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[= AutoGen5 Template c=fork.c -*- Mode: C -*- =]
[= # Time-stamp: "2012-04-07 09:56:01 bkorb"
* This file is part of AutoGen.
* AutoGen Copyright (c) 1992-2012 by Bruce Korb - all rights reserved
*
* AutoGen 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 3 of the License, or
* (at your option) any later version.
*
* AutoGen 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, see <http://www.gnu.org/licenses/>.
=][=
(define up-c-name (lambda (ag-name)
(string-upcase! (string->c-name! (get ag-name))) ))
(dne " * " "/* ")=]
*
* This module will fire up autogen and have it read definitions
* from its standard-in.
*/
static char const zFsError[] = "%s fs ERROR %d (%s) on %s\n";
static void
add_arg(char const * arg, int ix)
{
char ** arg_vec = xml2agOptions.origArgVect;
int arg_ct = xml2agOptions.origArgCt;
if (ix >= (int)arg_ct) {
arg_ct += 5;
arg_vec = realloc(arg_vec, sizeof(void*) * (arg_ct+1));
if (arg_vec == NULL) {
fprintf(stderr, "No memory for %d args\n", arg_ct);
exit(EXIT_FAILURE);
}
xml2agOptions.origArgVect = arg_vec;
}
arg_vec[ ix ] = (void*)arg;
}
static int
become_child(int * fd, char const* pzInput)
{
if (pipe(fd) != 0) {
fprintf(stderr, zFsError, xml2agOptions.pzProgName,
errno, strerror( errno ), "pipe(2)");
exit(EXIT_FAILURE);
}
fflush(stdout);
fflush(stdin);
switch (fork()) {
case -1:
fprintf(stderr, zFsError, xml2agOptions.pzProgName,
errno, strerror( errno ), "fork(2)");
exit(EXIT_FAILURE);
case 0:
fclose(stdin);
if (dup2(fd[0], STDIN_FILENO) != STDIN_FILENO) {
fprintf(stderr, zFsError, xml2agOptions.pzProgName,
errno, strerror( errno ), "dup2(2) w/ STDIN_FILENO");
exit(EXIT_FAILURE);
}
close(fd[1]);
break;
default:
errno = 0;
outFp = fdopen(fd[1], "w");
if (outFp == NULL) {
fprintf(stderr, zFsError, xml2agOptions.pzProgName,
errno, strerror( errno ), "fdopen(2) w/ pipe[1]");
exit(EXIT_FAILURE);
}
close(fd[0]);
return 0;
}
if (! HAVE_OPT( BASE_NAME )) {
if (pzInput == NULL)
pzInput = "stdin";
else {
char* pz = strrchr(pzInput, '.');
if (pz != NULL) {
pzInput = pz = strdup(pzInput);
pz = strrchr(pz, '.');
*pz = '\0';
}
}
SET_OPT_BASE_NAME(pzInput);
}
return 1;
}
void
forkAutogen(char const* pzInput)
{
int fd[2];
if (! become_child(fd, pzInput))
return;
{
static char const zAg[] = "autogen";
char* pzArg;
int ix = 1;
{
char* pz = malloc(strlen( xml2agOptions.pzProgPath ) + 7);
char* p = strrchr(xml2agOptions.pzProgPath, '/');
if (p == NULL) {
strcpy(pz, zAg);
} else {
size_t len = (p - xml2agOptions.pzProgPath) + 1;
memcpy(pz, xml2agOptions.pzProgPath, len);
strcpy(pz + len, zAg);
}
add_arg(pz, 0);
}[=
FOR flag =][=
IF (define opt-name (up-c-name "name"))
(and
(not (~~ opt-name "OVERRIDE_TPL|OUTPUT"))
(not (exist? "documentation"))
) =][=
INVOKE handle-option =][=
ENDIF (not override) =][=
ENDFOR =]
xml2agOptions.origArgVect[ix] = NULL;
execvp(xml2agOptions.origArgVect[0], xml2agOptions.origArgVect);
/*
* IF the first try fails, it may be because xml2ag and autogen have
* different paths. Try again with just plain "autogen" and let
* the OS search "PATH" for the program.
*/
execvp(zAg, xml2agOptions.origArgVect);
fprintf(stderr, zFsError, xml2agOptions.pzProgName,
errno, strerror(errno), "execvp(2)");
exit(EXIT_FAILURE);
}
}
/*
* Local Variables:
* c-file-style: "stroustrup"
* indent-tabs-mode: nil
* End:
* end of [= (out-name) =] */
[=
DEFINE handle-option =]
if (HAVE_OPT([=(. opt-name)=])) {[=
CASE arg-type =][=
==* key =]
static char const * kwlist[] = {
[=(shellf "${CLexe:-columns} -I16 -f'\"%%s\"' -S, --spread=2 <<_EOF_\n%s\n_EOF_"
(join "\n" (stack "keyword")) )=] };
pzArg = malloc([= (+ 4 (string-length (get "name")))
=] + strlen( kwlist[ OPT_VALUE_[=(. opt-name)=] ] ));
sprintf(pzArg, "--[=name=]=%s", kwlist[ OPT_VALUE_[=
(. opt-name)=] ]);
add_arg(pzArg, ix++);[=
==* num =]
pzArg = malloc((size_t)[= (+ 16 (string-length (get "name"))) =]);
sprintf(pzArg, "--[=name=]=%d", (int)OPT_VALUE_[=(. opt-name)=]);
add_arg(pzArg, ix++);[=
==* bool =]
static char z[] = "--[=name=]=false";
if (OPT_VALUE_[=(. opt-name)=])
strcpy(z + [= (+ 3 (string-length (get "name"))) =], "true");
add_arg(z, ix++);[=
==* str =][=
IF (exist? "max") =]
int optCt = STACKCT_OPT([=(. opt-name)=]);
char const ** ppOA = STACKLST_OPT([=(. opt-name)=]);
do {
char const * pA = *(ppOA++);
pzArg = malloc([= (+ 4 (string-length (get "name")))
=] + strlen(pA));
sprintf(pzArg, "--[=name=]=%s", pA);
add_arg(pzArg, ix++);
} while (--optCt > 0);[=
ELSE !exists-max =]
pzArg = malloc([= (+ 4 (string-length (get "name")))
=] + strlen( OPT_ARG( [=(. opt-name)=] )));
sprintf(pzArg, "--[=name=]=%s", OPT_ARG( [=(. opt-name)=] ));
add_arg(pzArg, ix++);[=
ENDIF exists-max =][=
== "" =]
add_arg("--[=name=]", ix++);[=
ESAC arg-type =]
}[=
ENDDEF handle-option
\=]
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