1 3d7e9092 2003-10-14 devnull #include <u.h>
  2 3d7e9092 2003-10-14 devnull #include <libc.h>
  3 32f69c36 2003-12-11 devnull #include <fcall.h>
  4 32f69c36 2003-12-11 devnull #include <fs.h>
  5 3d7e9092 2003-10-14 devnull #include "plumb.h"
  6 3d7e9092 2003-10-14 devnull 
  7 3d7e9092 2003-10-14 devnull static char attrbuf[4096];
  8 3d7e9092 2003-10-14 devnull 
  9 b7e6f415 2003-11-23 devnull char *home;
 10 b7e6f415 2003-11-23 devnull 
 11 3d7e9092 2003-10-14 devnull int
 12 3d7e9092 2003-10-14 devnull plumbopen(char *name, int omode)
 13 3d7e9092 2003-10-14 devnull {
 14 32f69c36 2003-12-11 devnull 	Fsys *fs;
 15 32f69c36 2003-12-11 devnull 	int fd;
 16 3d7e9092 2003-10-14 devnull 
 17 32f69c36 2003-12-11 devnull 	fs = nsmount("plumb", "");
 18 32f69c36 2003-12-11 devnull 	if(fs == nil)
 19 3d7e9092 2003-10-14 devnull 		return -1;
 20 32f69c36 2003-12-11 devnull 	fd = fsopenfd(fs, name, omode);
 21 32f69c36 2003-12-11 devnull 	fsunmount(fs);
 22 32f69c36 2003-12-11 devnull 	return fd;
 23 3d7e9092 2003-10-14 devnull }
 24 3d7e9092 2003-10-14 devnull 
 25 3d7e9092 2003-10-14 devnull static int
 26 3d7e9092 2003-10-14 devnull Strlen(char *s)
 27 3d7e9092 2003-10-14 devnull {
 28 3d7e9092 2003-10-14 devnull 	if(s == nil)
 29 3d7e9092 2003-10-14 devnull 		return 0;
 30 3d7e9092 2003-10-14 devnull 	return strlen(s);
 31 3d7e9092 2003-10-14 devnull }
 32 3d7e9092 2003-10-14 devnull 
 33 3d7e9092 2003-10-14 devnull static char*
 34 3d7e9092 2003-10-14 devnull Strcpy(char *s, char *t)
 35 3d7e9092 2003-10-14 devnull {
 36 3d7e9092 2003-10-14 devnull 	if(t == nil)
 37 3d7e9092 2003-10-14 devnull 		return s;
 38 3d7e9092 2003-10-14 devnull 	return strcpy(s, t) + strlen(t);
 39 3d7e9092 2003-10-14 devnull }
 40 3d7e9092 2003-10-14 devnull 
 41 3d7e9092 2003-10-14 devnull /* quote attribute value, if necessary */
 42 3d7e9092 2003-10-14 devnull static char*
 43 3d7e9092 2003-10-14 devnull quote(char *s)
 44 3d7e9092 2003-10-14 devnull {
 45 3d7e9092 2003-10-14 devnull 	char *t;
 46 3d7e9092 2003-10-14 devnull 	int c;
 47 3d7e9092 2003-10-14 devnull 
 48 3d7e9092 2003-10-14 devnull 	if(s == nil){
 49 3d7e9092 2003-10-14 devnull 		attrbuf[0] = '\0';
 50 3d7e9092 2003-10-14 devnull 		return attrbuf;
 51 3d7e9092 2003-10-14 devnull 	}
 52 3d7e9092 2003-10-14 devnull 	if(strpbrk(s, " '=\t") == nil)
 53 3d7e9092 2003-10-14 devnull 		return s;
 54 3d7e9092 2003-10-14 devnull 	t = attrbuf;
 55 3d7e9092 2003-10-14 devnull 	*t++ = '\'';
 56 3d7e9092 2003-10-14 devnull 	while(t < attrbuf+sizeof attrbuf-2){
 57 3d7e9092 2003-10-14 devnull 		c = *s++;
 58 3d7e9092 2003-10-14 devnull 		if(c == '\0')
 59 3d7e9092 2003-10-14 devnull 			break;
 60 3d7e9092 2003-10-14 devnull 		*t++ = c;
 61 3d7e9092 2003-10-14 devnull 		if(c == '\'')
 62 3d7e9092 2003-10-14 devnull 			*t++ = c;
 63 3d7e9092 2003-10-14 devnull 	}
 64 3d7e9092 2003-10-14 devnull 	*t++ = '\'';
 65 3d7e9092 2003-10-14 devnull 	*t = '\0';
 66 3d7e9092 2003-10-14 devnull 	return attrbuf;
 67 3d7e9092 2003-10-14 devnull }
 68 3d7e9092 2003-10-14 devnull 
 69 3d7e9092 2003-10-14 devnull char*
 70 3d7e9092 2003-10-14 devnull plumbpackattr(Plumbattr *attr)
 71 3d7e9092 2003-10-14 devnull {
 72 3d7e9092 2003-10-14 devnull 	int n;
 73 3d7e9092 2003-10-14 devnull 	Plumbattr *a;
 74 3d7e9092 2003-10-14 devnull 	char *s, *t;
 75 3d7e9092 2003-10-14 devnull 
 76 3d7e9092 2003-10-14 devnull 	if(attr == nil)
 77 3d7e9092 2003-10-14 devnull 		return nil;
 78 3d7e9092 2003-10-14 devnull 	n = 0;
 79 3d7e9092 2003-10-14 devnull 	for(a=attr; a!=nil; a=a->next)
 80 3d7e9092 2003-10-14 devnull 		n += Strlen(a->name) + 1 + Strlen(quote(a->value)) + 1;
 81 3d7e9092 2003-10-14 devnull 	s = malloc(n);
 82 3d7e9092 2003-10-14 devnull 	if(s == nil)
 83 3d7e9092 2003-10-14 devnull 		return nil;
 84 3d7e9092 2003-10-14 devnull 	t = s;
 85 3d7e9092 2003-10-14 devnull 	*t = '\0';
 86 3d7e9092 2003-10-14 devnull 	for(a=attr; a!=nil; a=a->next){
 87 3d7e9092 2003-10-14 devnull 		if(t != s)
 88 3d7e9092 2003-10-14 devnull 			*t++ = ' ';
 89 3d7e9092 2003-10-14 devnull 		strcpy(t, a->name);
 90 3d7e9092 2003-10-14 devnull 		strcat(t, "=");
 91 3d7e9092 2003-10-14 devnull 		strcat(t, quote(a->value));
 92 3d7e9092 2003-10-14 devnull 		t += strlen(t);
 93 3d7e9092 2003-10-14 devnull 	}
 94 3d7e9092 2003-10-14 devnull 	if(t > s+n)
 95 3d7e9092 2003-10-14 devnull 		abort();
 96 3d7e9092 2003-10-14 devnull 	return s;
 97 3d7e9092 2003-10-14 devnull }
 98 3d7e9092 2003-10-14 devnull 
 99 3d7e9092 2003-10-14 devnull char*
100 3d7e9092 2003-10-14 devnull plumblookup(Plumbattr *attr, char *name)
101 3d7e9092 2003-10-14 devnull {
102 3d7e9092 2003-10-14 devnull 	while(attr){
103 3d7e9092 2003-10-14 devnull 		if(strcmp(attr->name, name) == 0)
104 3d7e9092 2003-10-14 devnull 			return attr->value;
105 3d7e9092 2003-10-14 devnull 		attr = attr->next;
106 3d7e9092 2003-10-14 devnull 	}
107 3d7e9092 2003-10-14 devnull 	return nil;
108 3d7e9092 2003-10-14 devnull }
109 3d7e9092 2003-10-14 devnull 
110 3d7e9092 2003-10-14 devnull char*
111 3d7e9092 2003-10-14 devnull plumbpack(Plumbmsg *m, int *np)
112 3d7e9092 2003-10-14 devnull {
113 3d7e9092 2003-10-14 devnull 	int n, ndata;
114 3d7e9092 2003-10-14 devnull 	char *buf, *p, *attr;
115 3d7e9092 2003-10-14 devnull 
116 3d7e9092 2003-10-14 devnull 	ndata = m->ndata;
117 3d7e9092 2003-10-14 devnull 	if(ndata < 0)
118 3d7e9092 2003-10-14 devnull 		ndata = Strlen(m->data);
119 3d7e9092 2003-10-14 devnull 	attr = plumbpackattr(m->attr);
120 3d7e9092 2003-10-14 devnull 	n = Strlen(m->src)+1 + Strlen(m->dst)+1 + Strlen(m->wdir)+1 +
121 3d7e9092 2003-10-14 devnull 		Strlen(m->type)+1 + Strlen(attr)+1 + 16 + ndata;
122 3d7e9092 2003-10-14 devnull 	buf = malloc(n+1);	/* +1 for '\0' */
123 3d7e9092 2003-10-14 devnull 	if(buf == nil){
124 3d7e9092 2003-10-14 devnull 		free(attr);
125 3d7e9092 2003-10-14 devnull 		return nil;
126 3d7e9092 2003-10-14 devnull 	}
127 3d7e9092 2003-10-14 devnull 	p = Strcpy(buf, m->src);
128 3d7e9092 2003-10-14 devnull 	*p++ = '\n';
129 3d7e9092 2003-10-14 devnull 	p = Strcpy(p, m->dst);
130 3d7e9092 2003-10-14 devnull 	*p++ = '\n';
131 3d7e9092 2003-10-14 devnull 	p = Strcpy(p, m->wdir);
132 3d7e9092 2003-10-14 devnull 	*p++ = '\n';
133 3d7e9092 2003-10-14 devnull 	p = Strcpy(p, m->type);
134 3d7e9092 2003-10-14 devnull 	*p++ = '\n';
135 3d7e9092 2003-10-14 devnull 	p = Strcpy(p, attr);
136 3d7e9092 2003-10-14 devnull 	*p++ = '\n';
137 3d7e9092 2003-10-14 devnull 	p += sprint(p, "%d\n", ndata);
138 3d7e9092 2003-10-14 devnull 	memmove(p, m->data, ndata);
139 3d7e9092 2003-10-14 devnull 	*np = (p-buf)+ndata;
140 3d7e9092 2003-10-14 devnull 	buf[*np] = '\0';	/* null terminate just in case */
141 3d7e9092 2003-10-14 devnull 	if(*np >= n+1)
142 3d7e9092 2003-10-14 devnull 		abort();
143 3d7e9092 2003-10-14 devnull 	free(attr);
144 3d7e9092 2003-10-14 devnull 	return buf;
145 3d7e9092 2003-10-14 devnull }
146 3d7e9092 2003-10-14 devnull 
147 3d7e9092 2003-10-14 devnull int
148 3d7e9092 2003-10-14 devnull plumbsend(int fd, Plumbmsg *m)
149 3d7e9092 2003-10-14 devnull {
150 3d7e9092 2003-10-14 devnull 	char *buf;
151 3d7e9092 2003-10-14 devnull 	int n;
152 3d7e9092 2003-10-14 devnull 
153 3d7e9092 2003-10-14 devnull 	buf = plumbpack(m, &n);
154 3d7e9092 2003-10-14 devnull 	if(buf == nil)
155 3d7e9092 2003-10-14 devnull 		return -1;
156 3d7e9092 2003-10-14 devnull 	n = write(fd, buf, n);
157 3d7e9092 2003-10-14 devnull 	free(buf);
158 3d7e9092 2003-10-14 devnull 	return n;
159 3d7e9092 2003-10-14 devnull }
160 3d7e9092 2003-10-14 devnull 
161 3d7e9092 2003-10-14 devnull static int
162 3d7e9092 2003-10-14 devnull plumbline(char **linep, char *buf, int i, int n, int *bad)
163 3d7e9092 2003-10-14 devnull {
164 3d7e9092 2003-10-14 devnull 	int starti;
165 3d7e9092 2003-10-14 devnull 	char *p;
166 3d7e9092 2003-10-14 devnull 
167 3d7e9092 2003-10-14 devnull 	if(*bad)
168 3d7e9092 2003-10-14 devnull 		return i;
169 3d7e9092 2003-10-14 devnull 	starti = i;
170 3d7e9092 2003-10-14 devnull 	while(i<n && buf[i]!='\n')
171 3d7e9092 2003-10-14 devnull 		i++;
172 3d7e9092 2003-10-14 devnull 	if(i == n)
173 3d7e9092 2003-10-14 devnull 		*bad = 1;
174 3d7e9092 2003-10-14 devnull 	else{
175 3d7e9092 2003-10-14 devnull 		p = malloc((i-starti) + 1);
176 3d7e9092 2003-10-14 devnull 		if(p == nil)
177 3d7e9092 2003-10-14 devnull 			*bad = 1;
178 3d7e9092 2003-10-14 devnull 		else{
179 3d7e9092 2003-10-14 devnull 			memmove(p, buf+starti, i-starti);
180 3d7e9092 2003-10-14 devnull 			p[i-starti] = '\0';
181 3d7e9092 2003-10-14 devnull 		}
182 3d7e9092 2003-10-14 devnull 		*linep = p;
183 3d7e9092 2003-10-14 devnull 		i++;
184 3d7e9092 2003-10-14 devnull 	}
185 3d7e9092 2003-10-14 devnull 	return i;
186 3d7e9092 2003-10-14 devnull }
187 3d7e9092 2003-10-14 devnull 
188 3d7e9092 2003-10-14 devnull void
189 3d7e9092 2003-10-14 devnull plumbfree(Plumbmsg *m)
190 3d7e9092 2003-10-14 devnull {
191 3d7e9092 2003-10-14 devnull 	Plumbattr *a, *next;
192 3d7e9092 2003-10-14 devnull 
193 3d7e9092 2003-10-14 devnull 	free(m->src);
194 3d7e9092 2003-10-14 devnull 	free(m->dst);
195 3d7e9092 2003-10-14 devnull 	free(m->wdir);
196 3d7e9092 2003-10-14 devnull 	free(m->type);
197 3d7e9092 2003-10-14 devnull 	for(a=m->attr; a!=nil; a=next){
198 3d7e9092 2003-10-14 devnull 		next = a->next;
199 3d7e9092 2003-10-14 devnull 		free(a->name);
200 3d7e9092 2003-10-14 devnull 		free(a->value);
201 3d7e9092 2003-10-14 devnull 		free(a);
202 3d7e9092 2003-10-14 devnull 	}
203 3d7e9092 2003-10-14 devnull 	free(m->data);
204 3d7e9092 2003-10-14 devnull 	free(m);
205 3d7e9092 2003-10-14 devnull }
206 3d7e9092 2003-10-14 devnull 
207 3d7e9092 2003-10-14 devnull Plumbattr*
208 3d7e9092 2003-10-14 devnull plumbunpackattr(char *p)
209 3d7e9092 2003-10-14 devnull {
210 3d7e9092 2003-10-14 devnull 	Plumbattr *attr, *prev, *a;
211 3d7e9092 2003-10-14 devnull 	char *q, *v;
212 3d7e9092 2003-10-14 devnull 	int c, quoting;
213 3d7e9092 2003-10-14 devnull 
214 3d7e9092 2003-10-14 devnull 	attr = prev = nil;
215 3d7e9092 2003-10-14 devnull 	while(*p!='\0' && *p!='\n'){
216 3d7e9092 2003-10-14 devnull 		while(*p==' ' || *p=='\t')
217 3d7e9092 2003-10-14 devnull 			p++;
218 3d7e9092 2003-10-14 devnull 		if(*p == '\0')
219 3d7e9092 2003-10-14 devnull 			break;
220 3d7e9092 2003-10-14 devnull 		for(q=p; *q!='\0' && *q!='\n' && *q!=' ' && *q!='\t'; q++)
221 3d7e9092 2003-10-14 devnull 			if(*q == '=')
222 3d7e9092 2003-10-14 devnull 				break;
223 3d7e9092 2003-10-14 devnull 		if(*q != '=')
224 3d7e9092 2003-10-14 devnull 			break;	/* malformed attribute */
225 3d7e9092 2003-10-14 devnull 		a = malloc(sizeof(Plumbattr));
226 3d7e9092 2003-10-14 devnull 		if(a == nil)
227 3d7e9092 2003-10-14 devnull 			break;
228 3d7e9092 2003-10-14 devnull 		a->name = malloc(q-p+1);
229 3d7e9092 2003-10-14 devnull 		if(a->name == nil){
230 3d7e9092 2003-10-14 devnull 			free(a);
231 3d7e9092 2003-10-14 devnull 			break;
232 3d7e9092 2003-10-14 devnull 		}
233 3d7e9092 2003-10-14 devnull 		memmove(a->name, p, q-p);
234 3d7e9092 2003-10-14 devnull 		a->name[q-p] = '\0';
235 3d7e9092 2003-10-14 devnull 		/* process quotes in value */
236 3d7e9092 2003-10-14 devnull 		q++;	/* skip '=' */
237 3d7e9092 2003-10-14 devnull 		v = attrbuf;
238 3d7e9092 2003-10-14 devnull 		quoting = 0;
239 3d7e9092 2003-10-14 devnull 		while(*q!='\0' && *q!='\n'){
240 3d7e9092 2003-10-14 devnull 			if(v >= attrbuf+sizeof attrbuf)
241 3d7e9092 2003-10-14 devnull 				break;
242 3d7e9092 2003-10-14 devnull 			c = *q++;
243 3d7e9092 2003-10-14 devnull 			if(quoting){
244 3d7e9092 2003-10-14 devnull 				if(c == '\''){
245 3d7e9092 2003-10-14 devnull 					if(*q == '\'')
246 3d7e9092 2003-10-14 devnull 						q++;
247 3d7e9092 2003-10-14 devnull 					else{
248 3d7e9092 2003-10-14 devnull 						quoting = 0;
249 3d7e9092 2003-10-14 devnull 						continue;
250 3d7e9092 2003-10-14 devnull 					}
251 3d7e9092 2003-10-14 devnull 				}
252 3d7e9092 2003-10-14 devnull 			}else{
253 3d7e9092 2003-10-14 devnull 				if(c==' ' || c=='\t')
254 3d7e9092 2003-10-14 devnull 					break;
255 3d7e9092 2003-10-14 devnull 				if(c == '\''){
256 3d7e9092 2003-10-14 devnull 					quoting = 1;
257 3d7e9092 2003-10-14 devnull 					continue;
258 3d7e9092 2003-10-14 devnull 				}
259 3d7e9092 2003-10-14 devnull 			}
260 3d7e9092 2003-10-14 devnull 			*v++ = c;
261 3d7e9092 2003-10-14 devnull 		}
262 3d7e9092 2003-10-14 devnull 		a->value = malloc(v-attrbuf+1);
263 3d7e9092 2003-10-14 devnull 		if(a->value == nil){
264 3d7e9092 2003-10-14 devnull 			free(a->name);
265 3d7e9092 2003-10-14 devnull 			free(a);
266 3d7e9092 2003-10-14 devnull 			break;
267 3d7e9092 2003-10-14 devnull 		}
268 3d7e9092 2003-10-14 devnull 		memmove(a->value, attrbuf, v-attrbuf);
269 3d7e9092 2003-10-14 devnull 		a->value[v-attrbuf] = '\0';
270 3d7e9092 2003-10-14 devnull 		a->next = nil;
271 3d7e9092 2003-10-14 devnull 		if(prev == nil)
272 3d7e9092 2003-10-14 devnull 			attr = a;
273 3d7e9092 2003-10-14 devnull 		else
274 3d7e9092 2003-10-14 devnull 			prev->next = a;
275 3d7e9092 2003-10-14 devnull 		prev = a;
276 3d7e9092 2003-10-14 devnull 		p = q;
277 3d7e9092 2003-10-14 devnull 	}
278 3d7e9092 2003-10-14 devnull 	return attr;
279 3d7e9092 2003-10-14 devnull }
280 3d7e9092 2003-10-14 devnull 
281 3d7e9092 2003-10-14 devnull Plumbattr*
282 3d7e9092 2003-10-14 devnull plumbaddattr(Plumbattr *attr, Plumbattr *new)
283 3d7e9092 2003-10-14 devnull {
284 3d7e9092 2003-10-14 devnull 	Plumbattr *l;
285 3d7e9092 2003-10-14 devnull 
286 3d7e9092 2003-10-14 devnull 	l = attr;
287 3d7e9092 2003-10-14 devnull 	if(l == nil)
288 3d7e9092 2003-10-14 devnull 		return new;
289 3d7e9092 2003-10-14 devnull 	while(l->next != nil)
290 3d7e9092 2003-10-14 devnull 		l = l->next;
291 3d7e9092 2003-10-14 devnull 	l->next = new;
292 3d7e9092 2003-10-14 devnull 	return attr;
293 3d7e9092 2003-10-14 devnull }
294 3d7e9092 2003-10-14 devnull 
295 3d7e9092 2003-10-14 devnull Plumbattr*
296 3d7e9092 2003-10-14 devnull plumbdelattr(Plumbattr *attr, char *name)
297 3d7e9092 2003-10-14 devnull {
298 3d7e9092 2003-10-14 devnull 	Plumbattr *l, *prev;
299 3d7e9092 2003-10-14 devnull 
300 3d7e9092 2003-10-14 devnull 	prev = nil;
301 3d7e9092 2003-10-14 devnull 	for(l=attr; l!=nil; l=l->next){
302 3d7e9092 2003-10-14 devnull 		if(strcmp(name, l->name) == 0)
303 3d7e9092 2003-10-14 devnull 			break;
304 3d7e9092 2003-10-14 devnull 		prev = l;
305 3d7e9092 2003-10-14 devnull 	}
306 3d7e9092 2003-10-14 devnull 	if(l == nil)
307 3d7e9092 2003-10-14 devnull 		return nil;
308 3d7e9092 2003-10-14 devnull 	if(prev)
309 3d7e9092 2003-10-14 devnull 		prev->next = l->next;
310 3d7e9092 2003-10-14 devnull 	else
311 3d7e9092 2003-10-14 devnull 		attr = l->next;
312 3d7e9092 2003-10-14 devnull 	free(l->name);
313 3d7e9092 2003-10-14 devnull 	free(l->value);
314 3d7e9092 2003-10-14 devnull 	free(l);
315 3d7e9092 2003-10-14 devnull 	return attr;
316 3d7e9092 2003-10-14 devnull }
317 3d7e9092 2003-10-14 devnull 
318 3d7e9092 2003-10-14 devnull Plumbmsg*
319 3d7e9092 2003-10-14 devnull plumbunpackpartial(char *buf, int n, int *morep)
320 3d7e9092 2003-10-14 devnull {
321 3d7e9092 2003-10-14 devnull 	Plumbmsg *m;
322 3d7e9092 2003-10-14 devnull 	int i, bad;
323 3d7e9092 2003-10-14 devnull 	char *ntext, *attr;
324 3d7e9092 2003-10-14 devnull 
325 3d7e9092 2003-10-14 devnull 	m = malloc(sizeof(Plumbmsg));
326 3d7e9092 2003-10-14 devnull 	if(m == nil)
327 3d7e9092 2003-10-14 devnull 		return nil;
328 3d7e9092 2003-10-14 devnull 	memset(m, 0, sizeof(Plumbmsg));
329 3d7e9092 2003-10-14 devnull 	if(morep != nil)
330 3d7e9092 2003-10-14 devnull 		*morep = 0;
331 3d7e9092 2003-10-14 devnull 	bad = 0;
332 3d7e9092 2003-10-14 devnull 	i = plumbline(&m->src, buf, 0, n, &bad);
333 3d7e9092 2003-10-14 devnull 	i = plumbline(&m->dst, buf, i, n, &bad);
334 3d7e9092 2003-10-14 devnull 	i = plumbline(&m->wdir, buf, i, n, &bad);
335 3d7e9092 2003-10-14 devnull 	i = plumbline(&m->type, buf, i, n, &bad);
336 3d7e9092 2003-10-14 devnull 	i = plumbline(&attr, buf, i, n, &bad);
337 3d7e9092 2003-10-14 devnull 	m->attr = plumbunpackattr(attr);
338 3d7e9092 2003-10-14 devnull 	free(attr);
339 3d7e9092 2003-10-14 devnull 	i = plumbline(&ntext, buf, i, n, &bad);
340 3d7e9092 2003-10-14 devnull 	m->ndata = atoi(ntext);
341 3d7e9092 2003-10-14 devnull 	if(m->ndata != n-i){
342 3d7e9092 2003-10-14 devnull 		bad = 1;
343 3d7e9092 2003-10-14 devnull 		if(morep!=nil && m->ndata>n-i)
344 3d7e9092 2003-10-14 devnull 			*morep = m->ndata - (n-i);
345 3d7e9092 2003-10-14 devnull 	}
346 3d7e9092 2003-10-14 devnull 	free(ntext);
347 3d7e9092 2003-10-14 devnull 	if(!bad){
348 3d7e9092 2003-10-14 devnull 		m->data = malloc(n-i+1);	/* +1 for '\0' */
349 3d7e9092 2003-10-14 devnull 		if(m->data == nil)
350 3d7e9092 2003-10-14 devnull 			bad = 1;
351 3d7e9092 2003-10-14 devnull 		else{
352 3d7e9092 2003-10-14 devnull 			memmove(m->data, buf+i, m->ndata);
353 3d7e9092 2003-10-14 devnull 			m->ndata = n-i;
354 3d7e9092 2003-10-14 devnull 			/* null-terminate in case it's text */
355 3d7e9092 2003-10-14 devnull 			m->data[m->ndata] = '\0';
356 3d7e9092 2003-10-14 devnull 		}
357 3d7e9092 2003-10-14 devnull 	}
358 3d7e9092 2003-10-14 devnull 	if(bad){
359 3d7e9092 2003-10-14 devnull 		plumbfree(m);
360 3d7e9092 2003-10-14 devnull 		m = nil;
361 3d7e9092 2003-10-14 devnull 	}
362 3d7e9092 2003-10-14 devnull 	return m;
363 3d7e9092 2003-10-14 devnull }
364 3d7e9092 2003-10-14 devnull 
365 3d7e9092 2003-10-14 devnull Plumbmsg*
366 3d7e9092 2003-10-14 devnull plumbunpack(char *buf, int n)
367 3d7e9092 2003-10-14 devnull {
368 3d7e9092 2003-10-14 devnull 	return plumbunpackpartial(buf, n, nil);
369 3d7e9092 2003-10-14 devnull }
370 3d7e9092 2003-10-14 devnull 
371 3d7e9092 2003-10-14 devnull Plumbmsg*
372 3d7e9092 2003-10-14 devnull plumbrecv(int fd)
373 3d7e9092 2003-10-14 devnull {
374 3d7e9092 2003-10-14 devnull 	char *buf;
375 3d7e9092 2003-10-14 devnull 	Plumbmsg *m;
376 3d7e9092 2003-10-14 devnull 	int n, more;
377 3d7e9092 2003-10-14 devnull 
378 3d7e9092 2003-10-14 devnull 	buf = malloc(8192);
379 3d7e9092 2003-10-14 devnull 	if(buf == nil)
380 3d7e9092 2003-10-14 devnull 		return nil;
381 3d7e9092 2003-10-14 devnull 	n = read(fd, buf, 8192);
382 3d7e9092 2003-10-14 devnull 	m = nil;
383 3d7e9092 2003-10-14 devnull 	if(n > 0){
384 3d7e9092 2003-10-14 devnull 		m = plumbunpackpartial(buf, n, &more);
385 3d7e9092 2003-10-14 devnull 		if(m==nil && more>0){
386 3d7e9092 2003-10-14 devnull 			/* we now know how many more bytes to read for complete message */
387 3d7e9092 2003-10-14 devnull 			buf = realloc(buf, n+more);
388 3d7e9092 2003-10-14 devnull 			if(buf == nil)
389 3d7e9092 2003-10-14 devnull 				return nil;
390 3d7e9092 2003-10-14 devnull 			if(readn(fd, buf+n, more) == more)
391 3d7e9092 2003-10-14 devnull 				m = plumbunpackpartial(buf, n+more, nil);
392 3d7e9092 2003-10-14 devnull 		}
393 3d7e9092 2003-10-14 devnull 	}
394 3d7e9092 2003-10-14 devnull 	free(buf);
395 3d7e9092 2003-10-14 devnull 	return m;
396 3d7e9092 2003-10-14 devnull }