2 * Plan 9 versions of system-specific functions
3 * By convention, exported routines herein have names beginning with an
13 Maxenvname = 128, /* undocumented limit */
17 "sigexit", "sighup", "sigint", "sigquit",
18 "sigalrm", "sigkill", "sigfpe", "sigterm",
21 char *syssigname[] = {
22 "exit", /* can't happen */
25 "quit", /* can't happen */
32 char Rcmain[]="/rc/lib/rcmain";
33 char Fdprefix[]="/fd/";
37 void execnewpgrp(void);
42 "exec", execexec, /* but with popword first */
58 switch(count(runq->argv->words)){
60 arg = RFENVG|RFNAMEG|RFNOTEG;
64 for(s = runq->argv->words->next->word;*s;s++) switch(*s){
88 pfmt(err, "Usage: %s [fnesFNEm]\n", runq->argv->words->word);
89 setstatus("rfork usage");
94 pfmt(err, "rc: %s failed\n", runq->argv->words->word);
95 setstatus("rfork failed");
99 for(rp = runq->redir; rp; rp = rp->next)
110 int dir, f, len, i, n, nent;
112 char envname[Maxenvname];
116 dir = open("/env", OREAD);
118 pfmt(err, "rc: can't open /env: %r\n");
123 nent = dirread(dir, &ent);
126 for(i = 0; i<nent; i++){
128 if(len && strncmp(ent[i].name, "fn#", 3)!=0){
129 snprint(envname, sizeof envname, "/env/%s", ent[i].name);
130 if((f = open(envname, 0))>=0){
131 buf = emalloc(len+1);
132 n = readn(f, buf, len);
138 /* Charitably add a 0 at the end if need be */
143 while(s!=buf && s[-1]!='\0') --s;
144 val = newword(s, val);
149 setvar(ent[i].name, val);
150 vlook(ent[i].name)->changed = 0;
164 if(runq->argv->words == 0)
167 int f = open(runq->argv->words->word, 0);
170 if(f>=0) execcmds(openfd(f));
178 static int first = 1;
183 rdfns[4].i = Globsize(rdfns[3].s = "/env/fn#\001*");
186 rdfns[7].f = Xreturn;
190 start(rdfns, 1, runq->local);
194 Waitfor(int pid, int)
200 if(pid >= 0 && !havewaitpid(pid))
203 while((w = wait()) != nil){
210 for(p = runq->ret;p;p = p->ret)
213 strcpy(p->status, w->msg);
218 errstr(errbuf, sizeof errbuf);
219 if(strcmp(errbuf, "interrupted")==0) return -1;
226 char **argv = (char **)emalloc((count(a)+2)*sizeof(char *));
227 char **argp = argv+1; /* leave one at front for runcoms */
228 for(;a;a = a->next) *argp++=a->word;
236 char envname[Maxenvname];
242 snprint(envname, sizeof envname, "/env/%s", v->name);
243 if((f = Creat(envname))<0)
244 pfmt(err, "rc: can't open %s: %r\n", envname);
246 for(w = v->val;w;w = w->next)
247 write(f, w->word, strlen(w->word)+1L);
253 snprint(envname, sizeof envname, "/env/fn#%s", v->name);
254 if((f = Creat(envname))<0)
255 pfmt(err, "rc: can't open %s: %r\n", envname);
259 pfmt(fd, "fn %q %s\n", v->name, v->fn[v->pc-1].s);
269 updenvlocal(v->next);
278 for(h = gvar;h!=&gvar[NVAR];h++)
279 for(v=*h;v;v = v->next)
282 updenvlocal(runq->local);
285 /* not used on plan 9 */
287 ForkExecute(char *, char **, int, int, int)
293 Execute(word *args, word *path)
295 char **argv = mkargv(args);
300 mc = strlen(argv[1])+1;
301 for(;path;path = path->next){
302 nc = strlen(path->word);
303 if(nc + mc >= sizeof file - 1){ /* 1 for / */
304 werrstr("command path name too long");
308 memmove(file, path->word, nc);
311 memmove(file+nc, argv[1], mc);
314 rerrstr(file, sizeof file);
316 pfmt(err, "%s: %s\n", argv[1], file);
319 #define NDIR 256 /* shoud be a better way */
324 int isglob = 0, globlen = NDIR+1;
330 globlen+=*p=='*'?NDIR:1;
335 return isglob?globlen:0;
354 if(db!=nil && (db->mode&DMDIR)){
368 trimdirs(Dir *d, int nd)
372 for(r=w=0; r<nd; r++)
379 * onlydirs is advisory -- it means you only
380 * need to return the directories. it's okay to
381 * return files too (e.g., on unix where you can't
382 * tell during the readdir), but that just makes
383 * the globber work harder.
386 Readdir(int f, void *p, int onlydirs)
393 if(dir[f].i==dir[f].n){ /* read */
396 n = dirread(f, &dir[f].dbuf);
399 n = trimdirs(dir[f].dbuf, n);
408 if(dir[f].i == dir[f].n)
410 strncpy((char*)p, dir[f].dbuf[dir[f].i].name, NDIR);
428 notifyf(void*, char *s)
431 for(i = 0;syssigname[i];i++) if(strncmp(s, syssigname[i], strlen(syssigname[i]))==0){
432 if(strncmp(s, "sys: ", 5)!=0) interrupted = 1;
435 pfmt(err, "rc: note: %s\n", s);
439 if(strcmp(s, "interrupt")!=0 || trap[i]==0){
443 if(ntrap>=32){ /* rc is probably in a trap loop */
444 pfmt(err, "rc: Too many traps (trap %s), aborting\n", s);
463 Write(int fd, void *buf, long cnt)
465 return write(fd, buf, cnt);
469 Read(int fd, void *buf, long cnt)
471 return read(fd, buf, cnt);
475 Seek(int fd, long cnt, long whence)
477 return seek(fd, cnt, whence);
481 Executable(char *file)
486 statbuf = dirstat(file);
489 ret = ((statbuf->mode&0111)!=0 && (statbuf->mode&DMDIR)==0);
497 return create(file, 1, 0666L);
517 exits(truestatus()?"":getstatus());
537 if(fd2path(fd, buf, sizeof buf) != 0)
540 /* might be #c/cons during boot - fixed 22 april 2005, remove this later */
541 if(strcmp(buf, "#c/cons") == 0)
544 /* might be /mnt/term/dev/cons */
545 return strlen(buf) >= 9 && strcmp(buf+strlen(buf)-9, "/dev/cons") == 0;
551 pfmt(err, "aborting\n");
562 waitpids = erealloc(waitpids, (nwaitpids+1)*sizeof waitpids[0]);
563 waitpids[nwaitpids++] = pid;
571 for(r=w=0; r<nwaitpids; r++)
572 if(waitpids[r] != pid)
573 waitpids[w++] = waitpids[r];
588 for(i=0; i<nwaitpids; i++)
589 if(waitpids[i] == pid)
594 /* avoid loading any floating-point library code */