ref: ad37339a1c39c90f51d273abe60f552d3900f752
dir: /sys/src/cmd/exportfs/exportfs.c/
#include <u.h> #include <libc.h> #include <fcall.h> #define Extern #include "exportfs.h" int srvfd = -1; int readonly; void usage(void) { fprint(2, "usage: %s [-dsR] [-f dbgfile] [-m msize] [-r root] " "[-S srvfile] [-P exclusion-file]\n", argv0); fatal("usage"); } void main(int argc, char **argv) { char *dbfile, *srv, *srvfdfile; int n; dbfile = "/tmp/exportdb"; srv = nil; srvfd = -1; srvfdfile = nil; ARGBEGIN{ case 'd': dbg++; break; case 'f': dbfile = EARGF(usage()); break; case 'm': messagesize = strtoul(EARGF(usage()), nil, 0); break; case 'r': srv = EARGF(usage()); break; case 's': srv = "/"; break; case 'F': /* accepted but ignored, for backwards compatibility */ break; case 'P': patternfile = EARGF(usage()); break; case 'R': readonly = 1; break; case 'S': if(srvfdfile != nil) usage(); srvfdfile = EARGF(usage()); break; default: usage(); }ARGEND USED(argc, argv); if(srvfdfile != nil){ if(srv != nil){ fprint(2, "exportfs: -S cannot be used with -r or -s\n"); usage(); } if((srvfd = open(srvfdfile, ORDWR)) < 0) fatal("open %s: %r", srvfdfile); } else if(srv == nil) usage(); exclusions(); if(dbg) { n = create(dbfile, OWRITE|OTRUNC, 0666); dup(n, DFD); close(n); } DEBUG(DFD, "exportfs: started\n"); rfork(RFNOTEG|RFREND); if(messagesize == 0){ messagesize = iounit(0); if(messagesize == 0) messagesize = 8192+IOHDRSZ; } fhash = emallocz(sizeof(Fid*)*FHASHSIZE); fmtinstall('F', fcallfmt); if(srvfd == -1) { if(chdir(srv) < 0) { char ebuf[ERRMAX]; ebuf[0] = '\0'; errstr(ebuf, sizeof ebuf); DEBUG(DFD, "chdir(\"%s\"): %s\n", srv, ebuf); mounterror(ebuf); } DEBUG(DFD, "invoked as server for %s", srv); } DEBUG(DFD, "\niniting root\n"); initroot(); io(); }