1 3d7e9092 2003-10-14 devnull #include <u.h>
  2 3d7e9092 2003-10-14 devnull #include <libc.h>
  3 3d7e9092 2003-10-14 devnull #include "plumb.h"
  4 3d7e9092 2003-10-14 devnull 
  5 3d7e9092 2003-10-14 devnull static char attrbuf[4096];
  6 3d7e9092 2003-10-14 devnull 
  7 b7e6f415 2003-11-23 devnull char *home;
  8 b7e6f415 2003-11-23 devnull 
  9 3d7e9092 2003-10-14 devnull int
 10 3d7e9092 2003-10-14 devnull plumbopen(char *name, int omode)
 11 3d7e9092 2003-10-14 devnull {
 12 3d7e9092 2003-10-14 devnull 	int fd, f;
 13 3d7e9092 2003-10-14 devnull 	char *s;
 14 b7e6f415 2003-11-23 devnull 	char buf[256];
 15 3d7e9092 2003-10-14 devnull 
 16 3d7e9092 2003-10-14 devnull 	if(name[0] == '/')
 17 3d7e9092 2003-10-14 devnull 		return open(name, omode);
 18 b7e6f415 2003-11-23 devnull 	if(home == nil){
 19 b7e6f415 2003-11-23 devnull 		home = getenv("HOME");
 20 b7e6f415 2003-11-23 devnull 		if(home == nil)
 21 b7e6f415 2003-11-23 devnull 			return -1;
 22 b7e6f415 2003-11-23 devnull 	}
 23 b7e6f415 2003-11-23 devnull 	snprint(buf, sizeof buf, "%s/mnt/plumb", home);
 24 b7e6f415 2003-11-23 devnull /*	fd = open(buf, omode);
 25 3d7e9092 2003-10-14 devnull 	if(fd >= 0)
 26 3d7e9092 2003-10-14 devnull 		return fd;
 27 3d7e9092 2003-10-14 devnull 	snprint(buf, sizeof buf, "/mnt/term/mnt/plumb/%s", name);
 28 3d7e9092 2003-10-14 devnull 	fd = open(buf, omode);
 29 3d7e9092 2003-10-14 devnull 	if(fd >= 0)
 30 3d7e9092 2003-10-14 devnull 		return fd;
 31 b7e6f415 2003-11-23 devnull 	/* try mounting service * /
 32 3d7e9092 2003-10-14 devnull 	s = getenv("plumbsrv");
 33 3d7e9092 2003-10-14 devnull 	if(s == nil)
 34 3d7e9092 2003-10-14 devnull 		return -1;
 35 3d7e9092 2003-10-14 devnull 	snprint(buf, sizeof buf, "/mnt/plumb/%s", name);
 36 b7e6f415 2003-11-23 devnull */
 37 3d7e9092 2003-10-14 devnull 	return open(buf, omode);
 38 3d7e9092 2003-10-14 devnull }
 39 3d7e9092 2003-10-14 devnull 
 40 3d7e9092 2003-10-14 devnull static int
 41 3d7e9092 2003-10-14 devnull Strlen(char *s)
 42 3d7e9092 2003-10-14 devnull {
 43 3d7e9092 2003-10-14 devnull 	if(s == nil)
 44 3d7e9092 2003-10-14 devnull 		return 0;
 45 3d7e9092 2003-10-14 devnull 	return strlen(s);
 46 3d7e9092 2003-10-14 devnull }
 47 3d7e9092 2003-10-14 devnull 
 48 3d7e9092 2003-10-14 devnull static char*
 49 3d7e9092 2003-10-14 devnull Strcpy(char *s, char *t)
 50 3d7e9092 2003-10-14 devnull {
 51 3d7e9092 2003-10-14 devnull 	if(t == nil)
 52 3d7e9092 2003-10-14 devnull 		return s;
 53 3d7e9092 2003-10-14 devnull 	return strcpy(s, t) + strlen(t);
 54 3d7e9092 2003-10-14 devnull }
 55 3d7e9092 2003-10-14 devnull 
 56 3d7e9092 2003-10-14 devnull /* quote attribute value, if necessary */
 57 3d7e9092 2003-10-14 devnull static char*
 58 3d7e9092 2003-10-14 devnull quote(char *s)
 59 3d7e9092 2003-10-14 devnull {
 60 3d7e9092 2003-10-14 devnull 	char *t;
 61 3d7e9092 2003-10-14 devnull 	int c;
 62 3d7e9092 2003-10-14 devnull 
 63 3d7e9092 2003-10-14 devnull 	if(s == nil){
 64 3d7e9092 2003-10-14 devnull 		attrbuf[0] = '\0';
 65 3d7e9092 2003-10-14 devnull 		return attrbuf;
 66 3d7e9092 2003-10-14 devnull 	}
 67 3d7e9092 2003-10-14 devnull 	if(strpbrk(s, " '=\t") == nil)
 68 3d7e9092 2003-10-14 devnull 		return s;
 69 3d7e9092 2003-10-14 devnull 	t = attrbuf;
 70 3d7e9092 2003-10-14 devnull 	*t++ = '\'';
 71 3d7e9092 2003-10-14 devnull 	while(t < attrbuf+sizeof attrbuf-2){
 72 3d7e9092 2003-10-14 devnull 		c = *s++;
 73 3d7e9092 2003-10-14 devnull 		if(c == '\0')
 74 3d7e9092 2003-10-14 devnull 			break;
 75 3d7e9092 2003-10-14 devnull 		*t++ = c;
 76 3d7e9092 2003-10-14 devnull 		if(c == '\'')
 77 3d7e9092 2003-10-14 devnull 			*t++ = c;
 78 3d7e9092 2003-10-14 devnull 	}
 79 3d7e9092 2003-10-14 devnull 	*t++ = '\'';
 80 3d7e9092 2003-10-14 devnull 	*t = '\0';
 81 3d7e9092 2003-10-14 devnull 	return attrbuf;
 82 3d7e9092 2003-10-14 devnull }
 83 3d7e9092 2003-10-14 devnull 
 84 3d7e9092 2003-10-14 devnull char*
 85 3d7e9092 2003-10-14 devnull plumbpackattr(Plumbattr *attr)
 86 3d7e9092 2003-10-14 devnull {
 87 3d7e9092 2003-10-14 devnull 	int n;
 88 3d7e9092 2003-10-14 devnull 	Plumbattr *a;
 89 3d7e9092 2003-10-14 devnull 	char *s, *t;
 90 3d7e9092 2003-10-14 devnull 
 91 3d7e9092 2003-10-14 devnull 	if(attr == nil)
 92 3d7e9092 2003-10-14 devnull 		return nil;
 93 3d7e9092 2003-10-14 devnull 	n = 0;
 94 3d7e9092 2003-10-14 devnull 	for(a=attr; a!=nil; a=a->next)
 95 3d7e9092 2003-10-14 devnull 		n += Strlen(a->name) + 1 + Strlen(quote(a->value)) + 1;
 96 3d7e9092 2003-10-14 devnull 	s = malloc(n);
 97 3d7e9092 2003-10-14 devnull 	if(s == nil)
 98 3d7e9092 2003-10-14 devnull 		return nil;
 99 3d7e9092 2003-10-14 devnull 	t = s;
100 3d7e9092 2003-10-14 devnull 	*t = '\0';
101 3d7e9092 2003-10-14 devnull 	for(a=attr; a!=nil; a=a->next){
102 3d7e9092 2003-10-14 devnull 		if(t != s)
103 3d7e9092 2003-10-14 devnull 			*t++ = ' ';
104 3d7e9092 2003-10-14 devnull 		strcpy(t, a->name);
105 3d7e9092 2003-10-14 devnull 		strcat(t, "=");
106 3d7e9092 2003-10-14 devnull 		strcat(t, quote(a->value));
107 3d7e9092 2003-10-14 devnull 		t += strlen(t);
108 3d7e9092 2003-10-14 devnull 	}
109 3d7e9092 2003-10-14 devnull 	if(t > s+n)
110 3d7e9092 2003-10-14 devnull 		abort();
111 3d7e9092 2003-10-14 devnull 	return s;
112 3d7e9092 2003-10-14 devnull }
113 3d7e9092 2003-10-14 devnull 
114 3d7e9092 2003-10-14 devnull char*
115 3d7e9092 2003-10-14 devnull plumblookup(Plumbattr *attr, char *name)
116 3d7e9092 2003-10-14 devnull {
117 3d7e9092 2003-10-14 devnull 	while(attr){
118 3d7e9092 2003-10-14 devnull 		if(strcmp(attr->name, name) == 0)
119 3d7e9092 2003-10-14 devnull 			return attr->value;
120 3d7e9092 2003-10-14 devnull 		attr = attr->next;
121 3d7e9092 2003-10-14 devnull 	}
122 3d7e9092 2003-10-14 devnull 	return nil;
123 3d7e9092 2003-10-14 devnull }
124 3d7e9092 2003-10-14 devnull 
125 3d7e9092 2003-10-14 devnull char*
126 3d7e9092 2003-10-14 devnull plumbpack(Plumbmsg *m, int *np)
127 3d7e9092 2003-10-14 devnull {
128 3d7e9092 2003-10-14 devnull 	int n, ndata;
129 3d7e9092 2003-10-14 devnull 	char *buf, *p, *attr;
130 3d7e9092 2003-10-14 devnull 
131 3d7e9092 2003-10-14 devnull 	ndata = m->ndata;
132 3d7e9092 2003-10-14 devnull 	if(ndata < 0)
133 3d7e9092 2003-10-14 devnull 		ndata = Strlen(m->data);
134 3d7e9092 2003-10-14 devnull 	attr = plumbpackattr(m->attr);
135 3d7e9092 2003-10-14 devnull 	n = Strlen(m->src)+1 + Strlen(m->dst)+1 + Strlen(m->wdir)+1 +
136 3d7e9092 2003-10-14 devnull 		Strlen(m->type)+1 + Strlen(attr)+1 + 16 + ndata;
137 3d7e9092 2003-10-14 devnull 	buf = malloc(n+1);	/* +1 for '\0' */
138 3d7e9092 2003-10-14 devnull 	if(buf == nil){
139 3d7e9092 2003-10-14 devnull 		free(attr);
140 3d7e9092 2003-10-14 devnull 		return nil;
141 3d7e9092 2003-10-14 devnull 	}
142 3d7e9092 2003-10-14 devnull 	p = Strcpy(buf, m->src);
143 3d7e9092 2003-10-14 devnull 	*p++ = '\n';
144 3d7e9092 2003-10-14 devnull 	p = Strcpy(p, m->dst);
145 3d7e9092 2003-10-14 devnull 	*p++ = '\n';
146 3d7e9092 2003-10-14 devnull 	p = Strcpy(p, m->wdir);
147 3d7e9092 2003-10-14 devnull 	*p++ = '\n';
148 3d7e9092 2003-10-14 devnull 	p = Strcpy(p, m->type);
149 3d7e9092 2003-10-14 devnull 	*p++ = '\n';
150 3d7e9092 2003-10-14 devnull 	p = Strcpy(p, attr);
151 3d7e9092 2003-10-14 devnull 	*p++ = '\n';
152 3d7e9092 2003-10-14 devnull 	p += sprint(p, "%d\n", ndata);
153 3d7e9092 2003-10-14 devnull 	memmove(p, m->data, ndata);
154 3d7e9092 2003-10-14 devnull 	*np = (p-buf)+ndata;
155 3d7e9092 2003-10-14 devnull 	buf[*np] = '\0';	/* null terminate just in case */
156 3d7e9092 2003-10-14 devnull 	if(*np >= n+1)
157 3d7e9092 2003-10-14 devnull 		abort();
158 3d7e9092 2003-10-14 devnull 	free(attr);
159 3d7e9092 2003-10-14 devnull 	return buf;
160 3d7e9092 2003-10-14 devnull }
161 3d7e9092 2003-10-14 devnull 
162 3d7e9092 2003-10-14 devnull int
163 3d7e9092 2003-10-14 devnull plumbsend(int fd, Plumbmsg *m)
164 3d7e9092 2003-10-14 devnull {
165 3d7e9092 2003-10-14 devnull 	char *buf;
166 3d7e9092 2003-10-14 devnull 	int n;
167 3d7e9092 2003-10-14 devnull 
168 3d7e9092 2003-10-14 devnull 	buf = plumbpack(m, &n);
169 3d7e9092 2003-10-14 devnull 	if(buf == nil)
170 3d7e9092 2003-10-14 devnull 		return -1;
171 3d7e9092 2003-10-14 devnull 	n = write(fd, buf, n);
172 3d7e9092 2003-10-14 devnull 	free(buf);
173 3d7e9092 2003-10-14 devnull 	return n;
174 3d7e9092 2003-10-14 devnull }
175 3d7e9092 2003-10-14 devnull 
176 3d7e9092 2003-10-14 devnull static int
177 3d7e9092 2003-10-14 devnull plumbline(char **linep, char *buf, int i, int n, int *bad)
178 3d7e9092 2003-10-14 devnull {
179 3d7e9092 2003-10-14 devnull 	int starti;
180 3d7e9092 2003-10-14 devnull 	char *p;
181 3d7e9092 2003-10-14 devnull 
182 3d7e9092 2003-10-14 devnull 	if(*bad)
183 3d7e9092 2003-10-14 devnull 		return i;
184 3d7e9092 2003-10-14 devnull 	starti = i;
185 3d7e9092 2003-10-14 devnull 	while(i<n && buf[i]!='\n')
186 3d7e9092 2003-10-14 devnull 		i++;
187 3d7e9092 2003-10-14 devnull 	if(i == n)
188 3d7e9092 2003-10-14 devnull 		*bad = 1;
189 3d7e9092 2003-10-14 devnull 	else{
190 3d7e9092 2003-10-14 devnull 		p = malloc((i-starti) + 1);
191 3d7e9092 2003-10-14 devnull 		if(p == nil)
192 3d7e9092 2003-10-14 devnull 			*bad = 1;
193 3d7e9092 2003-10-14 devnull 		else{
194 3d7e9092 2003-10-14 devnull 			memmove(p, buf+starti, i-starti);
195 3d7e9092 2003-10-14 devnull 			p[i-starti] = '\0';
196 3d7e9092 2003-10-14 devnull 		}
197 3d7e9092 2003-10-14 devnull 		*linep = p;
198 3d7e9092 2003-10-14 devnull 		i++;
199 3d7e9092 2003-10-14 devnull 	}
200 3d7e9092 2003-10-14 devnull 	return i;
201 3d7e9092 2003-10-14 devnull }
202 3d7e9092 2003-10-14 devnull 
203 3d7e9092 2003-10-14 devnull void
204 3d7e9092 2003-10-14 devnull plumbfree(Plumbmsg *m)
205 3d7e9092 2003-10-14 devnull {
206 3d7e9092 2003-10-14 devnull 	Plumbattr *a, *next;
207 3d7e9092 2003-10-14 devnull 
208 3d7e9092 2003-10-14 devnull 	free(m->src);
209 3d7e9092 2003-10-14 devnull 	free(m->dst);
210 3d7e9092 2003-10-14 devnull 	free(m->wdir);
211 3d7e9092 2003-10-14 devnull 	free(m->type);
212 3d7e9092 2003-10-14 devnull 	for(a=m->attr; a!=nil; a=next){
213 3d7e9092 2003-10-14 devnull 		next = a->next;
214 3d7e9092 2003-10-14 devnull 		free(a->name);
215 3d7e9092 2003-10-14 devnull 		free(a->value);
216 3d7e9092 2003-10-14 devnull 		free(a);
217 3d7e9092 2003-10-14 devnull 	}
218 3d7e9092 2003-10-14 devnull 	free(m->data);
219 3d7e9092 2003-10-14 devnull 	free(m);
220 3d7e9092 2003-10-14 devnull }
221 3d7e9092 2003-10-14 devnull 
222 3d7e9092 2003-10-14 devnull Plumbattr*
223 3d7e9092 2003-10-14 devnull plumbunpackattr(char *p)
224 3d7e9092 2003-10-14 devnull {
225 3d7e9092 2003-10-14 devnull 	Plumbattr *attr, *prev, *a;
226 3d7e9092 2003-10-14 devnull 	char *q, *v;
227 3d7e9092 2003-10-14 devnull 	int c, quoting;
228 3d7e9092 2003-10-14 devnull 
229 3d7e9092 2003-10-14 devnull 	attr = prev = nil;
230 3d7e9092 2003-10-14 devnull 	while(*p!='\0' && *p!='\n'){
231 3d7e9092 2003-10-14 devnull 		while(*p==' ' || *p=='\t')
232 3d7e9092 2003-10-14 devnull 			p++;
233 3d7e9092 2003-10-14 devnull 		if(*p == '\0')
234 3d7e9092 2003-10-14 devnull 			break;
235 3d7e9092 2003-10-14 devnull 		for(q=p; *q!='\0' && *q!='\n' && *q!=' ' && *q!='\t'; q++)
236 3d7e9092 2003-10-14 devnull 			if(*q == '=')
237 3d7e9092 2003-10-14 devnull 				break;
238 3d7e9092 2003-10-14 devnull 		if(*q != '=')
239 3d7e9092 2003-10-14 devnull 			break;	/* malformed attribute */
240 3d7e9092 2003-10-14 devnull 		a = malloc(sizeof(Plumbattr));
241 3d7e9092 2003-10-14 devnull 		if(a == nil)
242 3d7e9092 2003-10-14 devnull 			break;
243 3d7e9092 2003-10-14 devnull 		a->name = malloc(q-p+1);
244 3d7e9092 2003-10-14 devnull 		if(a->name == nil){
245 3d7e9092 2003-10-14 devnull 			free(a);
246 3d7e9092 2003-10-14 devnull 			break;
247 3d7e9092 2003-10-14 devnull 		}
248 3d7e9092 2003-10-14 devnull 		memmove(a->name, p, q-p);
249 3d7e9092 2003-10-14 devnull 		a->name[q-p] = '\0';
250 3d7e9092 2003-10-14 devnull 		/* process quotes in value */
251 3d7e9092 2003-10-14 devnull 		q++;	/* skip '=' */
252 3d7e9092 2003-10-14 devnull 		v = attrbuf;
253 3d7e9092 2003-10-14 devnull 		quoting = 0;
254 3d7e9092 2003-10-14 devnull 		while(*q!='\0' && *q!='\n'){
255 3d7e9092 2003-10-14 devnull 			if(v >= attrbuf+sizeof attrbuf)
256 3d7e9092 2003-10-14 devnull 				break;
257 3d7e9092 2003-10-14 devnull 			c = *q++;
258 3d7e9092 2003-10-14 devnull 			if(quoting){
259 3d7e9092 2003-10-14 devnull 				if(c == '\''){
260 3d7e9092 2003-10-14 devnull 					if(*q == '\'')
261 3d7e9092 2003-10-14 devnull 						q++;
262 3d7e9092 2003-10-14 devnull 					else{
263 3d7e9092 2003-10-14 devnull 						quoting = 0;
264 3d7e9092 2003-10-14 devnull 						continue;
265 3d7e9092 2003-10-14 devnull 					}
266 3d7e9092 2003-10-14 devnull 				}
267 3d7e9092 2003-10-14 devnull 			}else{
268 3d7e9092 2003-10-14 devnull 				if(c==' ' || c=='\t')
269 3d7e9092 2003-10-14 devnull 					break;
270 3d7e9092 2003-10-14 devnull 				if(c == '\''){
271 3d7e9092 2003-10-14 devnull 					quoting = 1;
272 3d7e9092 2003-10-14 devnull 					continue;
273 3d7e9092 2003-10-14 devnull 				}
274 3d7e9092 2003-10-14 devnull 			}
275 3d7e9092 2003-10-14 devnull 			*v++ = c;
276 3d7e9092 2003-10-14 devnull 		}
277 3d7e9092 2003-10-14 devnull 		a->value = malloc(v-attrbuf+1);
278 3d7e9092 2003-10-14 devnull 		if(a->value == nil){
279 3d7e9092 2003-10-14 devnull 			free(a->name);
280 3d7e9092 2003-10-14 devnull 			free(a);
281 3d7e9092 2003-10-14 devnull 			break;
282 3d7e9092 2003-10-14 devnull 		}
283 3d7e9092 2003-10-14 devnull 		memmove(a->value, attrbuf, v-attrbuf);
284 3d7e9092 2003-10-14 devnull 		a->value[v-attrbuf] = '\0';
285 3d7e9092 2003-10-14 devnull 		a->next = nil;
286 3d7e9092 2003-10-14 devnull 		if(prev == nil)
287 3d7e9092 2003-10-14 devnull 			attr = a;
288 3d7e9092 2003-10-14 devnull 		else
289 3d7e9092 2003-10-14 devnull 			prev->next = a;
290 3d7e9092 2003-10-14 devnull 		prev = a;
291 3d7e9092 2003-10-14 devnull 		p = q;
292 3d7e9092 2003-10-14 devnull 	}
293 3d7e9092 2003-10-14 devnull 	return attr;
294 3d7e9092 2003-10-14 devnull }
295 3d7e9092 2003-10-14 devnull 
296 3d7e9092 2003-10-14 devnull Plumbattr*
297 3d7e9092 2003-10-14 devnull plumbaddattr(Plumbattr *attr, Plumbattr *new)
298 3d7e9092 2003-10-14 devnull {
299 3d7e9092 2003-10-14 devnull 	Plumbattr *l;
300 3d7e9092 2003-10-14 devnull 
301 3d7e9092 2003-10-14 devnull 	l = attr;
302 3d7e9092 2003-10-14 devnull 	if(l == nil)
303 3d7e9092 2003-10-14 devnull 		return new;
304 3d7e9092 2003-10-14 devnull 	while(l->next != nil)
305 3d7e9092 2003-10-14 devnull 		l = l->next;
306 3d7e9092 2003-10-14 devnull 	l->next = new;
307 3d7e9092 2003-10-14 devnull 	return attr;
308 3d7e9092 2003-10-14 devnull }
309 3d7e9092 2003-10-14 devnull 
310 3d7e9092 2003-10-14 devnull Plumbattr*
311 3d7e9092 2003-10-14 devnull plumbdelattr(Plumbattr *attr, char *name)
312 3d7e9092 2003-10-14 devnull {
313 3d7e9092 2003-10-14 devnull 	Plumbattr *l, *prev;
314 3d7e9092 2003-10-14 devnull 
315 3d7e9092 2003-10-14 devnull 	prev = nil;
316 3d7e9092 2003-10-14 devnull 	for(l=attr; l!=nil; l=l->next){
317 3d7e9092 2003-10-14 devnull 		if(strcmp(name, l->name) == 0)
318 3d7e9092 2003-10-14 devnull 			break;
319 3d7e9092 2003-10-14 devnull 		prev = l;
320 3d7e9092 2003-10-14 devnull 	}
321 3d7e9092 2003-10-14 devnull 	if(l == nil)
322 3d7e9092 2003-10-14 devnull 		return nil;
323 3d7e9092 2003-10-14 devnull 	if(prev)
324 3d7e9092 2003-10-14 devnull 		prev->next = l->next;
325 3d7e9092 2003-10-14 devnull 	else
326 3d7e9092 2003-10-14 devnull 		attr = l->next;
327 3d7e9092 2003-10-14 devnull 	free(l->name);
328 3d7e9092 2003-10-14 devnull 	free(l->value);
329 3d7e9092 2003-10-14 devnull 	free(l);
330 3d7e9092 2003-10-14 devnull 	return attr;
331 3d7e9092 2003-10-14 devnull }
332 3d7e9092 2003-10-14 devnull 
333 3d7e9092 2003-10-14 devnull Plumbmsg*
334 3d7e9092 2003-10-14 devnull plumbunpackpartial(char *buf, int n, int *morep)
335 3d7e9092 2003-10-14 devnull {
336 3d7e9092 2003-10-14 devnull 	Plumbmsg *m;
337 3d7e9092 2003-10-14 devnull 	int i, bad;
338 3d7e9092 2003-10-14 devnull 	char *ntext, *attr;
339 3d7e9092 2003-10-14 devnull 
340 3d7e9092 2003-10-14 devnull 	m = malloc(sizeof(Plumbmsg));
341 3d7e9092 2003-10-14 devnull 	if(m == nil)
342 3d7e9092 2003-10-14 devnull 		return nil;
343 3d7e9092 2003-10-14 devnull 	memset(m, 0, sizeof(Plumbmsg));
344 3d7e9092 2003-10-14 devnull 	if(morep != nil)
345 3d7e9092 2003-10-14 devnull 		*morep = 0;
346 3d7e9092 2003-10-14 devnull 	bad = 0;
347 3d7e9092 2003-10-14 devnull 	i = plumbline(&m->src, buf, 0, n, &bad);
348 3d7e9092 2003-10-14 devnull 	i = plumbline(&m->dst, buf, i, n, &bad);
349 3d7e9092 2003-10-14 devnull 	i = plumbline(&m->wdir, buf, i, n, &bad);
350 3d7e9092 2003-10-14 devnull 	i = plumbline(&m->type, buf, i, n, &bad);
351 3d7e9092 2003-10-14 devnull 	i = plumbline(&attr, buf, i, n, &bad);
352 3d7e9092 2003-10-14 devnull 	m->attr = plumbunpackattr(attr);
353 3d7e9092 2003-10-14 devnull 	free(attr);
354 3d7e9092 2003-10-14 devnull 	i = plumbline(&ntext, buf, i, n, &bad);
355 3d7e9092 2003-10-14 devnull 	m->ndata = atoi(ntext);
356 3d7e9092 2003-10-14 devnull 	if(m->ndata != n-i){
357 3d7e9092 2003-10-14 devnull 		bad = 1;
358 3d7e9092 2003-10-14 devnull 		if(morep!=nil && m->ndata>n-i)
359 3d7e9092 2003-10-14 devnull 			*morep = m->ndata - (n-i);
360 3d7e9092 2003-10-14 devnull 	}
361 3d7e9092 2003-10-14 devnull 	free(ntext);
362 3d7e9092 2003-10-14 devnull 	if(!bad){
363 3d7e9092 2003-10-14 devnull 		m->data = malloc(n-i+1);	/* +1 for '\0' */
364 3d7e9092 2003-10-14 devnull 		if(m->data == nil)
365 3d7e9092 2003-10-14 devnull 			bad = 1;
366 3d7e9092 2003-10-14 devnull 		else{
367 3d7e9092 2003-10-14 devnull 			memmove(m->data, buf+i, m->ndata);
368 3d7e9092 2003-10-14 devnull 			m->ndata = n-i;
369 3d7e9092 2003-10-14 devnull 			/* null-terminate in case it's text */
370 3d7e9092 2003-10-14 devnull 			m->data[m->ndata] = '\0';
371 3d7e9092 2003-10-14 devnull 		}
372 3d7e9092 2003-10-14 devnull 	}
373 3d7e9092 2003-10-14 devnull 	if(bad){
374 3d7e9092 2003-10-14 devnull 		plumbfree(m);
375 3d7e9092 2003-10-14 devnull 		m = nil;
376 3d7e9092 2003-10-14 devnull 	}
377 3d7e9092 2003-10-14 devnull 	return m;
378 3d7e9092 2003-10-14 devnull }
379 3d7e9092 2003-10-14 devnull 
380 3d7e9092 2003-10-14 devnull Plumbmsg*
381 3d7e9092 2003-10-14 devnull plumbunpack(char *buf, int n)
382 3d7e9092 2003-10-14 devnull {
383 3d7e9092 2003-10-14 devnull 	return plumbunpackpartial(buf, n, nil);
384 3d7e9092 2003-10-14 devnull }
385 3d7e9092 2003-10-14 devnull 
386 3d7e9092 2003-10-14 devnull Plumbmsg*
387 3d7e9092 2003-10-14 devnull plumbrecv(int fd)
388 3d7e9092 2003-10-14 devnull {
389 3d7e9092 2003-10-14 devnull 	char *buf;
390 3d7e9092 2003-10-14 devnull 	Plumbmsg *m;
391 3d7e9092 2003-10-14 devnull 	int n, more;
392 3d7e9092 2003-10-14 devnull 
393 3d7e9092 2003-10-14 devnull 	buf = malloc(8192);
394 3d7e9092 2003-10-14 devnull 	if(buf == nil)
395 3d7e9092 2003-10-14 devnull 		return nil;
396 3d7e9092 2003-10-14 devnull 	n = read(fd, buf, 8192);
397 3d7e9092 2003-10-14 devnull 	m = nil;
398 3d7e9092 2003-10-14 devnull 	if(n > 0){
399 3d7e9092 2003-10-14 devnull 		m = plumbunpackpartial(buf, n, &more);
400 3d7e9092 2003-10-14 devnull 		if(m==nil && more>0){
401 3d7e9092 2003-10-14 devnull 			/* we now know how many more bytes to read for complete message */
402 3d7e9092 2003-10-14 devnull 			buf = realloc(buf, n+more);
403 3d7e9092 2003-10-14 devnull 			if(buf == nil)
404 3d7e9092 2003-10-14 devnull 				return nil;
405 3d7e9092 2003-10-14 devnull 			if(readn(fd, buf+n, more) == more)
406 3d7e9092 2003-10-14 devnull 				m = plumbunpackpartial(buf, n+more, nil);
407 3d7e9092 2003-10-14 devnull 		}
408 3d7e9092 2003-10-14 devnull 	}
409 3d7e9092 2003-10-14 devnull 	free(buf);
410 3d7e9092 2003-10-14 devnull 	return m;
411 3d7e9092 2003-10-14 devnull }