/*
scconfig - detection of standard library features (processes)
Copyright (C) 2016 Tibor Palinkas
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
Project page: http://repo.hu/projects/scconfig
Contact via email: scconfig [at] igor2.repo.hu
*/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include "libs.h"
#include "log.h"
#include "db.h"
#include "dep.h"
int find_proc__spawnvp(const char *name, int logdepth, int fatal)
{
char *test_c =
NL "#include <stdlib.h>"
NL "int main() {"
NL " const char *a[3] = {\"/c\", \"echo OK\", NULL};"
NL " _spawnvp(_P_WAIT, \"cmd\", a);"
NL " return 0;"
NL "}"
NL ;
require("cc/cc", logdepth, fatal);
report("Checking for _spawnvp... ");
logprintf(logdepth, "find_proc__spawnvp: trying to find _spawnvp...\n");
logdepth++;
if (try_icl(logdepth, "libs/proc/_spawnvp", test_c, "#include <process.h>", NULL, NULL)) return 0;
return try_fail(logdepth, "libs/proc/_spawnvp");
}
int find_proc_fork(const char *name, int logdepth, int fatal)
{
char *test_c =
NL "#include <stdlib.h>"
NL "#include <stdio.h>"
NL "int main() {"
NL " if (fork() == 0) { return 0; }"
NL " puts(\"OK\");"
NL " return 0;"
NL "}"
NL ;
/* NOTE: can't print OK from the child process because of a possible race
with the parent immediately exiting without wait(). */
require("cc/cc", logdepth, fatal);
report("Checking for fork... ");
logprintf(logdepth, "find_proc_fork: trying to find fork...\n");
logdepth++;
if (try_icl(logdepth, "libs/proc/fork", test_c, "#include <unistd.h>", NULL, NULL)) return 0;
return try_fail(logdepth, "libs/proc/fork");
}
int find_proc_wait(const char *name, int logdepth, int fatal)
{
char *inc;
const char *inc1;
char test_c[1024];
char *test_c_in =
NL "%s\n"
NL "#include <stdlib.h>"
NL "#include <stdio.h>"
NL "int main() {"
NL " int st = 0;"
NL " if (fork() == 0) {"
NL " printf(\"O\");"
NL " return 42;"
NL " }"
NL " wait(&st);"
NL " if (WIFEXITED(st) && (WEXITSTATUS(st) == 42))"
NL " printf(\"K\");"
NL " else"
NL " printf(\"%%d\", st);"
NL " printf(\"\\n\");"
NL " return 0;"
NL "}"
NL ;
require("cc/cc", logdepth, fatal);
if (require("libs/proc/fork", logdepth, fatal))
return try_fail(logdepth, "libs/proc/wait");
report("Checking for wait... ");
logprintf(logdepth, "find_proc_wait: trying to find wait...\n");
logdepth++;
inc1 = get("libs/proc/fork/includes");
if (inc1 != NULL) {
char *i, *o;
inc = strclone(inc1);
for(i = o = inc; *i != '\0'; i++,o++) {
if ((i[0] == '\\') && (i[1] == 'n')) {
*o = '\n';
i++;
}
else
*o = *i;
}
*o = '\0';
sprintf(test_c, test_c_in, inc);
free(inc);
}
else
sprintf(test_c, test_c_in, "");
if (try_icl(logdepth, "libs/proc/wait", test_c, "#include <sys/types.h>\n#include <sys/wait.h>", NULL, NULL)) return 0;
return try_fail(logdepth, "libs/proc/wait");
}