Check for zlib.h in addition to libz.

config.h.in

@@ -558,8 +558,8 @@
 /* Define to 1 if you have the `waitpid' function. */
 #undef HAVE_WAITPID
 
-/* Define to 1 if you the `zlib' library. */
-#undef HAVE_ZLIB
+/* Define to 1 if you have the <zlib.h> header file. */
+#undef HAVE_ZLIB_H
 
 /* Define to 1 if you have the `_getpty' function. */
 #undef HAVE__GETPTY

configure.in

@@ -1272,11 +1272,11 @@ AC_ARG_ENABLE(env_debug,
 AC_ARG_ENABLE(zlib,
 [AS_HELP_STRING([--enable-zlib[[=PATH]]], [Whether to enable or disable zlib])],
 [ case "$enableval" in
-    yes)    AC_DEFINE(HAVE_ZLIB)
+    yes)    AC_DEFINE(HAVE_ZLIB_H)
 	    ZLIB="-lz"
 	    ;;
     no)	    ;;
-    *)	    AC_DEFINE(HAVE_ZLIB)
+    *)	    AC_DEFINE(HAVE_ZLIB_H)
 	    CPPFLAGS="${CPPFLAGS} -I${enableval}/include"
 	    SUDO_APPEND_LIBPATH(ZLIB, [$enableval/lib])
 	    ZLIB="${ZLIB} -lz"
@@ -1285,8 +1285,7 @@ AC_ARG_ENABLE(zlib,
 ])
 if test X"$enable_zlib" = X""; then
     AC_CHECK_LIB(z, gzdopen, [
-	AC_DEFINE(HAVE_ZLIB)
-	ZLIB="-lz"
+	AC_CHECK_HEADERS(zlib.h, [ZLIB="-lz"])
     ])
 fi
 
@@ -2867,7 +2866,6 @@ AH_TEMPLATE(WITHOUT_PASSWD, [Define to avoid using the passwd/shadow file for au
 AH_TEMPLATE(sig_atomic_t, [Define to `int' if <signal.h> does not define.])
 AH_TEMPLATE(__signed, [Define to `signed' or nothing if compiler does not support a signed type qualifier.])
 AH_TEMPLATE(USING_NONUNIX_GROUPS, [Define to 1 if using a non-Unix group lookup implementation.])
-AH_TEMPLATE(HAVE_ZLIB, [Define to 1 if you the `zlib' library.])
 
 dnl
 dnl Bits to copy verbatim into config.h.in

plugins/sudoers/defaults.c

@@ -473,7 +473,7 @@ init_defaults(void)
     def_timestamp_timeout = TIMEOUT;
     def_passwd_timeout = PASSWORD_TIMEOUT;
     def_passwd_tries = TRIES_FOR_PASSWORD;
-#ifdef HAVE_ZLIB
+#ifdef HAVE_ZLIB_H
     def_compress_io = TRUE;
 #endif
 

plugins/sudoers/iolog.c

@@ -47,7 +47,7 @@
 #include <signal.h>
 #include <pwd.h>
 #include <grp.h>
-#ifdef HAVE_ZLIB
+#ifdef HAVE_ZLIB_H
 # include <zlib.h>
 #endif
 
@@ -55,7 +55,7 @@
 
 union io_fd {
     FILE *f;
-#ifdef HAVE_ZLIB
+#ifdef HAVE_ZLIB_H
     gzFile g;
 #endif
     void *v;
@@ -196,7 +196,7 @@ open_io_fd(char *pathbuf, int len, const char *suffix, int docompress)
     fd = open(pathbuf, O_CREAT|O_EXCL|O_WRONLY, S_IRUSR|S_IWUSR);
     if (fd != -1) {
 	fcntl(fd, F_SETFD, FD_CLOEXEC);
-#ifdef HAVE_ZLIB
+#ifdef HAVE_ZLIB_H
 	if (docompress)
 	    vfd = gzdopen(fd, "w");
 	else
@@ -304,7 +304,7 @@ sudoers_io_close(int exit_status, int error)
     for (i = 0; i < IOFD_MAX; i++) {
 	if (io_fds[i].v == NULL)
 	    continue;
-#ifdef HAVE_ZLIB
+#ifdef HAVE_ZLIB_H
 	if (def_compress_io)
 	    gzclose(io_fds[i].g);
 	else
@@ -329,7 +329,7 @@ sudoers_io_log(const char *buf, unsigned int len, int idx)
 
     gettimeofday(&now, NULL);
 
-#ifdef HAVE_ZLIB
+#ifdef HAVE_ZLIB_H
     if (def_compress_io)
 	gzwrite(io_fds[idx].g, buf, len);
     else
@@ -338,7 +338,7 @@ sudoers_io_log(const char *buf, unsigned int len, int idx)
     delay.tv_sec = now.tv_sec;
     delay.tv_usec = now.tv_usec;
     timevalsub(&delay, &last_time);
-#ifdef HAVE_ZLIB
+#ifdef HAVE_ZLIB_H
     if (def_compress_io)
 	gzprintf(io_fds[IOFD_TIMING].g, "%d %f %d\n", idx,
 	    delay.tv_sec + ((double)delay.tv_usec / 1000000), len);

plugins/sudoers/sudoreplay.c

@@ -76,7 +76,7 @@
 #ifdef HAVE_REGCOMP
 # include <regex.h>
 #endif
-#ifdef HAVE_ZLIB
+#ifdef HAVE_ZLIB_H
 # include <zlib.h>
 #endif
 #include <signal.h>
@@ -107,7 +107,7 @@ extern int optind;
 
 union io_fd {
     FILE *f;
-#ifdef HAVE_ZLIB
+#ifdef HAVE_ZLIB_H
     gzFile g;
 #endif
     void *v;
@@ -337,7 +337,7 @@ main(int argc, char *argv[])
     /*
      * Timing file consists of line of the format: "%f %d\n"
      */
-#ifdef HAVE_ZLIB
+#ifdef HAVE_ZLIB_H
     while (gzgets(io_fds[IOFD_TIMING].g, buf, sizeof(buf)) != NULL) {
 #else
     while (fgets(buf, sizeof(buf), io_fds[IOFD_TIMING].f) != NULL) {
@@ -379,7 +379,7 @@ main(int argc, char *argv[])
 		len = sizeof(buf);
 	    else
 		len = nbytes;
-#ifdef HAVE_ZLIB
+#ifdef HAVE_ZLIB_H
 	    nread = gzread(io_fds[idx].g, buf, len);
 #else
 	    nread = fread(buf, 1, len, io_fds[idx].f);
@@ -439,7 +439,7 @@ open_io_fd(char *path, int len, const char *suffix)
     path[len] = '\0';
     strlcat(path, suffix, PATH_MAX);
 
-#ifdef HAVE_ZLIB
+#ifdef HAVE_ZLIB_H
     return gzopen(path, "r");
 #else
     return fopen(path, "r");