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#include <unistd.h>
#include <stdio.h>
#include <signal.h>
#include <sys/types.h>
#ifdef __MINGW32__
# include <io.h>
# include <fcntl.h>
# include <process.h>
#else
# include <sys/wait.h>
# define tst(a,b) (*mode == 'r'? (b) : (a))
#endif
#include "gis.h"
#define READ 0
#define WRITE 1
static int popen_pid[50];
FILE *G_popen(
char *cmd,
char *mode)
{
#ifdef __MINGW32__
int thepipes[2];
FILE *rv = NULL;
fflush (stdout);
fflush (stderr);
/*setvbuf ( stdout, NULL, _IONBF, 0 );*/
if ( _pipe ( thepipes, 256, O_BINARY ) != -1 ) {
execl ( "cmd", "cmd", "/c", cmd, 0 );
close ( thepipes[WRITE] );
rv = fdopen ( thepipes[READ], mode );
}
return ( rv );
#else /* __MINGW32__ */
int p[2];
int me, you, pid;
fflush (stdout);
fflush (stderr);
if(pipe(p) < 0)
return NULL;
me = tst(p[WRITE], p[READ]);
you = tst(p[READ], p[WRITE]);
if((pid = fork()) == 0)
{
/* me and you reverse roles in child */
close(me);
close(tst(0, 1));
dup(you);
close(you);
execl("/bin/sh", "sh", "-c", cmd, 0);
_exit(1);
}
if(pid == -1)
return NULL;
popen_pid[me] = pid;
close(you);
return(fdopen(me, mode));
#endif /* __MINGW32__ */
}
int G_pclose( FILE *ptr)
{
void (*sigint)();
#ifdef SIGHUP
void (*sighup)();
#endif
#ifdef SIGQUIT
void (*sigquit)();
#endif
int f, r;
int status;
f = fileno(ptr);
fclose(ptr);
sigint = signal(SIGINT, SIG_IGN);
#ifdef __MINGW32__
_cwait ( &status, popen_pid[f], WAIT_CHILD );
if ( 0 & status ) {
status = -1;
}
#else
#ifdef SIGQUIT
sigquit = signal(SIGQUIT, SIG_IGN);
#endif
#ifdef SIGHUP
sighup = signal(SIGHUP, SIG_IGN);
#endif
while((r = wait(&status)) != popen_pid[f] && r != -1)
;
if(r == -1)
status = -1;
#endif /* __MINGW32__ */
signal(SIGINT, sigint);
#ifdef SIGQUIT
signal(SIGQUIT, sigquit);
#endif
#ifdef SIGHUP
signal(SIGHUP, sighup);
#endif
return(status);
}
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