checkin

1 files changed, 36 insertions, 0 deletions

diff --git a/src/cmd/core/basename.c b/src/cmd/core/basename.c
new file mode 100644
index 0000000..ba9d4c9
--- /dev/null
+++ b/src/cmd/core/basename.c
@@ -0,0 +1,36 @@
+#include <u.h>
+#include <base.h>
+#include <libfmt.h>
+
+static void
+usage(void)
+{
+    fmt·fprint(2,"usage: %s [-d] path [suffix]\n", argv0);
+    exits("usage");
+}
+
+int
+main(int argc, char *argv[])
+{
+    int  d;
+    long n;
+    char *p, *s;
+
+    ARGBEGIN{
+    case 'd': d = 1; break;
+    default:
+        usage();
+    }ARGEND;
+
+    if(argc < 1 || argc > 2)
+        usage();
+
+    p = d ? os·dirname(argv[0]) : os·basename(argv[0]);
+    if(argc>1){
+        n = strlen(p)-strlen(argv[1]);
+        if(n >= 0 && strcmp(p+n, argv[1])==0)
+            p[n] = 0;
+    }
+    puts(p);
+    exits(nil);
+}