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Date:: Wed Aug 10 17:16:38 2005 UTC
Message:: Fix overflow in old Linux file size.
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  1 478ee963 2003-11-23 devnull #include <u.h>
  2 478ee963 2003-11-23 devnull #define NOPLAN9DEFINES
  3 478ee963 2003-11-23 devnull #include <libc.h>
  4 478ee963 2003-11-23 devnull #include <sys/types.h>
  5 fd04aace 2003-11-23 devnull #include <sys/stat.h>
  6 fd04aace 2003-11-23 devnull #include <dirent.h>
  7 fd04aace 2003-11-23 devnull #include <pwd.h>
  8 fd04aace 2003-11-23 devnull #include <grp.h>
  9 fd04aace 2003-11-23 devnull 
 10 fe8c925e 2005-07-21 devnull #if defined(__FreeBSD__) || defined(__OpenBSD__)
 11 64bcfff3 2003-11-25 devnull #include <sys/disklabel.h>
 12 fe8c925e 2005-07-21 devnull #include <sys/ioctl.h>
 13 669250d1 2003-12-03 devnull static int diskdev[] = {
 14 669250d1 2003-12-03 devnull 	151,	/* aacd */
 15 669250d1 2003-12-03 devnull 	116,	/* ad */
 16 669250d1 2003-12-03 devnull 	157,	/* ar */
 17 669250d1 2003-12-03 devnull 	118,	/* afd */
 18 669250d1 2003-12-03 devnull 	133,	/* amrd */
 19 669250d1 2003-12-03 devnull 	13,	/* da */
 20 669250d1 2003-12-03 devnull 	102,	/* fla */
 21 669250d1 2003-12-03 devnull 	109,	/* idad */
 22 669250d1 2003-12-03 devnull 	95,	/* md */
 23 669250d1 2003-12-03 devnull 	131,	/* mlxd */
 24 669250d1 2003-12-03 devnull 	168,	/* pst */
 25 669250d1 2003-12-03 devnull 	147,	/* twed */
 26 669250d1 2003-12-03 devnull 	43,	/* vn */
 27 669250d1 2003-12-03 devnull 	3,	/* wd */
 28 669250d1 2003-12-03 devnull 	87,	/* wfd */
 29 669250d1 2003-12-03 devnull };
 30 669250d1 2003-12-03 devnull static int
 31 669250d1 2003-12-03 devnull isdisk(struct stat *st)
 32 669250d1 2003-12-03 devnull {
 33 669250d1 2003-12-03 devnull 	int i, dev;
 34 669250d1 2003-12-03 devnull 
 35 669250d1 2003-12-03 devnull 	if(!S_ISCHR(st->st_mode))
 36 669250d1 2003-12-03 devnull 		return 0;
 37 669250d1 2003-12-03 devnull 	dev = major(st->st_rdev);
 38 669250d1 2003-12-03 devnull 	for(i=0; i<nelem(diskdev); i++)
 39 669250d1 2003-12-03 devnull 		if(diskdev[i] == dev)
 40 669250d1 2003-12-03 devnull 			return 1;
 41 669250d1 2003-12-03 devnull 	return 0;
 42 669250d1 2003-12-03 devnull }
 43 64bcfff3 2003-11-25 devnull #define _HAVEDISKLABEL
 44 64bcfff3 2003-11-25 devnull #endif
 45 64bcfff3 2003-11-25 devnull 
 46 7317e77d 2004-04-25 devnull #if defined(__linux__)
 47 7317e77d 2004-04-25 devnull #include <linux/hdreg.h>
 48 7317e77d 2004-04-25 devnull #include <linux/fs.h>
 49 7317e77d 2004-04-25 devnull #include <sys/ioctl.h>
 50 a3e9d893 2005-08-10 devnull #undef major
 51 a3e9d893 2005-08-10 devnull #define major(dev) ((int)(((dev) >> 8) & 0xff))
 52 7317e77d 2004-04-25 devnull static vlong
 53 7317e77d 2004-04-25 devnull disksize(int fd, int dev)
 54 7317e77d 2004-04-25 devnull {
 55 7317e77d 2004-04-25 devnull 	u64int u64;
 56 7317e77d 2004-04-25 devnull 	long l;
 57 7317e77d 2004-04-25 devnull 	struct hd_geometry geo;
 58 7317e77d 2004-04-25 devnull 
 59 ceecb313 2004-06-09 devnull 	memset(&geo, 0, sizeof geo);
 60 ceecb313 2004-06-09 devnull 	l = 0;
 61 ceecb313 2004-06-09 devnull 	u64 = 0;
 62 76e6aca8 2004-05-15 devnull #ifdef BLKGETSIZE64
 63 7317e77d 2004-04-25 devnull 	if(ioctl(fd, BLKGETSIZE64, &u64) >= 0)
 64 7317e77d 2004-04-25 devnull 		return u64;
 65 76e6aca8 2004-05-15 devnull #endif
 66 7317e77d 2004-04-25 devnull 	if(ioctl(fd, BLKGETSIZE, &l) >= 0)
 67 a3e9d893 2005-08-10 devnull 		return (vlong)l*512;
 68 7317e77d 2004-04-25 devnull 	if(ioctl(fd, HDIO_GETGEO, &geo) >= 0)
 69 7317e77d 2004-04-25 devnull 		return (vlong)geo.heads*geo.sectors*geo.cylinders*512;
 70 7317e77d 2004-04-25 devnull 	return 0;
 71 7317e77d 2004-04-25 devnull }
 72 7317e77d 2004-04-25 devnull #define _HAVEDISKSIZE
 73 7317e77d 2004-04-25 devnull #endif
 74 7317e77d 2004-04-25 devnull 
 75 64bcfff3 2003-11-25 devnull #if !defined(__linux__) && !defined(__sun__)
 76 64bcfff3 2003-11-25 devnull #define _HAVESTGEN
 77 64bcfff3 2003-11-25 devnull #endif
 78 64bcfff3 2003-11-25 devnull 
 79 6f6553df 2004-04-08 devnull /*
 80 6f6553df 2004-04-08 devnull  * Caching the last group and passwd looked up is
 81 6f6553df 2004-04-08 devnull  * a significant win (stupidly enough) on most systems.
 82 6f6553df 2004-04-08 devnull  * It's not safe for threaded programs, but neither is using
 83 6f6553df 2004-04-08 devnull  * getpwnam in the first place, so I'm not too worried.
 84 6f6553df 2004-04-08 devnull  */
 85 fd04aace 2003-11-23 devnull int
 86 0a229052 2005-02-08 devnull _p9dir(struct stat *lst, struct stat *st, char *name, Dir *d, char **str, char *estr)
 87 fd04aace 2003-11-23 devnull {
 88 fd04aace 2003-11-23 devnull 	char *s;
 89 fd04aace 2003-11-23 devnull 	char tmp[20];
 90 6f6553df 2004-04-08 devnull 	static struct group *g;
 91 6f6553df 2004-04-08 devnull 	static struct passwd *p;
 92 6f6553df 2004-04-08 devnull 	static int gid, uid;
 93 7317e77d 2004-04-25 devnull 	int sz, fd;
 94 fd04aace 2003-11-23 devnull 
 95 631fe87f 2004-05-14 devnull 	fd = -1;
 96 631fe87f 2004-05-14 devnull 	USED(fd);
 97 fd04aace 2003-11-23 devnull 	sz = 0;
 98 fd04aace 2003-11-23 devnull 	if(d)
 99 fd04aace 2003-11-23 devnull 		memset(d, 0, sizeof *d);
100 fd04aace 2003-11-23 devnull 
101 fd04aace 2003-11-23 devnull 	/* name */
102 fd04aace 2003-11-23 devnull 	s = strrchr(name, '/');
103 fd04aace 2003-11-23 devnull 	if(s)
104 fd04aace 2003-11-23 devnull 		s++;
105 fd04aace 2003-11-23 devnull 	if(!s || !*s)
106 fd04aace 2003-11-23 devnull 		s = name;
107 fd04aace 2003-11-23 devnull 	if(*s == '/')
108 fd04aace 2003-11-23 devnull 		s++;
109 fd04aace 2003-11-23 devnull 	if(*s == 0)
110 fd04aace 2003-11-23 devnull 		s = "/";
111 fd04aace 2003-11-23 devnull 	if(d){
112 fd04aace 2003-11-23 devnull 		if(*str + strlen(s)+1 > estr)
113 fd04aace 2003-11-23 devnull 			d->name = "oops";
114 fd04aace 2003-11-23 devnull 		else{
115 fd04aace 2003-11-23 devnull 			strcpy(*str, s);
116 fd04aace 2003-11-23 devnull 			d->name = *str;
117 fd04aace 2003-11-23 devnull 			*str += strlen(*str)+1;
118 fd04aace 2003-11-23 devnull 		}
119 fd04aace 2003-11-23 devnull 	}
120 fd04aace 2003-11-23 devnull 	sz += strlen(s)+1;
121 fd04aace 2003-11-23 devnull 
122 fd04aace 2003-11-23 devnull 	/* user */
123 6f6553df 2004-04-08 devnull 	if(p && st->st_uid == uid && p->pw_uid == uid)
124 6f6553df 2004-04-08 devnull 		;
125 6f6553df 2004-04-08 devnull 	else{
126 6f6553df 2004-04-08 devnull 		p = getpwuid(st->st_uid);
127 6f6553df 2004-04-08 devnull 		uid = st->st_uid;
128 6f6553df 2004-04-08 devnull 	}
129 fd04aace 2003-11-23 devnull 	if(p == nil){
130 fd04aace 2003-11-23 devnull 		snprint(tmp, sizeof tmp, "%d", (int)st->st_uid);
131 fd04aace 2003-11-23 devnull 		s = tmp;
132 fd04aace 2003-11-23 devnull 	}else
133 fd04aace 2003-11-23 devnull 		s = p->pw_name;
134 fd04aace 2003-11-23 devnull 	sz += strlen(s)+1;
135 fd04aace 2003-11-23 devnull 	if(d){
136 fd04aace 2003-11-23 devnull 		if(*str+strlen(s)+1 > estr)
137 fd04aace 2003-11-23 devnull 			d->uid = "oops";	
138 fd04aace 2003-11-23 devnull 		else{
139 fd04aace 2003-11-23 devnull 			strcpy(*str, s);
140 fd04aace 2003-11-23 devnull 			d->uid = *str;
141 fd04aace 2003-11-23 devnull 			*str += strlen(*str)+1;
142 fd04aace 2003-11-23 devnull 		}
143 fd04aace 2003-11-23 devnull 	}
144 fd04aace 2003-11-23 devnull 
145 fd04aace 2003-11-23 devnull 	/* group */
146 6f6553df 2004-04-08 devnull 	if(g && st->st_gid == gid && g->gr_gid == gid)
147 6f6553df 2004-04-08 devnull 		;
148 6f6553df 2004-04-08 devnull 	else{
149 6f6553df 2004-04-08 devnull 		g = getgrgid(st->st_gid);
150 6f6553df 2004-04-08 devnull 		gid = st->st_gid;
151 6f6553df 2004-04-08 devnull 	}
152 fd04aace 2003-11-23 devnull 	if(g == nil){
153 fd04aace 2003-11-23 devnull 		snprint(tmp, sizeof tmp, "%d", (int)st->st_gid);
154 fd04aace 2003-11-23 devnull 		s = tmp;
155 fd04aace 2003-11-23 devnull 	}else
156 fd04aace 2003-11-23 devnull 		s = g->gr_name;
157 fd04aace 2003-11-23 devnull 	sz += strlen(s)+1;
158 fd04aace 2003-11-23 devnull 	if(d){
159 fd04aace 2003-11-23 devnull 		if(*str + strlen(s)+1 > estr)
160 fd04aace 2003-11-23 devnull 			d->gid = "oops";	
161 fd04aace 2003-11-23 devnull 		else{
162 fd04aace 2003-11-23 devnull 			strcpy(*str, s);
163 fd04aace 2003-11-23 devnull 			d->gid = *str;
164 fd04aace 2003-11-23 devnull 			*str += strlen(*str)+1;
165 fd04aace 2003-11-23 devnull 		}
166 fd04aace 2003-11-23 devnull 	}
167 fd04aace 2003-11-23 devnull 
168 fd04aace 2003-11-23 devnull 	if(d){
169 fd04aace 2003-11-23 devnull 		d->type = 'M';
170 fd04aace 2003-11-23 devnull 
171 fd04aace 2003-11-23 devnull 		d->muid = "";
172 fd04aace 2003-11-23 devnull 		d->qid.path = ((uvlong)st->st_dev<<32) | st->st_ino;
173 1c253ceb 2003-11-23 devnull #ifdef _HAVESTGEN
174 fd04aace 2003-11-23 devnull 		d->qid.vers = st->st_gen;
175 1c253ceb 2003-11-23 devnull #endif
176 fd04aace 2003-11-23 devnull 		d->mode = st->st_mode&0777;
177 fd04aace 2003-11-23 devnull 		d->atime = st->st_atime;
178 fd04aace 2003-11-23 devnull 		d->mtime = st->st_mtime;
179 fd04aace 2003-11-23 devnull 		d->length = st->st_size;
180 fd04aace 2003-11-23 devnull 
181 fd04aace 2003-11-23 devnull 		if(S_ISDIR(st->st_mode)){
182 fd04aace 2003-11-23 devnull 			d->length = 0;
183 fd04aace 2003-11-23 devnull 			d->mode |= DMDIR;
184 fd04aace 2003-11-23 devnull 			d->qid.type = QTDIR;
185 fd04aace 2003-11-23 devnull 		}
186 98660df2 2005-02-21 devnull 		if(S_ISLNK(lst->st_mode))	/* yes, lst not st */
187 2acd6fa6 2005-02-08 devnull 			d->mode |= DMSYMLINK;
188 2acd6fa6 2005-02-08 devnull 		if(S_ISFIFO(st->st_mode))
189 2acd6fa6 2005-02-08 devnull 			d->mode |= DMNAMEDPIPE;
190 2acd6fa6 2005-02-08 devnull 		if(S_ISSOCK(st->st_mode))
191 2acd6fa6 2005-02-08 devnull 			d->mode |= DMSOCKET;
192 2acd6fa6 2005-02-08 devnull 		if(S_ISBLK(st->st_mode)){
193 2acd6fa6 2005-02-08 devnull 			d->mode |= DMDEVICE;
194 2acd6fa6 2005-02-08 devnull 			d->qid.path = ('b'<<16)|st->st_rdev;
195 2acd6fa6 2005-02-08 devnull 		}
196 2acd6fa6 2005-02-08 devnull 		if(S_ISCHR(st->st_mode)){
197 2acd6fa6 2005-02-08 devnull 			d->mode |= DMDEVICE;
198 2acd6fa6 2005-02-08 devnull 			d->qid.path = ('c'<<16)|st->st_rdev;
199 2acd6fa6 2005-02-08 devnull 		}
200 fd04aace 2003-11-23 devnull 		/* fetch real size for disks */
201 7317e77d 2004-04-25 devnull #ifdef _HAVEDISKSIZE
202 3d72637f 2004-04-26 devnull 		if(S_ISBLK(st->st_mode) && (fd = open(name, O_RDONLY)) >= 0){
203 7317e77d 2004-04-25 devnull 			d->length = disksize(fd, major(st->st_dev));
204 7317e77d 2004-04-25 devnull 			close(fd);
205 7317e77d 2004-04-25 devnull 		}
206 7317e77d 2004-04-25 devnull #endif
207 1c253ceb 2003-11-23 devnull #ifdef _HAVEDISKLABEL
208 669250d1 2003-12-03 devnull 		if(isdisk(st)){
209 fd04aace 2003-11-23 devnull 			int fd, n;
210 fd04aace 2003-11-23 devnull 			struct disklabel lab;
211 fd04aace 2003-11-23 devnull 
212 fd04aace 2003-11-23 devnull 			if((fd = open(name, O_RDONLY)) < 0)
213 fd04aace 2003-11-23 devnull 				goto nosize;
214 fd04aace 2003-11-23 devnull 			if(ioctl(fd, DIOCGDINFO, &lab) < 0)
215 fd04aace 2003-11-23 devnull 				goto nosize;
216 fd04aace 2003-11-23 devnull 			n = minor(st->st_rdev)&7;
217 fd04aace 2003-11-23 devnull 			if(n >= lab.d_npartitions)
218 fd04aace 2003-11-23 devnull 				goto nosize;
219 fd04aace 2003-11-23 devnull 
220 fd04aace 2003-11-23 devnull 			d->length = (vlong)(lab.d_partitions[n].p_size) * lab.d_secsize;
221 fd04aace 2003-11-23 devnull 
222 fd04aace 2003-11-23 devnull 		nosize:
223 fd04aace 2003-11-23 devnull 			if(fd >= 0)
224 fd04aace 2003-11-23 devnull 				close(fd);
225 fd04aace 2003-11-23 devnull 		}
226 1c253ceb 2003-11-23 devnull #endif
227 fd04aace 2003-11-23 devnull 	}
228 fd04aace 2003-11-23 devnull 
229 fd04aace 2003-11-23 devnull 	return sz;
230 fd04aace 2003-11-23 devnull }
231 fd04aace 2003-11-23 devnull