system.c

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#include <grass/config.h>
#include <stdlib.h>
#include <unistd.h>
#include <signal.h>
#include <stdio.h>
#include <sys/types.h>
#ifndef __MINGW32__
#include <sys/wait.h>
#endif
#include <grass/gis.h>
#include <grass/glocale.h>


int G_system(const char *command)
{
    int status;

#ifndef __MINGW32__
    int pid, w;
#endif
    RETSIGTYPE(*sigint) ();
#ifdef SIGQUIT
    RETSIGTYPE(*sigquit) ();
#endif

    sigint = signal(SIGINT, SIG_IGN);
#ifdef SIGQUIT
    sigquit = signal(SIGQUIT, SIG_IGN);
#endif

    fflush(stdout);
    fflush(stderr);

#ifdef __MINGW32__
    signal(SIGINT, SIG_DFL);
    _spawnlp(P_WAIT, "cmd.exe", "cmd.exe", "/c", command, NULL);
    status = 0;
#else
    if ((pid = fork()) == 0) {
        signal(SIGINT, SIG_DFL);
        signal(SIGQUIT, SIG_DFL);

        execl("/bin/sh", "sh", "-c", command, NULL);
        _exit(127);
    }

    if (pid < 0) {
        G_warning(_("Can not create a new process!"));
        status = -1;
    }
    else {
        while ((w = wait(&status)) != pid && w != -1) ;

        if (w == -1)
            status = -1;
    }

#endif

    signal(SIGINT, sigint);
#ifdef SIGQUIT
    signal(SIGQUIT, sigquit);
#endif

    return (status);
}