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Date:: Thu Apr 8 19:31:21 2004 UTC
Message:: Cache last uid, gid to make translation faster.
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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 
  5 478ee963 2003-11-23 devnull #include <sys/types.h>
  6 fd04aace 2003-11-23 devnull #include <sys/stat.h>
  7 fd04aace 2003-11-23 devnull #include <dirent.h>
  8 fd04aace 2003-11-23 devnull #include <pwd.h>
  9 fd04aace 2003-11-23 devnull #include <grp.h>
 10 fd04aace 2003-11-23 devnull 
 11 64bcfff3 2003-11-25 devnull #if defined(__FreeBSD__)
 12 64bcfff3 2003-11-25 devnull #include <sys/disklabel.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 64bcfff3 2003-11-25 devnull #if !defined(__linux__) && !defined(__sun__)
 47 64bcfff3 2003-11-25 devnull #define _HAVESTGEN
 48 64bcfff3 2003-11-25 devnull #endif
 49 64bcfff3 2003-11-25 devnull 
 50 6f6553df 2004-04-08 devnull /*
 51 6f6553df 2004-04-08 devnull  * Caching the last group and passwd looked up is
 52 6f6553df 2004-04-08 devnull  * a significant win (stupidly enough) on most systems.
 53 6f6553df 2004-04-08 devnull  * It's not safe for threaded programs, but neither is using
 54 6f6553df 2004-04-08 devnull  * getpwnam in the first place, so I'm not too worried.
 55 6f6553df 2004-04-08 devnull  */
 56 fd04aace 2003-11-23 devnull int
 57 fd04aace 2003-11-23 devnull _p9dir(struct stat *st, char *name, Dir *d, char **str, char *estr)
 58 fd04aace 2003-11-23 devnull {
 59 fd04aace 2003-11-23 devnull 	char *s;
 60 fd04aace 2003-11-23 devnull 	char tmp[20];
 61 6f6553df 2004-04-08 devnull 	static struct group *g;
 62 6f6553df 2004-04-08 devnull 	static struct passwd *p;
 63 6f6553df 2004-04-08 devnull 	static int gid, uid;
 64 fd04aace 2003-11-23 devnull 	int sz;
 65 fd04aace 2003-11-23 devnull 
 66 fd04aace 2003-11-23 devnull 	sz = 0;
 67 fd04aace 2003-11-23 devnull 	if(d)
 68 fd04aace 2003-11-23 devnull 		memset(d, 0, sizeof *d);
 69 fd04aace 2003-11-23 devnull 
 70 fd04aace 2003-11-23 devnull 	/* name */
 71 fd04aace 2003-11-23 devnull 	s = strrchr(name, '/');
 72 fd04aace 2003-11-23 devnull 	if(s)
 73 fd04aace 2003-11-23 devnull 		s++;
 74 fd04aace 2003-11-23 devnull 	if(!s || !*s)
 75 fd04aace 2003-11-23 devnull 		s = name;
 76 fd04aace 2003-11-23 devnull 	if(*s == '/')
 77 fd04aace 2003-11-23 devnull 		s++;
 78 fd04aace 2003-11-23 devnull 	if(*s == 0)
 79 fd04aace 2003-11-23 devnull 		s = "/";
 80 fd04aace 2003-11-23 devnull 	if(d){
 81 fd04aace 2003-11-23 devnull 		if(*str + strlen(s)+1 > estr)
 82 fd04aace 2003-11-23 devnull 			d->name = "oops";
 83 fd04aace 2003-11-23 devnull 		else{
 84 fd04aace 2003-11-23 devnull 			strcpy(*str, s);
 85 fd04aace 2003-11-23 devnull 			d->name = *str;
 86 fd04aace 2003-11-23 devnull 			*str += strlen(*str)+1;
 87 fd04aace 2003-11-23 devnull 		}
 88 fd04aace 2003-11-23 devnull 	}
 89 fd04aace 2003-11-23 devnull 	sz += strlen(s)+1;
 90 fd04aace 2003-11-23 devnull 
 91 fd04aace 2003-11-23 devnull 	/* user */
 92 6f6553df 2004-04-08 devnull 	if(p && st->st_uid == uid && p->pw_uid == uid)
 93 6f6553df 2004-04-08 devnull 		;
 94 6f6553df 2004-04-08 devnull 	else{
 95 6f6553df 2004-04-08 devnull 		p = getpwuid(st->st_uid);
 96 6f6553df 2004-04-08 devnull 		uid = st->st_uid;
 97 6f6553df 2004-04-08 devnull 	}
 98 fd04aace 2003-11-23 devnull 	if(p == nil){
 99 fd04aace 2003-11-23 devnull 		snprint(tmp, sizeof tmp, "%d", (int)st->st_uid);
100 fd04aace 2003-11-23 devnull 		s = tmp;
101 fd04aace 2003-11-23 devnull 	}else
102 fd04aace 2003-11-23 devnull 		s = p->pw_name;
103 fd04aace 2003-11-23 devnull 	sz += strlen(s)+1;
104 fd04aace 2003-11-23 devnull 	if(d){
105 fd04aace 2003-11-23 devnull 		if(*str+strlen(s)+1 > estr)
106 fd04aace 2003-11-23 devnull 			d->uid = "oops";	
107 fd04aace 2003-11-23 devnull 		else{
108 fd04aace 2003-11-23 devnull 			strcpy(*str, s);
109 fd04aace 2003-11-23 devnull 			d->uid = *str;
110 fd04aace 2003-11-23 devnull 			*str += strlen(*str)+1;
111 fd04aace 2003-11-23 devnull 		}
112 fd04aace 2003-11-23 devnull 	}
113 fd04aace 2003-11-23 devnull 
114 fd04aace 2003-11-23 devnull 	/* group */
115 6f6553df 2004-04-08 devnull 	if(g && st->st_gid == gid && g->gr_gid == gid)
116 6f6553df 2004-04-08 devnull 		;
117 6f6553df 2004-04-08 devnull 	else{
118 6f6553df 2004-04-08 devnull 		g = getgrgid(st->st_gid);
119 6f6553df 2004-04-08 devnull 		gid = st->st_gid;
120 6f6553df 2004-04-08 devnull 	}
121 fd04aace 2003-11-23 devnull 	if(g == nil){
122 fd04aace 2003-11-23 devnull 		snprint(tmp, sizeof tmp, "%d", (int)st->st_gid);
123 fd04aace 2003-11-23 devnull 		s = tmp;
124 fd04aace 2003-11-23 devnull 	}else
125 fd04aace 2003-11-23 devnull 		s = g->gr_name;
126 fd04aace 2003-11-23 devnull 	sz += strlen(s)+1;
127 fd04aace 2003-11-23 devnull 	if(d){
128 fd04aace 2003-11-23 devnull 		if(*str + strlen(s)+1 > estr)
129 fd04aace 2003-11-23 devnull 			d->gid = "oops";	
130 fd04aace 2003-11-23 devnull 		else{
131 fd04aace 2003-11-23 devnull 			strcpy(*str, s);
132 fd04aace 2003-11-23 devnull 			d->gid = *str;
133 fd04aace 2003-11-23 devnull 			*str += strlen(*str)+1;
134 fd04aace 2003-11-23 devnull 		}
135 fd04aace 2003-11-23 devnull 	}
136 fd04aace 2003-11-23 devnull 
137 fd04aace 2003-11-23 devnull 	if(d){
138 fd04aace 2003-11-23 devnull 		d->type = 'M';
139 fd04aace 2003-11-23 devnull 
140 fd04aace 2003-11-23 devnull 		d->muid = "";
141 fd04aace 2003-11-23 devnull 		d->qid.path = ((uvlong)st->st_dev<<32) | st->st_ino;
142 1c253ceb 2003-11-23 devnull #ifdef _HAVESTGEN
143 fd04aace 2003-11-23 devnull 		d->qid.vers = st->st_gen;
144 1c253ceb 2003-11-23 devnull #endif
145 fd04aace 2003-11-23 devnull 		d->mode = st->st_mode&0777;
146 fd04aace 2003-11-23 devnull 		d->atime = st->st_atime;
147 fd04aace 2003-11-23 devnull 		d->mtime = st->st_mtime;
148 fd04aace 2003-11-23 devnull 		d->length = st->st_size;
149 fd04aace 2003-11-23 devnull 
150 fd04aace 2003-11-23 devnull 		if(S_ISDIR(st->st_mode)){
151 fd04aace 2003-11-23 devnull 			d->length = 0;
152 fd04aace 2003-11-23 devnull 			d->mode |= DMDIR;
153 fd04aace 2003-11-23 devnull 			d->qid.type = QTDIR;
154 fd04aace 2003-11-23 devnull 		}
155 fd04aace 2003-11-23 devnull 
156 fd04aace 2003-11-23 devnull 		/* fetch real size for disks */
157 1c253ceb 2003-11-23 devnull #ifdef _HAVEDISKLABEL
158 669250d1 2003-12-03 devnull 		if(isdisk(st)){
159 fd04aace 2003-11-23 devnull 			int fd, n;
160 fd04aace 2003-11-23 devnull 			struct disklabel lab;
161 fd04aace 2003-11-23 devnull 
162 fd04aace 2003-11-23 devnull 			if((fd = open(name, O_RDONLY)) < 0)
163 fd04aace 2003-11-23 devnull 				goto nosize;
164 fd04aace 2003-11-23 devnull 			if(ioctl(fd, DIOCGDINFO, &lab) < 0)
165 fd04aace 2003-11-23 devnull 				goto nosize;
166 fd04aace 2003-11-23 devnull 			n = minor(st->st_rdev)&7;
167 fd04aace 2003-11-23 devnull 			if(n >= lab.d_npartitions)
168 fd04aace 2003-11-23 devnull 				goto nosize;
169 fd04aace 2003-11-23 devnull 
170 fd04aace 2003-11-23 devnull 			d->length = (vlong)(lab.d_partitions[n].p_size) * lab.d_secsize;
171 fd04aace 2003-11-23 devnull 
172 fd04aace 2003-11-23 devnull 		nosize:
173 fd04aace 2003-11-23 devnull 			if(fd >= 0)
174 fd04aace 2003-11-23 devnull 				close(fd);
175 fd04aace 2003-11-23 devnull 		}
176 1c253ceb 2003-11-23 devnull #endif
177 fd04aace 2003-11-23 devnull 	}
178 fd04aace 2003-11-23 devnull 
179 fd04aace 2003-11-23 devnull 	return sz;
180 fd04aace 2003-11-23 devnull }
181 fd04aace 2003-11-23 devnull