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/*
Unix clm/cocl interface
Ronny Wichers Schreur
*/
# include <stdio.h>
# include <stdlib.h>
# include <stdarg.h>
# include <strings.h>
/*
Clean string
============
*/
typedef struct clean_string {int length; char chars [1]; } *CleanString;
# define Clean(ignore)
# include "ipc.h"
static void
log (char *format, ...)
{
#ifdef DEBUG
va_list ap;
va_start (ap, format);
(void) fputs(" cocl: ", stderr);
(void) vfprintf(stderr, format, ap);
va_end(ap);
#else /* ifndef DEBUG */
#endif
}
static char *
ConvertCleanString (CleanString string)
{
int length;
char *copy;
length = string->length;
copy = malloc (length+1);
strncpy (copy, string->chars, length);
copy [length] = '\0';
return (copy);
} /* ConvertCleanString */
static FILE *commands, *results;
# define COMMAND_BUFFER_SIZE 1024
static char command_buffer[COMMAND_BUFFER_SIZE];
static void
crash (void)
{
int *p;
p = NULL;
log ("crashing\n");
*p = 0;
} /* crash */
static void
hang (void)
{
log ("hanging\n");
for (;;)
;
} /* hang */
int open_pipes (CleanString commands_clean, CleanString results_clean)
{
char *commands_name, *results_name;
commands_name = ConvertCleanString (commands_clean);
results_name = ConvertCleanString (results_clean);
if ((commands = fopen(commands_name, "r")) == NULL)
{
log("commands = %s\n",commands_name);
perror("fopen commands");
return -1;
}
if ((results = fopen(results_name, "w")) == NULL)
{
log("results = %s\n",results_name);
perror("fopen results");
return -1;
}
return 0;
}
int get_command_length (void)
{
log ("reading command\n");
if (fgets (command_buffer, COMMAND_BUFFER_SIZE, commands) == NULL)
return -1;
else
{
log ("command = %s", command_buffer);
return (strlen (command_buffer));
}
}
int get_command (CleanString cleanString)
{
log ("%s\n", command_buffer);
strncpy (cleanString->chars, command_buffer, cleanString->length);
return (0);
}
int send_result (int result)
{
int r;
if (fprintf (results, "%d\n", result) > 0)
r=0;
else
r=-1;
fflush (results);
return r;
}
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