* Added a small app that's able to truncate files - for testing purposes

only.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@24570 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/tests/system/libroot/posix/Jamfile

@@ -24,6 +24,10 @@ SimpleTest sigsetjmp_test
 	: sigsetjmp_test.c
 ;
 
+SimpleTest truncate
+	: truncate.cpp
+;
+
 SimpleTest init_rld_after_fork_test
 	: init_rld_after_fork_test.cpp
 ;

src/tests/system/libroot/posix/truncate.cpp

@@ -0,0 +1,52 @@
+/*
+ * Copyright 2008, Axel Dörfler, [email protected].
+ * Distributed under the terms of the MIT License.
+ */
+
+
+#include <ctype.h>
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <unistd.h>
+
+
+extern const char *__progname;
+
+
+int
+main(int argc, char **argv)
+{
+	if (argc < 3) {
+		fprintf(stderr, "usage: %s <file> <size>\n", __progname);
+		return 1;
+	}
+
+	struct stat st;
+	if (stat(argv[1], &st) != 0) {
+		fprintf(stderr, "%s: cannot stat file \"%s\": %s\n", __progname,
+			argv[1], strerror(errno));
+		return 1;
+	}
+
+	off_t newSize = strtoll(argv[2], NULL, 0);
+
+	printf("size   %10Ld\n", st.st_size);
+	printf("wanted %10Ld\n", newSize);
+	printf("Do you really want to truncate the file [y/N]? ");
+	fflush(stdout);
+
+	char yes[10];
+	if (fgets(yes, sizeof(yes), stdin) == NULL || tolower(yes[0]) != 'y')
+		return 0;
+
+	if (truncate(argv[1], newSize) != 0) {
+		fprintf(stderr, "%s: cannot truncate file \"%s\": %s\n", __progname,
+			argv[1], strerror(errno));
+		return 1;
+	}
+
+	return 0;
+}