Add regress for vsyslog replacement.

MANIFEST

@@ -153,6 +153,7 @@ lib/util/regress/sudo_parseln/test5.out.ok
 lib/util/regress/sudo_parseln/test6.in
 lib/util/regress/sudo_parseln/test6.out.ok
 lib/util/regress/tailq/hltq_test.c
+lib/util/regress/vsyslog/vsyslog_test.c
 lib/util/secure_path.c
 lib/util/setgroups.c
 lib/util/sha2.c

configure

@@ -20551,6 +20551,7 @@ esac
 "
     done
 
+    COMPAT_TEST_PROGS="${COMPAT_TEST_PROGS}${COMPAT_TEST_PROGS+ }vsyslog_test"
 
 fi
 done

configure.ac

@@ -2690,6 +2690,7 @@ fi
 AC_CHECK_FUNCS([vsyslog], [], [
     AC_LIBOBJ(vsyslog)
     SUDO_APPEND_COMPAT_EXP(sudo_vsyslog)
+    COMPAT_TEST_PROGS="${COMPAT_TEST_PROGS}${COMPAT_TEST_PROGS+ }vsyslog_test"
 ])
 dnl
 dnl Function checks for sudo_noexec

lib/util/Makefile.in

@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2011-2015 Todd C. Miller <Todd.Miller@courtesan.com>
+# Copyright (c) 2011-2017 Todd C. Miller <Todd.Miller@courtesan.com>
 #
 # Permission to use, copy, modify, and distribute this software for any
 # purpose with or without fee is hereby granted, provided that the above
@@ -134,6 +134,8 @@ STRSPLIT_TEST_OBJS = strsplit_test.lo
 
 PARSE_GIDS_TEST_OBJS = parse_gids_test.lo
 
+VSYSLOG_TEST_OBJS = vsyslog_test.lo
+
 all: libsudo_util.la
 
 Makefile: $(srcdir)/Makefile.in
@@ -210,6 +212,9 @@ parse_gids_test: $(PARSE_GIDS_TEST_OBJS) libsudo_util.la
 strsplit_test: $(STRSPLIT_TEST_OBJS) libsudo_util.la
 	$(LIBTOOL) $(LTFLAGS) --mode=link $(CC) -o $@ $(STRSPLIT_TEST_OBJS) libsudo_util.la $(ASAN_LDFLAGS) $(PIE_LDFLAGS) $(SSP_LDFLAGS) $(TEST_LDFLAGS) $(TEST_LIBS)
 
+vsyslog_test: $(VSYSLOG_TEST_OBJS) libsudo_util.la
+	$(LIBTOOL) $(LTFLAGS) --mode=link $(CC) -o $@ $(VSYSLOG_TEST_OBJS) libsudo_util.la $(ASAN_LDFLAGS) $(PIE_LDFLAGS) $(SSP_LDFLAGS) $(TEST_LDFLAGS) $(TEST_LIBS)
+
 pre-install:
 
 install: install-dirs
@@ -273,6 +278,7 @@ check: $(TEST_PROGS)
 	    rm -f ./progname_test2; ln -s ./progname_test ./progname_test2; \
 	    ./progname_test2 || rval=`expr $$rval + $$?`; \
 	    rm -f ./progname_test2; \
+	    ./vsyslog_test || rval=`expr $$rval + $$?`; \
 	    build_dir=`pwd`; \
 	    cd $(srcdir); \
 	    for dir in sudo_conf sudo_parseln; do \
@@ -587,3 +593,8 @@ utimens.lo: $(srcdir)/utimens.c $(incdir)/compat/stdbool.h \
 	$(LIBTOOL) $(LTFLAGS) --mode=compile $(CC) -c -o $@ $(CPPFLAGS) $(CFLAGS) $(ASAN_CFLAGS) $(PIE_CFLAGS) $(SSP_CFLAGS) $(srcdir)/utimens.c
 vsyslog.lo: $(srcdir)/vsyslog.c $(incdir)/sudo_compat.h $(top_builddir)/config.h
 	$(LIBTOOL) $(LTFLAGS) --mode=compile $(CC) -c -o $@ $(CPPFLAGS) $(CFLAGS) $(ASAN_CFLAGS) $(PIE_CFLAGS) $(SSP_CFLAGS) $(srcdir)/vsyslog.c
+vsyslog_test.lo: $(srcdir)/regress/vsyslog/vsyslog_test.c \
+                 $(incdir)/compat/stdbool.h $(incdir)/sudo_compat.h \
+                 $(incdir)/sudo_fatal.h $(incdir)/sudo_util.h \
+                 $(top_builddir)/config.h
+	$(LIBTOOL) $(LTFLAGS) --mode=compile $(CC) -c -o $@ $(CPPFLAGS) $(CFLAGS) $(ASAN_CFLAGS) $(PIE_CFLAGS) $(SSP_CFLAGS) $(srcdir)/regress/vsyslog/vsyslog_test.c

lib/util/regress/vsyslog/vsyslog_test.c

@@ -0,0 +1,133 @@
+/*
+ * Copyright (c) 2017 Todd C. Miller <Todd.Miller@courtesan.com>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <config.h>
+
+#include <sys/types.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdarg.h>
+#ifdef HAVE_STRING_H
+# include <string.h>
+#endif /* HAVE_STRING_H */
+#ifdef HAVE_STRINGS_H
+# include <strings.h>
+#endif /* HAVE_STRINGS_H */
+#ifdef HAVE_STDBOOL_H
+# include <stdbool.h>
+#else
+# include "compat/stdbool.h"
+#endif
+#include <errno.h>
+
+#include "sudo_compat.h"
+#include "sudo_fatal.h"
+#include "sudo_util.h"
+
+__dso_public int main(int argc, char *argv[]);
+
+/*
+ * Test that sudo_vsyslog() works as expected.
+ */
+static char *expected_result;
+static int errors;
+
+/*
+ * Dummy version of syslog to verify the message
+ */
+void
+syslog(int priority, const char *fmt, ...)
+{
+    va_list ap;
+    const char *msg;
+
+    if (strcmp(fmt, "%s") != 0)
+	sudo_fatalx_nodebug("Expected syslog format \"%%s\", got \"%s\"", fmt);
+
+    va_start(ap, fmt);
+    msg = va_arg(ap, char *);
+    if (strcmp(msg, expected_result) != 0) {
+	sudo_warnx_nodebug("Expected \"%s\", got \"%s\"", expected_result, msg);
+	errors++;
+    }
+    va_end(ap);
+}
+
+static void
+test_vsyslog(int priority, const char *fmt, ...)
+{
+    va_list ap;
+
+    va_start(ap, fmt);
+    sudo_vsyslog(priority, fmt, ap);
+    va_end(ap);
+}
+
+int
+main(int argc, char *argv[])
+{
+    int ntests = 0;
+    char buf1[1024 * 16], buf2[1024 * 16];
+    initprogname(argc > 0 ? argv[0] : "vsyslog_test");
+
+    /* Test small buffer. */
+    expected_result = "sudo:  millert : TTY=ttypa ; PWD=/etc/mail ; USER=root ; TSID=000AB0 ; COMMAND=/usr/sbin/newaliases";
+    test_vsyslog(0,
+	"%s:  %s : TTY=%s ; PWD=%s ; USER=%s ; TSID=%s ; COMMAND=%s",
+	"sudo", "millert", "ttypa", "/etc/mail", "root", "000AB0",
+	"/usr/sbin/newaliases");
+    ntests++;
+
+    /* Test small buffer w/ errno. */
+    snprintf(buf1, sizeof(buf1),
+	 "unable to open %s: %s", "/var/log/sudo-io/seq", strerror(ENOENT));
+    expected_result = buf1;
+    errno = ENOENT;
+    test_vsyslog(0, "unable to open %s: %m", "/var/log/sudo-io/seq");
+    ntests++;
+
+    /* Test large buffer > 8192 bytes. */
+    memset(buf1, 'a', 8192);
+    buf1[8192] = '\0';
+    expected_result = buf1;
+    test_vsyslog(0, "%s", buf1);
+    ntests++;
+
+    /* Test large buffer w/ errno > 8192 bytes. */
+    memset(buf1, 'b', 8184);
+    buf1[8184] = '\0';
+    snprintf(buf2, sizeof(buf2), "%s: %s", buf1, strerror(EINVAL));
+    expected_result = buf2;
+    errno = EINVAL;
+    test_vsyslog(0, "%s: %m", buf1);
+    ntests++;
+
+    /* Test large buffer w/ errno > 8192 bytes. */
+    memset(buf1, 'b', 8184);
+    buf1[8184] = '\0';
+    snprintf(buf2, sizeof(buf2), "%s: %s", buf1, strerror(EINVAL));
+    expected_result = buf2;
+    errno = EINVAL;
+    strlcat(buf1, ": %m", sizeof(buf1));
+    test_vsyslog(0, buf1);
+    ntests++;
+
+    if (ntests != 0) {
+	printf("%s: %d tests run, %d errors, %d%% success rate\n",
+	    getprogname(), ntests, errors, (ntests - errors) * 100 / ntests);
+    }
+    exit(errors);
+}