head implementation for busybox
+ *
+ *
+ * Copyright (C) 1999,2000,2001 by Lineo, inc.
+ * Written by John Beppu <beppu@lineo.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
+#include <errno.h>
+#include <stdio.h>
+#include <getopt.h>
+#include <stdlib.h>
+#include <string.h>
+#include "busybox.h"
+
+static int head(int len, FILE *fp)
+{
+	int i;
+	char *input;
+
+	for (i = 0; i < len; i++) {
+		if ((input = get_line_from_file(fp)) == NULL)
+			break;
+		fputs(input, stdout);
+		free(input);
+	}
+	return 0;
+}
+
+/* BusyBoxed head(1) */
+int head_main(int argc, char **argv)
+{
+	FILE *fp;
+	int need_headers, opt, len = 10, status = EXIT_SUCCESS;
+
+	/* parse argv[] */
+	while ((opt = getopt(argc, argv, "n:")) > 0) {
+		switch (opt) {
+		case 'n':
+			len = atoi(optarg);
+			if (len >= 1)
+				break;
+			/* fallthrough */
+		default:
+			show_usage();
+		}
+	}
+
+	/* get rest of argv[] or stdin if nothing's left */
+	if (argv[optind] == NULL) {
+		head(len, stdin);
+		return status;
+	} 
+
+	need_headers = optind != (argc - 1);
+	while (argv[optind]) {
+		if (strcmp(argv[optind], "-") == 0) {
+			fp = stdin;
+			argv[optind] = "standard input";
+		} else {
+			if ((fp = wfopen(argv[optind], "r")) == NULL)
+				status = EXIT_FAILURE;
+		}
+		if (fp) {
+			if (need_headers) {
+				printf("==> %s <==\n", argv[optind]);
+			}
+			head(len, fp);
+			if (errno) {
+				perror_msg("%s", argv[optind]);
+				status = EXIT_FAILURE;
+				errno = 0;
+			}
+			if (optind < argc - 1)
+				putchar('\n');
+			if (fp != stdin)
+				fclose(fp);
+		}
+		optind++;
+	}
+
+	return status;
+}