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/* $Id: clientactive.c 8921 2010-01-22 23:33:08Z iulius $
**
*/
#include "config.h"
#include "clibrary.h"
#include <errno.h>
#include "inn/innconf.h"
#include "inn/libinn.h"
#include "inn/nntp.h"
#include "inn/paths.h"
static char *CApathname;
static FILE *CAfp;
/*
** Get a copy of the active file for a client host to use, locally or
** remotely.
*/
FILE *
CAopen(FILE *FromServer, FILE *ToServer)
{
char *path;
/* Use a local (or NFS-mounted) copy if available. Make sure we don't
* try to delete it when we close it. */
path = concatpath(innconf->pathdb, INN_PATH_CLIENTACTIVE);
CAfp = fopen(path, "r");
free(path);
if (CAfp != NULL) {
CApathname = NULL;
return CAfp;
}
/* Use the active file from the server */
return CAlistopen(FromServer, ToServer, (char *)NULL);
}
/*
** Internal library routine.
*/
FILE *
CA_listopen(char *pathname, FILE *FromServer, FILE *ToServer,
const char *request)
{
char buff[BUFSIZ];
char expectedanswer[BUFSIZ];
char *p;
int oerrno;
FILE *F;
F = fopen(pathname, "w");
if (F == NULL)
return NULL;
/* Send a LIST command and capture the output. */
if (request == NULL)
fprintf(ToServer, "LIST\r\n");
else
fprintf(ToServer, "LIST %s\r\n", request);
fflush(ToServer);
snprintf(expectedanswer, sizeof(expectedanswer), "%d", NNTP_OK_LIST);
/* Get the server's reply to our command. */
if (fgets(buff, sizeof buff, FromServer) == NULL
|| strncmp(buff, expectedanswer, strlen(expectedanswer)) != 0) {
oerrno = errno;
/* Only call CAclose() if opened through CAopen(). */
if (strcmp(CApathname, pathname) == 0)
CAclose();
errno = oerrno;
return NULL;
}
/* Slurp up the rest of the response. */
while (fgets(buff, sizeof buff, FromServer) != NULL) {
if ((p = strchr(buff, '\r')) != NULL)
*p = '\0';
if ((p = strchr(buff, '\n')) != NULL)
*p = '\0';
if (buff[0] == '.' && buff[1] == '\0') {
if (ferror(F) || fflush(F) == EOF || fclose(F) == EOF)
break;
return fopen(pathname, "r");
}
fprintf(F, "%s\n", buff);
}
/* Ran out of input before finding the terminator; quit. */
oerrno = errno;
fclose(F);
CAclose();
errno = oerrno;
return NULL;
}
/*
** Use the NNTP list command to get a file from a server. Default is
** the active file, otherwise ask for whatever is in the request param.
*/
FILE *
CAlistopen(FILE *FromServer, FILE *ToServer, const char *request)
{
int fd, oerrno;
/* Gotta talk to the server -- see if we can. */
if (FromServer == NULL || ToServer == NULL) {
errno = EBADF;
return NULL;
}
CApathname = concatpath(innconf->pathtmp, INN_PATH_TEMPACTIVE);
fd = mkstemp(CApathname);
if (fd < 0) {
oerrno = errno;
free(CApathname);
CApathname = 0;
errno = oerrno;
return NULL;
}
close(fd);
return CAfp = CA_listopen(CApathname, FromServer, ToServer, request);
}
/*
** Close the file opened by CAopen or CAlistopen.
*/
void
CAclose(void)
{
if (CAfp) {
fclose(CAfp);
CAfp = NULL;
}
if (CApathname != NULL) {
unlink(CApathname);
CApathname = NULL;
}
}
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