Implemented tee(1).

1 files changed, 147 insertions, 0 deletions

diff --git a/coreutils/tee.c b/coreutils/tee.c
new file mode 100644
index 000000000..fe444fcc4
--- /dev/null
+++ b/coreutils/tee.c
@@ -0,0 +1,147 @@
+/*
+ * Mini tee implementation for busybox
+ *
+ *
+ * Copyright (C) 1999 by Lineo, inc.
+ * Written by John Beppu <beppu@line.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 <stdio.h>
+#include <stdlib.h>
+
+/* FileList _______________________________________________________________ */
+
+#define FL_MAX  1024
+static FILE *FileList[FL_MAX];
+static int  FL_end;
+
+typedef void (FL_Function)(FILE *file, char c);
+    
+/* initialize FileList */
+static void
+FL_init()
+{
+    FL_end = 0;
+    FileList[0] = stdout;
+}
+
+/* add a file to FileList */
+static int
+FL_add(const char *filename, char *opt_open)
+{
+    FILE    *file;
+
+    file = fopen(filename, opt_open);
+    if (!file) { return 0; };
+    if (FL_end < FL_MAX) {
+        FileList[++FL_end] = file;
+    }
+    return 1;
+}
+
+/* apply a function to everything in FileList */
+static void
+FL_apply(FL_Function *f, char c)
+{
+    int i;
+    for (i = 0; i <= FL_end; i++) {
+        f(FileList[i], c);
+    }
+}
+
+/* ________________________________________________________________________ */
+
+/* FL_Function for writing to files*/
+static void
+tee_fwrite(FILE *file, char c)
+{
+    fputc(c, file);
+}
+
+/* FL_Function for closing files */
+static void
+tee_fclose(FILE *file, char c)
+{
+    fclose(file);
+}
+
+/* help message */
+static void
+tee_usage()
+{
+    fprintf (
+        stdout,
+        "%s\n%s\n%s\n%s\n%s\n",
+        "Usage: tee [OPTION]... [FILE]...",
+        "Copy standard input to each FILE, and also to standard output.\n",
+        "  -a,    append to the given FILEs, do not overwrite",
+        "  -i,    ignore interrupt signals",
+        "  -h,    this help message"
+    );
+    exit(1);
+}
+
+/* BusyBoxed tee(1) */
+int
+tee_main(int argc, char **argv)
+{
+    int     i;
+    char    c;
+    char    opt;
+    char    opt_fopen[2] = "w";
+
+    /* parse argv[] */
+    for (i = 1; i < argc; i++) {
+        if (argv[i][0] == '-') {
+            opt = argv[i][1];
+            switch (opt) {
+                case 'a':
+                    opt_fopen[0] = 'a';
+                    break;
+                case 'i':
+                    fprintf(stderr, "ingore interrupt not implemented\n");
+                    break;
+                case 'h':
+                    tee_usage();
+                    break;
+                default:
+                    fprintf(stderr, "tee: invalid option -- %c\n", opt);
+                    tee_usage();
+            }
+        } else {
+            break;
+        }
+    }
+
+    /* init FILE pointers */
+    FL_init();
+    for ( ; i < argc; i++) {
+        FL_add(argv[i], opt_fopen);
+    }
+
+    /* read and redirect */
+    while ((c = (char) getchar()) && (!feof(stdin))) {
+        FL_apply(tee_fwrite, c);
+    }
+
+    /* clean up */
+    FL_apply(tee_fclose, 0);
+    exit(0);
+}
+
+/* $Id: tee.c,v 1.1 1999/12/10 05:27:16 beppu Exp $ */