/* vms_gawk.c -- parse GAWK command line using DCL syntax
Copyright (C) 1991-1993, 1996, 2003, 2005, 2011, 2014
the Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software Foundation,
Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
/*
* vms_gawk.c - routines to parse the command line as a native DCL command
* rather than as a foreign command string.
* Pat Rankin, Nov'89
* [ revised for 2.12, May'91 ]
* [ revised for 4.0.0, Feb'11 ]
*/
#include "awk.h"
#include "vms.h"
#define USAGE_PROG_RQRD 1
#define USAGE_FILE_RQRD 2
#define USAGE_BAD_COMBO 3
#define USAGE_RUN_CMD 4
#define STS$M_INHIB_MSG 0x10000000
#define Present(arg) vmswork(Cli_Present(arg))
#define Get_Value(arg,buf,siz) vmswork(Cli_Get_Value(arg,buf,siz))
#ifndef __DECC
extern void GAWK_CMD(); /* created with $ SET COMMAND/OBJECT */
#define gawk_cmd ((const void *)GAWK_CMD) */
#else /* Use ANSI definitions for DEC C */
#pragma extern_model save
#pragma extern_model strict_refdef
/* (could use globalvalue rather than _refdef if we omit GAWK_CMD's `&') */
extern void *GAWK_CMD;
#pragma extern_model restore
#define gawk_cmd ((const void *)&GAWK_CMD)
#endif
extern void _exit(int);
static int vms_usage(int);
static const char *CmdName = "GAWK";
#define ARG_SIZ 250
union arg_w_prefix { /* structure used to simplify prepending of "-" */
char value[2+ARG_SIZ+1];
struct {
char prefix[2]; /* for "-?" */
char buf[ARG_SIZ];
char suffix[1]; /* room for '\0' */
} arg;
};
#define chk_option(qualifier,optname) \
if (Present(qualifier)) \
strcat(strcat(buf.arg.buf, W_cnt++ ? "," : ""), optname)
/* vms_gawk() - parse GAWK command line using DCL and convert it into the */
/* appropriate "-arg" values for compatability with GNU code */
int
vms_gawk()
{
U_Long sts;
union arg_w_prefix buf;
char misc_args[10], *misc_argp;
int argc, W_cnt;
int native_dcl = 1, /* assume true until we know otherwise */
short_circ; /* some options make P1, /commands, /input superfluous */
/* check "GAWK_P1"--it's required; its presence will tip us off */
sts = Cli_Present("GAWK_P1");
if (CondVal(sts) == CondVal(CLI$_SYNTAX)) {
native_dcl = 0; /* not invoked via a native command verb */
/* syntax error indicates that we weren't invoked as a native DCL
command, so we'll now attempt to generate a command from the
foreign command string and parse that.
*/
sts = Cli_Parse_Command(gawk_cmd, "GAWK"); /* (*not* CmdName) */
if (vmswork(sts))
sts = Cli_Present("GAWK_P1");
}
short_circ = Present("USAGE") || Present("VERSION") || Present("COPYRIGHT");
if (vmswork(sts)) /* command parsed successfully */
v_add_arg(argc = 0, CmdName); /* save "GAWK" as argv[0] */
else if (CondVal(sts) == CondVal(CLI$_INSFPRM))
/* vms_usage() will handle /usage, /version, and /copyright */
return short_circ ? vms_usage(0)
: native_dcl ? vms_usage(USAGE_FILE_RQRD) : 0; /* insufficient parameters */
else if (CondVal(sts) == CondVal(CLI$_CONFLICT))
return vms_usage(USAGE_BAD_COMBO); /* conflicting qualifiers (/input+/command) */
#if 0 /* 3.1.2: removed since this can't distinguish RUN vs fork+exec */
else if (CondVal(sts) == CondVal(CLI$_RUNUSED))
return vms_usage(USAGE_RUN_CMD); /* RUN GAWK won't work (no command line) */
#endif
else
return 0; /* forced to rely on original parsing */
if (short_circ) /* give usage message & quit or have main() */
return vms_usage(0); /* give --version or --copyleft mesg & quit */
else if (! (Present("PROGRAM") || Present("PROGFILE")) )
return native_dcl ? vms_usage(USAGE_PROG_RQRD) : 0; /* missing required option */
misc_argp = misc_args;
*misc_argp++ = '-'; /* now points at &misc_args[1] */
if (Present("OPTIMIZE"))
*misc_argp++ = 'O';
W_cnt = 0, buf.arg.buf[0] = '\0';
strncpy(buf.arg.prefix, "-W", 2);
if (Present("LINT")) {
if (!Present("LINT.FATAL") && !Present("LINT.INVALID"))
chk_option("LINT.WARN", "lint");
chk_option("LINT.FATAL", "lint=fatal");
chk_option("LINT.INVALID", "lint=invalid");
chk_option("LINT.OLD", "lint-old"); /* distinct option */
}
chk_option("POSIX", "posix");
if (CondVal(Cli_Present("TRADITIONAL")) != CondVal(CLI$_NEGATED))
chk_option("STRICT", "traditional"); /* /strict is synonym for /traditional */
if (CondVal(Cli_Present("STRICT")) != CondVal(CLI$_NEGATED))
chk_option("TRADITIONAL", "traditional");
chk_option("RE_INTERVAL", "re-interval"); /* only used with /traditional */
chk_option("SANDBOX", "sandbox");
/* potentially a problem due to leading "NO" */
chk_option("NON_DECIMAL_DATA", "non-decimal-data");
/* note: locale and translation stuff is not supported by vms gawk */
chk_option("CHARACTERS_AS_BYTES", "characters-as-bytes");
chk_option("USE_LC_NUMERIC", "use-lc-numeric");
chk_option("GEN_POT", "gen-pot");
# if 0
/* /copyright and /version don't reach here anymore (short_circ above) */
chk_option("COPYRIGHT", "copyright"); /* --copyleft */
chk_option("VERSION", "version");
# endif
if (W_cnt > 0) /* got something */
v_add_arg(++argc, strdup(buf.value));
#ifdef DEBUG /* most debugging functionality moved to separate DGAWK program */
if (Present("DEBUG"))
*misc_argp++ = 'Y'; /* --parsedebug */
#endif
*misc_argp = '\0'; /* terminate misc_args[] */
if (misc_argp > &misc_args[1]) /* got something */
v_add_arg(++argc, misc_args); /* store it/them */
if (Present("PROFILE")) { /* /profile[=file] */
strncpy(buf.arg.prefix, "-p", 2);
if (Get_Value("PROFILE", buf.arg.buf, sizeof buf.arg.buf))
v_add_arg(++argc, strdup(buf.value));
}
if (Present("DUMP_VARIABLES")) { /* /dump_variables[=file] */
strncpy(buf.arg.prefix, "-d", 2);
if (Get_Value("DUMP_VARIABLES", buf.arg.buf, sizeof buf.arg.buf))
v_add_arg(++argc, strdup(buf.value));
}
if (Present("FIELD_SEP")) { /* field separator */
strncpy(buf.arg.prefix, "-F", 2);
if (Get_Value("FIELD_SEP", buf.arg.buf, sizeof buf.arg.buf))
v_add_arg(++argc, strdup(buf.value));
}
if (Present("VARIABLES")) { /* variables to init prior to BEGIN */
strncpy(buf.arg.prefix, "-v", 2);
while (Get_Value("VARIABLES", buf.arg.buf, sizeof buf.arg.buf))
v_add_arg(++argc, strdup(buf.value));
}
/* the relative order of -e and -f args matters; unfortunately,
we're losing that here... */
if (Present("MOREPROG")) { /* /extra_input=text -> -e text */
strncpy(buf.arg.prefix, "-e", 2);
if (Get_Value("MOREPROG", buf.arg.buf, sizeof buf.arg.buf))
v_add_arg(++argc, strdup(buf.value));
}
if (Present("PROGFILE")) { /* program files, /input=file -> -f file */
strncpy(buf.arg.prefix, "-f", 2);
while (Get_Value("PROGFILE", buf.arg.buf, sizeof buf.arg.buf))
v_add_arg(++argc, strdup(buf.value));
v_add_arg(++argc, "--");
} else if (Present("PROGRAM")) { /* program text, /commands -> 'text' */
v_add_arg(++argc, "--");
if (Get_Value("PROGRAM", buf.value, sizeof buf.value))
v_add_arg(++argc, strdup(buf.value));
}
/* we know that "GAWK_P1" is present [data files and/or 'var=value'] */
while (Get_Value("GAWK_P1", buf.value, sizeof buf.value))
v_add_arg(++argc, strdup(buf.value));
if (Present("OUTPUT")) { /* let other parser treat this as 'stdout' */
strncpy(buf.arg.prefix, ">$", 2);
if (Get_Value("OUTPUT", buf.arg.buf, sizeof buf.arg.buf))
v_add_arg(++argc, strdup(buf.value));
}
return ++argc; /*(increment to account for arg[0])*/
}
/* vms_usage() - display one or more messages and then terminate */
static int /* note: usually doesn't return */
vms_usage( int complaint )
{
static const char
*usage_txt = "\n\
usage: %s /COMMANDS=\"awk program text\" data_file[,data_file,...] \n\
or %s /INPUT=awk_file data_file[,\"Var=value\",data_file,...] \n\
or %s /INPUT=(awk_file1,awk_file2,...) data_file[,...] \n\
or %s /INPUT=awk_file /EXTRA_COMMANDS=\"program text\" data_file \n\
",
*options_txt = "\n\
options: /FIELD_SEPARATOR=\"FS_value\" \n\
and /VARIABLES=(\"Var1=value1\",\"Var2=value2\",...) \n\
and /OPTIMIZE /PROFILE[=file] /DUMP_VARIABLES[=file] \n\
and /POSIX /[NO]TRADITIONAL /[NO]STRICT /RE_INTERVAL \n\
and /SANDBOX /NON_DECIMAL_DATA \n\
and /LINT[=WARN] or /LINT=OLD or /LINT=FATAL \n\
and /VERSION /COPYRIGHT /USAGE \n\
and /OUTPUT=out_file \n\
", /* omitted: /LINT=INVALID /CHARACTERS_AS_BYTES /USE_LC_NUMERIC /GEN_POT */
*no_prog = "missing required element: /COMMANDS or /INPUT",
*no_file = "missing required element: data_file \n\
(use \"SYS$INPUT:\" to read data lines from the terminal)",
*bad_combo = "invalid combination of qualifiers \n\
(/INPUT=awk_file and /COMMANDS=\"awk program\" are mutually exclusive)",
*run_used = "\"RUN\" was used; required command components missing";
int status, argc;
/* presence of /usage, /version, or /copyright for feedback+quit
supersedes absence of required program or data file */
if (Present("USAGE")) {
complaint = 0; /* clean exit */
} else if (Present("VERSION") || Present("COPYRIGHT")) {
/* construct a truncated Unix-style command line to control main() */
v_add_arg(argc=0, CmdName); /* save "GAWK" as argv[0] */
#if 0
v_add_arg(++argc, Present("VERSION") ? "-V" : "-C");
#else
v_add_arg(++argc, "-W");
v_add_arg(++argc, Present("VERSION") ? "version" : "copyright");
#endif
/* kludge to suppress 'usage' message from main() */
v_add_arg(++argc, "--"); /* no more arguments */
v_add_arg(++argc, "{}"); /* dummy program text */
v_add_arg(++argc, "NL:"); /* dummy input file */
return ++argc; /* count argv[0] too */
}
fflush(stdout);
switch (complaint) {
case USAGE_PROG_RQRD:
fprintf(stderr, "\n%%%s-W-%s, %s \n", CmdName, "PROG_RQRD", no_prog);
status = CLI$_VALREQ | STS$M_INHIB_MSG;
break;
case USAGE_FILE_RQRD:
fprintf(stderr, "\n%%%s-W-%s, %s \n", CmdName, "FILE_RQRD", no_file);
status = CLI$_INSFPRM | STS$M_INHIB_MSG;
break;
case USAGE_BAD_COMBO:
fprintf(stderr, "\n%%%s-W-%s, %s \n", CmdName, "BAD_COMBO", bad_combo);
status = CLI$_CONFLICT | STS$M_INHIB_MSG;
break;
case USAGE_RUN_CMD:
fprintf(stderr, "\n%%%s-W-%s, %s \n", CmdName, "RUN_CMD", run_used);
status = CLI$_NOOPTPRS | STS$M_INHIB_MSG;
break;
default:
status = 1;
break;
}
fprintf(stderr, usage_txt, CmdName, CmdName, CmdName, CmdName);
fprintf(stderr, options_txt);
fflush(stderr);
errno = EVMSERR;
vaxc$errno = status;
_exit(status);
/* NOTREACHED */
return 0;
}