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Diffstat (limited to 'i/pc104/initrd/conf/busybox/coreutils/head.c')
-rw-r--r--i/pc104/initrd/conf/busybox/coreutils/head.c140
1 files changed, 140 insertions, 0 deletions
diff --git a/i/pc104/initrd/conf/busybox/coreutils/head.c b/i/pc104/initrd/conf/busybox/coreutils/head.c
new file mode 100644
index 0000000..ed1d01d
--- /dev/null
+++ b/i/pc104/initrd/conf/busybox/coreutils/head.c
@@ -0,0 +1,140 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * head implementation for busybox
+ *
+ * Copyright (C) 2003 Manuel Novoa III <mjn3@codepoet.org>
+ *
+ * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
+ */
+
+/* BB_AUDIT SUSv3 compliant */
+/* BB_AUDIT GNU compatible -c, -q, and -v options in 'fancy' configuration. */
+/* http://www.opengroup.org/onlinepubs/007904975/utilities/head.html */
+
+#include "busybox.h"
+
+static const char head_opts[] =
+ "n:"
+#if ENABLE_FEATURE_FANCY_HEAD
+ "c:qv"
+#endif
+ ;
+
+#if ENABLE_FEATURE_FANCY_HEAD
+static const struct suffix_mult head_suffixes[] = {
+ { "b", 512 },
+ { "k", 1024 },
+ { "m", 1024*1024 },
+ { NULL, 0 }
+};
+#endif
+
+static const char header_fmt_str[] = "\n==> %s <==\n";
+
+int head_main(int argc, char **argv);
+int head_main(int argc, char **argv)
+{
+ unsigned long count = 10;
+ unsigned long i;
+#if ENABLE_FEATURE_FANCY_HEAD
+ int count_bytes = 0;
+ int header_threshhold = 1;
+#endif
+
+ FILE *fp;
+ const char *fmt;
+ char *p;
+ int opt;
+ int c;
+ int retval = EXIT_SUCCESS;
+
+#if ENABLE_INCLUDE_SUSv2 || ENABLE_FEATURE_FANCY_HEAD
+ /* Allow legacy syntax of an initial numeric option without -n. */
+ if (argc > 1 && argv[1][0] == '-'
+ && isdigit(argv[1][1])
+ ) {
+ --argc;
+ ++argv;
+ p = (*argv) + 1;
+ goto GET_COUNT;
+ }
+#endif
+
+ /* No size benefit in converting this to getopt32 */
+ while ((opt = getopt(argc, argv, head_opts)) > 0) {
+ switch (opt) {
+#if ENABLE_FEATURE_FANCY_HEAD
+ case 'q':
+ header_threshhold = INT_MAX;
+ break;
+ case 'v':
+ header_threshhold = -1;
+ break;
+ case 'c':
+ count_bytes = 1;
+ /* fall through */
+#endif
+ case 'n':
+ p = optarg;
+#if ENABLE_INCLUDE_SUSv2 || ENABLE_FEATURE_FANCY_HEAD
+ GET_COUNT:
+#endif
+
+#if !ENABLE_FEATURE_FANCY_HEAD
+ count = xatoul(p);
+#else
+ count = xatoul_sfx(p, head_suffixes);
+#endif
+ break;
+ default:
+ bb_show_usage();
+ }
+ }
+
+ argv += optind;
+ if (!*argv) {
+ *--argv = (char*)"-";
+ }
+
+ fmt = header_fmt_str + 1;
+#if ENABLE_FEATURE_FANCY_HEAD
+ if (argc - optind <= header_threshhold) {
+ header_threshhold = 0;
+ }
+#else
+ if (argc <= optind + 1) {
+ fmt += 11;
+ }
+ /* Now define some things here to avoid #ifdefs in the code below.
+ * These should optimize out of the if conditions below. */
+#define header_threshhold 1
+#define count_bytes 0
+#endif
+
+ do {
+ fp = fopen_or_warn_stdin(*argv);
+ if (fp) {
+ if (fp == stdin) {
+ *argv = (char *) bb_msg_standard_input;
+ }
+ if (header_threshhold) {
+ printf(fmt, *argv);
+ }
+ i = count;
+ while (i && ((c = getc(fp)) != EOF)) {
+ if (count_bytes || (c == '\n')) {
+ --i;
+ }
+ putchar(c);
+ }
+ if (fclose_if_not_stdin(fp)) {
+ bb_perror_msg("%s", *argv); /* Avoid multibyte problems. */
+ retval = EXIT_FAILURE;
+ }
+ die_if_ferror_stdout();
+ }
+ fmt = header_fmt_str;
+ } while (*++argv);
+
+ fflush_stdout_and_exit(retval);
+}