feat: small coreutils added

1 files changed, 39 insertions, 0 deletions

diff --git a/sys/cmd/echo/echo.c b/sys/cmd/echo/echo.c
new file mode 100644
index 0000000..adac611
--- /dev/null
+++ b/sys/cmd/echo/echo.c
@@ -0,0 +1,39 @@
+#include <u.h>
+#include <libn.h>
+
+int
+main(int argc, char *argv[])
+{
+    char *s, *b, *c; 
+    int i, nnl, len;
+    static char buf[2*1024];
+
+    nnl = (argc>1) && strcmp(argv[1], "-n")==0;
+
+    len = 1;
+    for(i = 1+nnl; i < argc; i++)
+        len += strlen(argv[i])+1;
+
+    if (len >= arrlen(buf)) {
+        s = b = calloc(len, sizeof *s);
+        if (!s)
+            exits("no memory");
+    } else
+        s = b = buf;
+
+    for (i = 1+nnl; i < argc; i++) {
+        c = argv[i];
+        while(*c)
+            *b++ = *c++;
+        if (i < argc-1)
+            *b++ = ' ';
+    }
+
+    if (!nnl)
+        *b++ = '\n';
+
+    if (write(1, s, b-s) < 0)
+        exits("write error");
+
+    exit(0);
+}