tests: add chroot.test

* tests/chroot.c: New file.
* tests/chroot.test: New test.
* tests/.gitignore: Add chroot.
* tests/Makefile.am (check_PROGRAMS): Likewise.
(DECODER_TESTS): Add chroot.test.

tests/.gitignore

@@ -16,6 +16,7 @@ attach-p-cmd-p
 bpf
 caps
 chmod
+chroot
 clock_nanosleep
 clock_xettime
 copy_file_range

tests/Makefile.am

@@ -67,6 +67,7 @@ check_PROGRAMS = \
 	bpf \
 	caps \
 	chmod \
+	chroot \
 	clock_nanosleep \
 	clock_xettime \
 	copy_file_range \
@@ -255,6 +256,7 @@ DECODER_TESTS = \
 	bpf.test \
 	caps.test \
 	chmod.test \
+	chroot.test \
 	clock_nanosleep.test \
 	clock_xettime.test \
 	copy_file_range.test \

tests/chroot.c

@@ -0,0 +1,37 @@
+#include "tests.h"
+#include <sys/syscall.h>
+
+#ifdef __NR_chroot
+
+# include <errno.h>
+# include <stdio.h>
+# include <unistd.h>
+
+int
+main(void)
+{
+	static const char sample[] = "chroot.sample";
+	int rc = syscall(__NR_chroot ,sample);
+	const char *errno_text;
+	switch (errno) {
+		case ENOSYS:
+			errno_text = "ENOSYS";
+			break;
+		case EPERM:
+			errno_text = "EPERM";
+			break;
+		default:
+			errno_text = "ENOENT";
+	}
+	printf("chroot(\"%s\") = %d %s (%m)\n",
+	       sample, rc, errno_text);
+
+	puts("+++ exited with 0 +++");
+	return 0;
+}
+
+#else
+
+SKIP_MAIN_UNDEFINED("__NR_chroot")
+
+#endif

tests/chroot.test

@@ -0,0 +1,6 @@
+#!/bin/sh
+
+# Check chroot syscall decoding.
+
+. "${srcdir=.}/init.sh"
+run_strace_match_diff -a24