There is no need for cpath or the unveil of . in the rsync process. That process just does fork+exec for rsync. Removing the unveil pledge is the same as unveil(NULL, NULL) so skip that too.
OK? -- :wq Claudio Index: main.c =================================================================== RCS file: /cvs/src/usr.sbin/rpki-client/main.c,v retrieving revision 1.104 diff -u -p -r1.104 main.c --- main.c 22 Feb 2021 09:46:05 -0000 1.104 +++ main.c 23 Feb 2021 10:42:24 -0000 @@ -941,8 +941,7 @@ main(int argc, char *argv[]) if (fchdir(cachefd) == -1) err(1, "fchdir"); - if (pledge("stdio rpath cpath proc exec unveil", NULL) - == -1) + if (pledge("stdio rpath proc exec unveil", NULL) == -1) err(1, "pledge"); proc_rsync(rsync_prog, bind_addr, fd[0]); Index: rsync.c =================================================================== RCS file: /cvs/src/usr.sbin/rpki-client/rsync.c,v retrieving revision 1.18 diff -u -p -r1.18 rsync.c --- rsync.c 19 Feb 2021 08:14:49 -0000 1.18 +++ rsync.c 23 Feb 2021 10:41:50 -0000 @@ -160,13 +160,6 @@ proc_rsync(char *prog, char *bind_addr, } else if (unveil(prog, "x") == -1) err(1, "%s: unveil", prog); - /* Unveil the repository directory and terminate unveiling. */ - - if (unveil(".", "c") == -1) - err(1, "unveil"); - if (unveil(NULL, NULL) == -1) - err(1, "unveil"); - if (pledge("stdio proc exec", NULL) == -1) err(1, "pledge");