1 76193d7c 2003-09-30 devnull #include	"mk.h"
  2 76193d7c 2003-09-30 devnull #include	<sys/wait.h>
  3 76193d7c 2003-09-30 devnull #include	<signal.h>
  4 76193d7c 2003-09-30 devnull #include	<sys/stat.h>
  5 76193d7c 2003-09-30 devnull #include	<sys/time.h>
  6 76193d7c 2003-09-30 devnull 
  7 76193d7c 2003-09-30 devnull char	*shell = "/bin/sh";
  8 76193d7c 2003-09-30 devnull char	*shellname = "sh";
  9 76193d7c 2003-09-30 devnull 
 10 76193d7c 2003-09-30 devnull extern char **environ;
 11 76193d7c 2003-09-30 devnull 
 12 76193d7c 2003-09-30 devnull static void
 13 76193d7c 2003-09-30 devnull mkperror(char *s)
 14 76193d7c 2003-09-30 devnull {
 15 76193d7c 2003-09-30 devnull 	fprint(2, "%s: %r\n", s);
 16 76193d7c 2003-09-30 devnull }
 17 76193d7c 2003-09-30 devnull 
 18 76193d7c 2003-09-30 devnull void
 19 76193d7c 2003-09-30 devnull readenv(void)
 20 76193d7c 2003-09-30 devnull {
 21 76193d7c 2003-09-30 devnull 	char **p, *s;
 22 76193d7c 2003-09-30 devnull 	Word *w;
 23 76193d7c 2003-09-30 devnull 
 24 76193d7c 2003-09-30 devnull 	for(p = environ; *p; p++){
 25 76193d7c 2003-09-30 devnull 		s = shname(*p);
 26 76193d7c 2003-09-30 devnull 		if(*s == '=') {
 27 76193d7c 2003-09-30 devnull 			*s = 0;
 28 76193d7c 2003-09-30 devnull 			w = newword(s+1);
 29 76193d7c 2003-09-30 devnull 		} else
 30 76193d7c 2003-09-30 devnull 			w = newword("");
 31 76193d7c 2003-09-30 devnull 		if (symlook(*p, S_INTERNAL, 0))
 32 76193d7c 2003-09-30 devnull 			continue;
 33 76193d7c 2003-09-30 devnull 		s = strdup(*p);
 34 76193d7c 2003-09-30 devnull 		setvar(s, (void *)w);
 35 76193d7c 2003-09-30 devnull 		symlook(s, S_EXPORTED, (void*)"")->value = (void*)"";
 36 76193d7c 2003-09-30 devnull 	}
 37 76193d7c 2003-09-30 devnull }
 38 76193d7c 2003-09-30 devnull 
 39 76193d7c 2003-09-30 devnull /*
 40 76193d7c 2003-09-30 devnull  *	done on child side of fork, so parent's env is not affected
 41 76193d7c 2003-09-30 devnull  *	and we don't care about freeing memory because we're going
 42 76193d7c 2003-09-30 devnull  *	to exec immediately after this.
 43 76193d7c 2003-09-30 devnull  */
 44 76193d7c 2003-09-30 devnull void
 45 76193d7c 2003-09-30 devnull exportenv(Envy *e)
 46 76193d7c 2003-09-30 devnull {
 47 76193d7c 2003-09-30 devnull 	int i;
 48 76193d7c 2003-09-30 devnull 	char **p;
 49 76193d7c 2003-09-30 devnull 	char buf[4096];
 50 76193d7c 2003-09-30 devnull 
 51 76193d7c 2003-09-30 devnull 	p = 0;
 52 76193d7c 2003-09-30 devnull 	for(i = 0; e->name; e++, i++) {
 53 76193d7c 2003-09-30 devnull 		p = (char**) Realloc(p, (i+2)*sizeof(char*));
 54 76193d7c 2003-09-30 devnull 		if(e->values)
 55 76193d7c 2003-09-30 devnull 			sprint(buf, "%s=%s", e->name,  wtos(e->values, IWS));
 56 76193d7c 2003-09-30 devnull 		else
 57 76193d7c 2003-09-30 devnull 			sprint(buf, "%s=", e->name);
 58 76193d7c 2003-09-30 devnull 		p[i] = strdup(buf);
 59 76193d7c 2003-09-30 devnull 	}
 60 76193d7c 2003-09-30 devnull 	p[i] = 0;
 61 76193d7c 2003-09-30 devnull 	environ = p;
 62 76193d7c 2003-09-30 devnull }
 63 76193d7c 2003-09-30 devnull 
 64 76193d7c 2003-09-30 devnull int
 65 76193d7c 2003-09-30 devnull waitfor(char *msg)
 66 76193d7c 2003-09-30 devnull {
 67 76193d7c 2003-09-30 devnull 	int status;
 68 76193d7c 2003-09-30 devnull 	int pid;
 69 76193d7c 2003-09-30 devnull 
 70 76193d7c 2003-09-30 devnull 	*msg = 0;
 71 76193d7c 2003-09-30 devnull 	pid = wait(&status);
 72 76193d7c 2003-09-30 devnull 	if(pid > 0) {
 73 76193d7c 2003-09-30 devnull 		if(status&0x7f) {
 74 76193d7c 2003-09-30 devnull 			if(status&0x80)
 75 76193d7c 2003-09-30 devnull 				snprint(msg, ERRMAX, "signal %d, core dumped", status&0x7f);
 76 76193d7c 2003-09-30 devnull 			else
 77 76193d7c 2003-09-30 devnull 				snprint(msg, ERRMAX, "signal %d", status&0x7f);
 78 76193d7c 2003-09-30 devnull 		} else if(status&0xff00)
 79 76193d7c 2003-09-30 devnull 			snprint(msg, ERRMAX, "exit(%d)", (status>>8)&0xff);
 80 76193d7c 2003-09-30 devnull 	}
 81 76193d7c 2003-09-30 devnull 	return pid;
 82 76193d7c 2003-09-30 devnull }
 83 76193d7c 2003-09-30 devnull 
 84 76193d7c 2003-09-30 devnull void
 85 76193d7c 2003-09-30 devnull expunge(int pid, char *msg)
 86 76193d7c 2003-09-30 devnull {
 87 76193d7c 2003-09-30 devnull 	if(strcmp(msg, "interrupt"))
 88 76193d7c 2003-09-30 devnull 		kill(pid, SIGINT);
 89 76193d7c 2003-09-30 devnull 	else
 90 76193d7c 2003-09-30 devnull 		kill(pid, SIGHUP);
 91 76193d7c 2003-09-30 devnull }
 92 76193d7c 2003-09-30 devnull 
 93 76193d7c 2003-09-30 devnull int
 94 76193d7c 2003-09-30 devnull execsh(char *args, char *cmd, Bufblock *buf, Envy *e)
 95 76193d7c 2003-09-30 devnull {
 96 76193d7c 2003-09-30 devnull 	char *p;
 97 76193d7c 2003-09-30 devnull 	int tot, n, pid, in[2], out[2];
 98 76193d7c 2003-09-30 devnull 
 99 76193d7c 2003-09-30 devnull 	if(buf && pipe(out) < 0){
100 76193d7c 2003-09-30 devnull 		mkperror("pipe");
101 76193d7c 2003-09-30 devnull 		Exit();
102 76193d7c 2003-09-30 devnull 	}
103 76193d7c 2003-09-30 devnull 	pid = fork();
104 76193d7c 2003-09-30 devnull 	if(pid < 0){
105 76193d7c 2003-09-30 devnull 		mkperror("mk fork");
106 76193d7c 2003-09-30 devnull 		Exit();
107 76193d7c 2003-09-30 devnull 	}
108 76193d7c 2003-09-30 devnull 	if(pid == 0){
109 76193d7c 2003-09-30 devnull 		if(buf)
110 76193d7c 2003-09-30 devnull 			close(out[0]);
111 76193d7c 2003-09-30 devnull 		if(pipe(in) < 0){
112 76193d7c 2003-09-30 devnull 			mkperror("pipe");
113 76193d7c 2003-09-30 devnull 			Exit();
114 76193d7c 2003-09-30 devnull 		}
115 76193d7c 2003-09-30 devnull 		pid = fork();
116 76193d7c 2003-09-30 devnull 		if(pid < 0){
117 76193d7c 2003-09-30 devnull 			mkperror("mk fork");
118 76193d7c 2003-09-30 devnull 			Exit();
119 76193d7c 2003-09-30 devnull 		}
120 76193d7c 2003-09-30 devnull 		if(pid != 0){
121 76193d7c 2003-09-30 devnull 			dup2(in[0], 0);
122 76193d7c 2003-09-30 devnull 			if(buf){
123 76193d7c 2003-09-30 devnull 				dup2(out[1], 1);
124 76193d7c 2003-09-30 devnull 				close(out[1]);
125 76193d7c 2003-09-30 devnull 			}
126 76193d7c 2003-09-30 devnull 			close(in[0]);
127 76193d7c 2003-09-30 devnull 			close(in[1]);
128 76193d7c 2003-09-30 devnull 			if (e)
129 76193d7c 2003-09-30 devnull 				exportenv(e);
130 76193d7c 2003-09-30 devnull 			if(shflags)
131 76193d7c 2003-09-30 devnull 				execl(shell, shellname, shflags, args, 0);
132 76193d7c 2003-09-30 devnull 			else
133 76193d7c 2003-09-30 devnull 				execl(shell, shellname, args, 0);
134 76193d7c 2003-09-30 devnull 			mkperror(shell);
135 76193d7c 2003-09-30 devnull 			_exit(1);
136 76193d7c 2003-09-30 devnull 		}
137 76193d7c 2003-09-30 devnull 		close(out[1]);
138 76193d7c 2003-09-30 devnull 		close(in[0]);
139 76193d7c 2003-09-30 devnull 		if(DEBUG(D_EXEC))
140 76193d7c 2003-09-30 devnull 			fprint(1, "starting: %s\n", cmd);
141 76193d7c 2003-09-30 devnull 		p = cmd+strlen(cmd);
142 76193d7c 2003-09-30 devnull 		while(cmd < p){
143 76193d7c 2003-09-30 devnull 			n = write(in[1], cmd, p-cmd);
144 76193d7c 2003-09-30 devnull 			if(n < 0)
145 76193d7c 2003-09-30 devnull 				break;
146 76193d7c 2003-09-30 devnull 			cmd += n;
147 76193d7c 2003-09-30 devnull 		}
148 76193d7c 2003-09-30 devnull 		close(in[1]);
149 76193d7c 2003-09-30 devnull 		_exit(0);
150 76193d7c 2003-09-30 devnull 	}
151 76193d7c 2003-09-30 devnull 	if(buf){
152 76193d7c 2003-09-30 devnull 		close(out[1]);
153 76193d7c 2003-09-30 devnull 		tot = 0;
154 76193d7c 2003-09-30 devnull 		for(;;){
155 76193d7c 2003-09-30 devnull 			if (buf->current >= buf->end)
156 76193d7c 2003-09-30 devnull 				growbuf(buf);
157 76193d7c 2003-09-30 devnull 			n = read(out[0], buf->current, buf->end-buf->current);
158 76193d7c 2003-09-30 devnull 			if(n <= 0)
159 76193d7c 2003-09-30 devnull 				break;
160 76193d7c 2003-09-30 devnull 			buf->current += n;
161 76193d7c 2003-09-30 devnull 			tot += n;
162 76193d7c 2003-09-30 devnull 		}
163 76193d7c 2003-09-30 devnull 		if (tot && buf->current[-1] == '\n')
164 76193d7c 2003-09-30 devnull 			buf->current--;
165 76193d7c 2003-09-30 devnull 		close(out[0]);
166 76193d7c 2003-09-30 devnull 	}
167 76193d7c 2003-09-30 devnull 	return pid;
168 76193d7c 2003-09-30 devnull }
169 76193d7c 2003-09-30 devnull 
170 76193d7c 2003-09-30 devnull int
171 76193d7c 2003-09-30 devnull pipecmd(char *cmd, Envy *e, int *fd)
172 76193d7c 2003-09-30 devnull {
173 76193d7c 2003-09-30 devnull 	int pid, pfd[2];
174 76193d7c 2003-09-30 devnull 
175 76193d7c 2003-09-30 devnull 	if(DEBUG(D_EXEC))
176 76193d7c 2003-09-30 devnull 		fprint(1, "pipecmd='%s'\n", cmd);/**/
177 76193d7c 2003-09-30 devnull 
178 76193d7c 2003-09-30 devnull 	if(fd && pipe(pfd) < 0){
179 76193d7c 2003-09-30 devnull 		mkperror("pipe");
180 76193d7c 2003-09-30 devnull 		Exit();
181 76193d7c 2003-09-30 devnull 	}
182 76193d7c 2003-09-30 devnull 	pid = fork();
183 76193d7c 2003-09-30 devnull 	if(pid < 0){
184 76193d7c 2003-09-30 devnull 		mkperror("mk fork");
185 76193d7c 2003-09-30 devnull 		Exit();
186 76193d7c 2003-09-30 devnull 	}
187 76193d7c 2003-09-30 devnull 	if(pid == 0){
188 76193d7c 2003-09-30 devnull 		if(fd){
189 76193d7c 2003-09-30 devnull 			close(pfd[0]);
190 76193d7c 2003-09-30 devnull 			dup2(pfd[1], 1);
191 76193d7c 2003-09-30 devnull 			close(pfd[1]);
192 76193d7c 2003-09-30 devnull 		}
193 76193d7c 2003-09-30 devnull 		if(e)
194 76193d7c 2003-09-30 devnull 			exportenv(e);
195 76193d7c 2003-09-30 devnull 		if(shflags)
196 76193d7c 2003-09-30 devnull 			execl(shell, shellname, shflags, "-c", cmd, 0);
197 76193d7c 2003-09-30 devnull 		else
198 76193d7c 2003-09-30 devnull 			execl(shell, shellname, "-c", cmd, 0);
199 76193d7c 2003-09-30 devnull 		mkperror(shell);
200 76193d7c 2003-09-30 devnull 		_exit(1);
201 76193d7c 2003-09-30 devnull 	}
202 76193d7c 2003-09-30 devnull 	if(fd){
203 76193d7c 2003-09-30 devnull 		close(pfd[1]);
204 76193d7c 2003-09-30 devnull 		*fd = pfd[0];
205 76193d7c 2003-09-30 devnull 	}
206 76193d7c 2003-09-30 devnull 	return pid;
207 76193d7c 2003-09-30 devnull }
208 76193d7c 2003-09-30 devnull 
209 76193d7c 2003-09-30 devnull void
210 76193d7c 2003-09-30 devnull Exit(void)
211 76193d7c 2003-09-30 devnull {
212 76193d7c 2003-09-30 devnull 	while(wait(0) >= 0)
213 76193d7c 2003-09-30 devnull 		;
214 76193d7c 2003-09-30 devnull 	exits("error");
215 76193d7c 2003-09-30 devnull }
216 76193d7c 2003-09-30 devnull 
217 76193d7c 2003-09-30 devnull static	struct
218 76193d7c 2003-09-30 devnull {
219 76193d7c 2003-09-30 devnull 	int	sig;
220 76193d7c 2003-09-30 devnull 	char	*msg;
221 76193d7c 2003-09-30 devnull }	sigmsgs[] =
222 76193d7c 2003-09-30 devnull {
223 76193d7c 2003-09-30 devnull 	SIGALRM,	"alarm",
224 76193d7c 2003-09-30 devnull 	SIGFPE,		"sys: fp: fptrap",
225 76193d7c 2003-09-30 devnull 	SIGPIPE,	"sys: write on closed pipe",
226 76193d7c 2003-09-30 devnull 	SIGILL,		"sys: trap: illegal instruction",
227 76193d7c 2003-09-30 devnull 	SIGSEGV,	"sys: segmentation violation",
228 76193d7c 2003-09-30 devnull 	0,		0
229 76193d7c 2003-09-30 devnull };
230 76193d7c 2003-09-30 devnull 
231 76193d7c 2003-09-30 devnull static void
232 76193d7c 2003-09-30 devnull notifyf(int sig)
233 76193d7c 2003-09-30 devnull {
234 76193d7c 2003-09-30 devnull 	int i;
235 76193d7c 2003-09-30 devnull 
236 76193d7c 2003-09-30 devnull 	for(i = 0; sigmsgs[i].msg; i++)
237 76193d7c 2003-09-30 devnull 		if(sigmsgs[i].sig == sig)
238 76193d7c 2003-09-30 devnull 			killchildren(sigmsgs[i].msg);
239 76193d7c 2003-09-30 devnull 
240 76193d7c 2003-09-30 devnull 	/* should never happen */
241 76193d7c 2003-09-30 devnull 	signal(sig, SIG_DFL);
242 76193d7c 2003-09-30 devnull 	kill(getpid(), sig);
243 76193d7c 2003-09-30 devnull }
244 76193d7c 2003-09-30 devnull 
245 76193d7c 2003-09-30 devnull void
246 76193d7c 2003-09-30 devnull catchnotes()
247 76193d7c 2003-09-30 devnull {
248 76193d7c 2003-09-30 devnull 	int i;
249 76193d7c 2003-09-30 devnull 
250 76193d7c 2003-09-30 devnull 	for(i = 0; sigmsgs[i].msg; i++)
251 76193d7c 2003-09-30 devnull 		signal(sigmsgs[i].sig, notifyf);
252 76193d7c 2003-09-30 devnull }
253 76193d7c 2003-09-30 devnull 
254 76193d7c 2003-09-30 devnull char*
255 76193d7c 2003-09-30 devnull maketmp(int *pfd)
256 76193d7c 2003-09-30 devnull {
257 76193d7c 2003-09-30 devnull 	static char temp[] = "/tmp/mkargXXXXXX";
258 76193d7c 2003-09-30 devnull 	static char buf[100];
259 76193d7c 2003-09-30 devnull 	int fd;
260 76193d7c 2003-09-30 devnull 
261 76193d7c 2003-09-30 devnull 	strcpy(buf, temp);
262 76193d7c 2003-09-30 devnull 	fd = mkstemp(buf);
263 76193d7c 2003-09-30 devnull 	if(fd < 0)
264 76193d7c 2003-09-30 devnull 		return 0;
265 76193d7c 2003-09-30 devnull 	*pfd = fd;
266 76193d7c 2003-09-30 devnull 	return buf;
267 76193d7c 2003-09-30 devnull }
268 76193d7c 2003-09-30 devnull 
269 76193d7c 2003-09-30 devnull int
270 76193d7c 2003-09-30 devnull chgtime(char *name)
271 76193d7c 2003-09-30 devnull {
272 76193d7c 2003-09-30 devnull 	if(access(name, 0) >= 0)
273 76193d7c 2003-09-30 devnull 		return utimes(name, 0);
274 76193d7c 2003-09-30 devnull 	return close(creat(name, 0666));
275 76193d7c 2003-09-30 devnull }
276 76193d7c 2003-09-30 devnull 
277 76193d7c 2003-09-30 devnull void
278 76193d7c 2003-09-30 devnull rcopy(char **to, Resub *match, int n)
279 76193d7c 2003-09-30 devnull {
280 76193d7c 2003-09-30 devnull 	int c;
281 76193d7c 2003-09-30 devnull 	char *p;
282 76193d7c 2003-09-30 devnull 
283 76193d7c 2003-09-30 devnull 	*to = match->s.sp;		/* stem0 matches complete target */
284 76193d7c 2003-09-30 devnull 	for(to++, match++; --n > 0; to++, match++){
285 76193d7c 2003-09-30 devnull 		if(match->s.sp && match->e.ep){
286 76193d7c 2003-09-30 devnull 			p = match->e.ep;
287 76193d7c 2003-09-30 devnull 			c = *p;
288 76193d7c 2003-09-30 devnull 			*p = 0;
289 76193d7c 2003-09-30 devnull 			*to = strdup(match->s.sp);
290 76193d7c 2003-09-30 devnull 			*p = c;
291 76193d7c 2003-09-30 devnull 		}
292 76193d7c 2003-09-30 devnull 		else
293 76193d7c 2003-09-30 devnull 			*to = 0;
294 76193d7c 2003-09-30 devnull 	}
295 76193d7c 2003-09-30 devnull }
296 76193d7c 2003-09-30 devnull 
297 76193d7c 2003-09-30 devnull ulong
298 76193d7c 2003-09-30 devnull mkmtime(char *name)
299 76193d7c 2003-09-30 devnull {
300 76193d7c 2003-09-30 devnull 	struct stat st;
301 76193d7c 2003-09-30 devnull 
302 76193d7c 2003-09-30 devnull 	if(stat(name, &st) < 0)
303 76193d7c 2003-09-30 devnull 		return 0;
304 76193d7c 2003-09-30 devnull 
305 76193d7c 2003-09-30 devnull 	return st.st_mtime;
306 76193d7c 2003-09-30 devnull }