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arch/net/charmrun/daemon.h

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/*****************************************************************************
 * $Source: /cvsroot/charm/src/arch/net/charmrun/daemon.h,v $
 * $Author: gzheng $
 * $Date: 2003-10-29 21:46:31 $
 * $Revision: 1.1 $
 *****************************************************************************/

#define DAEMON_IP_PORT 12396

/*This is the structure that is passed to the Daemon when
you want it to start a process.
*/
#define DAEMON_MAXPATHLEN 512
#define DAEMON_MAXENV 256
typedef struct {
        char pgm[DAEMON_MAXPATHLEN]; /*Name of executable to run (no ".exe" needed)*/
        char cwd[DAEMON_MAXPATHLEN];/*Directory in which to start program*/

        char env[DAEMON_MAXENV];/*Environment variables*/

#define DAEMON_MAGIC 0x7AF2893C
        ChMessageInt_t magic;/*Magic number for daemon (a weak security measure)*/
        /*Length (bytes) of the program arguments to follow*/
        ChMessageInt_t argLength;
} taskStruct;

/*This table is used to look up the Windows error code
returned by CreateProcess and convert it into a "status code"
character (returned to conv-host) and an error message
(logged and printed by conv-host).
*/
#ifndef _WIN32
/*UNIX equivalents to Win32 errors*/
#define ERROR_FILE_NOT_FOUND EACCES
#define ERROR_NOT_ENOUGH_MEMORY ENOMEM
#define ERROR_OUTOFMEMORY E2BIG
#define ERROR_ACCESS_DENIED -1000 /*No equivalent*/
#define ERROR_SHARING_VIOLATION -1000
#define ERROR_BAD_EXE_FORMAT ENOEXEC
#endif
const static struct {
                                int errorCode;
                                char statusCode;/*'G'->sucess; all others failure*/
                                char *reason;
} daemon_errtab[]= {
                                {ERROR_FILE_NOT_FOUND,'F',"executable not found."},
                                {-1,'D',"directory not found."},
                                {ERROR_NOT_ENOUGH_MEMORY,'M',"not enough memory."},
                                {ERROR_OUTOFMEMORY,'M',"not enough memory."},
                                {ERROR_ACCESS_DENIED,'A',"access denied."},
                                {ERROR_SHARING_VIOLATION,'S',"sharing violation."},
                                {ERROR_BAD_EXE_FORMAT,'E',"not an executable."},
                                {-1,'N',"could not contact daemon-- is it running?"},
                                {0,0,NULL}
};

/*Convert a windows error code into a status character*/
char daemon_err2status(int err)
{
        int i;
        for (i=0;daemon_errtab[i].reason;i++)
                if (daemon_errtab[i].errorCode==err)
                        return daemon_errtab[i].statusCode;
        return 'U';/*If it's not in the table, it's an unknown error*/
}

/*Convert a status character into a human-readable error code*/
const char *daemon_status2msg(char statusCode)
{
        int i;
        for (i=0;daemon_errtab[i].reason;i++)
                if (daemon_errtab[i].statusCode==statusCode)
                        return daemon_errtab[i].reason;
        return "unknown error.";
}

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