ref: a8083462e62459b2ae8a243dc4ba88416eba03b1
dir: /tools/odbc/odbc.c/
#ifdef WINDOWSNT
#include <windows.h>
#endif
#include <lib9.h>
#include <styx.h>
#include "styxserver.h"
/* #include <winsock.h> */
#define DEFCOLSIZE 10000
static int ODebug;
char Eodbcalloc[] = "no free ODBC handles";
char Enoconnect[] = "no ODBC connection";
static char *netport = "6700";
static char *inferno = "inferno";
Styxserver *iserver;
/* ----- */
#include <sql.h>
#include <sqlext.h>
int nclients = 0;
typedef struct Env Env;
struct Env
{
SQLHENV h; /* ODBC environment handle */
};
typedef struct Conn Conn;
struct Conn
{
SQLHDBC h; /* ODBC connection handle */
int connected;
};
typedef struct Coltype Coltype;
struct Coltype
{
char name[255];
ushort type;
SQLUINTEGER size;
ushort digits;
ushort nulls;
};
typedef struct Column Column;
struct Column
{
char *data;
SQLINTEGER len;
};
typedef struct Stmt Stmt;
struct Stmt
{
SQLHSTMT h; /* ODBC statement handle */
ushort ncols; /* number of columns in result */
ulong nrows; /* number of rows affected by update, insert, delete */
Coltype *cols; /* column descriptions */
Column *rec; /* data record */
char *headstr; /* column headings if requested */
};
/* ----- */
enum
{
Qtopdir = 0, /* top level directory */
Qnclients,
Qprotodir,
Qclonus,
Qconvdir,
Qdata,
Qcmd,
Qctl,
Qstatus,
Qformat,
Qsources,
Qerror,
MAXPROTO = 1
};
#define TYPE(x) ((x).path & 0xf)
#define CONV(x) (((x).path >> 4)&0xfff)
#define PROTO(x) (((x).path >> 16)&0xff)
#define QID(p, c, y) (((p)<<16) | ((c)<<4) | (y))
typedef struct Proto Proto;
typedef struct Conv Conv;
typedef struct Output Output;
struct Output {
enum {Fixed, Float} style; /* output style */
uchar fs; /* float: field separator */
uchar rs; /* float: record separator */
};
Output defoutput = {Float, '|', '\n'};
struct Conv
{
int x;
int ref;
int perm;
char *owner;
char* state;
Proto* p;
/*-----*/
Conn c;
Stmt s;
Output out;
int headings;
char errmsg[400]; /* odbc error messages can be big */
};
struct Proto
{
int x;
char *name;
uint nc;
int maxconv;
Conv** conv;
Qid qid;
};
typedef struct Dirtab Dirtab;
struct Dirtab
{
char name[255];
Qid qid;
long length;
long perm;
};
static int np;
static Proto proto[MAXPROTO];
static Conv* protoclone(Proto*, char*);
typedef int Devgen(Fid*, char *, Dirtab*, int, int, Dir*);
struct xClient {
/* ---- */
Env e;
};
#define H(c) ((Env*)(c->u))->h
void
fatal(char *fmt, ...)
{
char buf[1024], *out;
va_list arg;
out = vseprint(buf, buf+sizeof(buf), "Fatal error: ", 0);
va_start(arg, fmt);
out = vseprint(out, buf+sizeof(buf), fmt, arg);
va_end(arg);
write(2, buf, out-buf);
exit(1);
}
#define ASSERT(A,B) xassert((int)A,B)
void
xassert(int true, char *reason)
{
if(!true)
fatal("assertion failed: %s\n", reason);
}
void *
xmalloc(int bytes)
{
char *m = malloc(bytes);
if(m)
memset(m, 0, bytes);
// print("xmalloc: %lux (%d)\n", m, bytes);
return m;
}
void
xfree(void *p, char *from)
{
// print("xfree: %lux [%s]\n", p, from);
free(p);
}
char *
odbcerror(Conv *cv, int lasterr)
{
char sqlstate[6];
long native;
char *mp;
short msglen;
if(cv == 0)
return "";
if(lasterr)
return cv->errmsg;
if(cv->c.connected)
SQLGetDiagRec(SQL_HANDLE_STMT, cv->s.h, 1, sqlstate, &native, cv->errmsg, sizeof(cv->errmsg), &msglen);
else
SQLGetDiagRec(SQL_HANDLE_DBC, cv->c.h, 1, sqlstate, &native, cv->errmsg, sizeof(cv->errmsg), &msglen);
cv->errmsg[msglen]=0;
/* fprint(2, "c: sqlstate: %s, msg %s\n", sqlstate, cv->errmsg); */
if((mp=strrchr(cv->errmsg, ']')) != 0)
return mp+1;
return cv->errmsg;
}
char*
odbcsources(Client *c)
{
int ss, i;
char server[SQL_MAX_DSN_LENGTH+1];
char source[1024];
char buff[1024+SQL_MAX_DSN_LENGTH+1];
short serverlen, sourcelen;
char *all = nil, *p;
for (i=0;; i++) {
ss = SQLDataSources(H(c), (i==0 ? SQL_FETCH_FIRST : SQL_FETCH_NEXT),
server, sizeof(server), &serverlen,
source, sizeof(source), &sourcelen);
if (ss != SQL_SUCCESS)
break;
snprint(buff, sizeof(buff), "%s:%s\n", server, source);
if (i == 0)
all = strdup(buff);
else {
p = all;
all = malloc(strlen(all)+strlen(buff)+1);
strcpy(all, p);
strcat(all, buff);
free(p);
}
}
return all;
}
int
sqlerr(Conv *c, int sqlstatus, char *errp, char *func, char *sqlcall)
{
char *e;
errp[0] = 0;
e = "failed";
if (sqlstatus == SQL_ERROR || sqlstatus == SQL_SUCCESS_WITH_INFO)
strecpy(errp, errp+ERRMAX, odbcerror(c, 0));
if (sqlstatus == SQL_SUCCESS_WITH_INFO)
e = "info";
if (sqlstatus != SQL_SUCCESS)
fprint(2, "%s: %s %s - %s\n", func, sqlcall, e, errp);
if (sqlstatus != SQL_SUCCESS && sqlstatus != SQL_SUCCESS_WITH_INFO)
return 1;
return 0;
}
char*
odbcnewclient(Client *c)
{
int ss;
/* ---- */
c->u = styxmalloc(sizeof(Env));
ss = SQLAllocHandle(SQL_HANDLE_ENV, SQL_NULL_HANDLE, &H(c));
if (ss != SQL_SUCCESS && ss != SQL_SUCCESS_WITH_INFO) {
fprint(2, "newclient: SQLAllocHandle failed\n");
return "SQLAllocHandle failed";
}
ss = SQLSetEnvAttr(H(c), SQL_ATTR_ODBC_VERSION, (char*)SQL_OV_ODBC2, 0);
if (ss != SQL_SUCCESS && ss != SQL_SUCCESS_WITH_INFO) {
fprint(2, "newclient: SQLSetEnvAttr failed\n");
return "SQLSetEnvAttr failed";
}
nclients++;
return nil;
}
char*
odbcfreeclient(Client *c)
{
int ss;
ss = SQLFreeHandle(SQL_HANDLE_ENV, H(c));
if (ss != SQL_SUCCESS && ss != SQL_SUCCESS_WITH_INFO)
fprint(2, "freeclient: SQLFreeHandle failed\n");
styxfree(c->u);
nclients--;
return nil;
}
int
parsefields(char *lp, char **fields, int n, char *sep)
{
int i;
for(i=0; lp && *lp && i<n; i++){
while(*lp && strchr(sep, *lp) != 0)
*lp++=0;
if(*lp == 0)
break;
fields[i]=lp;
while(*lp && strchr(sep, *lp) == 0)
lp++;
}
return i;
}
void
odbcdisconnect(Conv *c)
{
int ss;
if(c->c.connected){
ss = SQLFreeHandle(SQL_HANDLE_STMT, c->s.h);
if (ss != SQL_SUCCESS && ss != SQL_SUCCESS_WITH_INFO)
fprint(2, "odbcdisconnect: SQLFreeHandle failed\n");
ss = SQLDisconnect(c->c.h);
if (ss != SQL_SUCCESS && ss != SQL_SUCCESS_WITH_INFO)
fprint(2, "odbcdisconnect: SQLDisconnect failed\n");
c->c.connected = 0;
}
}
int
odbcconnect(Conv *c, char *server, char *user, char *auth, char *ename)
{
int ss;
odbcdisconnect(c);
ss = SQLConnect(c->c.h, server, SQL_NTS, user, strlen(user), auth, strlen(auth));
if (sqlerr(c, ss, ename, "odbcconnect", "SQLConnect"))
return -1;
c->c.connected = 1;
ss = SQLAllocHandle(SQL_HANDLE_STMT, c->c.h, &c->s.h);
if (sqlerr(c, ss, ename, "odbcconnect", "SQLAllocHandle"))
return -1;
return 0;
}
int
odbcnewconv(Client *c, Conv *cv)
{
int ss;
ss = SQLAllocHandle(SQL_HANDLE_DBC, H(c), &cv->c.h);
if (ss != SQL_SUCCESS && ss != SQL_SUCCESS_WITH_INFO) {
fprint(2, "odbcnewconv: SQLAllocHandle failed\n");
return -1;
}
return 0;
}
void
odbcfreeconv(Conv *c)
{
int ss;
odbcdisconnect(c);
ss = SQLFreeHandle(SQL_HANDLE_DBC, c->c.h);
if (ss != SQL_SUCCESS && ss != SQL_SUCCESS_WITH_INFO)
fprint(2, "odbcfreeconv: SQLFreeHandle failed\n");
}
/* Free up all memory used in the last query */
void
freestat(Stmt *s)
{
int i;
if (s->ncols == 0)
return;
for(i=0; i<s->ncols; i++){
Column *d = &s->rec[i];
xfree(d->data, "freestat - data");
}
xfree(s->cols, "freestat - cols");
s->cols = 0;
xfree(s->rec, "freestat - rec");
s->rec = 0;
xfree(s->headstr, "freestat - headstr");
s->headstr = 0;
s->ncols = 0;
}
/* build an array describing the columns */
int
mkcols(Conv *c, char *ename)
{
Stmt *s;
int rv, i, err, hsize;
ushort ignore;
char *p;
s = &c->s;
s->ncols = 0;
rv = SQLNumResultCols(s->h, &s->ncols);
if (sqlerr(c, rv, ename, "mkcols", "SQLNumResultCols"))
return -1;
s->cols = xmalloc(s->ncols*sizeof(Coltype));
err = 0;
hsize = 0;
for(i=0; i<s->ncols; i++){
Coltype *t = &s->cols[i];
rv = SQLDescribeCol(s->h, i+1, t->name, sizeof(t->name), &ignore, &t->type, &t->size, &t->digits, &t->nulls);
if (sqlerr(c, rv, ename, "mkcols", "SQLDescribeCol"))
err++;
if(t->size == 0 || t->size > MSGMAX) /* odbc should return 0 if size not available, not -1 */
t->size = DEFCOLSIZE;
hsize += strlen(t->name) + 1;
}
if (c->headings) {
hsize += 2;
s->headstr = xmalloc(hsize);
p = s->headstr;
for(i=0; i<s->ncols; i++) {
Coltype *t = &s->cols[i];
p += sprint(p, "%s%c", t->name, c->out.fs);
}
p[-1] = c->out.rs;
} else
s->headstr = 0;
return (err ? -1 : 0);
}
/* build a record to hold `fetched' results */
int
mkrec(Conv *c, char *ename)
{
Stmt *s;
int rv, i;
s = &c->s;
s->rec = xmalloc(s->ncols*sizeof(Column));
for(i=0; i<s->ncols; i++){
Coltype *t = &s->cols[i];
Column *d = &s->rec[i];
if (ODebug)
print("Column %d size=%ud type=%hd\n", i, t->size, t->type);
d->data = xmalloc(t->size+1); /* expects to zero terminate */
rv = SQLBindCol(s->h, i+1, SQL_C_CHAR, d->data, t->size+1, &d->len);
if (sqlerr(c, rv, ename, "mkrec", "SQLBindCol"))
return -1;
}
return 0;
}
int
rowcount(Conv *c, char *ename)
{
Stmt *s;
int rv;
s = &c->s;
s->nrows = 0;
rv = SQLRowCount(s->h, &s->nrows);
if (sqlerr(c, rv, ename, "rowcount", "SQLRowCount"))
return -1;
return 0;
}
int
odbcfetch(Conv *c, char *ename)
{
Stmt *s = &c->s;
int rv;
rv = SQLFetch(s->h);
if(rv == SQL_NO_DATA) {
freestat(s);
return 0;
}
if (sqlerr(c, rv, ename, "odbcfetch", "SQLFetch")) {
freestat(s);
return -1;
}
return 1;
}
int
odbcresults(Conv *c, char *ename)
{
if(mkcols(c, ename))
return -1;
if(mkrec(c, ename))
return -1;
if(rowcount(c, ename))
return -1;
return 0;
}
void
struncate(char *s, long *len)
{
long i;
for (i=0; i<*len; i++)
if (s[i] == 0) {
*len = i;
return;
}
}
void
fix_delim(char *p, int len, char delim)
{
int i;
for (i=0; i<len; i++)
if (p[i] == delim)
p[i] = '\\';
}
long
odbcdataread(Conv *c, void *a, long n, ulong offset, char *ename)
{
Stmt *s = &c->s;
int i, r;
long left;
char *p, *lastp;
if(c->c.connected == 0){
strcpy(ename, Enoconnect);
return -1;
}
if (s->cols == 0 || s->rec == 0)
return 0;
p = a;
left = n;
if (c->headings) {
r = strlen(s->headstr);
if (r && offset < r) {
memcpy(p, s->headstr+offset, r-offset);
p += r-offset;
left -= r-offset;
return n-left;
}
}
if((r=odbcfetch(c, ename)) < 0)
return -1;
if(r == 0)
return 0;
for(i=0; i<s->ncols; i++){
Coltype *t = &s->cols[i];
Column *d = &s->rec[i];
if (ODebug)
fprint(2, "Col %d Returned data len=%d\n", i, d->len);
if(d->len <= 0) /* SQL_NULL_DATA or strange error! */
d->len = 0;
if (d->len > t->size+1)
d->len = t->size+1;
if(left <= d->len+1) /* whole fields */
break;
struncate(d->data, &d->len); /* assume string data and stop on an embedded null */
memcpy(p, d->data, d->len);
lastp = p;
left -= d->len;
p += d->len;
fix_delim(lastp, d->len, '\n');
switch(c->out.style){
case Float:
fix_delim(lastp, d->len, c->out.fs);
*p++ = (i==s->ncols-1)? c->out.rs: c->out.fs;
left--;
break;
case Fixed:
r = t->size - d->len;
if(r < 0)
r = 0;
if(left < r)
r = left;
memset(p, ' ', r);
left -= r;
p += r;
break;
}
}
if (left < 0)
fprint(2, "*** left<0 n=%d left=%d\n", n, left);
return n-left;
}
/*
* Returns a description of the format of a fixed width output
* record. `start' is the offset of the first character in the field.
* `end' is one greater than the offset of the last character of the field.
* `name' is the column name (which may contain spaces).
* `start' and `end' are terminated with a space, `name' with a newline.
* return 1 record containing one line for each field in the output:
* start1 end1 name1\n
* start2 end2 name2\n
* ....
*/
long
odbcfmtread(Conv *c, void *a, long n, ulong offset, char *ename)
{
Stmt *s = &c->s;
int i, len;
long left, off;
char *p;
char buf[100];
if(offset > 0)
return 0;
p = a;
left = n;
off = 0;
for(i=0; i<s->ncols; i++){
Coltype *t = &s->cols[i];
len = snprint(buf, sizeof(buf), "%ld %ld %s\n", off, off+t->size, t->name);
off += t->size;
if(left < len)
break;
memcpy(p, buf, len);
left -= len;
p += len;
}
return n-left;
}
int
odbctables(Conv *c, char *ename)
{
int rv;
if(c->c.connected == 0){
strcpy(ename, Enoconnect);
return -1;
}
rv = SQLCloseCursor(c->s.h);
rv = SQLTables(c->s.h, 0, 0, 0, 0, 0, 0, 0, 0);
if (sqlerr(c, rv, ename, "odbctables", "SQLTables"))
return -1;
if(odbcresults(c, ename))
return -1;
return 0;
}
int
odbccolumns(Conv *c, char *table, char *ename)
{
int rv;
if(c->c.connected == 0){
strcpy(ename, Enoconnect);
return -1;
}
rv = SQLCloseCursor(c->s.h);
rv = SQLColumns(c->s.h, 0, 0, 0, 0, table, strlen(table), 0, 0);
if (sqlerr(c, rv, ename, "odbccolumns", "SQLColumns"))
return -1;
if(odbcresults(c, ename))
return -1;
return 0;
}
int
odbcexec(Conv *c, char *cmd, int cmdlen, char *ename)
{
int rv;
if(c->c.connected == 0){
strcpy(ename, Enoconnect);
return -1;
}
SQLCloseCursor(c->s.h);
rv = SQLExecDirect(c->s.h, cmd, cmdlen);
if (sqlerr(c, rv, ename, "odbcexec", "SQLExecDirect"))
return -1;
if(odbcresults(c, ename))
return -1;
return 0;
}
int
odbctrans(Conv *c, char *cmd, char *ename)
{
int rv;
if(strcmp(cmd, "auto") == 0){
rv = SQLSetConnectAttr(c->c.h, SQL_ATTR_AUTOCOMMIT, (char*)SQL_AUTOCOMMIT_ON, 0);
} else if(strcmp(cmd, "begin") == 0){
rv = SQLSetConnectAttr(c->c.h, SQL_ATTR_AUTOCOMMIT, (char*)SQL_AUTOCOMMIT_OFF, 0);
} else if(strcmp(cmd, "commit") == 0){
rv = SQLEndTran(SQL_HANDLE_DBC, c->c.h, SQL_COMMIT);
} else if(strcmp(cmd, "rollback") == 0){
rv = SQLEndTran(SQL_HANDLE_DBC, c->c.h, SQL_ROLLBACK);
} else {
strcpy(ename, Ebadarg);
return -1;
}
if (sqlerr(c, rv, ename, "odbctrans", "SQLSetConnectAttr/SQLEndTran"))
return -1;
return 0;
}
int
readstr(ulong off, char *buf, ulong n, char *str)
{
int size;
size = strlen(str);
if(off >= size)
return 0;
if(off+n > size)
n = size-off;
memmove(buf, str+off, n);
return n;
}
static void
newproto(char *name, int maxconv)
{
int l;
Proto *p;
if(np >= MAXPROTO) {
print("no %s: increase MAXPROTO", name);
return;
}
p = &proto[np];
p->name = strdup(name);
p->qid.path = QID(np, 0, Qprotodir);
p->qid.type = QTDIR;
p->x = np++;
p->maxconv = maxconv;
l = sizeof(Conv*)*(p->maxconv+1);
p->conv = xmalloc(l);
if(p->conv == 0)
fatal("no memory");
memset(p->conv, 0, l);
}
char*
openmode(int *o)
{
if(*o >= (OTRUNC|OCEXEC|ORCLOSE|OEXEC)){
return Ebadarg;
}
*o &= ~(OTRUNC|OCEXEC|ORCLOSE);
if(*o > OEXEC){
return Ebadarg;
}
if(*o == OEXEC)
*o = OREAD;
return nil;
}
static Conv*
protoclone(Proto *p, char *user)
{
Conv *c, **pp, **ep;
uvlong nr;
char buf[16];
c = 0;
ep = &p->conv[p->maxconv];
for(pp = p->conv; pp < ep; pp++) {
c = *pp;
if(c == 0) {
c = xmalloc(sizeof(Conv));
if(c == 0)
return 0;
c->ref = 1;
c->p = p;
c->x = pp - p->conv;
p->nc++;
*pp = c;
break;
}
if(c->ref == 0) {
c->ref++;
break;
}
}
if(pp >= ep)
return 0;
c->owner = strdup(user);
c->perm = 0660;
c->state = "Open";
c->out = defoutput;
c->headings = 0;
c->errmsg[0] = 0;
nr = QID(0, c->x, Qconvdir);
snprint(buf, sizeof(buf), "%d", c->x);
styxadddir(iserver, Qprotodir, nr, buf, 0555, c->owner);
styxaddfile(iserver, nr, QID(0, c->x, Qcmd), "cmd", c->perm, c->owner);
styxaddfile(iserver, nr, QID(0, c->x, Qctl), "ctl", c->perm, c->owner);
styxaddfile(iserver, nr, QID(0, c->x, Qdata), "data", c->perm, c->owner);
styxaddfile(iserver, nr, QID(0, c->x, Qerror), "error", c->perm, c->owner);
styxaddfile(iserver, nr, QID(0, c->x, Qformat), "format", c->perm, c->owner);
styxaddfile(iserver, nr, QID(0, c->x, Qsources), "sources", c->perm, c->owner);
styxaddfile(iserver, nr, QID(0, c->x, Qstatus), "status", 0444, c->owner);
return c;
}
char*
dbopen(Qid *qid, int omode)
{
Proto *p;
int perm;
Conv *cv;
char *user;
Qid q;
Client *c;
q = *qid;
c = styxclient(iserver);
perm = 0;
omode &= 3;
switch(omode) {
case OREAD:
perm = 4;
break;
case OWRITE:
perm = 2;
break;
case ORDWR:
perm = 6;
break;
}
switch(TYPE(q)) {
default:
break;
case Qtopdir:
case Qprotodir:
case Qconvdir:
case Qstatus:
case Qformat:
case Qsources:
case Qerror:
if(omode != OREAD){
return Eperm;
}
break;
case Qclonus:
p = &proto[PROTO(q)];
cv = protoclone(p, c->uname);
if(cv == 0){
return Enodev;
}
qid->path = QID(p->x, cv->x, Qctl);
qid->type = 0;
qid->vers = 0;
if(odbcnewconv(c, cv) != 0){
return Eodbcalloc;
}
break;
case Qdata:
case Qcmd:
case Qctl:
p = &proto[PROTO(q)];
cv = p->conv[CONV(q)];
user = c->uname;
if((perm & (cv->perm>>6)) != perm) {
if(strcmp(user, cv->owner) != 0 ||
(perm & cv->perm) != perm) {
return Eperm;
}
}
cv->ref++;
if(cv->ref == 1) {
cv->state = "Open";
cv->owner = strdup(user);
cv->perm = 0660;
if(odbcnewconv(c, cv) != 0){
return Eodbcalloc;
}
}
break;
}
return openmode(&omode);
}
char*
dbclose(Qid qid, int mode)
{
Conv *cc;
USED(mode);
switch(TYPE(qid)) {
case Qctl:
case Qcmd:
case Qdata:
cc = proto[PROTO(qid)].conv[CONV(qid)];
if(--cc->ref != 0)
break;
cc->owner = inferno;
cc->perm = 0666;
cc->state = "Closed";
odbcfreeconv(cc);
styxrmfile(iserver, QID(0, cc->x, Qconvdir));
break;
}
return nil;
}
static char ebuf[ERRMAX];
char*
dbread(Qid qid, char *ba, ulong *n, vlong offset)
{
uchar *a = ba;
Conv *c;
Proto *x;
char buf[128], *p, *s;
long r;
ulong m;
m = *n;
ebuf[0] = 0;
p = a;
switch(TYPE(qid)) {
default:
return Eperm;
case Qnclients:
snprint(buf, sizeof(buf), "%d\n", nclients);
*n = readstr(offset, p, m, buf);
return nil;
case Qprotodir:
case Qtopdir:
case Qconvdir:
return "bad read of directory";
case Qctl:
snprint(buf, sizeof(buf), "%ld", CONV(qid));
*n = readstr(offset, p, m, buf);
return nil;
case Qstatus:
x = &proto[PROTO(qid)];
c = x->conv[CONV(qid)];
snprint(buf, sizeof(buf), "%s/%d %ld %s %s\n",
c->p->name, c->x, c->ref, c->state, "");
*n = readstr(offset, p, m, buf);
return nil;
case Qdata:
c = proto[PROTO(qid)].conv[CONV(qid)];
*n = odbcdataread(c, a, m, offset, ebuf);
if(ebuf[0] != 0)
return ebuf;
return nil;
case Qformat:
c = proto[PROTO(qid)].conv[CONV(qid)];
*n = odbcfmtread(c, a, m, offset, ebuf);
if(ebuf[0] != 0)
return ebuf;
return nil;
case Qerror:
c = proto[PROTO(qid)].conv[CONV(qid)];
*n = readstr(offset, p, m, odbcerror(c, 1));
return nil;
case Qsources:
c = proto[PROTO(qid)].conv[CONV(qid)];
s = odbcsources(styxclient(iserver));
r = readstr(offset, p, m, s);
free(s);
*n = r;
return nil;
}
return nil;
}
char*
dbwrite(Qid qid, char *ba, ulong *n, vlong offset)
{
uchar *a = ba;
int nf;
Conv *c;
Proto *x;
char *fields[10], buf[512], safebuf[512];
ulong m;
m = *n;
ebuf[0] = 0;
switch(TYPE(qid)) {
default:
return Eperm;
case Qctl:
x = &proto[PROTO(qid)];
c = x->conv[CONV(qid)];
//
if(m > sizeof(buf)-1)
m = sizeof(buf)-1;
memmove(buf, a, m);
buf[m] = '\0';
if (ODebug)
fprint(2, "write Qctl: <%s>\n", buf);
fields[0] = 0;
nf = parsefields(buf, fields, sizeof(fields)/sizeof(*fields), " \n\t");
if (nf == 0) {
return Ebadarg;
}
if(strcmp(fields[0], "connect") == 0){ /* connect database [user!auth] */
char *afields[2];
char *user = "";
char *auth = "";
switch(nf){
default:
return Ebadarg;
case 2:
break;
case 3:
nf = parsefields(fields[2], afields, 2, "!");
switch(nf){
case 2:
user = afields[0];
auth = afields[1];
break;
case 1:
if(fields[2][0] == 0)
auth = afields[0];
else
user = afields[0];
break;
default:
break;
}
break;
}
if(odbcconnect(c, fields[1], user, auth, ebuf) < 0)
return ebuf;
c->state = "Connected";
} else if(strcmp(fields[0], "disconnect") == 0){
odbcdisconnect(c);
c->state = "Disconnected";
} else if(strcmp(fields[0], "fixed") == 0){
c->out = defoutput;
c->out.style = Fixed;
} else if(strcmp(fields[0], "float") == 0){
c->out = defoutput;
c->out.style = Float;
if(nf > 1)
c->out.fs = fields[1][0];
if(nf > 2)
c->out.rs = fields[2][0];
} else if(strcmp(fields[0], "headings") == 0){
c->headings = 1;
} else if(strcmp(fields[0], "noheadings") == 0){
c->headings = 0;
} else if(strcmp(fields[0], "trans") == 0){ /* begin, auto, commit, rollback */
if(nf < 2){
return Ebadarg;
}
if(odbctrans(c, fields[1], ebuf) < 0)
return ebuf;
} else {
return Ebadcmd;
}
*n = m;
return nil;
case Qcmd:
x = &proto[PROTO(qid)];
c = x->conv[CONV(qid)];
if(m > sizeof(buf)-1)
m = sizeof(buf)-1;
memmove(buf, a, m);
buf[m] = '\0';
if (ODebug)
fprint(2, "write Qcmd: <%s>\n", buf);
memmove(safebuf, a, m);
safebuf[m] = '\0';
fields[0] = 0;
nf = parsefields(buf, fields, 3, " \n\t");
if (nf == 0) {
return Ebadarg;
}
if(strcmp(fields[0], "tables") == 0){
if(odbctables(c, ebuf))
return ebuf;
}else if(strcmp(fields[0], "columns") == 0){
if(nf < 2){
return Ebadarg;
}
if(odbccolumns(c, &safebuf[strlen(fields[0])+1], ebuf)) /* allow for spaces in table name */
return ebuf;
} else
if (odbcexec(c, a, m, ebuf))
return ebuf;
*n = m;
return nil;
case Qdata:
return Eperm;
}
return nil;
}
void
badusage(void)
{
fprint(2, "Usage: odbc [-d] [-p port]\n");
exit(1);
}
Styxops ops = {
odbcnewclient, /* newclient */
odbcfreeclient, /* freeclient */
nil, /* attach */
nil, /* walk */
dbopen, /* open */
nil, /* create */
dbread, /* read */
dbwrite, /* write */
dbclose, /* close */
nil, /* remove */
nil, /* stat */
nil, /* wstat */
};
void
main(int argc, char *argv[])
{
Styxserver s;
ARGBEGIN {
default:
badusage();
case 'd': /* Debug */
ODebug = 1;
styxdebug();
break;
case 'p': /* Debug */
netport = EARGF(badusage());
break;
} ARGEND
iserver = &s;
styxinit(&s, &ops, netport, -1, 1);
styxaddfile(&s, Qroot, Qnclients, "nclients", 0444, inferno);
styxadddir(&s, Qroot, Qprotodir, "db", 0555, inferno);
styxaddfile(&s, Qprotodir, Qclonus, "new", 0666, inferno);
newproto("db", 100);
for (;;) {
styxwait(&s);
styxprocess(&s);
}
styxend(&s);
}