1 d957951b 2005-02-11 devnull #include <u.h>
2 d957951b 2005-02-11 devnull #include <libc.h>
3 d957951b 2005-02-11 devnull #include <bio.h>
4 d957951b 2005-02-11 devnull #include <ndb.h>
5 d957951b 2005-02-11 devnull #include <ndbhf.h>
8 d957951b 2005-02-11 devnull * search for a tuple that has the given 'attr=val' and also 'rattr=x'.
9 d957951b 2005-02-11 devnull * copy 'x' into 'buf' and return the whole tuple.
11 d957951b 2005-02-11 devnull * return 0 if not found.
14 d957951b 2005-02-11 devnull csgetvalue(char *netroot, char *attr, char *val, char *rattr, Ndbtuple **pp)
16 d957951b 2005-02-11 devnull Ndbtuple *t, *first, *last;
17 d957951b 2005-02-11 devnull int n, linefound;
18 d957951b 2005-02-11 devnull char line[1024];
20 d957951b 2005-02-11 devnull int oops = 0;
21 d957951b 2005-02-11 devnull char *rv;
24 d957951b 2005-02-11 devnull *pp = nil;
25 d957951b 2005-02-11 devnull rv = nil;
27 d957951b 2005-02-11 devnull if(netroot)
28 d957951b 2005-02-11 devnull snprint(line, sizeof(line), "%s/cs", netroot);
30 d957951b 2005-02-11 devnull strcpy(line, "/net/cs");
31 d957951b 2005-02-11 devnull fd = open(line, ORDWR);
32 d957951b 2005-02-11 devnull if(fd < 0)
33 d957951b 2005-02-11 devnull return 0;
34 d957951b 2005-02-11 devnull seek(fd, 0, 0);
35 d957951b 2005-02-11 devnull snprint(line, sizeof(line), "!%s=%s %s=*", attr, val, rattr);
36 d957951b 2005-02-11 devnull if(write(fd, line, strlen(line)) < 0){
37 d957951b 2005-02-11 devnull close(fd);
38 d957951b 2005-02-11 devnull return 0;
40 d957951b 2005-02-11 devnull seek(fd, 0, 0);
42 d957951b 2005-02-11 devnull first = last = 0;
43 d957951b 2005-02-11 devnull linefound = 0;
45 d957951b 2005-02-11 devnull n = read(fd, line, sizeof(line)-2);
46 d957951b 2005-02-11 devnull if(n <= 0)
48 d957951b 2005-02-11 devnull line[n] = '\n';
49 d957951b 2005-02-11 devnull line[n+1] = 0;
51 d957951b 2005-02-11 devnull t = _ndbparseline(line);
52 d957951b 2005-02-11 devnull if(t == 0)
53 d957951b 2005-02-11 devnull continue;
54 d957951b 2005-02-11 devnull if(first)
55 d957951b 2005-02-11 devnull last->entry = t;
57 d957951b 2005-02-11 devnull first = t;
58 d957951b 2005-02-11 devnull last = t;
60 d957951b 2005-02-11 devnull while(last->entry)
61 d957951b 2005-02-11 devnull last = last->entry;
63 d957951b 2005-02-11 devnull for(; t; t = t->entry){
64 d957951b 2005-02-11 devnull if(linefound == 0){
65 d957951b 2005-02-11 devnull if(strcmp(rattr, t->attr) == 0){
66 d957951b 2005-02-11 devnull linefound = 1;
67 d957951b 2005-02-11 devnull rv = strdup(t->val);
72 d957951b 2005-02-11 devnull close(fd);
74 d957951b 2005-02-11 devnull if(oops){
75 d957951b 2005-02-11 devnull werrstr("buffer too short");
76 d957951b 2005-02-11 devnull ndbfree(first);
77 d957951b 2005-02-11 devnull return nil;
81 d957951b 2005-02-11 devnull setmalloctag(first, getcallerpc(&netroot));
82 d957951b 2005-02-11 devnull *pp = first;
84 d957951b 2005-02-11 devnull ndbfree(first);
86 d957951b 2005-02-11 devnull return rv;
89 d957951b 2005-02-11 devnull Ndbtuple*
90 d957951b 2005-02-11 devnull csgetval(char *netroot, char *attr, char *val, char *rattr, char *buf)
92 d957951b 2005-02-11 devnull Ndbtuple *t;
95 d957951b 2005-02-11 devnull p = csgetvalue(netroot, attr, val, rattr, &t);
96 d957951b 2005-02-11 devnull if(p == nil){
97 d957951b 2005-02-11 devnull if(buf != nil)
98 d957951b 2005-02-11 devnull *buf = 0;
100 d957951b 2005-02-11 devnull if(buf != nil){
101 d957951b 2005-02-11 devnull strncpy(buf, p, Ndbvlen-1);
102 d957951b 2005-02-11 devnull buf[Ndbvlen-1] = 0;
104 d957951b 2005-02-11 devnull free(p);
106 d957951b 2005-02-11 devnull return t;