0f58e47551
exportfs -d logs 9p traffic to /tmp/exportdb. -f allows writing to a different file. exportfs silently continues if it doesn't have permissions to create or write to /tmp/exportdb. These are poor behaviors. A better default is to write to stderr, since it is 9P debug info that is better immediately printed, and not user info that is better handled by syslog(). As a result, -f is obsolete and thus removed. Redirect responsibility is now on rc. As a side effect, rc will fail if it doesn't have permissions to write. exportfs(4) is updated to reflect all changes and with a better Synopsis. oexportfs is changed to match exportfs. oexportfs(4) is updated to reflect all changes. The Synopsis is not changed due to the number of flags. Removed -f from iostats. iostats(4) is updated to reflect all changes. ---
107 lines
1.6 KiB
C
107 lines
1.6 KiB
C
#include <u.h>
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#include <libc.h>
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#include <fcall.h>
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#define Extern
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#include "exportfs.h"
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int srvfd = -1;
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int readonly;
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void
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usage(void)
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{
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fprint(2, "usage: %s [-dsR] [-m msize] [-r root] "
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"[-P patternfile] [-S srvfile]\n", argv0);
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fatal("usage");
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}
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void
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main(int argc, char **argv)
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{
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char *srv, *srvfdfile;
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srv = nil;
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srvfd = -1;
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srvfdfile = nil;
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ARGBEGIN{
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case 'd':
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dbg++;
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break;
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case 'm':
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messagesize = strtoul(EARGF(usage()), nil, 0);
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break;
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case 'r':
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srv = EARGF(usage());
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break;
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case 's':
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srv = "/";
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break;
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case 'F':
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/* accepted but ignored, for backwards compatibility */
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break;
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case 'P':
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patternfile = EARGF(usage());
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break;
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case 'R':
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readonly = 1;
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break;
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case 'S':
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if(srvfdfile != nil)
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usage();
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srvfdfile = EARGF(usage());
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break;
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default:
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usage();
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}ARGEND
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USED(argc, argv);
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if(srvfdfile != nil){
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if(srv != nil){
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fprint(2, "exportfs: -S cannot be used with -r or -s\n");
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usage();
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}
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if((srvfd = open(srvfdfile, ORDWR)) < 0)
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fatal("open %s: %r", srvfdfile);
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} else if(srv == nil)
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usage();
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exclusions();
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DEBUG(2, "exportfs: started\n");
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rfork(RFNOTEG|RFREND);
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if(messagesize == 0){
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messagesize = iounit(0);
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if(messagesize == 0)
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messagesize = 8192+IOHDRSZ;
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}
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fhash = emallocz(sizeof(Fid*)*FHASHSIZE);
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fmtinstall('F', fcallfmt);
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if(srvfd == -1) {
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if(chdir(srv) < 0) {
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char ebuf[ERRMAX];
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ebuf[0] = '\0';
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errstr(ebuf, sizeof ebuf);
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DEBUG(2, "chdir(\"%s\"): %s\n", srv, ebuf);
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mounterror(ebuf);
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}
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DEBUG(2, "invoked as server for %s", srv);
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}
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DEBUG(2, "\niniting root\n");
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initroot();
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io();
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}
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