tests: Add example_stdio.c and test_stdio.sh.

2025-12-09 08:28:33 +01:00 · 2013-06-22 18:21:10 +02:00
parent e3234d6c08
commit a685b825aa
6 changed files with 207 additions and 2 deletions
--- a/tests/example_stdio.c
+++ b/tests/example_stdio.c
@@ -0,0 +1,140 @@
+/*
+ * Test all hooked stdio.h functions.
+ *
+ * Copyright (C) 2013  Simon Ruderich
+ *
+ * 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 3 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, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <config.h>
+
+/* For {fwrite,fputs,fputc}_unlocked(), if available. */
+#define _GNU_SOURCE
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <stdarg.h>
+
+#include "example.h"
+#include "../src/compiler.h"
+
+
+/* These are not in POSIX. */
+#ifndef HAVE_FWRITE_UNLOCKED
+static size_t fwrite_unlocked(void const *ptr, size_t size, size_t n, FILE *stream) {
+    return fwrite(ptr, size, n, stream);
+}
+#endif
+#ifndef HAVE_FPUTS_UNLOCKED
+static int fputs_unlocked(char const *s, FILE *stream) {
+    return fputs(s, stream);
+}
+#endif
+#ifndef HAVE_FPUTC_UNLOCKED
+static int fputc_unlocked(int c, FILE *stream) {
+    return fputc(c, stream);
+}
+#endif
+
+
+static int out;
+
+static void test_vprintf(char const *format, ...) noinline;
+static void test_vfprintf(FILE *stream, char const *format, ...) noinline;
+static void NEWLINE(void) noinline;
+
+static void test_vprintf(char const *format, ...) {
+    va_list ap;
+
+    va_start(ap, format);
+    vprintf(format, ap);
+    va_end(ap);
+}
+static void test_vfprintf(FILE *stream, char const *format, ...) {
+    va_list ap;
+
+    va_start(ap, format);
+    vfprintf(stream, format, ap);
+    va_end(ap);
+}
+
+static void NEWLINE(void) {
+    fflush(stdout);
+    fflush(stderr);
+    xwrite(out, "\n", 1);
+}
+
+
+int main(int argc, char **argv unused) {
+    /* stdout */
+
+    out = dup(STDOUT_FILENO);
+    if (out == -1) {
+        perror("dup");
+        return EXIT_FAILURE;
+    }
+
+    /* Redirect stdout to stderr so we can test all functions, including those
+     * not writing to stderr. */
+    xdup2(STDERR_FILENO, STDOUT_FILENO);
+
+    /* stdout redirected to stderr. */
+
+    xwrite(STDOUT_FILENO, "write()", 7); NEWLINE();
+    fwrite("fwrite()", 8, 1, stdout);   NEWLINE();
+
+    /* puts(3) */
+    fputs("fputs()", stdout); NEWLINE();
+    fputc('a', stdout);       NEWLINE();
+    putc('b', stdout);        NEWLINE();
+    putchar('c');             NEWLINE();
+    puts("puts()");           NEWLINE();
+
+    /* printf(3) */
+    printf("%s [%d]", "printf()", argc);                  NEWLINE();
+    fprintf(stdout, "%s [%d]", "fprintf()", argc);        NEWLINE();
+    test_vprintf("%s [%d]", "vprintf()", argc);           NEWLINE();
+    test_vfprintf(stdout, "%s [%d]", "vfprintf()", argc); NEWLINE();
+
+    /* unlocked_stdio(3) */
+    fwrite_unlocked("fwrite_unlocked()", 17, 1, stdout); NEWLINE();
+    fputs_unlocked("fputs_unlocked()", stdout);          NEWLINE();
+    /* FIXME: 'x', 'y' and 'z' are not colored */
+    fputc_unlocked('x', stdout);                         NEWLINE();
+    putc_unlocked('y', stdout);                          NEWLINE();
+    putchar_unlocked('z');                               NEWLINE();
+
+
+    /* stderr */
+
+    xwrite(STDERR_FILENO, "write()", 7); NEWLINE();
+    fwrite("fwrite()", 8, 1, stderr);   NEWLINE();
+
+    /* puts(3) */
+    fputs("fputs()", stderr); NEWLINE();
+    fputc('a', stderr);       NEWLINE();
+    putc('b', stderr);        NEWLINE();
+
+    /* printf(3) */
+    fprintf(stderr, "%s [%d]", "fprintf()", argc);        NEWLINE();
+    test_vfprintf(stderr, "%s [%d]", "vfprintf()", argc); NEWLINE();
+
+    /* unlocked_stdio(3) */
+    fwrite_unlocked("fwrite_unlocked()", 17, 1, stderr); NEWLINE();
+    fputs_unlocked("fputs_unlocked()", stderr);          NEWLINE();
+    fputc_unlocked('x', stderr);                         NEWLINE();
+    putc_unlocked('y', stderr);                          NEWLINE();
+
+    return EXIT_SUCCESS;
+}