1 f08fdedc 2003-11-23 devnull /*
  2 f08fdedc 2003-11-23 devnull  * Plan 9 versions of system-specific functions
  3 f08fdedc 2003-11-23 devnull  *	By convention, exported routines herein have names beginning with an
  4 f08fdedc 2003-11-23 devnull  *	upper case letter.
  5 f08fdedc 2003-11-23 devnull  */
  6 f08fdedc 2003-11-23 devnull #include "rc.h"
  7 f08fdedc 2003-11-23 devnull #include "exec.h"
  8 f08fdedc 2003-11-23 devnull #include "io.h"
  9 f08fdedc 2003-11-23 devnull #include "fns.h"
 10 f08fdedc 2003-11-23 devnull #include "getflags.h"
 11 f08fdedc 2003-11-23 devnull char *Signame[]={
 12 f08fdedc 2003-11-23 devnull 	"sigexit",	"sighup",	"sigint",	"sigquit",
 13 f08fdedc 2003-11-23 devnull 	"sigalrm",	"sigkill",	"sigfpe",	"sigterm",
 14 f08fdedc 2003-11-23 devnull 	0
 15 f08fdedc 2003-11-23 devnull };
 16 f08fdedc 2003-11-23 devnull char *syssigname[]={
 17 f08fdedc 2003-11-23 devnull 	"exit",		/* can't happen */
 18 f08fdedc 2003-11-23 devnull 	"hangup",
 19 f08fdedc 2003-11-23 devnull 	"interrupt",
 20 f08fdedc 2003-11-23 devnull 	"quit",		/* can't happen */
 21 f08fdedc 2003-11-23 devnull 	"alarm",
 22 f08fdedc 2003-11-23 devnull 	"kill",
 23 f08fdedc 2003-11-23 devnull 	"sys: fp: ",
 24 f08fdedc 2003-11-23 devnull 	"term",
 25 f08fdedc 2003-11-23 devnull 	0
 26 f08fdedc 2003-11-23 devnull };
 27 f08fdedc 2003-11-23 devnull char*
 28 f08fdedc 2003-11-23 devnull Rcmain(void)
 29 f08fdedc 2003-11-23 devnull {
 30 32f69c36 2003-12-11 devnull 	return "#9/rcmain";
 31 32f69c36 2003-12-11 devnull /*
 32 f08fdedc 2003-11-23 devnull 	static char buf[256];
 33 f08fdedc 2003-11-23 devnull 	char *root;
 34 f08fdedc 2003-11-23 devnull 
 35 f08fdedc 2003-11-23 devnull 	root = getenv("PLAN9");
 36 f08fdedc 2003-11-23 devnull 	if(root == nil)
 37 f08fdedc 2003-11-23 devnull 		root = "/usr/local/plan9";
 38 f08fdedc 2003-11-23 devnull 	snprint(buf, sizeof buf, "%s/rcmain", root);
 39 f08fdedc 2003-11-23 devnull 	return buf;
 40 32f69c36 2003-12-11 devnull */
 41 f08fdedc 2003-11-23 devnull }
 42 f08fdedc 2003-11-23 devnull 
 43 32f69c36 2003-12-11 devnull char Fdprefix[]="#d/";
 44 f08fdedc 2003-11-23 devnull void execfinit(void);
 45 f08fdedc 2003-11-23 devnull void execbind(void);
 46 f08fdedc 2003-11-23 devnull void execmount(void);
 47 f08fdedc 2003-11-23 devnull void execnewpgrp(void);
 48 f08fdedc 2003-11-23 devnull builtin Builtin[]={
 49 f08fdedc 2003-11-23 devnull 	"cd",		execcd,
 50 f08fdedc 2003-11-23 devnull 	"whatis",	execwhatis,
 51 f08fdedc 2003-11-23 devnull 	"eval",		execeval,
 52 f08fdedc 2003-11-23 devnull 	"exec",		execexec,	/* but with popword first */
 53 f08fdedc 2003-11-23 devnull 	"exit",		execexit,
 54 f08fdedc 2003-11-23 devnull 	"shift",	execshift,
 55 f08fdedc 2003-11-23 devnull 	"wait",		execwait,
 56 f08fdedc 2003-11-23 devnull 	".",		execdot,
 57 f08fdedc 2003-11-23 devnull 	"finit",	execfinit,
 58 f08fdedc 2003-11-23 devnull 	"flag",		execflag,
 59 f08fdedc 2003-11-23 devnull 	0
 60 f08fdedc 2003-11-23 devnull };
 61 f08fdedc 2003-11-23 devnull #define	SEP	'\1'
 62 f08fdedc 2003-11-23 devnull char **environp;
 63 f08fdedc 2003-11-23 devnull struct word *enval(s)
 64 f08fdedc 2003-11-23 devnull register char *s;
 65 f08fdedc 2003-11-23 devnull {
 66 f08fdedc 2003-11-23 devnull 	register char *t, c;
 67 f08fdedc 2003-11-23 devnull 	register struct word *v;
 68 f08fdedc 2003-11-23 devnull 	for(t=s;*t && *t!=SEP;t++);
 69 f08fdedc 2003-11-23 devnull 	c=*t;
 70 f08fdedc 2003-11-23 devnull 	*t='\0';
 71 f08fdedc 2003-11-23 devnull 	v=newword(s, c=='\0'?(struct word *)0:enval(t+1));
 72 f08fdedc 2003-11-23 devnull 	*t=c;
 73 f08fdedc 2003-11-23 devnull 	return v;
 74 f08fdedc 2003-11-23 devnull }
 75 f08fdedc 2003-11-23 devnull void Vinit(void){
 76 f08fdedc 2003-11-23 devnull 	extern char **environ;
 77 f08fdedc 2003-11-23 devnull 	register char *s;
 78 f08fdedc 2003-11-23 devnull 	register char **env=environ;
 79 f08fdedc 2003-11-23 devnull 	environp=env;
 80 f08fdedc 2003-11-23 devnull 	for(;*env;env++){
 81 f08fdedc 2003-11-23 devnull 		for(s=*env;*s && *s!='(' && *s!='=';s++);
 82 f08fdedc 2003-11-23 devnull 		switch(*s){
 83 f08fdedc 2003-11-23 devnull 		case '\0':
 84 f08fdedc 2003-11-23 devnull 			pfmt(err, "environment %q?\n", *env);
 85 f08fdedc 2003-11-23 devnull 			break;
 86 f08fdedc 2003-11-23 devnull 		case '=':
 87 f08fdedc 2003-11-23 devnull 			*s='\0';
 88 f08fdedc 2003-11-23 devnull 			setvar(*env, enval(s+1));
 89 f08fdedc 2003-11-23 devnull 			*s='=';
 90 f08fdedc 2003-11-23 devnull 			break;
 91 f08fdedc 2003-11-23 devnull 		case '(':	/* ignore functions for now */
 92 f08fdedc 2003-11-23 devnull 			break;
 93 f08fdedc 2003-11-23 devnull 		}
 94 f08fdedc 2003-11-23 devnull 	}
 95 f08fdedc 2003-11-23 devnull }
 96 f08fdedc 2003-11-23 devnull char **envp;
 97 f08fdedc 2003-11-23 devnull void Xrdfn(void){
 98 f08fdedc 2003-11-23 devnull 	char *p;
 99 f08fdedc 2003-11-23 devnull 	register char *s;
100 f08fdedc 2003-11-23 devnull 	register int len;
101 f08fdedc 2003-11-23 devnull 	for(;*envp;envp++){
102 f08fdedc 2003-11-23 devnull 		s = *envp;
103 f08fdedc 2003-11-23 devnull 		if(strncmp(s, "fn#", 3) == 0){
104 f08fdedc 2003-11-23 devnull 			p = strchr(s, '=');
105 f08fdedc 2003-11-23 devnull 			if(p == nil)
106 f08fdedc 2003-11-23 devnull 				continue;
107 f08fdedc 2003-11-23 devnull 			*p = ' ';
108 f08fdedc 2003-11-23 devnull 			s[2] = ' ';
109 f08fdedc 2003-11-23 devnull 			len = strlen(s);
110 f08fdedc 2003-11-23 devnull 			execcmds(opencore(s, len));
111 f08fdedc 2003-11-23 devnull 			s[len] = '\0';
112 f08fdedc 2003-11-23 devnull 			return;
113 f08fdedc 2003-11-23 devnull 		}
114 f08fdedc 2003-11-23 devnull #if 0
115 f08fdedc 2003-11-23 devnull 		for(s=*envp;*s && *s!='(' && *s!='=';s++);
116 f08fdedc 2003-11-23 devnull 		switch(*s){
117 f08fdedc 2003-11-23 devnull 		case '\0':
118 f08fdedc 2003-11-23 devnull 			pfmt(err, "environment %q?\n", *envp);
119 f08fdedc 2003-11-23 devnull 			break;
120 f08fdedc 2003-11-23 devnull 		case '=':	/* ignore variables */
121 f08fdedc 2003-11-23 devnull 			break;
122 f08fdedc 2003-11-23 devnull 		case '(':		/* Bourne again */
123 f08fdedc 2003-11-23 devnull 			s=*envp+3;
124 f08fdedc 2003-11-23 devnull 			envp++;
125 f08fdedc 2003-11-23 devnull 			len=strlen(s);
126 f08fdedc 2003-11-23 devnull 			s[len]='\n';
127 f08fdedc 2003-11-23 devnull 			execcmds(opencore(s, len+1));
128 f08fdedc 2003-11-23 devnull 			s[len]='\0';
129 f08fdedc 2003-11-23 devnull 			return;
130 f08fdedc 2003-11-23 devnull 		}
131 f08fdedc 2003-11-23 devnull #endif
132 f08fdedc 2003-11-23 devnull 	}
133 f08fdedc 2003-11-23 devnull 	Xreturn();
134 f08fdedc 2003-11-23 devnull }
135 f08fdedc 2003-11-23 devnull union code rdfns[4];
136 f08fdedc 2003-11-23 devnull void execfinit(void){
137 f08fdedc 2003-11-23 devnull 	static int first=1;
138 f08fdedc 2003-11-23 devnull 	if(first){
139 f08fdedc 2003-11-23 devnull 		rdfns[0].i=1;
140 f08fdedc 2003-11-23 devnull 		rdfns[1].f=Xrdfn;
141 f08fdedc 2003-11-23 devnull 		rdfns[2].f=Xjump;
142 f08fdedc 2003-11-23 devnull 		rdfns[3].i=1;
143 f08fdedc 2003-11-23 devnull 		first=0;
144 f08fdedc 2003-11-23 devnull 	}
145 f08fdedc 2003-11-23 devnull 	Xpopm();
146 f08fdedc 2003-11-23 devnull 	envp=environp;
147 f08fdedc 2003-11-23 devnull 	start(rdfns, 1, runq->local);
148 f08fdedc 2003-11-23 devnull }
149 f08fdedc 2003-11-23 devnull int Waitfor(int pid, int unused0){
150 f08fdedc 2003-11-23 devnull 	thread *p;
151 f08fdedc 2003-11-23 devnull 	Waitmsg *w;
152 f08fdedc 2003-11-23 devnull 	char errbuf[ERRMAX];
153 f08fdedc 2003-11-23 devnull 
154 f08fdedc 2003-11-23 devnull 	while((w = wait()) != nil){
155 f08fdedc 2003-11-23 devnull 		if(w->pid==pid){
156 f08fdedc 2003-11-23 devnull 			setstatus(w->msg);
157 f08fdedc 2003-11-23 devnull 			free(w);
158 f08fdedc 2003-11-23 devnull 			return 0;
159 f08fdedc 2003-11-23 devnull 		}
160 f08fdedc 2003-11-23 devnull 		for(p=runq->ret;p;p=p->ret)
161 f08fdedc 2003-11-23 devnull 			if(p->pid==w->pid){
162 f08fdedc 2003-11-23 devnull 				p->pid=-1;
163 f08fdedc 2003-11-23 devnull 				strcpy(p->status, w->msg);
164 f08fdedc 2003-11-23 devnull 			}
165 f08fdedc 2003-11-23 devnull 		free(w);
166 f08fdedc 2003-11-23 devnull 	}
167 f08fdedc 2003-11-23 devnull 
168 f08fdedc 2003-11-23 devnull 	errstr(errbuf, sizeof errbuf);
169 f08fdedc 2003-11-23 devnull 	if(strcmp(errbuf, "interrupted")==0) return -1;
170 f08fdedc 2003-11-23 devnull 	return 0;
171 f08fdedc 2003-11-23 devnull }
172 f08fdedc 2003-11-23 devnull char **mkargv(word *a)
173 f08fdedc 2003-11-23 devnull {
174 f08fdedc 2003-11-23 devnull 	char **argv=(char **)emalloc((count(a)+2)*sizeof(char *));
175 f08fdedc 2003-11-23 devnull 	char **argp=argv+1;	/* leave one at front for runcoms */
176 f08fdedc 2003-11-23 devnull 	for(;a;a=a->next) *argp++=a->word;
177 f08fdedc 2003-11-23 devnull 	*argp=0;
178 f08fdedc 2003-11-23 devnull 	return argv;
179 f08fdedc 2003-11-23 devnull }
180 f08fdedc 2003-11-23 devnull /*
181 f08fdedc 2003-11-23 devnull void addenv(var *v)
182 f08fdedc 2003-11-23 devnull {
183 f08fdedc 2003-11-23 devnull 	char envname[256];
184 f08fdedc 2003-11-23 devnull 	word *w;
185 f08fdedc 2003-11-23 devnull 	int f;
186 f08fdedc 2003-11-23 devnull 	io *fd;
187 f08fdedc 2003-11-23 devnull 	if(v->changed){
188 f08fdedc 2003-11-23 devnull 		v->changed=0;
189 f08fdedc 2003-11-23 devnull 		snprint(envname, sizeof envname, "/env/%s", v->name);
190 f08fdedc 2003-11-23 devnull 		if((f=Creat(envname))<0)
191 f08fdedc 2003-11-23 devnull 			pfmt(err, "rc: can't open %s: %r\n", envname);
192 f08fdedc 2003-11-23 devnull 		else{
193 f08fdedc 2003-11-23 devnull 			for(w=v->val;w;w=w->next)
194 f08fdedc 2003-11-23 devnull 				write(f, w->word, strlen(w->word)+1L);
195 f08fdedc 2003-11-23 devnull 			close(f);
196 f08fdedc 2003-11-23 devnull 		}
197 f08fdedc 2003-11-23 devnull 	}
198 f08fdedc 2003-11-23 devnull 	if(v->fnchanged){
199 f08fdedc 2003-11-23 devnull 		v->fnchanged=0;
200 f08fdedc 2003-11-23 devnull 		snprint(envname, sizeof envname, "/env/fn#%s", v->name);
201 f08fdedc 2003-11-23 devnull 		if((f=Creat(envname))<0)
202 f08fdedc 2003-11-23 devnull 			pfmt(err, "rc: can't open %s: %r\n", envname);
203 f08fdedc 2003-11-23 devnull 		else{
204 f08fdedc 2003-11-23 devnull 			if(v->fn){
205 f08fdedc 2003-11-23 devnull 				fd=openfd(f);
206 f08fdedc 2003-11-23 devnull 				pfmt(fd, "fn %s %s\n", v->name, v->fn[v->pc-1].s);
207 f08fdedc 2003-11-23 devnull 				closeio(fd);
208 f08fdedc 2003-11-23 devnull 			}
209 f08fdedc 2003-11-23 devnull 			close(f);
210 f08fdedc 2003-11-23 devnull 		}
211 f08fdedc 2003-11-23 devnull 	}
212 f08fdedc 2003-11-23 devnull }
213 f08fdedc 2003-11-23 devnull void updenvlocal(var *v)
214 f08fdedc 2003-11-23 devnull {
215 f08fdedc 2003-11-23 devnull 	if(v){
216 f08fdedc 2003-11-23 devnull 		updenvlocal(v->next);
217 f08fdedc 2003-11-23 devnull 		addenv(v);
218 f08fdedc 2003-11-23 devnull 	}
219 f08fdedc 2003-11-23 devnull }
220 f08fdedc 2003-11-23 devnull void Updenv(void){
221 f08fdedc 2003-11-23 devnull 	var *v, **h;
222 f08fdedc 2003-11-23 devnull 	for(h=gvar;h!=&gvar[NVAR];h++)
223 f08fdedc 2003-11-23 devnull 		for(v=*h;v;v=v->next)
224 f08fdedc 2003-11-23 devnull 			addenv(v);
225 f08fdedc 2003-11-23 devnull 	if(runq) updenvlocal(runq->local);
226 f08fdedc 2003-11-23 devnull }
227 f08fdedc 2003-11-23 devnull */
228 f08fdedc 2003-11-23 devnull int
229 f08fdedc 2003-11-23 devnull cmpenv(a, b)
230 f08fdedc 2003-11-23 devnull char **a, **b;
231 f08fdedc 2003-11-23 devnull {
232 f08fdedc 2003-11-23 devnull 	return strcmp(*a, *b);
233 f08fdedc 2003-11-23 devnull }
234 f08fdedc 2003-11-23 devnull char **mkenv(){
235 f08fdedc 2003-11-23 devnull 	register char **env, **ep, *p, *q;
236 f08fdedc 2003-11-23 devnull 	register struct var **h, *v;
237 f08fdedc 2003-11-23 devnull 	register struct word *a;
238 f08fdedc 2003-11-23 devnull 	register int nvar=0, nchr=0, sep;
239 f08fdedc 2003-11-23 devnull 	/*
240 f08fdedc 2003-11-23 devnull 	 * Slightly kludgy loops look at locals then globals
241 f08fdedc 2003-11-23 devnull 	 */
242 f08fdedc 2003-11-23 devnull 	for(h=gvar-1;h!=&gvar[NVAR];h++) for(v=h>=gvar?*h:runq->local;v;v=v->next){
243 f08fdedc 2003-11-23 devnull 		if((v==vlook(v->name)) && v->val){
244 f08fdedc 2003-11-23 devnull 			nvar++;
245 f08fdedc 2003-11-23 devnull 			nchr+=strlen(v->name)+1;
246 f08fdedc 2003-11-23 devnull 			for(a=v->val;a;a=a->next)
247 f08fdedc 2003-11-23 devnull 				nchr+=strlen(a->word)+1;
248 f08fdedc 2003-11-23 devnull 		}
249 f08fdedc 2003-11-23 devnull 		if(v->fn){
250 f08fdedc 2003-11-23 devnull 			nvar++;
251 f08fdedc 2003-11-23 devnull 			nchr+=strlen(v->name)+strlen(v->fn[v->pc-1].s)+8;
252 f08fdedc 2003-11-23 devnull 		}
253 f08fdedc 2003-11-23 devnull 	}
254 f08fdedc 2003-11-23 devnull 	env=(char **)emalloc((nvar+1)*sizeof(char *)+nchr);
255 f08fdedc 2003-11-23 devnull 	ep=env;
256 f08fdedc 2003-11-23 devnull 	p=(char *)&env[nvar+1];
257 f08fdedc 2003-11-23 devnull 	for(h=gvar-1;h!=&gvar[NVAR];h++) for(v=h>=gvar?*h:runq->local;v;v=v->next){
258 f08fdedc 2003-11-23 devnull 		if((v==vlook(v->name)) && v->val){
259 f08fdedc 2003-11-23 devnull 			*ep++=p;
260 f08fdedc 2003-11-23 devnull 			q=v->name;
261 f08fdedc 2003-11-23 devnull 			while(*q) *p++=*q++;
262 f08fdedc 2003-11-23 devnull 			sep='=';
263 f08fdedc 2003-11-23 devnull 			for(a=v->val;a;a=a->next){
264 f08fdedc 2003-11-23 devnull 				*p++=sep;
265 f08fdedc 2003-11-23 devnull 				sep=SEP;
266 f08fdedc 2003-11-23 devnull 				q=a->word;
267 f08fdedc 2003-11-23 devnull 				while(*q) *p++=*q++;
268 f08fdedc 2003-11-23 devnull 			}
269 f08fdedc 2003-11-23 devnull 			*p++='\0';
270 f08fdedc 2003-11-23 devnull 		}
271 f08fdedc 2003-11-23 devnull 		if(v->fn){
272 f08fdedc 2003-11-23 devnull 			*ep++=p;
273 f08fdedc 2003-11-23 devnull #if 0
274 f08fdedc 2003-11-23 devnull 			*p++='#'; *p++='('; *p++=')';	/* to fool Bourne */
275 f08fdedc 2003-11-23 devnull 			*p++='f'; *p++='n'; *p++=' ';
276 f08fdedc 2003-11-23 devnull 			q=v->name;
277 f08fdedc 2003-11-23 devnull 			while(*q) *p++=*q++;
278 f08fdedc 2003-11-23 devnull 			*p++=' ';
279 f08fdedc 2003-11-23 devnull #endif
280 f08fdedc 2003-11-23 devnull 			*p++='f'; *p++='n'; *p++='#';
281 f08fdedc 2003-11-23 devnull 			q=v->name;
282 f08fdedc 2003-11-23 devnull 			while(*q) *p++=*q++;
283 f08fdedc 2003-11-23 devnull 			*p++='=';
284 f08fdedc 2003-11-23 devnull 			q=v->fn[v->pc-1].s;
285 f08fdedc 2003-11-23 devnull 			while(*q) *p++=*q++;
286 f08fdedc 2003-11-23 devnull 			*p++='\n';
287 f08fdedc 2003-11-23 devnull 			*p++='\0';
288 f08fdedc 2003-11-23 devnull 		}
289 f08fdedc 2003-11-23 devnull 	}
290 f08fdedc 2003-11-23 devnull 	*ep=0;
291 f08fdedc 2003-11-23 devnull 	qsort((char *)env, nvar, sizeof ep[0], cmpenv);
292 f08fdedc 2003-11-23 devnull 	return env;	
293 f08fdedc 2003-11-23 devnull }
294 f08fdedc 2003-11-23 devnull void Updenv(void){}
295 f08fdedc 2003-11-23 devnull void Execute(word *args, word *path)
296 f08fdedc 2003-11-23 devnull {
297 f08fdedc 2003-11-23 devnull 	char **argv=mkargv(args);
298 f08fdedc 2003-11-23 devnull 	char **env=mkenv();
299 f08fdedc 2003-11-23 devnull 	char file[1024];
300 f08fdedc 2003-11-23 devnull 	int nc;
301 f08fdedc 2003-11-23 devnull 	Updenv();
302 f08fdedc 2003-11-23 devnull 	for(;path;path=path->next){
303 f08fdedc 2003-11-23 devnull 		nc=strlen(path->word);
304 f08fdedc 2003-11-23 devnull 		if(nc<1024){
305 f08fdedc 2003-11-23 devnull 			strcpy(file, path->word);
306 f08fdedc 2003-11-23 devnull 			if(file[0]){
307 f08fdedc 2003-11-23 devnull 				strcat(file, "/");
308 f08fdedc 2003-11-23 devnull 				nc++;
309 f08fdedc 2003-11-23 devnull 			}
310 f08fdedc 2003-11-23 devnull 			if(nc+strlen(argv[1])<1024){
311 f08fdedc 2003-11-23 devnull 				strcat(file, argv[1]);
312 f08fdedc 2003-11-23 devnull 				execve(file, argv+1, env);
313 f08fdedc 2003-11-23 devnull 			}
314 f08fdedc 2003-11-23 devnull 			else werrstr("command name too long");
315 f08fdedc 2003-11-23 devnull 		}
316 f08fdedc 2003-11-23 devnull 	}
317 f08fdedc 2003-11-23 devnull 	rerrstr(file, sizeof file);
318 f08fdedc 2003-11-23 devnull 	pfmt(err, "%s: %s\n", argv[1], file);
319 f08fdedc 2003-11-23 devnull 	efree((char *)argv);
320 f08fdedc 2003-11-23 devnull }
321 f08fdedc 2003-11-23 devnull #define	NDIR	256		/* shoud be a better way */
322 f08fdedc 2003-11-23 devnull int Globsize(char *p)
323 f08fdedc 2003-11-23 devnull {
324 f08fdedc 2003-11-23 devnull 	ulong isglob=0, globlen=NDIR+1;
325 f08fdedc 2003-11-23 devnull 	for(;*p;p++){
326 f08fdedc 2003-11-23 devnull 		if(*p==GLOB){
327 f08fdedc 2003-11-23 devnull 			p++;
328 f08fdedc 2003-11-23 devnull 			if(*p!=GLOB) isglob++;
329 f08fdedc 2003-11-23 devnull 			globlen+=*p=='*'?NDIR:1;
330 f08fdedc 2003-11-23 devnull 		}
331 f08fdedc 2003-11-23 devnull 		else
332 f08fdedc 2003-11-23 devnull 			globlen++;
333 f08fdedc 2003-11-23 devnull 	}
334 f08fdedc 2003-11-23 devnull 	return isglob?globlen:0;
335 f08fdedc 2003-11-23 devnull }
336 f08fdedc 2003-11-23 devnull #define	NFD	50
337 f08fdedc 2003-11-23 devnull #define	NDBUF	32
338 f08fdedc 2003-11-23 devnull struct{
339 f08fdedc 2003-11-23 devnull 	Dir	*dbuf;
340 f08fdedc 2003-11-23 devnull 	int	i;
341 f08fdedc 2003-11-23 devnull 	int	n;
342 f08fdedc 2003-11-23 devnull }dir[NFD];
343 f08fdedc 2003-11-23 devnull int Opendir(char *name)
344 f08fdedc 2003-11-23 devnull {
345 f08fdedc 2003-11-23 devnull 	Dir *db;
346 f08fdedc 2003-11-23 devnull 	int f;
347 f08fdedc 2003-11-23 devnull 	f=open(name, 0);
348 f08fdedc 2003-11-23 devnull 	if(f==-1)
349 f08fdedc 2003-11-23 devnull 		return f;
350 f08fdedc 2003-11-23 devnull 	db = dirfstat(f);
351 f08fdedc 2003-11-23 devnull 	if(db!=nil && (db->mode&DMDIR)){
352 f08fdedc 2003-11-23 devnull 		if(f<NFD){
353 f08fdedc 2003-11-23 devnull 			dir[f].i=0;
354 f08fdedc 2003-11-23 devnull 			dir[f].n=0;
355 f08fdedc 2003-11-23 devnull 		}
356 f08fdedc 2003-11-23 devnull 		free(db);
357 f08fdedc 2003-11-23 devnull 		return f;
358 f08fdedc 2003-11-23 devnull 	}
359 f08fdedc 2003-11-23 devnull 	free(db);
360 f08fdedc 2003-11-23 devnull 	close(f);
361 f08fdedc 2003-11-23 devnull 	return -1;
362 f08fdedc 2003-11-23 devnull }
363 f08fdedc 2003-11-23 devnull int Readdir(int f, char *p)
364 f08fdedc 2003-11-23 devnull {
365 f08fdedc 2003-11-23 devnull 	int n;
366 f08fdedc 2003-11-23 devnull 	if(f<0 || f>=NFD)
367 f08fdedc 2003-11-23 devnull 		return 0;
368 f08fdedc 2003-11-23 devnull 	if(dir[f].i==dir[f].n){	/* read */
369 f08fdedc 2003-11-23 devnull 		free(dir[f].dbuf);
370 f08fdedc 2003-11-23 devnull 		dir[f].dbuf=0;
371 f08fdedc 2003-11-23 devnull 		n=dirread(f, &dir[f].dbuf);
372 f08fdedc 2003-11-23 devnull 		if(n>=0)
373 f08fdedc 2003-11-23 devnull 			dir[f].n=n;
374 f08fdedc 2003-11-23 devnull 		else
375 f08fdedc 2003-11-23 devnull 			dir[f].n=0;
376 f08fdedc 2003-11-23 devnull 		dir[f].i=0;
377 f08fdedc 2003-11-23 devnull 	}
378 f08fdedc 2003-11-23 devnull 	if(dir[f].i==dir[f].n)
379 f08fdedc 2003-11-23 devnull 		return 0;
380 f08fdedc 2003-11-23 devnull 	strcpy(p, dir[f].dbuf[dir[f].i].name);
381 f08fdedc 2003-11-23 devnull 	dir[f].i++;
382 f08fdedc 2003-11-23 devnull 	return 1;
383 f08fdedc 2003-11-23 devnull }
384 f08fdedc 2003-11-23 devnull void Closedir(int f){
385 f08fdedc 2003-11-23 devnull 	if(f>=0 && f<NFD){
386 f08fdedc 2003-11-23 devnull 		free(dir[f].dbuf);
387 f08fdedc 2003-11-23 devnull 		dir[f].i=0;
388 f08fdedc 2003-11-23 devnull 		dir[f].n=0;
389 f08fdedc 2003-11-23 devnull 		dir[f].dbuf=0;
390 f08fdedc 2003-11-23 devnull 	}
391 f08fdedc 2003-11-23 devnull 	close(f);
392 f08fdedc 2003-11-23 devnull }
393 f08fdedc 2003-11-23 devnull int interrupted = 0;
394 f08fdedc 2003-11-23 devnull void
395 f08fdedc 2003-11-23 devnull notifyf(void *unused0, char *s)
396 f08fdedc 2003-11-23 devnull {
397 f08fdedc 2003-11-23 devnull 	int i;
398 669250d1 2003-12-03 devnull 	for(i=0;syssigname[i];i++)
399 669250d1 2003-12-03 devnull 		if(strncmp(s, syssigname[i], strlen(syssigname[i]))==0){
400 669250d1 2003-12-03 devnull 			if(strncmp(s, "sys: ", 5)!=0) interrupted=1;
401 669250d1 2003-12-03 devnull 			goto Out;
402 669250d1 2003-12-03 devnull 		}
403 0b917997 2004-03-04 devnull 	if(strcmp(s, "sys: child") != 0)
404 0b917997 2004-03-04 devnull 		pfmt(err, "rc: note: %s\n", s);
405 f08fdedc 2003-11-23 devnull 	noted(NDFLT);
406 f08fdedc 2003-11-23 devnull 	return;
407 f08fdedc 2003-11-23 devnull Out:
408 f08fdedc 2003-11-23 devnull 	if(strcmp(s, "interrupt")!=0 || trap[i]==0){
409 f08fdedc 2003-11-23 devnull 		trap[i]++;
410 f08fdedc 2003-11-23 devnull 		ntrap++;
411 f08fdedc 2003-11-23 devnull 	}
412 f08fdedc 2003-11-23 devnull 	if(ntrap>=32){	/* rc is probably in a trap loop */
413 f08fdedc 2003-11-23 devnull 		pfmt(err, "rc: Too many traps (trap %s), aborting\n", s);
414 f08fdedc 2003-11-23 devnull 		abort();
415 f08fdedc 2003-11-23 devnull 	}
416 f08fdedc 2003-11-23 devnull 	noted(NCONT);
417 f08fdedc 2003-11-23 devnull }
418 f08fdedc 2003-11-23 devnull void Trapinit(void){
419 f08fdedc 2003-11-23 devnull 	notify(notifyf);
420 f08fdedc 2003-11-23 devnull }
421 f08fdedc 2003-11-23 devnull void Unlink(char *name)
422 f08fdedc 2003-11-23 devnull {
423 f08fdedc 2003-11-23 devnull 	remove(name);
424 f08fdedc 2003-11-23 devnull }
425 f08fdedc 2003-11-23 devnull long Write(int fd, char *buf, long cnt)
426 f08fdedc 2003-11-23 devnull {
427 f08fdedc 2003-11-23 devnull 	return write(fd, buf, (long)cnt);
428 f08fdedc 2003-11-23 devnull }
429 f08fdedc 2003-11-23 devnull long Read(int fd, char *buf, long cnt)
430 f08fdedc 2003-11-23 devnull {
431 669250d1 2003-12-03 devnull 	int i;
432 669250d1 2003-12-03 devnull 
433 669250d1 2003-12-03 devnull 	i = read(fd, buf, cnt);
434 669250d1 2003-12-03 devnull 	if(ntrap) dotrap();
435 669250d1 2003-12-03 devnull 	return i;
436 f08fdedc 2003-11-23 devnull }
437 f08fdedc 2003-11-23 devnull long Seek(int fd, long cnt, long whence)
438 f08fdedc 2003-11-23 devnull {
439 f08fdedc 2003-11-23 devnull 	return seek(fd, cnt, whence);
440 f08fdedc 2003-11-23 devnull }
441 f08fdedc 2003-11-23 devnull int Executable(char *file)
442 f08fdedc 2003-11-23 devnull {
443 f08fdedc 2003-11-23 devnull 	Dir *statbuf;
444 f08fdedc 2003-11-23 devnull 	int ret;
445 f08fdedc 2003-11-23 devnull 
446 f08fdedc 2003-11-23 devnull 	statbuf = dirstat(file);
447 f08fdedc 2003-11-23 devnull 	if(statbuf == nil) return 0;
448 f08fdedc 2003-11-23 devnull 	ret = ((statbuf->mode&0111)!=0 && (statbuf->mode&DMDIR)==0);
449 f08fdedc 2003-11-23 devnull 	free(statbuf);
450 f08fdedc 2003-11-23 devnull 	return ret;
451 f08fdedc 2003-11-23 devnull }
452 f08fdedc 2003-11-23 devnull int Creat(char *file)
453 f08fdedc 2003-11-23 devnull {
454 f08fdedc 2003-11-23 devnull 	return create(file, 1, 0666L);
455 f08fdedc 2003-11-23 devnull }
456 f08fdedc 2003-11-23 devnull int Dup(int a, int b){
457 f08fdedc 2003-11-23 devnull 	return dup(a, b);
458 f08fdedc 2003-11-23 devnull }
459 f08fdedc 2003-11-23 devnull int Dup1(int unused0){
460 f08fdedc 2003-11-23 devnull 	return -1;
461 f08fdedc 2003-11-23 devnull }
462 f08fdedc 2003-11-23 devnull void Exit(char *stat)
463 f08fdedc 2003-11-23 devnull {
464 f08fdedc 2003-11-23 devnull 	Updenv();
465 f08fdedc 2003-11-23 devnull 	setstatus(stat);
466 f08fdedc 2003-11-23 devnull 	exits(truestatus()?"":getstatus());
467 f08fdedc 2003-11-23 devnull }
468 f08fdedc 2003-11-23 devnull int Eintr(void){
469 f08fdedc 2003-11-23 devnull 	return interrupted;
470 f08fdedc 2003-11-23 devnull }
471 f08fdedc 2003-11-23 devnull void Noerror(void){
472 f08fdedc 2003-11-23 devnull 	interrupted=0;
473 f08fdedc 2003-11-23 devnull }
474 f08fdedc 2003-11-23 devnull int
475 f08fdedc 2003-11-23 devnull Isatty(fd){
476 f08fdedc 2003-11-23 devnull 	return isatty(fd);
477 f08fdedc 2003-11-23 devnull }
478 f08fdedc 2003-11-23 devnull void Abort(void){
479 f08fdedc 2003-11-23 devnull 	pfmt(err, "aborting\n");
480 f08fdedc 2003-11-23 devnull 	flush(err);
481 f08fdedc 2003-11-23 devnull 	Exit("aborting");
482 f08fdedc 2003-11-23 devnull }
483 f08fdedc 2003-11-23 devnull void Memcpy(char *a, char *b, long n)
484 f08fdedc 2003-11-23 devnull {
485 f08fdedc 2003-11-23 devnull 	memmove(a, b, (long)n);
486 f08fdedc 2003-11-23 devnull }
487 f08fdedc 2003-11-23 devnull void *Malloc(ulong n){
488 f08fdedc 2003-11-23 devnull 	return malloc(n);
489 f08fdedc 2003-11-23 devnull }