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script.c
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/* SCRIPT.C (c) Copyright Roger Bowler, 1999-2012 */
/* (c) Copyright Jan Jaeger, 1999-2012 */
/* (c) Copyright Ivan Warren, 2003-2012 */
/* (c) Copyright "Fish" (David B. Trout), 2002-2012 */
/* (c) Copyright TurboHercules, SAS 2010-2011 */
/* ESA/390 Configuration and Script parser */
/* */
/* Released under "The Q Public License Version 1" */
/* (http://www.hercules-390.org/herclic.html) as modifications to */
/* Hercules. */
/* This module contains all hercules specific config and command */
/* scripting routines. */
/* All hercules specific language contructs, keywords and semantics */
/* are defined in this modeule */
#include "hstdinc.h"
#if !defined(_SCRIPT_C_)
#define _SCRIPT_C_
#endif
#if !defined(_HENGINE_DLL_)
#define _HENGINE_DLL_
#endif
#include "hercules.h"
#include "devtype.h"
#include "opcode.h"
#include "hostinfo.h"
#if !defined(_GEN_ARCH)
#if defined(_ARCHMODE3)
#define _GEN_ARCH _ARCHMODE3
#include "script.c"
#undef _GEN_ARCH
#endif
#if defined(_ARCHMODE2)
#define _GEN_ARCH _ARCHMODE2
#include "script.c"
#undef _GEN_ARCH
#endif
/*-------------------------------------------------------------------*/
/* Script processing control */
/*-------------------------------------------------------------------*/
struct SCRCTL { /* Script control structure */
LIST_ENTRY link; /* Just a link in the chain */
TID scr_tid; /* Script thread id. If zero
then entry is not active. */
int scr_id; /* Script identification no. */
char* scr_name; /* Name of script being run */
char* scr_cmdline; /* Original command-line */
int scr_recursion; /* Current recursion level */
int scr_flags; /* Script processing flags */
#define SCR_CANCEL 0x80 /* Cancel script requested */
#define SCR_ABORT 0x40 /* Script abort requested */
#define SCR_CANCELED 0x20 /* Script has been canceled */
#define SCR_ABORTED 0x10 /* Script has been aborted */
};
typedef struct SCRCTL SCRCTL; /* typedef is easier to use */
static LIST_ENTRY scrlist = {0,0}; /* Script list anchor entry */
static int scrid = 0; /* Script identification no. */
#define SCRTHREADNAME "Script Thread" /* Name of processing thread */
/* Forward declarations: */
static int do_special(char *fname, int *inc_stmtnum, SCRCTL *pCtl, char *p);
static int set_restart(const char * s);
/* End of forward declarations. */
/*-------------------------------------------------------------------*/
/* Subroutine to parse an argument string. The string that is passed */
/* is modified in-place by inserting null characters at the end of */
/* each argument found. The returned array of argument pointers */
/* then points to each argument found in the original string. Any */
/* argument (except the first one) that begins with '#' character */
/* is considered a line comment and causes early termination of */
/* parsing and is not included in the argument count. If the first */
/* argument begins with a '#' character, it is treated as a command */
/* and parsing continues as normal, thus allowing comments to be */
/* processed as commands. Any argument beginning with a double quote */
/* or single apostrophe causes all characters up to the next quote */
/* or apostrophe to be included as part of that argument. The quotes */
/* and/or apostrophes themselves are not considered to be a part of */
/* the argument itself and are replaced with nulls. */
/* p Points to string to be parsed. */
/* maxargc Maximum allowable number of arguments. (Prevents */
/* overflowing the pargv array) */
/* pargv Pointer to buffer for argument pointer array. */
/* pargc Pointer to number of arguments integer result. */
/* Returns number of arguments found. (same value as at *pargc) */
/*-------------------------------------------------------------------*/
DLL_EXPORT int parse_args (char* p, int maxargc, char** pargv, int* pargc)
{
*pargc = 0;
*pargv = NULL;
while (*p && *pargc < maxargc)
{
while (*p && isspace(*p)) p++; if (!*p) break; // find start of arg
if (*p == '#' && *pargc) break; // stop when line comment reached
*pargv = p; ++*pargc; // count new arg
while (*p && !isspace(*p) && *p != '\"' && *p != '\'') p++; if (!*p) break; // find end of arg
if (*p == '\"' || *p == '\'')
{
char delim = *p;
if (p == *pargv) *pargv = p+1;
do {} while (*++p && *p != delim);
if (!*p) break; // find end of quoted string
}
*p++ = 0; // mark end of arg
pargv++; // next arg ptr
}
return *pargc;
}
/*-------------------------------------------------------------------*/
/* Subroutine to read a statement from the configuration file */
/* addargc Contains number of arguments */
/* addargv An array of pointers to each argument */
/* Returns 0 if successful, -1 if end of file */
/*-------------------------------------------------------------------*/
static int read_config (char *fname, FILE *fp, char *buf, unsigned int buflen, int *inc_stmtnum)
{
int c; /* Character work area */
unsigned int stmtlen; /* Statement length */
int lstarted; /* Indicate if non-whitespace*/
/* has been seen yet in line */
#if defined(ENABLE_SYSTEM_SYMBOLS)
char *buf1; /* Pointer to resolved buffer*/
#endif
while (1)
{
/* Increment statement number */
(*inc_stmtnum)++;
/* Read next statement from configuration file */
for (stmtlen = 0, lstarted = 0; ;)
{
if (stmtlen == 0)
memset(buf, 0, buflen); // clear work area
/* Read character from configuration file */
c = fgetc(fp);
/* Check for I/O error */
if (ferror(fp))
{
WRMSG(HHC01432, "S", *inc_stmtnum, fname, "fgetc()", strerror(errno));
return -1;
}
/* Check for end of file */
if (stmtlen == 0 && (c == EOF || c == '\x1A'))
return -1;
/* Check for end of line */
if (c == '\n' || c == EOF || c == '\x1A')
break;
/* Ignore nulls and carriage returns */
if (c == '\0' || c == '\r') continue;
/* Check if it is a white space and no other character yet */
if(!lstarted && isspace(c)) continue;
lstarted=1;
/* Check that statement does not overflow buffer */
if (stmtlen >= buflen - 1)
{
WRMSG(HHC01433, "S", *inc_stmtnum, fname);
return -1;
}
/* Append character to buffer */
buf[stmtlen++] = c;
} /* end for(stmtlen) */
/* Remove trailing blanks and tabs */
while (stmtlen > 0 && (buf[stmtlen-1] == SPACE
|| buf[stmtlen-1] == '\t')) stmtlen--;
buf[stmtlen] = '\0';
#if defined(ENABLE_SYSTEM_SYMBOLS)
#if defined(ENABLE_BUILTIN_SYMBOLS)
set_symbol("CUU","$(CUU)");
set_symbol("CCUU","$(CCUU)");
set_symbol("DEVN","$(DEVN)");
#endif
/* Perform variable substitution */
buf1=resolve_symbol_string(buf);
if(buf1!=NULL)
{
if(strlen(buf1)>=buflen)
{
WRMSG(HHC01433, "S", *inc_stmtnum, fname);
free(buf1);
return -1;
}
strlcpy(buf,buf1,buflen);
free(buf1);
stmtlen = strlen( buf );
}
#endif /* #if defined(ENABLE_SYSTEM_SYMBOLS) */
/* Loud comments should always be logged */
if (stmtlen != 0 && buf[0] == '*')
WRMSG( HHC01603, "I", buf ); // "%s"
/* Ignore null statements and comments */
if (stmtlen == 0 || buf[0] == '*' || buf[0] == '#')
continue;
/* Special handling for 'pause' and other statements */
if (do_special(fname, inc_stmtnum, NULL, buf))
continue;
break;
} /* end while */
return 0;
} /* end function read_config */
/*-------------------------------------------------------------------*/
/* Function to build system configuration */
/*-------------------------------------------------------------------*/
DLL_EXPORT int process_config (const char *cfg_name)
{
#ifdef EXTERNALGUI
char buf[1024]; /* Config statement buffer */
#else /*!EXTERNALGUI*/
char buf[256]; /* Config statement buffer */
#endif /*EXTERNALGUI*/
int addargc; /* Number of additional args */
char *addargv[MAX_ARGS]; /* Additional argument array */
#define MAX_INC_LEVEL 8 /* Maximum nest level */
static int inc_stmtnum[MAX_INC_LEVEL]; /* statement number */
int rc; /* Return code */
int i; /* Array subscript */
int scount; /* Statement counter */
int inc_level; /* Current nesting level */
FILE *inc_fp[MAX_INC_LEVEL]; /* Configuration file pointer*/
BYTE c; /* Work area for sscanf */
#if defined(ENABLE_CONFIG_INCLUDE)
int inc_ignore_errors = 0; /* 1==ignore include errors */
char pathname[MAX_PATH]; /* file path in host format */
#endif
char fname[MAX_PATH]; /* normalized filename */
int errorcount = 0;
#if defined(ENABLE_OBJECT_REXX) || defined(ENABLE_REGINA_REXX)
int shell_flg = FALSE; /* indicate it is has a shell
path specified */
#endif
/* Open the base configuration file */
hostpath(fname, cfg_name, sizeof(fname));
inc_level = 0;
#if defined(_MSVC_)
fopen_s( &inc_fp[inc_level], fname, "r");
#else
inc_fp[inc_level] = fopen (fname, "r");
#endif
if (inc_fp[inc_level] == NULL)
{
WRMSG(HHC01432, "S", 1, fname, "fopen()", strerror(errno));
fflush(stderr);
fflush(stdout);
usleep(100000);
return -1;
}
inc_stmtnum[inc_level] = 0;
/*****************************************************************/
/* Parse configuration file system parameter statements... */
/*****************************************************************/
for (scount = 0; ; scount++)
{
/* Read next record from the configuration file */
while (inc_level >= 0 && read_config (fname, inc_fp[inc_level], buf, sizeof(buf), &inc_stmtnum[inc_level]))
{
fclose (inc_fp[inc_level--]);
}
if (inc_level < 0)
{
return 0;
}
/* Parse the statement just read */
parse_args (buf, MAX_ARGS, addargv, &addargc);
#if defined(ENABLE_OBJECT_REXX) || defined(ENABLE_REGINA_REXX)
// Test for REXX script. If first card starts with "/*" or
// first card has shell path specification "#!" and second card
// "/*", then we will process as a REXX script.
if ( inc_level == 0 && inc_stmtnum[0] < 3 )
{
/* Ignore #! (shell path) card if found */
if ( shell_flg == FALSE &&
inc_stmtnum[0] == 1 &&
!strncmp( addargv[0], "#!", 2 ) )
{
shell_flg = TRUE;
}
/* Check for REXX exec being executed */
if ( !strncmp( addargv[0], "/*", 2 ) &&
( ( shell_flg == FALSE && inc_stmtnum[0] == 1 ) ||
( shell_flg == TRUE && inc_stmtnum[0] == 2 )
)
)
{
char *rcmd[2] = { "exec", NULL };
rcmd[1] = fname;
errorcount = exec_cmd( 2, rcmd, NULL );
goto rexx_done;
}
}
#endif /* defined(ENABLE_OBJECT_REXX) || defined(ENABLE_REGINA_REXX) */
#if defined( ENABLE_CONFIG_INCLUDE )
if (strcasecmp (addargv[0], "ignore") == 0)
{
if (strcasecmp (addargv[1], "include_errors") == 0)
{
WRMSG(HHC01435, "I", fname);
inc_ignore_errors = 1 ;
}
continue ;
}
/* Check for include statement */
if (strcasecmp (addargv[0], "include") == 0)
{
if (++inc_level >= MAX_INC_LEVEL)
{
WRMSG(HHC01436, "S", inc_stmtnum[inc_level-1], fname, MAX_INC_LEVEL);
return -1;
}
hostpath(pathname, addargv[1], sizeof(pathname));
WRMSG(HHC01437, "I", inc_stmtnum[inc_level-1], fname, pathname);
#if defined(_MSVC_)
fopen_s ( &inc_fp[inc_level], pathname, "r");
#else
inc_fp[inc_level] = fopen (pathname, "r");
#endif
if (inc_fp[inc_level] == NULL)
{
inc_level--;
if ( inc_ignore_errors == 1 )
{
WRMSG(HHC01438, "W", fname, addargv[1], strerror(errno));
continue ;
}
else
{
WRMSG(HHC01439, "S", fname, addargv[1], strerror(errno));
return -1;
}
}
inc_stmtnum[inc_level] = 0;
continue;
}
#endif /* #if defined( ENABLE_CONFIG_INCLUDE ) */
if ( ( strlen(addargv[0]) <= 4 &&
sscanf(addargv[0], "%"SCNx32"%c", &rc, &c) == 1 )
||
/* Also, if addargv[0] contains ':' (added by Harold Grovesteen jan2008) */
/* Added because device statements may now contain channel set or LCSS id */
strchr( addargv[0], ':' )
/* ISW */
/* Also, if addargv[0] contains '-', ',' or '.' */
/* Added because device statements may now be a compound device number specification */
||
strchr( addargv[0],'-' )
||
strchr( addargv[0],'.' )
||
strchr( addargv[0],',' )
) /* end if */
{
#define MAX_CMD_LEN 32768
int attargc;
char **attargv;
char attcmdline[MAX_CMD_LEN];
if ( addargv[0] == NULL || addargv[1] == NULL )
{
WRMSG(HHC01448, "S", inc_stmtnum[inc_level], fname);
return -1;
}
/* Build attach command to attach device(s) */
attargc = addargc + 1;
attargv = malloc( attargc * sizeof(char *) );
attargv[0] = "attach";
strlcpy( attcmdline, attargv[0], sizeof(attcmdline) );
for ( i = 1; i < attargc; i++ )
{
attargv[i] = addargv[i - 1];
strlcat( attcmdline, " ", sizeof(attcmdline) );
strlcat( attcmdline, attargv[i], sizeof(attcmdline) );
}
rc = CallHercCmd( attargc, attargv, attcmdline );
free( attargv );
if ( rc == -2 )
{
WRMSG(HHC01443, "S", inc_stmtnum[inc_level], fname, addargv[0], "device number specification");
return -1;
}
continue;
}
/* Check for old-style CPU statement */
if (scount == 0 && addargc == 7 && strlen(addargv[0]) == 6
&& sscanf(addargv[0], "%"SCNx32"%c", &rc, &c) == 1)
{
char *exec_cpuserial[2] = { "cpuserial", NULL };
char *exec_cpumodel[2] = { "cpumodel", NULL };
char *exec_mainsize[2] = { "mainsize", NULL };
char *exec_xpndsize[2] = { "xpndsize", NULL };
char *exec_cnslport[2] = { "cnslport", NULL };
char *exec_numcpu[2] = { "numcpu", NULL };
char *exec_loadparm[2] = { "loadparm", NULL };
exec_cpuserial[1] = addargv[0];
exec_cpumodel[1] = addargv[1];
exec_mainsize[1] = addargv[2];
exec_xpndsize[1] = addargv[3];
exec_cnslport[1] = addargv[4];
exec_numcpu[1] = addargv[5];
exec_loadparm[1] = addargv[6];
if(CallHercCmd (2, exec_cpuserial, NULL) < 0 )
errorcount++;
if(CallHercCmd (2, exec_cpumodel, NULL) < 0 )
errorcount++;
if(CallHercCmd (2, exec_mainsize, NULL) < 0 )
errorcount++;
if(CallHercCmd (2, exec_xpndsize, NULL) < 0 )
errorcount++;
if(CallHercCmd (2, exec_cnslport, NULL) < 0 )
errorcount++;
if(CallHercCmd (2, exec_numcpu, NULL) < 0 )
errorcount++;
if(CallHercCmd (2, exec_loadparm, NULL) < 0 )
errorcount++;
if(errorcount)
WRMSG(HHC01441, "E", inc_stmtnum[inc_level], fname, addargv[0]);
}
else
{
char addcmdline[MAX_CMD_LEN];
int i;
int rc;
strlcpy( addcmdline, addargv[0], sizeof(addcmdline) );
for( i = 1; i < addargc; i++ )
{
strlcat(addcmdline, " ", sizeof(addcmdline));
strlcat(addcmdline, addargv[i], sizeof(addcmdline));
}
rc = CallHercCmd (addargc, addargv, addcmdline);
/* rc < 0 abort, rc == 0 OK, rc > warnings */
if( rc < 0 )
{
errorcount++;
WRMSG(HHC01441, "E", inc_stmtnum[inc_level], fname, addcmdline);
}
} /* end else (not old-style CPU statement) */
} /* end for(scount) (end of configuration file statement loop) */
#if defined(ENABLE_OBJECT_REXX) || defined(ENABLE_REGINA_REXX)
rexx_done:
#if !defined( ENABLE_CONFIG_INCLUDE )
/* close configuration file */
rc = fclose(inc_fp[inc_level]);
#endif
if(!sysblk.msglvl)
sysblk.msglvl = DEFAULT_MLVL;
return errorcount;
#endif // defined(ENABLE_OBJECT_REXX) || defined(ENABLE_REGINA_REXX)
} /* end function process_config */
/*-------------------------------------------------------------------*/
/* Create new SCRCTL entry - lock must *NOT* be held (internal) */
/*-------------------------------------------------------------------*/
static
SCRCTL* NewSCRCTL( TID tid, const char* script_name )
{
SCRCTL* pCtl;
char* scr_name;
ASSERT( script_name );
/* Create a new entry */
if (0
|| !(pCtl = malloc (sizeof( SCRCTL )))
|| !(scr_name = strdup( script_name ))
)
{
// "Out of memory"
WRMSG( HHC00152, "E" );
if (pCtl) free( pCtl );
return NULL;
}
/* Initialize the new entry */
memset( pCtl, 0, sizeof( SCRCTL ));
InitializeListLink( &pCtl->link );
pCtl->scr_tid = tid; /* (may be zero) */
pCtl->scr_name = scr_name;
/* Add the new entry to our list */
obtain_lock( &sysblk.scrlock );
pCtl->scr_id = ++scrid;
if (!scrlist.Flink)
InitializeListHead( &scrlist );
InsertListTail( &scrlist, &pCtl->link );
release_lock( &sysblk.scrlock );
return pCtl;
}
/*-------------------------------------------------------------------*/
/* Update SCRCTL entry - lock must *NOT* be held (internal) */
/*-------------------------------------------------------------------*/
void UpdSCRCTL( SCRCTL* pCtl, const char* script_name )
{
obtain_lock( &sysblk.scrlock );
if (pCtl->scr_name) free( pCtl->scr_name );
pCtl->scr_name = strdup( script_name );
release_lock( &sysblk.scrlock );
}
/*-------------------------------------------------------------------*/
/* Free SCRCTL entry - lock must *NOT* be held (internal) */
/*-------------------------------------------------------------------*/
void FreeSCRCTL( SCRCTL* pCtl )
{
ASSERT( pCtl ); /* (sanity check) */
/* Remove ENTRY from processing list */
obtain_lock( &sysblk.scrlock );
RemoveListEntry( &pCtl->link );
release_lock( &sysblk.scrlock );
/* Free list entry and return */
if (pCtl->scr_name)
free( pCtl->scr_name );
if (pCtl->scr_cmdline)
free( pCtl->scr_cmdline );
free( pCtl );
}
/*-------------------------------------------------------------------*/
/* Find SCRCTL entry - lock must *NOT* be held (internal, external) */
/*-------------------------------------------------------------------*/
void* FindSCRCTL( TID tid )
{
/* PROGRAMMING NOTE: the return type is "void*" so external
callers are able to query whether any scripts are running
without requiring them to known what our internal SCRCTL
struct looks like.
*/
LIST_ENTRY* pLink = NULL;
SCRCTL* pCtl = NULL;
ASSERT( tid ); /* (sanity check) */
obtain_lock( &sysblk.scrlock );
/* Perform first-time initialization if needed */
if (!scrlist.Flink)
InitializeListHead( &scrlist );
/* Search the list to locate the desired entry */
for (pLink = scrlist.Flink; pLink != &scrlist; pLink = pLink->Flink)
{
pCtl = CONTAINING_RECORD( pLink, SCRCTL, link );
if (pCtl->scr_tid && equal_threads( pCtl->scr_tid, tid ))
{
release_lock( &sysblk.scrlock );
return pCtl; /* (found) */
}
}
release_lock( &sysblk.scrlock );
return NULL; /* (not found) */
}
/*-------------------------------------------------------------------*/
/* List script ids - lock must *NOT* be held (internal, external) */
/*-------------------------------------------------------------------*/
void ListScriptsIds()
{
LIST_ENTRY* pLink = NULL;
SCRCTL* pCtl = NULL;
obtain_lock( &sysblk.scrlock );
/* Perform first-time initialization if needed */
if (!scrlist.Flink)
InitializeListHead( &scrlist );
/* Check for empty list */
if (IsListEmpty( &scrlist ))
{
// "No scripts currently running"
WRMSG( HHC02314, "I" );
release_lock( &sysblk.scrlock );
return;
}
/* Display all entries in list */
for (pLink = scrlist.Flink; pLink != &scrlist; pLink = pLink->Flink)
{
pCtl = CONTAINING_RECORD( pLink, SCRCTL, link );
if (!pCtl->scr_tid) continue; /* (inactive) */
// "Script id:%d, tid:"TIDPAT", level:%d, name:%s"
WRMSG( HHC02315, "I", pCtl->scr_id,
pCtl->scr_tid, pCtl->scr_recursion,
pCtl->scr_name ? pCtl->scr_name : "" );
}
release_lock( &sysblk.scrlock );
}
/*-------------------------------------------------------------------*/
/* cscript command - cancel a running script(s) (external) */
/*-------------------------------------------------------------------*/
int cscript_cmd( int argc, char *argv[], char *cmdline )
{
int first = FALSE; /* Cancel first script found */
int all = FALSE; /* Cancel all running scripts */
int scrid = 0; /* Cancel this specific script */
int count = 0; /* Counts #of scripts canceled */
LIST_ENTRY* pLink = NULL; /* (work) */
SCRCTL* pCtl = NULL; /* (work) */
UNREFERENCED( cmdline );
/* Optional argument is the identity of the script to cancel
or "*" (or "all") to cancel all running scripts. The default
if no argument is given is to cancel only the first script.
*/
if (argc > 2)
{
// "Invalid number of arguments"
WRMSG( HHC02446, "E" );
return -1;
}
if (argc < 2)
{
/* Default to first one found */
all = FALSE;
first = TRUE;
}
else /* argc == 2 */
{
/* Cancel all running scripts? */
if (0
|| strcasecmp( argv[1], "*" ) == 0
|| strcasecmp( argv[1], "all" ) == 0
)
{
all = TRUE;
first = FALSE;
}
else /* Specific script */
{
all = FALSE;
first = FALSE;
if ((scrid = atoi( argv[1] )) == 0)
{
// "Invalid argument '%s'%s"
WRMSG( HHC02205, "E", argv[1], ": value not numeric" );
return -1;
}
}
}
obtain_lock( &sysblk.scrlock );
if (!scrlist.Flink || IsListEmpty( &scrlist ))
{
#if 0 // TODO: decide whether old "silent failure" behavior still wanted
return 0;
#else
// "No scripts currently running"
WRMSG( HHC02314, "E" );
release_lock( &sysblk.scrlock );
return -1;
#endif
}
/* Search list for the script(s) to cancel... */
for (pLink = scrlist.Flink; pLink != &scrlist; pLink = pLink->Flink)
{
pCtl = CONTAINING_RECORD( pLink, SCRCTL, link );
if (!pCtl->scr_tid) continue; /* (inactive) */
if (first)
{
pCtl->scr_flags |= SCR_CANCEL;
broadcast_condition( &sysblk.scrcond );
release_lock( &sysblk.scrlock );
return 0;
}
else if (all)
{
pCtl->scr_flags |= SCR_CANCEL;
count++;
}
else if (pCtl->scr_id == scrid)
{
pCtl->scr_flags |= SCR_CANCEL;
count++;
break;
}
}
if (count)
broadcast_condition( &sysblk.scrcond );
release_lock( &sysblk.scrlock );
if (!count)
{
// "Script %s not found"
WRMSG( HHC02316, "E", argv[1] );
return -1;
}
return 0;
}
/*-------------------------------------------------------------------*/
/* Check if script has aborted or been canceled (internal) */
/*-------------------------------------------------------------------*/
static int script_abort( SCRCTL* pCtl )
{
int abort;
if (pCtl->scr_flags & SCR_CANCEL) /* cancel requested? */
{
if (!(pCtl->scr_flags & SCR_CANCELED)) /* no msg given yet? */
{
// "Script %d aborted: '%s'"
WRMSG( HHC02259, "E", pCtl->scr_id, "user cancel request" );
pCtl->scr_flags |= SCR_CANCELED;
}
pCtl->scr_flags |= SCR_ABORT; /* request abort */
}
abort = (pCtl->scr_flags & SCR_ABORT) ? 1 : 0;
return abort;
}
/*-------------------------------------------------------------------*/
/* Process a single script file (internal, external) */
/*-------------------------------------------------------------------*/
int process_script_file( char *script_name, const int isrcfile )
{
SCRCTL* pCtl; /* Script processing control */
char *scrname; /* Resolved script name */
char script_path[MAX_PATH]; /* Full path of script file */
FILE *fp = NULL; /* Script FILE pointer */
char stmt[ MAX_SCRIPT_STMT ]; /* script statement buffer */
int stmtlen = 0; /* Length of current stmt */
int stmtnum = 0; /* Current stmt line number */
TID tid = thread_id(); /* Our thread Id */
char *p; /* (work) */
int rc; /* (work) */
/* Retrieve our control entry */
if (!(pCtl = FindSCRCTL( tid )))
{
/* If not found it's probably the Hercules ".RC" file */
ASSERT( isrcfile );
/* Create a temporary working control entry */
if (!(pCtl = NewSCRCTL( tid, script_name )))
return -1; /* (error message already issued) */
/* Start over again using our temporary control entry. The */
/* screwy second argument is to silence the unused parameter */
/* warning when ASSERT does no assert (the mind boggles) */
rc = process_script_file( script_name, 0 & isrcfile );
FreeSCRCTL( pCtl );
return rc;
}
/* Abort script if already at maximum recursion level */
if (pCtl->scr_recursion >= MAX_SCRIPT_DEPTH)
{
// "Script %d aborted: '%s'"
WRMSG( HHC02259, "E", pCtl->scr_id, "script recursion level exceeded" );
pCtl->scr_flags |= SCR_ABORT;
return -1;
}
#if defined( ENABLE_BUILTIN_SYMBOLS )
if (!(scrname = resolve_symbol_string( script_name )))
#endif
scrname = strdup( script_name );
if (!strcmp(scrname, "-")) /* Standard input? */
{
fp = stdin;
strcpy(script_path, "<stdin>");
}
else
{
/* Open the specified script file */
hostpath( script_path, scrname, sizeof( script_path ));
if (!(fp = fopen( script_path, "r" )))
{
/* We get here with the default script file only when */
/* hercules.rc exists as tested in impl.c. Any error */
/* opening is should be reported to the user. */
int save_errno = errno; /* (save error code for caller) */
if (ENOENT != errno) /* If NOT "File Not found" */
{
// "Error in function '%s': '%s'"
WRMSG( HHC02219, "E", "fopen()", strerror( errno ));
}
else
{
// "Script file '%s' not found"
WRMSG( HHC01405, "E", script_path );
}
errno = save_errno; /* (restore error code for caller) */
free( scrname );
return -1;
}
}
pCtl->scr_recursion++;
/* Read the first line into our statement buffer */
if (!script_abort( pCtl ) && !fgets( stmt, MAX_SCRIPT_STMT, fp ))
{
// "Script %d: begin processing file '%s'"
WRMSG( HHC02260, "I", pCtl->scr_id, script_path );
goto script_end;
}
#if defined(ENABLE_OBJECT_REXX) || defined(ENABLE_REGINA_REXX)
/* Skip past blanks to start of command */
for (p = stmt; isspace( *p ); p++)
; /* (nop; do nothing) */
/* Execute REXX script if line begins with "Slash '/' Asterisk '*'" */
if (!script_abort( pCtl ) && !strncmp( p, "/*", 2 ))
{
char *rcmd[2] = { "exec", NULL };
rcmd[1] = script_path;
fclose( fp ); fp = NULL;
exec_cmd( 2, rcmd, NULL ); /* (synchronous) */
goto script_end;
}
#endif
// "Script %d: begin processing file '%s'"
WRMSG( HHC02260, "I", pCtl->scr_id, script_path );
do
{
stmtnum++;
/* Skip past blanks to start of statement */
for (p = stmt; isspace( *p ); p++)
; /* (nop; do nothing) */
/* Remove trailing whitespace */
for (stmtlen = (int)strlen(p); stmtlen && isspace(p[stmtlen-1]); stmtlen--);
p[stmtlen] = 0;
/* Special handling for 'pause' and other statements */
if (do_special(NULL, NULL, pCtl, p))
continue;
/* Process statement as command */
panel_command( p );
}
while (!script_abort( pCtl ) && fgets( stmt, MAX_SCRIPT_STMT, fp ));
script_end:
/* Issue termination message and close file */
if (fp)
{
if (feof( fp ))
{
// "Script %d: file '%s' processing ended"
WRMSG( HHC02264, "I", pCtl->scr_id, script_path );
}
else /* (canceled, recursion, or i/o error) */
{
if (!(pCtl->scr_flags & SCR_ABORTED)) /* (no msg issued yet?) */
{
if (!script_abort( pCtl )) /* (not abort request?) */
{
// "Error in function '%s': '%s'"
WRMSG( HHC02219,"E", "read()", strerror( errno ));
pCtl->scr_flags |= SCR_ABORT;
}
// "Script %d: file '%s' aborted due to previous conditions"
WRMSG( HHC02265, "I", pCtl->scr_id, script_path );
pCtl->scr_flags |= SCR_ABORTED;
}
}
fclose( fp );
}
pCtl->scr_recursion--;
free( scrname );
return 0;
}
/* end process_script_file */
//#define LOGSCRTHREADBEGEND // TODO: make a decision about this
/*-------------------------------------------------------------------*/
/* Script processing thread - run script in background (internal) */
/*-------------------------------------------------------------------*/
static void *script_thread( void *arg )
{
char* argv[MAX_ARGS]; /* Command arguments array */
int argc; /* Number of cmd arguments */
int i; /* (work) */
TID tid = thread_id();
SCRCTL* pCtl = NULL;
UNREFERENCED(arg);
#ifdef LOGSCRTHREADBEGEND
// "Thread id "TIDPAT", prio %2d, name '%s' started"
WRMSG( HHC00100, "I", (u_long) tid,
get_thread_priority(0), SCRTHREADNAME );
#endif
/* Retrieve our control entry */
pCtl = FindSCRCTL( tid );
ASSERT( pCtl && pCtl->scr_cmdline ); /* (sanity check) */
/* Parse the command line into its individual arguments...
Note: original command line now sprinkled with nulls */
parse_args( pCtl->scr_cmdline, MAX_ARGS, argv, &argc );
ASSERT( argc > 1 ); /* (sanity check) */