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/* fifo.c */
#include "taper.h"
/* functions used by restore/verify */
PUBLIC void fifo_send_file_with_info (FILE *fdfifo, const struct file_info *fi,
const char *file_name, const char *temp_name)
{
fputsz (FIFO_MAGIC, fdfifo);
putc (FIFO_FILE_INFO, fdfifo);
fputsz (file_name, fdfifo);
fputsz (temp_name, fdfifo);
fwrite(fi, sizeof(*fi), 1, fdfifo);
fflush (fdfifo);
}
PUBLIC void fifo_send_end (FILE *fdfifo)
{
fputsz (FIFO_MAGIC, fdfifo);
putc (FIFO_END, fdfifo);
fflush (fdfifo);
}
PUBLIC void fifo_send_error (FILE *fdfifo)
{
fputsz (FIFO_MAGIC, fdfifo);
putc (FIFO_ERROR, fdfifo);
fflush (fdfifo);
}
/* return value:
* 1: fatal error, or end
* 0:
* file_name = compressed_name = NULL -> error
* file_name != NULL, compressed_name != NULL -> everything ok
*/
PUBLIC int fifo_receive_file_with_info (FILE *fdfifo, struct file_info *fi,
char **file_name, char **temp_name)
{
char magic[100];
static char fn[MAX_FNAME], tn[MAX_FNAME];
int c;
if (fgetsz (magic, 100, fdfifo) == NULL)
goto fifo_error;
if (strcmp (magic, FIFO_MAGIC) != 0)
goto fifo_error;
if ((c = getc (fdfifo)) == EOF)
goto fifo_error;
switch (c) {
case FIFO_FILE_INFO:
if (fgetsz (fn, sizeof (fn), fdfifo) == NULL)
goto fifo_error;
if (fgetsz (tn, sizeof (tn), fdfifo) == NULL)
goto fifo_error;
if (fread (fi, sizeof(*fi), 1, fdfifo) != 1)
goto fifo_error;
*file_name = fn;
*temp_name = tn;
return 0;
case FIFO_END:
return 1; /* end */
case FIFO_ERROR:
*file_name = *temp_name = NULL;
return 0; /* continue */
default:
goto fifo_error;
}
fifo_error:
write_log ("ERROR: invalid FIFO data");
return 1; /* end */
}
/* functions used by backup */
PUBLIC void fifo_send_file (FILE *fdfifo, const char *file_name,
const char *compressed_name)
{
fputsz (FIFO_MAGIC, fdfifo);
putc (FIFO_FILE, fdfifo);
fputsz (file_name, fdfifo);
fputsz (compressed_name, fdfifo);
fflush (fdfifo);
}
PUBLIC void fifo_send_error_with_file (FILE *fdfifo, const char *file_name)
{
fputsz (FIFO_MAGIC, fdfifo);
putc (FIFO_ERROR_WITH_FILE, fdfifo);
fputsz (file_name, fdfifo);
fflush (fdfifo);
}
PUBLIC void fifo_send_disk_full (FILE *fdfifo)
{
fputsz (FIFO_MAGIC, fdfifo);
putc (FIFO_DISK_FULL, fdfifo);
fflush (fdfifo);
}
PUBLIC void fifo_send_child_ok (FILE *fdfifo)
{
fputsz (FIFO_MAGIC, fdfifo);
putc (FIFO_CHILD_OK, fdfifo);
fflush (fdfifo);
}
PUBLIC void fifo_send_no_child (FILE *fdfifo)
{
fputsz (FIFO_MAGIC, fdfifo);
putc (FIFO_NO_CHILD, fdfifo);
fflush (fdfifo);
}
/* return value:
* 1: fatal error, or no child
* 0: child ok
*/
PUBLIC int fifo_receive_child_status (FILE *fdfifo)
{
char magic[100];
int c;
if (fgetsz (magic, 100, fdfifo) == NULL)
goto fifo_error;
if (strcmp (magic, FIFO_MAGIC) != 0)
goto fifo_error;
if ((c = getc (fdfifo)) == EOF)
goto fifo_error;
switch (c) {
case FIFO_CHILD_OK:
return 0;
case FIFO_NO_CHILD:
return 1;
default:
goto fifo_error;
}
fifo_error:
write_log ("ERROR: invalid FIFO data");
return 1;
}
char fifo_disk_full_c; /* to make a unique pointer */
/* return value:
* 1: fatal error
* 0:
* file_name = compressed_name = NULL -> EOF
* file_name = fifo_disk_full, compressed_name = NULL -> disk_full
* file_name != NULL, file_name != fifo_disk_full,
* compressed_name = NULL -> error
* file_name != NULL, compressed_name != NULL -> everything ok
*/
PUBLIC int fifo_receive_file (FILE *fdfifo, char **file_name,
char **compressed_name)
{
char magic[100];
static char fn[MAX_FNAME], cn[MAX_FNAME];
int c;
if (fgetsz (magic, 100, fdfifo) == NULL) {
if (ferror (fdfifo))
return 1;
*file_name = *compressed_name = NULL;
return 0;
}
if (strcmp (magic, FIFO_MAGIC) != 0)
goto fifo_error;
if ((c = getc (fdfifo)) == EOF)
goto fifo_error;
switch (c) {
case FIFO_FILE:
if (fgetsz (fn, sizeof (fn), fdfifo) == NULL)
goto fifo_error;
if (fgetsz (cn, sizeof (cn), fdfifo) == NULL)
goto fifo_error;
*file_name = fn;
*compressed_name = cn;
return 0;
case FIFO_ERROR_WITH_FILE:
if (fgetsz (fn, sizeof (fn), fdfifo) == NULL)
goto fifo_error;
*file_name = fn;
*compressed_name = NULL;
return 0;
case FIFO_DISK_FULL:
*file_name = fifo_disk_full;
*compressed_name = NULL;
return 0;
default:
goto fifo_error;
}
fifo_error:
write_log ("ERROR: invalid FIFO data");
return 1;
}
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