1 #include <u.h>
2 #include <libc.h>
3 #include <auth.h>
4 #include <fcall.h>
5 #include <bio.h>
6 #include "tapefs.h"
7 
8 Idmap *
9 getpass(char *file)
10 {
11 	Biobuf *bp;
12 	char *cp;
13 	Idmap *up;
14 	int nid, maxid;
15 	char *line[4];
16 
17 	if ((bp = Bopen(file, OREAD)) == 0)
18 		error("Can't open passwd/group");
19 	up = emalloc(1*sizeof(Idmap));
20 	maxid = 1;
21 	nid = 0;
22 	while ((cp = Brdline(bp, '\n'))) {
23 		int nf;
24 		cp[Blinelen(bp)-1] = 0;
25 		nf = getfields(cp, line, 3, 0, ":\n");
26 		if (nf<3) {
27 			fprint(2, "bad format in %s\n", file);
28 			break;
29 		}
30 		if (nid>=maxid) {
31 			maxid *= 2;
32 			up = (Idmap *)erealloc(up, maxid*sizeof(Idmap));
33 		}
34 		up[nid].id = atoi(line[2]);
35 		up[nid].name = strdup(line[0]);
36 		nid++;
37 	}
38 	Bterm(bp);
39 	up[nid].name = 0;
40 	return up;
41 }
42 
43 char *
44 mapid(Idmap *up, int id)
45 {
46 	char buf[16];
47 
48 	if (up)
49 		while (up->name){
50 			if (up->id==id)
51 				return strdup(up->name);
52 			up++;
53 		}
54 	sprint(buf, "%d", id);
55 	return strdup(buf);
56 }
57 
58 Ram *
59 poppath(Fileinf fi, int new)
60 {
61 	char *suffix;
62 	Ram *dir, *ent;
63 	Fileinf f;
64 
65 	if (*fi.name=='\0')
66 		return 0;
67 	if (suffix=strrchr(fi.name, '/')){
68 		*suffix = 0;
69 		suffix++;
70 		if (*suffix=='\0'){
71 			fi.mode |= DMDIR;
72 			return poppath(fi, 1);
73 		}
74 		f = fi;
75 		f.size = 0;
76 		f.addr = 0;
77 		f.mode = 0555|DMDIR;
78 		dir = poppath(f, 0);
79 		if (dir==0)
80 			dir = ram;
81 	} else {
82 		suffix = fi.name;
83 		dir = ram;
84 		if (strcmp(suffix, ".")==0)
85 			return dir;
86 	}
87 	ent = lookup(dir, suffix);
88 	fi.mode |= 0400;			/* at least user read */
89 	if (ent){
90 		if (((fi.mode&DMDIR)!=0) != ((ent->qid.type&QTDIR)!=0)){
91 			fprint(2, "%s/%s directory botch\n", fi.name, suffix);
92 			exits("");
93 		}
94 		if (new)  {
95 			ent->ndata = fi.size;
96 			ent->addr = fi.addr;
97 			ent->data = fi.data;
98 			ent->perm = fi.mode;
99 			ent->mtime = fi.mdate;
100 			ent->user = mapid(uidmap, fi.uid);
101 			ent->group = mapid(gidmap, fi.gid);
102 		}
103 	} else {
104 		fi.name = suffix;
105 		ent = popfile(dir, fi);
106 	}
107 	return ent;
108 }
109 
110 Ram *
111 popfile(Ram *dir, Fileinf fi)
112 {
113 	Ram *ent = (Ram *)emalloc(sizeof(Ram));
114 	if (*fi.name=='\0')
115 		return 0;
116 	ent->busy = 1;
117 	ent->open = 0;
118 	ent->parent = dir;
119 	ent->next = dir->child;
120 	dir->child = ent;
121 	ent->child = 0;
122 	ent->qid.path = ++path;
123 	ent->qid.vers = 0;
124 	if(fi.mode&DMDIR)
125 		ent->qid.type = QTDIR;
126 	else
127 		ent->qid.type = QTFILE;
128 	ent->perm = fi.mode;
129 	ent->name = estrdup(fi.name);
130 	ent->atime = ent->mtime = fi.mdate;
131 	ent->user = mapid(uidmap, fi.uid);
132 	ent->group = mapid(gidmap, fi.gid);
133 	ent->ndata = fi.size;
134 	ent->data = fi.data;
135 	ent->addr = fi.addr;
136 	ent->replete |= replete;
137 	return ent;
138 }
139 
140 Ram *
141 lookup(Ram *dir, char *name)
142 {
143 	Ram *r;
144 
145 	if (dir==0)
146 		return 0;
147 	for (r=dir->child; r; r=r->next){
148 		if (r->busy==0 || strcmp(r->name, name)!=0)
149 			continue;
150 		return r;
151 	}
152 	return 0;
153 }