[SSHGuard-users] SSHGuard 2.5.0 build issue

[Marius S. <li...@sc...>]

This morning my FreeBSD Poudriere build system updated SSHGuard to version 2.5.0.

When I attempted to update the MacPorts Portfile (I’m the maintainer), I got the following build error:

../common/sandbox.c:43:9: error: call to undeclared function 'setresgid'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
   43 |     if (setresgid(pw->pw_gid, pw->pw_gid, pw->pw_gid) == -1) {
      |         ^
../common/sandbox.c:43:9: note: did you mean 'setregid'?
/Library/Developer/CommandLineTools/SDKs/MacOSX14.sdk/usr/include/unistd.h:593:6: note: 'setregid' declared here
  593 | int      setregid(gid_t, gid_t) __DARWIN_ALIAS(setregid);
      |          ^
../common/sandbox.c:46:9: error: call to undeclared function 'setresuid'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
   46 |     if (setresuid(pw->pw_uid, pw->pw_uid, pw->pw_uid) == -1) {
      |         ^
2 errors generated.
make[2]: *** [sandbox.o] Error 1

There is no “setresgid" function in macOS.

It should be defined in <unistd.h>, but doesn’t appear there.

It appears to be a GNU/Linux function (which FreeBSD also implements).

Marius
--
Marius Schamschula