Hello, It seems cpu command is buggy in -P option. the sources of the problem is in command option -P of exportfs.
I believe /sys/src/cmd/exportfs/pattern.c should be fixed as follows: int excludefile(char *path) { Reprog **re; char *p; if(*(path+1) == 0) p = "/"; else p = path+1; DEBUG(DFD, "checking %s\n", p); for(re = include; *re != nil; re++){ - if(regexec(*re, p, nil, 0) != 1){ + if(regexec(*re, p, nil, 0) == 1){ DEBUG(DFD, "excluded+ %s\n", p); - return -1; + return 0; } } for(re = exclude; *re != nil; re++){ if(regexec(*re, p, nil, 0) == 1){ DEBUG(DFD, "excluded- %s\n", p); return -1; } } return 0; } patternfile sample + /usr/arisawa + /usr/glenda - /adm - /sys/log - /mail - /usr/.*