feat: add streq and printErr

user/globcat.c

@@ -0,0 +1,51 @@
+#include "ulib.h"
+
+/*
+ * Live proof that shell.c's new wildcard glob expansion (shellExpandGlobs)
+ * really hands a spawned process REAL, distinct filenames resolved from a
+ * pattern typed at the shell (`globcat /tmp/gd/ *.txt`) -- not a literal,
+ * unexpanded "*.txt" string, and not every file in the directory (the
+ * sibling /tmp/gd/c.log the driver thread also creates must NOT appear).
+ * Prints how many files it actually received, then each one's own path and
+ * content, all on fd 1 (unlike pipecat.c/hcat.c, this program's own argv
+ * and stdout ARE the thing being demonstrated, not a pipe payload it must
+ * keep pristine).
+ */
+
+static void printErr(const char* text)
+{
+    userWrite(2, text, stringLength(text));
+}
+
+int main(int argc, char** argv)
+{
+    print("globcat: got ");
+    printDec(argc - 1);
+    print(" files\n");
+
+    for (int i = 1; i < argc; i++) {
+        long fd = userOpen(argv[i], oReadOnly);
+        if (fd < 0) {
+            printErr("globcat: FAIL cannot open ");
+            printErr(argv[i]);
+            printErr("\n");
+            return 1;
+        }
+
+        char buffer[64];
+        long got = userRead((int)fd, buffer, sizeof(buffer) - 1);
+        userClose((int)fd);
+        if (got < 0) {
+            printErr("globcat: FAIL read\n");
+            return 1;
+        }
+        buffer[got] = 0;
+
+        print("globcat: ");
+        print(argv[i]);
+        print("=");
+        print(buffer);
+    }
+
+    return 0;
+}