1 8f314994 2004-03-02 devnull #define NOPLAN9DEFINES
  2 76193d7c 2003-09-30 devnull #include	"mk.h"
  3 76193d7c 2003-09-30 devnull #include	<sys/wait.h>
  4 76193d7c 2003-09-30 devnull #include	<signal.h>
  5 76193d7c 2003-09-30 devnull #include	<sys/stat.h>
  6 76193d7c 2003-09-30 devnull #include	<sys/time.h>
  7 76193d7c 2003-09-30 devnull 
  8 76193d7c 2003-09-30 devnull char	*shell = "/bin/sh";
  9 76193d7c 2003-09-30 devnull char	*shellname = "sh";
 10 76193d7c 2003-09-30 devnull 
 11 76193d7c 2003-09-30 devnull extern char **environ;
 12 76193d7c 2003-09-30 devnull 
 13 76193d7c 2003-09-30 devnull static void
 14 76193d7c 2003-09-30 devnull mkperror(char *s)
 15 76193d7c 2003-09-30 devnull {
 16 76193d7c 2003-09-30 devnull 	fprint(2, "%s: %r\n", s);
 17 76193d7c 2003-09-30 devnull }
 18 76193d7c 2003-09-30 devnull 
 19 76193d7c 2003-09-30 devnull void
 20 76193d7c 2003-09-30 devnull readenv(void)
 21 76193d7c 2003-09-30 devnull {
 22 76193d7c 2003-09-30 devnull 	char **p, *s;
 23 76193d7c 2003-09-30 devnull 	Word *w;
 24 76193d7c 2003-09-30 devnull 
 25 76193d7c 2003-09-30 devnull 	for(p = environ; *p; p++){
 26 76193d7c 2003-09-30 devnull 		s = shname(*p);
 27 76193d7c 2003-09-30 devnull 		if(*s == '=') {
 28 76193d7c 2003-09-30 devnull 			*s = 0;
 29 76193d7c 2003-09-30 devnull 			w = newword(s+1);
 30 76193d7c 2003-09-30 devnull 		} else
 31 76193d7c 2003-09-30 devnull 			w = newword("");
 32 76193d7c 2003-09-30 devnull 		if (symlook(*p, S_INTERNAL, 0))
 33 76193d7c 2003-09-30 devnull 			continue;
 34 76193d7c 2003-09-30 devnull 		s = strdup(*p);
 35 76193d7c 2003-09-30 devnull 		setvar(s, (void *)w);
 36 76193d7c 2003-09-30 devnull 		symlook(s, S_EXPORTED, (void*)"")->value = (void*)"";
 37 76193d7c 2003-09-30 devnull 	}
 38 76193d7c 2003-09-30 devnull }
 39 76193d7c 2003-09-30 devnull 
 40 76193d7c 2003-09-30 devnull /*
 41 76193d7c 2003-09-30 devnull  *	done on child side of fork, so parent's env is not affected
 42 76193d7c 2003-09-30 devnull  *	and we don't care about freeing memory because we're going
 43 76193d7c 2003-09-30 devnull  *	to exec immediately after this.
 44 76193d7c 2003-09-30 devnull  */
 45 76193d7c 2003-09-30 devnull void
 46 76193d7c 2003-09-30 devnull exportenv(Envy *e)
 47 76193d7c 2003-09-30 devnull {
 48 76193d7c 2003-09-30 devnull 	int i;
 49 76193d7c 2003-09-30 devnull 	char **p;
 50 92a0a8b6 2004-04-21 devnull 	static char buf[16384];
 51 76193d7c 2003-09-30 devnull 
 52 76193d7c 2003-09-30 devnull 	p = 0;
 53 76193d7c 2003-09-30 devnull 	for(i = 0; e->name; e++, i++) {
 54 76193d7c 2003-09-30 devnull 		p = (char**) Realloc(p, (i+2)*sizeof(char*));
 55 76193d7c 2003-09-30 devnull 		if(e->values)
 56 92a0a8b6 2004-04-21 devnull 			snprint(buf, sizeof buf, "%s=%s", e->name,  wtos(e->values, IWS));
 57 76193d7c 2003-09-30 devnull 		else
 58 92a0a8b6 2004-04-21 devnull 			snprint(buf, sizeof buf, "%s=", e->name);
 59 76193d7c 2003-09-30 devnull 		p[i] = strdup(buf);
 60 76193d7c 2003-09-30 devnull 	}
 61 76193d7c 2003-09-30 devnull 	p[i] = 0;
 62 76193d7c 2003-09-30 devnull 	environ = p;
 63 76193d7c 2003-09-30 devnull }
 64 76193d7c 2003-09-30 devnull 
 65 76193d7c 2003-09-30 devnull int
 66 76193d7c 2003-09-30 devnull waitfor(char *msg)
 67 76193d7c 2003-09-30 devnull {
 68 76193d7c 2003-09-30 devnull 	int status;
 69 76193d7c 2003-09-30 devnull 	int pid;
 70 76193d7c 2003-09-30 devnull 
 71 76193d7c 2003-09-30 devnull 	*msg = 0;
 72 76193d7c 2003-09-30 devnull 	pid = wait(&status);
 73 76193d7c 2003-09-30 devnull 	if(pid > 0) {
 74 76193d7c 2003-09-30 devnull 		if(status&0x7f) {
 75 76193d7c 2003-09-30 devnull 			if(status&0x80)
 76 76193d7c 2003-09-30 devnull 				snprint(msg, ERRMAX, "signal %d, core dumped", status&0x7f);
 77 76193d7c 2003-09-30 devnull 			else
 78 76193d7c 2003-09-30 devnull 				snprint(msg, ERRMAX, "signal %d", status&0x7f);
 79 76193d7c 2003-09-30 devnull 		} else if(status&0xff00)
 80 76193d7c 2003-09-30 devnull 			snprint(msg, ERRMAX, "exit(%d)", (status>>8)&0xff);
 81 76193d7c 2003-09-30 devnull 	}
 82 76193d7c 2003-09-30 devnull 	return pid;
 83 76193d7c 2003-09-30 devnull }
 84 76193d7c 2003-09-30 devnull 
 85 76193d7c 2003-09-30 devnull void
 86 76193d7c 2003-09-30 devnull expunge(int pid, char *msg)
 87 76193d7c 2003-09-30 devnull {
 88 76193d7c 2003-09-30 devnull 	if(strcmp(msg, "interrupt"))
 89 76193d7c 2003-09-30 devnull 		kill(pid, SIGINT);
 90 76193d7c 2003-09-30 devnull 	else
 91 76193d7c 2003-09-30 devnull 		kill(pid, SIGHUP);
 92 76193d7c 2003-09-30 devnull }
 93 76193d7c 2003-09-30 devnull 
 94 92a0a8b6 2004-04-21 devnull int mypid;
 95 92a0a8b6 2004-04-21 devnull 
 96 76193d7c 2003-09-30 devnull int
 97 76193d7c 2003-09-30 devnull execsh(char *args, char *cmd, Bufblock *buf, Envy *e)
 98 76193d7c 2003-09-30 devnull {
 99 76193d7c 2003-09-30 devnull 	char *p;
100 76193d7c 2003-09-30 devnull 	int tot, n, pid, in[2], out[2];
101 76193d7c 2003-09-30 devnull 
102 76193d7c 2003-09-30 devnull 	if(buf && pipe(out) < 0){
103 76193d7c 2003-09-30 devnull 		mkperror("pipe");
104 76193d7c 2003-09-30 devnull 		Exit();
105 76193d7c 2003-09-30 devnull 	}
106 76193d7c 2003-09-30 devnull 	pid = fork();
107 92a0a8b6 2004-04-21 devnull 	mypid = getpid();
108 76193d7c 2003-09-30 devnull 	if(pid < 0){
109 76193d7c 2003-09-30 devnull 		mkperror("mk fork");
110 76193d7c 2003-09-30 devnull 		Exit();
111 76193d7c 2003-09-30 devnull 	}
112 76193d7c 2003-09-30 devnull 	if(pid == 0){
113 76193d7c 2003-09-30 devnull 		if(buf)
114 76193d7c 2003-09-30 devnull 			close(out[0]);
115 76193d7c 2003-09-30 devnull 		if(pipe(in) < 0){
116 76193d7c 2003-09-30 devnull 			mkperror("pipe");
117 76193d7c 2003-09-30 devnull 			Exit();
118 76193d7c 2003-09-30 devnull 		}
119 76193d7c 2003-09-30 devnull 		pid = fork();
120 76193d7c 2003-09-30 devnull 		if(pid < 0){
121 76193d7c 2003-09-30 devnull 			mkperror("mk fork");
122 76193d7c 2003-09-30 devnull 			Exit();
123 76193d7c 2003-09-30 devnull 		}
124 76193d7c 2003-09-30 devnull 		if(pid != 0){
125 76193d7c 2003-09-30 devnull 			dup2(in[0], 0);
126 76193d7c 2003-09-30 devnull 			if(buf){
127 76193d7c 2003-09-30 devnull 				dup2(out[1], 1);
128 76193d7c 2003-09-30 devnull 				close(out[1]);
129 76193d7c 2003-09-30 devnull 			}
130 76193d7c 2003-09-30 devnull 			close(in[0]);
131 76193d7c 2003-09-30 devnull 			close(in[1]);
132 76193d7c 2003-09-30 devnull 			if (e)
133 76193d7c 2003-09-30 devnull 				exportenv(e);
134 76193d7c 2003-09-30 devnull 			if(shflags)
135 76193d7c 2003-09-30 devnull 				execl(shell, shellname, shflags, args, 0);
136 76193d7c 2003-09-30 devnull 			else
137 76193d7c 2003-09-30 devnull 				execl(shell, shellname, args, 0);
138 76193d7c 2003-09-30 devnull 			mkperror(shell);
139 76193d7c 2003-09-30 devnull 			_exit(1);
140 76193d7c 2003-09-30 devnull 		}
141 76193d7c 2003-09-30 devnull 		close(out[1]);
142 76193d7c 2003-09-30 devnull 		close(in[0]);
143 76193d7c 2003-09-30 devnull 		if(DEBUG(D_EXEC))
144 76193d7c 2003-09-30 devnull 			fprint(1, "starting: %s\n", cmd);
145 76193d7c 2003-09-30 devnull 		p = cmd+strlen(cmd);
146 76193d7c 2003-09-30 devnull 		while(cmd < p){
147 76193d7c 2003-09-30 devnull 			n = write(in[1], cmd, p-cmd);
148 76193d7c 2003-09-30 devnull 			if(n < 0)
149 76193d7c 2003-09-30 devnull 				break;
150 76193d7c 2003-09-30 devnull 			cmd += n;
151 76193d7c 2003-09-30 devnull 		}
152 76193d7c 2003-09-30 devnull 		close(in[1]);
153 76193d7c 2003-09-30 devnull 		_exit(0);
154 76193d7c 2003-09-30 devnull 	}
155 76193d7c 2003-09-30 devnull 	if(buf){
156 76193d7c 2003-09-30 devnull 		close(out[1]);
157 76193d7c 2003-09-30 devnull 		tot = 0;
158 76193d7c 2003-09-30 devnull 		for(;;){
159 76193d7c 2003-09-30 devnull 			if (buf->current >= buf->end)
160 76193d7c 2003-09-30 devnull 				growbuf(buf);
161 76193d7c 2003-09-30 devnull 			n = read(out[0], buf->current, buf->end-buf->current);
162 76193d7c 2003-09-30 devnull 			if(n <= 0)
163 76193d7c 2003-09-30 devnull 				break;
164 76193d7c 2003-09-30 devnull 			buf->current += n;
165 76193d7c 2003-09-30 devnull 			tot += n;
166 76193d7c 2003-09-30 devnull 		}
167 76193d7c 2003-09-30 devnull 		if (tot && buf->current[-1] == '\n')
168 76193d7c 2003-09-30 devnull 			buf->current--;
169 76193d7c 2003-09-30 devnull 		close(out[0]);
170 76193d7c 2003-09-30 devnull 	}
171 76193d7c 2003-09-30 devnull 	return pid;
172 76193d7c 2003-09-30 devnull }
173 76193d7c 2003-09-30 devnull 
174 76193d7c 2003-09-30 devnull int
175 76193d7c 2003-09-30 devnull pipecmd(char *cmd, Envy *e, int *fd)
176 76193d7c 2003-09-30 devnull {
177 76193d7c 2003-09-30 devnull 	int pid, pfd[2];
178 76193d7c 2003-09-30 devnull 
179 76193d7c 2003-09-30 devnull 	if(DEBUG(D_EXEC))
180 76193d7c 2003-09-30 devnull 		fprint(1, "pipecmd='%s'\n", cmd);/**/
181 76193d7c 2003-09-30 devnull 
182 76193d7c 2003-09-30 devnull 	if(fd && pipe(pfd) < 0){
183 76193d7c 2003-09-30 devnull 		mkperror("pipe");
184 76193d7c 2003-09-30 devnull 		Exit();
185 76193d7c 2003-09-30 devnull 	}
186 76193d7c 2003-09-30 devnull 	pid = fork();
187 76193d7c 2003-09-30 devnull 	if(pid < 0){
188 76193d7c 2003-09-30 devnull 		mkperror("mk fork");
189 76193d7c 2003-09-30 devnull 		Exit();
190 76193d7c 2003-09-30 devnull 	}
191 76193d7c 2003-09-30 devnull 	if(pid == 0){
192 76193d7c 2003-09-30 devnull 		if(fd){
193 76193d7c 2003-09-30 devnull 			close(pfd[0]);
194 76193d7c 2003-09-30 devnull 			dup2(pfd[1], 1);
195 76193d7c 2003-09-30 devnull 			close(pfd[1]);
196 76193d7c 2003-09-30 devnull 		}
197 76193d7c 2003-09-30 devnull 		if(e)
198 76193d7c 2003-09-30 devnull 			exportenv(e);
199 76193d7c 2003-09-30 devnull 		if(shflags)
200 76193d7c 2003-09-30 devnull 			execl(shell, shellname, shflags, "-c", cmd, 0);
201 76193d7c 2003-09-30 devnull 		else
202 76193d7c 2003-09-30 devnull 			execl(shell, shellname, "-c", cmd, 0);
203 76193d7c 2003-09-30 devnull 		mkperror(shell);
204 76193d7c 2003-09-30 devnull 		_exit(1);
205 76193d7c 2003-09-30 devnull 	}
206 76193d7c 2003-09-30 devnull 	if(fd){
207 76193d7c 2003-09-30 devnull 		close(pfd[1]);
208 76193d7c 2003-09-30 devnull 		*fd = pfd[0];
209 76193d7c 2003-09-30 devnull 	}
210 76193d7c 2003-09-30 devnull 	return pid;
211 76193d7c 2003-09-30 devnull }
212 76193d7c 2003-09-30 devnull 
213 76193d7c 2003-09-30 devnull void
214 76193d7c 2003-09-30 devnull Exit(void)
215 76193d7c 2003-09-30 devnull {
216 76193d7c 2003-09-30 devnull 	while(wait(0) >= 0)
217 76193d7c 2003-09-30 devnull 		;
218 76193d7c 2003-09-30 devnull 	exits("error");
219 76193d7c 2003-09-30 devnull }
220 76193d7c 2003-09-30 devnull 
221 76193d7c 2003-09-30 devnull static	struct
222 76193d7c 2003-09-30 devnull {
223 76193d7c 2003-09-30 devnull 	int	sig;
224 76193d7c 2003-09-30 devnull 	char	*msg;
225 76193d7c 2003-09-30 devnull }	sigmsgs[] =
226 76193d7c 2003-09-30 devnull {
227 76193d7c 2003-09-30 devnull 	SIGALRM,	"alarm",
228 76193d7c 2003-09-30 devnull 	SIGFPE,		"sys: fp: fptrap",
229 76193d7c 2003-09-30 devnull 	SIGPIPE,	"sys: write on closed pipe",
230 76193d7c 2003-09-30 devnull 	SIGILL,		"sys: trap: illegal instruction",
231 92a0a8b6 2004-04-21 devnull //	SIGSEGV,	"sys: segmentation violation",
232 76193d7c 2003-09-30 devnull 	0,		0
233 76193d7c 2003-09-30 devnull };
234 76193d7c 2003-09-30 devnull 
235 76193d7c 2003-09-30 devnull static void
236 76193d7c 2003-09-30 devnull notifyf(int sig)
237 76193d7c 2003-09-30 devnull {
238 76193d7c 2003-09-30 devnull 	int i;
239 76193d7c 2003-09-30 devnull 
240 76193d7c 2003-09-30 devnull 	for(i = 0; sigmsgs[i].msg; i++)
241 76193d7c 2003-09-30 devnull 		if(sigmsgs[i].sig == sig)
242 76193d7c 2003-09-30 devnull 			killchildren(sigmsgs[i].msg);
243 76193d7c 2003-09-30 devnull 
244 76193d7c 2003-09-30 devnull 	/* should never happen */
245 76193d7c 2003-09-30 devnull 	signal(sig, SIG_DFL);
246 76193d7c 2003-09-30 devnull 	kill(getpid(), sig);
247 76193d7c 2003-09-30 devnull }
248 76193d7c 2003-09-30 devnull 
249 76193d7c 2003-09-30 devnull void
250 76193d7c 2003-09-30 devnull catchnotes()
251 76193d7c 2003-09-30 devnull {
252 76193d7c 2003-09-30 devnull 	int i;
253 76193d7c 2003-09-30 devnull 
254 76193d7c 2003-09-30 devnull 	for(i = 0; sigmsgs[i].msg; i++)
255 76193d7c 2003-09-30 devnull 		signal(sigmsgs[i].sig, notifyf);
256 76193d7c 2003-09-30 devnull }
257 76193d7c 2003-09-30 devnull 
258 76193d7c 2003-09-30 devnull char*
259 76193d7c 2003-09-30 devnull maketmp(int *pfd)
260 76193d7c 2003-09-30 devnull {
261 76193d7c 2003-09-30 devnull 	static char temp[] = "/tmp/mkargXXXXXX";
262 76193d7c 2003-09-30 devnull 	static char buf[100];
263 76193d7c 2003-09-30 devnull 	int fd;
264 76193d7c 2003-09-30 devnull 
265 76193d7c 2003-09-30 devnull 	strcpy(buf, temp);
266 76193d7c 2003-09-30 devnull 	fd = mkstemp(buf);
267 76193d7c 2003-09-30 devnull 	if(fd < 0)
268 76193d7c 2003-09-30 devnull 		return 0;
269 76193d7c 2003-09-30 devnull 	*pfd = fd;
270 76193d7c 2003-09-30 devnull 	return buf;
271 76193d7c 2003-09-30 devnull }
272 76193d7c 2003-09-30 devnull 
273 76193d7c 2003-09-30 devnull int
274 76193d7c 2003-09-30 devnull chgtime(char *name)
275 76193d7c 2003-09-30 devnull {
276 76193d7c 2003-09-30 devnull 	if(access(name, 0) >= 0)
277 76193d7c 2003-09-30 devnull 		return utimes(name, 0);
278 76193d7c 2003-09-30 devnull 	return close(creat(name, 0666));
279 76193d7c 2003-09-30 devnull }
280 76193d7c 2003-09-30 devnull 
281 76193d7c 2003-09-30 devnull void
282 76193d7c 2003-09-30 devnull rcopy(char **to, Resub *match, int n)
283 76193d7c 2003-09-30 devnull {
284 76193d7c 2003-09-30 devnull 	int c;
285 76193d7c 2003-09-30 devnull 	char *p;
286 76193d7c 2003-09-30 devnull 
287 76193d7c 2003-09-30 devnull 	*to = match->s.sp;		/* stem0 matches complete target */
288 76193d7c 2003-09-30 devnull 	for(to++, match++; --n > 0; to++, match++){
289 76193d7c 2003-09-30 devnull 		if(match->s.sp && match->e.ep){
290 76193d7c 2003-09-30 devnull 			p = match->e.ep;
291 76193d7c 2003-09-30 devnull 			c = *p;
292 76193d7c 2003-09-30 devnull 			*p = 0;
293 76193d7c 2003-09-30 devnull 			*to = strdup(match->s.sp);
294 76193d7c 2003-09-30 devnull 			*p = c;
295 76193d7c 2003-09-30 devnull 		}
296 76193d7c 2003-09-30 devnull 		else
297 76193d7c 2003-09-30 devnull 			*to = 0;
298 76193d7c 2003-09-30 devnull 	}
299 76193d7c 2003-09-30 devnull }
300 76193d7c 2003-09-30 devnull 
301 76193d7c 2003-09-30 devnull ulong
302 76193d7c 2003-09-30 devnull mkmtime(char *name)
303 76193d7c 2003-09-30 devnull {
304 76193d7c 2003-09-30 devnull 	struct stat st;
305 76193d7c 2003-09-30 devnull 
306 76193d7c 2003-09-30 devnull 	if(stat(name, &st) < 0)
307 76193d7c 2003-09-30 devnull 		return 0;
308 76193d7c 2003-09-30 devnull 
309 76193d7c 2003-09-30 devnull 	return st.st_mtime;
310 76193d7c 2003-09-30 devnull }