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/*
* Copyright 1993, 1995 Christopher Seiwald.
*
* This file is part of Jam - see jam.c for Copyright information.
*/
/*
* execvms.c - execute a shell script, ala VMS
*
* The approach is this:
*
* If the command is a single line, and shorter than WRTLEN (what we
* believe to be the maximum line length), we just system() it.
*
* If the command is multi-line, or longer than WRTLEN, we write the
* command block to a temp file, splitting long lines (using "-" at
* the end of the line to indicate contiuation), and then source that
* temp file. We use special logic to make sure we don't continue in
* the middle of a quoted string.
*
* 05/04/94 (seiwald) - async multiprocess interface; noop on VMS
* 12/20/96 (seiwald) - rewritten to handle multi-line commands well
* 01/14/96 (seiwald) - don't put -'s between "'s
* 01/20/00 (seiwald) - Upgraded from K&R to ANSI C
*/
# include "jam.h"
# include "lists.h"
# include "execcmd.h"
# ifdef OS_VMS
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <iodef.h>
#include <ssdef.h>
#include <descrip.h>
#include <dvidef.h>
#include <clidef.h>
#define WRTLEN 240
#define MIN( a, b ) ((a) < (b) ? (a) : (b))
/* 1 for the @ and 4 for the .com */
char tempnambuf[ L_tmpnam + 1 + 4 ] = {0};
void
execcmd(
char *string,
void (*func)( void *closure, int status ),
void *closure,
LIST *shell )
{
char *s, *e, *p;
int rstat = EXEC_CMD_OK;
int status;
/* See if string is more than one line */
/* discounting leading/trailing white space */
for( s = string; *s && isspace( *s ); s++ )
;
e = p = strchr( s, '\n' );
while( p && isspace( *p ) )
++p;
/* If multi line or long, write to com file. */
/* Otherwise, exec directly. */
if( p && *p || e - s > WRTLEN )
{
FILE *f;
/* Create temp file invocation "@sys$scratch:tempfile.com" */
if( !*tempnambuf )
{
tempnambuf[0] = '@';
(void)tmpnam( tempnambuf + 1 );
strcat( tempnambuf, ".com" );
}
/* Open tempfile */
if( !( f = fopen( tempnambuf + 1, "w" ) ) )
{
printf( "can't open command file\n" );
(*func)( closure, EXEC_CMD_FAIL );
return;
}
/* For each line of the string */
while( *string )
{
char *s = strchr( string, '\n' );
int len = s ? s + 1 - string : strlen( string );
fputc( '$', f );
/* For each chunk of a line that needs to be split */
while( len > 0 )
{
char *q = string;
char *qe = string + MIN( len, WRTLEN );
char *qq = q;
int quote = 0;
/* Look for matching "'s */
for( ; q < qe; q++ )
if( *q == '"' && ( quote = !quote ) )
qq = q;
/* Back up to opening quote, if in one */
if( quote )
q = qq;
fwrite( string, ( q - string ), 1, f );
len -= ( q - string );
string = q;
if( len )
{
fputc( '-', f );
fputc( '\n', f );
}
}
}
fclose( f );
status = system( tempnambuf ) & 0x07;
unlink( tempnambuf + 1 );
}
else
{
/* Execute single line command */
/* Strip trailing newline before execing */
if( e ) *e = 0;
status = system( s ) & 0x07;
}
/* Fail for error or fatal error */
/* OK on OK, warning, or info exit */
if( status == 2 || status == 4 )
rstat = EXEC_CMD_FAIL;
(*func)( closure, rstat );
}
int
execwait()
{
return 0;
}
# endif /* VMS */
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