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#include "sysdep.h"
#include "c_config.h"
#include "console.h"
#include "gui.h"
#include <assert.h>
#include <fcntl.h>
#include <signal.h>
#include <sys/wait.h>
#include <stdio.h>
//#include <time.h>
#define MAX_PIPES 20
struct GPipe {
int fd;
int pid;
int stopped;
EModel *notify;
GPipe() : fd(-1), pid(0), stopped(0), notify(NULL) {}
};
static GPipe Pipes[MAX_PIPES];
/*
* Returns WaitFdPipe status of event.
*/
WaitFdPipe WaitFdPipeEvent(TEvent *Event, int fd, int fd2, int WaitTime)
{
struct timeval timeout;
fd_set readfds;
int rc, maxfd = (fd > fd2) ? fd : fd2;
Event->What = evNone;
FD_ZERO(&readfds);
if (fd >= 0)
FD_SET(fd, &readfds);
if (fd2 >= 0)
FD_SET(fd2, &readfds);
#ifndef NO_PIPES
for (int p = 0; p < MAX_PIPES; ++p)
if (Pipes[p].fd != -1) {
FD_SET(Pipes[p].fd, &readfds);
if (Pipes[p].fd > maxfd)
maxfd = Pipes[p].fd;
}
#endif
//printf("EVENT %d: %d %d %d\n", (int)time(NULL), fd, fd2, WaitTime);
timeout.tv_sec = WaitTime / 1000;
timeout.tv_usec = (WaitTime % 1000) * 1000;
if ((rc = select(maxfd + 1, &readfds, 0, 0,
(WaitTime < 0) ? 0 : &timeout)) <= 0)
return (!rc) ? FD_PIPE_TIMEOUT : FD_PIPE_ERROR;
if ((fd >= 0) && FD_ISSET(fd, &readfds))
return FD_PIPE_1;
if ((fd2 >= 0) && FD_ISSET(fd2, &readfds))
return FD_PIPE_2;
#ifndef NO_PIPES
for (int pp = 0; pp < MAX_PIPES; ++pp) {
if (Pipes[pp].fd != -1
&& FD_ISSET(Pipes[pp].fd, &readfds)
&& Pipes[pp].notify) {
Event->What = evNotify;
Event->Msg.View = 0;
Event->Msg.Model = Pipes[pp].notify;
Event->Msg.Command = cmPipeRead;
Event->Msg.Param1 = pp;
Pipes[pp].stopped = 0;
return FD_PIPE_EVENT;
}
//fprintf(stderr, "Pipe %d\n", Pipes[pp].fd);
}
#endif
return FD_PIPE_ERROR;
}
int GUI::OpenPipe(const char *Command, EModel * notify)
{
//fprintf(stderr, "PIPE %s \n", Command);
#ifndef NO_PIPES
for (int i = 0; i < MAX_PIPES; ++i) {
if (Pipes[i].fd == -1) {
int pfd[2];
Pipes[i].notify = notify;
Pipes[i].stopped = 1;
if (pipe((int *) pfd) == -1) {
perror("pipe");
return -1;
}
switch (Pipes[i].pid = fork()) {
case -1: /* fail */
perror("fork");
return -1;
case 0: /* child */
// FIXME: close other opened descriptor
signal(SIGPIPE, SIG_DFL);
close(pfd[0]);
close(0);
assert(open("/dev/null", O_RDONLY) == 0);
dup2(pfd[1], 1);
dup2(pfd[1], 2);
close(pfd[1]);
exit(system(Command));
default:
close(pfd[1]);
fcntl(pfd[0], F_SETFL, O_NONBLOCK);
Pipes[i].fd = pfd[0];
}
return i;
}
}
#endif
return -1;
}
int GUI::SetPipeView(int id, EModel * notify)
{
#ifndef NO_PIPES
if (id < 0 || id >= MAX_PIPES || Pipes[id].fd == -1)
return 0;
Pipes[id].notify = notify;
#endif
return 1;
}
/*
* returns read size value from pipe reading
*/
ssize_t GUI::ReadPipe(int id, void *buffer, size_t len)
{
#ifndef NO_PIPES
if (id < 0 || id >= MAX_PIPES || Pipes[id].fd == -1)
return -1;
ssize_t rc;
if (!(rc = read(Pipes[id].fd, buffer, len))) {
close(Pipes[id].fd);
Pipes[id].fd = -1;
return -1;
} else if (rc == -1)
Pipes[id].stopped = 1;
return rc;
#else
return -1;
#endif
}
int GUI::ClosePipe(int id)
{
#ifndef NO_PIPES
int status = -1;
if (id < 0 || id >= MAX_PIPES || Pipes[id].fd == -1)
return 0;
close(Pipes[id].fd);
Pipes[id].fd = -1;
kill(Pipes[id].pid, SIGHUP);
alarm(1);
waitpid(Pipes[id].pid, &status, 0);
alarm(0);
return (WEXITSTATUS(status) == 0);
#endif
return 0;
}
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