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 f1bfc54e 2004-05-14 devnull /* rsc 5/5/2004 -- This misparses fn#cd={whatever} 
 27 76193d7c 2003-09-30 devnull 		s = shname(*p);
 28 76193d7c 2003-09-30 devnull 		if(*s == '=') {
 29 f1bfc54e 2004-05-14 devnull 			*s = 0;
 30 f1bfc54e 2004-05-14 devnull 			w = newword(s+1);
 31 f1bfc54e 2004-05-14 devnull 		} else
 32 f1bfc54e 2004-05-14 devnull 			w = newword("");
 33 f1bfc54e 2004-05-14 devnull */
 34 f1bfc54e 2004-05-14 devnull 		s = strchr(*p, '=');
 35 f1bfc54e 2004-05-14 devnull 		if(s){
 36 76193d7c 2003-09-30 devnull 			*s = 0;
 37 76193d7c 2003-09-30 devnull 			w = newword(s+1);
 38 76193d7c 2003-09-30 devnull 		} else
 39 76193d7c 2003-09-30 devnull 			w = newword("");
 40 76193d7c 2003-09-30 devnull 		if (symlook(*p, S_INTERNAL, 0))
 41 76193d7c 2003-09-30 devnull 			continue;
 42 76193d7c 2003-09-30 devnull 		s = strdup(*p);
 43 76193d7c 2003-09-30 devnull 		setvar(s, (void *)w);
 44 3fe9465a 2006-04-20 devnull 		symlook(s, S_EXPORTED, (void*)"")->u.ptr = "";
 45 76193d7c 2003-09-30 devnull 	}
 46 76193d7c 2003-09-30 devnull }
 47 76193d7c 2003-09-30 devnull 
 48 76193d7c 2003-09-30 devnull /*
 49 76193d7c 2003-09-30 devnull  *	done on child side of fork, so parent's env is not affected
 50 76193d7c 2003-09-30 devnull  *	and we don't care about freeing memory because we're going
 51 76193d7c 2003-09-30 devnull  *	to exec immediately after this.
 52 76193d7c 2003-09-30 devnull  */
 53 76193d7c 2003-09-30 devnull void
 54 9aa1c92f 2005-01-04 devnull exportenv(Envy *e, Shell *sh)
 55 76193d7c 2003-09-30 devnull {
 56 76193d7c 2003-09-30 devnull 	int i;
 57 76193d7c 2003-09-30 devnull 	char **p;
 58 92a0a8b6 2004-04-21 devnull 	static char buf[16384];
 59 76193d7c 2003-09-30 devnull 
 60 76193d7c 2003-09-30 devnull 	p = 0;
 61 76193d7c 2003-09-30 devnull 	for(i = 0; e->name; e++, i++) {
 62 76193d7c 2003-09-30 devnull 		p = (char**) Realloc(p, (i+2)*sizeof(char*));
 63 76193d7c 2003-09-30 devnull 		if(e->values)
 64 9aa1c92f 2005-01-04 devnull 			snprint(buf, sizeof buf, "%s=%s", e->name,  wtos(e->values, sh->iws));
 65 76193d7c 2003-09-30 devnull 		else
 66 92a0a8b6 2004-04-21 devnull 			snprint(buf, sizeof buf, "%s=", e->name);
 67 76193d7c 2003-09-30 devnull 		p[i] = strdup(buf);
 68 76193d7c 2003-09-30 devnull 	}
 69 76193d7c 2003-09-30 devnull 	p[i] = 0;
 70 76193d7c 2003-09-30 devnull 	environ = p;
 71 76193d7c 2003-09-30 devnull }
 72 76193d7c 2003-09-30 devnull 
 73 76193d7c 2003-09-30 devnull int
 74 76193d7c 2003-09-30 devnull waitfor(char *msg)
 75 76193d7c 2003-09-30 devnull {
 76 76193d7c 2003-09-30 devnull 	int status;
 77 76193d7c 2003-09-30 devnull 	int pid;
 78 76193d7c 2003-09-30 devnull 
 79 76193d7c 2003-09-30 devnull 	*msg = 0;
 80 76193d7c 2003-09-30 devnull 	pid = wait(&status);
 81 76193d7c 2003-09-30 devnull 	if(pid > 0) {
 82 76193d7c 2003-09-30 devnull 		if(status&0x7f) {
 83 76193d7c 2003-09-30 devnull 			if(status&0x80)
 84 76193d7c 2003-09-30 devnull 				snprint(msg, ERRMAX, "signal %d, core dumped", status&0x7f);
 85 76193d7c 2003-09-30 devnull 			else
 86 76193d7c 2003-09-30 devnull 				snprint(msg, ERRMAX, "signal %d", status&0x7f);
 87 76193d7c 2003-09-30 devnull 		} else if(status&0xff00)
 88 76193d7c 2003-09-30 devnull 			snprint(msg, ERRMAX, "exit(%d)", (status>>8)&0xff);
 89 76193d7c 2003-09-30 devnull 	}
 90 76193d7c 2003-09-30 devnull 	return pid;
 91 76193d7c 2003-09-30 devnull }
 92 76193d7c 2003-09-30 devnull 
 93 76193d7c 2003-09-30 devnull void
 94 76193d7c 2003-09-30 devnull expunge(int pid, char *msg)
 95 76193d7c 2003-09-30 devnull {
 96 76193d7c 2003-09-30 devnull 	if(strcmp(msg, "interrupt"))
 97 76193d7c 2003-09-30 devnull 		kill(pid, SIGINT);
 98 76193d7c 2003-09-30 devnull 	else
 99 76193d7c 2003-09-30 devnull 		kill(pid, SIGHUP);
100 76193d7c 2003-09-30 devnull }
101 76193d7c 2003-09-30 devnull 
102 92a0a8b6 2004-04-21 devnull int mypid;
103 92a0a8b6 2004-04-21 devnull 
104 76193d7c 2003-09-30 devnull int
105 9aa1c92f 2005-01-04 devnull shargv(Word *cmd, int extra, char ***pargv)
106 76193d7c 2003-09-30 devnull {
107 9aa1c92f 2005-01-04 devnull 	char **argv;
108 9aa1c92f 2005-01-04 devnull 	int i, n;
109 9aa1c92f 2005-01-04 devnull 	Word *w;
110 9aa1c92f 2005-01-04 devnull 
111 9aa1c92f 2005-01-04 devnull 	n = 0;
112 9aa1c92f 2005-01-04 devnull 	for(w=cmd; w; w=w->next)
113 9aa1c92f 2005-01-04 devnull 		n++;
114 9aa1c92f 2005-01-04 devnull 	
115 9aa1c92f 2005-01-04 devnull 	argv = Malloc((n+extra+1)*sizeof(argv[0]));
116 9aa1c92f 2005-01-04 devnull 	i = 0;
117 9aa1c92f 2005-01-04 devnull 	for(w=cmd; w; w=w->next)
118 9aa1c92f 2005-01-04 devnull 		argv[i++] = w->s;
119 9aa1c92f 2005-01-04 devnull 	argv[n] = 0;
120 9aa1c92f 2005-01-04 devnull 	*pargv = argv;
121 9aa1c92f 2005-01-04 devnull 	return n;
122 9aa1c92f 2005-01-04 devnull }	
123 9aa1c92f 2005-01-04 devnull 
124 9aa1c92f 2005-01-04 devnull int
125 9aa1c92f 2005-01-04 devnull execsh(char *args, char *cmd, Bufblock *buf, Envy *e, Shell *sh, Word *shellcmd)
126 9aa1c92f 2005-01-04 devnull {
127 9aa1c92f 2005-01-04 devnull 	char *p, **argv;
128 76193d7c 2003-09-30 devnull 	int tot, n, pid, in[2], out[2];
129 76193d7c 2003-09-30 devnull 
130 76193d7c 2003-09-30 devnull 	if(buf && pipe(out) < 0){
131 76193d7c 2003-09-30 devnull 		mkperror("pipe");
132 76193d7c 2003-09-30 devnull 		Exit();
133 76193d7c 2003-09-30 devnull 	}
134 76193d7c 2003-09-30 devnull 	pid = fork();
135 92a0a8b6 2004-04-21 devnull 	mypid = getpid();
136 76193d7c 2003-09-30 devnull 	if(pid < 0){
137 76193d7c 2003-09-30 devnull 		mkperror("mk fork");
138 76193d7c 2003-09-30 devnull 		Exit();
139 76193d7c 2003-09-30 devnull 	}
140 76193d7c 2003-09-30 devnull 	if(pid == 0){
141 76193d7c 2003-09-30 devnull 		if(buf)
142 76193d7c 2003-09-30 devnull 			close(out[0]);
143 76193d7c 2003-09-30 devnull 		if(pipe(in) < 0){
144 76193d7c 2003-09-30 devnull 			mkperror("pipe");
145 76193d7c 2003-09-30 devnull 			Exit();
146 76193d7c 2003-09-30 devnull 		}
147 76193d7c 2003-09-30 devnull 		pid = fork();
148 76193d7c 2003-09-30 devnull 		if(pid < 0){
149 76193d7c 2003-09-30 devnull 			mkperror("mk fork");
150 76193d7c 2003-09-30 devnull 			Exit();
151 76193d7c 2003-09-30 devnull 		}
152 76193d7c 2003-09-30 devnull 		if(pid != 0){
153 76193d7c 2003-09-30 devnull 			dup2(in[0], 0);
154 76193d7c 2003-09-30 devnull 			if(buf){
155 76193d7c 2003-09-30 devnull 				dup2(out[1], 1);
156 76193d7c 2003-09-30 devnull 				close(out[1]);
157 76193d7c 2003-09-30 devnull 			}
158 76193d7c 2003-09-30 devnull 			close(in[0]);
159 76193d7c 2003-09-30 devnull 			close(in[1]);
160 76193d7c 2003-09-30 devnull 			if (e)
161 9aa1c92f 2005-01-04 devnull 				exportenv(e, sh);
162 9aa1c92f 2005-01-04 devnull 			n = shargv(shellcmd, 1, &argv);
163 9aa1c92f 2005-01-04 devnull 			argv[n++] = args;
164 9aa1c92f 2005-01-04 devnull 			argv[n] = 0;
165 9aa1c92f 2005-01-04 devnull 			execvp(argv[0], argv);
166 76193d7c 2003-09-30 devnull 			mkperror(shell);
167 76193d7c 2003-09-30 devnull 			_exit(1);
168 76193d7c 2003-09-30 devnull 		}
169 76193d7c 2003-09-30 devnull 		close(out[1]);
170 76193d7c 2003-09-30 devnull 		close(in[0]);
171 76193d7c 2003-09-30 devnull 		if(DEBUG(D_EXEC))
172 76193d7c 2003-09-30 devnull 			fprint(1, "starting: %s\n", cmd);
173 76193d7c 2003-09-30 devnull 		p = cmd+strlen(cmd);
174 76193d7c 2003-09-30 devnull 		while(cmd < p){
175 76193d7c 2003-09-30 devnull 			n = write(in[1], cmd, p-cmd);
176 76193d7c 2003-09-30 devnull 			if(n < 0)
177 76193d7c 2003-09-30 devnull 				break;
178 76193d7c 2003-09-30 devnull 			cmd += n;
179 76193d7c 2003-09-30 devnull 		}
180 76193d7c 2003-09-30 devnull 		close(in[1]);
181 76193d7c 2003-09-30 devnull 		_exit(0);
182 76193d7c 2003-09-30 devnull 	}
183 76193d7c 2003-09-30 devnull 	if(buf){
184 76193d7c 2003-09-30 devnull 		close(out[1]);
185 76193d7c 2003-09-30 devnull 		tot = 0;
186 76193d7c 2003-09-30 devnull 		for(;;){
187 76193d7c 2003-09-30 devnull 			if (buf->current >= buf->end)
188 76193d7c 2003-09-30 devnull 				growbuf(buf);
189 76193d7c 2003-09-30 devnull 			n = read(out[0], buf->current, buf->end-buf->current);
190 76193d7c 2003-09-30 devnull 			if(n <= 0)
191 76193d7c 2003-09-30 devnull 				break;
192 76193d7c 2003-09-30 devnull 			buf->current += n;
193 76193d7c 2003-09-30 devnull 			tot += n;
194 76193d7c 2003-09-30 devnull 		}
195 76193d7c 2003-09-30 devnull 		if (tot && buf->current[-1] == '\n')
196 76193d7c 2003-09-30 devnull 			buf->current--;
197 76193d7c 2003-09-30 devnull 		close(out[0]);
198 76193d7c 2003-09-30 devnull 	}
199 76193d7c 2003-09-30 devnull 	return pid;
200 76193d7c 2003-09-30 devnull }
201 76193d7c 2003-09-30 devnull 
202 76193d7c 2003-09-30 devnull int
203 9aa1c92f 2005-01-04 devnull pipecmd(char *cmd, Envy *e, int *fd, Shell *sh, Word *shellcmd)
204 76193d7c 2003-09-30 devnull {
205 76193d7c 2003-09-30 devnull 	int pid, pfd[2];
206 9aa1c92f 2005-01-04 devnull 	int n;
207 9aa1c92f 2005-01-04 devnull 	char **argv;
208 76193d7c 2003-09-30 devnull 
209 76193d7c 2003-09-30 devnull 	if(DEBUG(D_EXEC))
210 76193d7c 2003-09-30 devnull 		fprint(1, "pipecmd='%s'\n", cmd);/**/
211 76193d7c 2003-09-30 devnull 
212 76193d7c 2003-09-30 devnull 	if(fd && pipe(pfd) < 0){
213 76193d7c 2003-09-30 devnull 		mkperror("pipe");
214 76193d7c 2003-09-30 devnull 		Exit();
215 76193d7c 2003-09-30 devnull 	}
216 76193d7c 2003-09-30 devnull 	pid = fork();
217 76193d7c 2003-09-30 devnull 	if(pid < 0){
218 76193d7c 2003-09-30 devnull 		mkperror("mk fork");
219 76193d7c 2003-09-30 devnull 		Exit();
220 76193d7c 2003-09-30 devnull 	}
221 76193d7c 2003-09-30 devnull 	if(pid == 0){
222 76193d7c 2003-09-30 devnull 		if(fd){
223 76193d7c 2003-09-30 devnull 			close(pfd[0]);
224 76193d7c 2003-09-30 devnull 			dup2(pfd[1], 1);
225 76193d7c 2003-09-30 devnull 			close(pfd[1]);
226 76193d7c 2003-09-30 devnull 		}
227 76193d7c 2003-09-30 devnull 		if(e)
228 9aa1c92f 2005-01-04 devnull 			exportenv(e, sh);
229 9aa1c92f 2005-01-04 devnull 		n = shargv(shellcmd, 2, &argv);
230 9aa1c92f 2005-01-04 devnull 		argv[n++] = "-c";
231 9aa1c92f 2005-01-04 devnull 		argv[n++] = cmd;
232 9aa1c92f 2005-01-04 devnull 		argv[n] = 0;
233 9aa1c92f 2005-01-04 devnull 		execvp(argv[0], argv);
234 76193d7c 2003-09-30 devnull 		mkperror(shell);
235 76193d7c 2003-09-30 devnull 		_exit(1);
236 76193d7c 2003-09-30 devnull 	}
237 76193d7c 2003-09-30 devnull 	if(fd){
238 76193d7c 2003-09-30 devnull 		close(pfd[1]);
239 76193d7c 2003-09-30 devnull 		*fd = pfd[0];
240 76193d7c 2003-09-30 devnull 	}
241 76193d7c 2003-09-30 devnull 	return pid;
242 76193d7c 2003-09-30 devnull }
243 76193d7c 2003-09-30 devnull 
244 76193d7c 2003-09-30 devnull void
245 76193d7c 2003-09-30 devnull Exit(void)
246 76193d7c 2003-09-30 devnull {
247 76193d7c 2003-09-30 devnull 	while(wait(0) >= 0)
248 76193d7c 2003-09-30 devnull 		;
249 76193d7c 2003-09-30 devnull 	exits("error");
250 76193d7c 2003-09-30 devnull }
251 76193d7c 2003-09-30 devnull 
252 76193d7c 2003-09-30 devnull static	struct
253 76193d7c 2003-09-30 devnull {
254 76193d7c 2003-09-30 devnull 	int	sig;
255 76193d7c 2003-09-30 devnull 	char	*msg;
256 76193d7c 2003-09-30 devnull }	sigmsgs[] =
257 76193d7c 2003-09-30 devnull {
258 76193d7c 2003-09-30 devnull 	SIGALRM,	"alarm",
259 76193d7c 2003-09-30 devnull 	SIGFPE,		"sys: fp: fptrap",
260 76193d7c 2003-09-30 devnull 	SIGPIPE,	"sys: write on closed pipe",
261 76193d7c 2003-09-30 devnull 	SIGILL,		"sys: trap: illegal instruction",
262 cbeb0b26 2006-04-01 devnull /*	SIGSEGV,	"sys: segmentation violation", */
263 76193d7c 2003-09-30 devnull 	0,		0
264 76193d7c 2003-09-30 devnull };
265 76193d7c 2003-09-30 devnull 
266 76193d7c 2003-09-30 devnull static void
267 76193d7c 2003-09-30 devnull notifyf(int sig)
268 76193d7c 2003-09-30 devnull {
269 76193d7c 2003-09-30 devnull 	int i;
270 76193d7c 2003-09-30 devnull 
271 76193d7c 2003-09-30 devnull 	for(i = 0; sigmsgs[i].msg; i++)
272 76193d7c 2003-09-30 devnull 		if(sigmsgs[i].sig == sig)
273 76193d7c 2003-09-30 devnull 			killchildren(sigmsgs[i].msg);
274 76193d7c 2003-09-30 devnull 
275 76193d7c 2003-09-30 devnull 	/* should never happen */
276 76193d7c 2003-09-30 devnull 	signal(sig, SIG_DFL);
277 76193d7c 2003-09-30 devnull 	kill(getpid(), sig);
278 76193d7c 2003-09-30 devnull }
279 76193d7c 2003-09-30 devnull 
280 76193d7c 2003-09-30 devnull void
281 2b604081 2005-05-07 devnull catchnotes(void)
282 76193d7c 2003-09-30 devnull {
283 76193d7c 2003-09-30 devnull 	int i;
284 76193d7c 2003-09-30 devnull 
285 76193d7c 2003-09-30 devnull 	for(i = 0; sigmsgs[i].msg; i++)
286 76193d7c 2003-09-30 devnull 		signal(sigmsgs[i].sig, notifyf);
287 76193d7c 2003-09-30 devnull }
288 76193d7c 2003-09-30 devnull 
289 76193d7c 2003-09-30 devnull char*
290 76193d7c 2003-09-30 devnull maketmp(int *pfd)
291 76193d7c 2003-09-30 devnull {
292 76193d7c 2003-09-30 devnull 	static char temp[] = "/tmp/mkargXXXXXX";
293 76193d7c 2003-09-30 devnull 	static char buf[100];
294 76193d7c 2003-09-30 devnull 	int fd;
295 76193d7c 2003-09-30 devnull 
296 76193d7c 2003-09-30 devnull 	strcpy(buf, temp);
297 76193d7c 2003-09-30 devnull 	fd = mkstemp(buf);
298 76193d7c 2003-09-30 devnull 	if(fd < 0)
299 76193d7c 2003-09-30 devnull 		return 0;
300 76193d7c 2003-09-30 devnull 	*pfd = fd;
301 76193d7c 2003-09-30 devnull 	return buf;
302 76193d7c 2003-09-30 devnull }
303 76193d7c 2003-09-30 devnull 
304 76193d7c 2003-09-30 devnull int
305 76193d7c 2003-09-30 devnull chgtime(char *name)
306 76193d7c 2003-09-30 devnull {
307 76193d7c 2003-09-30 devnull 	if(access(name, 0) >= 0)
308 76193d7c 2003-09-30 devnull 		return utimes(name, 0);
309 76193d7c 2003-09-30 devnull 	return close(creat(name, 0666));
310 76193d7c 2003-09-30 devnull }
311 76193d7c 2003-09-30 devnull 
312 76193d7c 2003-09-30 devnull void
313 76193d7c 2003-09-30 devnull rcopy(char **to, Resub *match, int n)
314 76193d7c 2003-09-30 devnull {
315 76193d7c 2003-09-30 devnull 	int c;
316 76193d7c 2003-09-30 devnull 	char *p;
317 76193d7c 2003-09-30 devnull 
318 76193d7c 2003-09-30 devnull 	*to = match->s.sp;		/* stem0 matches complete target */
319 76193d7c 2003-09-30 devnull 	for(to++, match++; --n > 0; to++, match++){
320 76193d7c 2003-09-30 devnull 		if(match->s.sp && match->e.ep){
321 76193d7c 2003-09-30 devnull 			p = match->e.ep;
322 76193d7c 2003-09-30 devnull 			c = *p;
323 76193d7c 2003-09-30 devnull 			*p = 0;
324 76193d7c 2003-09-30 devnull 			*to = strdup(match->s.sp);
325 76193d7c 2003-09-30 devnull 			*p = c;
326 76193d7c 2003-09-30 devnull 		}
327 76193d7c 2003-09-30 devnull 		else
328 76193d7c 2003-09-30 devnull 			*to = 0;
329 76193d7c 2003-09-30 devnull 	}
330 76193d7c 2003-09-30 devnull }
331 76193d7c 2003-09-30 devnull 
332 0753502e 2005-01-23 devnull unsigned long
333 76193d7c 2003-09-30 devnull mkmtime(char *name)
334 76193d7c 2003-09-30 devnull {
335 76193d7c 2003-09-30 devnull 	struct stat st;
336 76193d7c 2003-09-30 devnull 
337 76193d7c 2003-09-30 devnull 	if(stat(name, &st) < 0)
338 76193d7c 2003-09-30 devnull 		return 0;
339 76193d7c 2003-09-30 devnull 
340 76193d7c 2003-09-30 devnull 	return st.st_mtime;
341 76193d7c 2003-09-30 devnull }