/* * 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 */
# | Change | User | Description | Committed | |
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#6 | 9896 | Perforce staff |
Maximum command line length now determined by execmax() function, which still just returns the compiled-in MAXLINE. p4transfer.py: Transferred from production |
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#5 | 2493 | rmg |
Rewrite the past: update all jam's source with comments to reflect changes since about 2.3, very early 2001. Whitespace only change. === computer:1666: Change 37660 by seiwald@play-seiwald on 2002/11/06 22:41:35 Note: I regenerated jamgram.c on my linux 7.3 system prior to the submit, since patch was so unhappy trying to lay down the changes from Christopher's change. Presumably this is just due to different yacc/bison/whatever particulars on the system where Christopher made the changes originally. - rmg |
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#4 | 1351 | rmg |
This change is integration history only. (Accept -ay'ed integrating: Change 216 by peter_glasscock@peter_glasscock on 1999/07/27 03:25:01 Integrate recent changes to public source So, these were apparently Matt's tweaks to changes being integrated from //public/jam, and we'll ignore them here. |
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#3 | 486 | Perforce staff |
Jam 2.3. See RELNOTES for a list of changes from 2.2.x. Just about every source file was touched when jam got ANSI-fied. |
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#2 | 212 | Perforce staff |
An interpretative integration of Peter Glasscock's -o file support. This is handled in the make1() routine, rather than in all the exec*.c files. -o x writes the actions to file x rather than actually running them. Implies -n (but not -d2). |
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#1 | 2 | laura | Add Jam/MR 2.2 source |