int
run_in_shell_no_cls(char command[])
{
typedef void (*sig_handler)(int);
int pid;
int result;
extern char **environ;
sig_handler sigtstp_handler;
if(command == NULL)
return 1;
sigtstp_handler = signal(SIGTSTP, SIG_DFL);
/* We need to block SIGCHLD signal. One can't just set it to SIG_DFL, because
* it will possibly cause missing of SIGCHLD from a background process
* (job). */
(void)set_sigchld(1);
pid = fork();
if(pid == -1)
{
signal(SIGTSTP, sigtstp_handler);
(void)set_sigchld(0);
return -1;
}
if(pid == 0)
{
char *args[4];
signal(SIGTSTP, SIG_DFL);
signal(SIGINT, SIG_DFL);
(void)set_sigchld(0);
args[0] = cfg.shell;
args[1] = "-c";
args[2] = command;
args[3] = NULL;
execve(cfg.shell, args, environ);
exit(127);
}
result = get_proc_exit_status(pid);
signal(SIGTSTP, sigtstp_handler);
(void)set_sigchld(0);
return result;
}
int
background_and_wait_for_errors(char cmd[], int cancellable)
{
#ifndef _WIN32
pid_t pid;
int error_pipe[2];
int result = 0;
if(pipe(error_pipe) != 0)
{
error_msg("File pipe error", "Error creating pipe");
return -1;
}
(void)set_sigchld(1);
if((pid = fork()) == -1)
{
(void)set_sigchld(0);
return -1;
}
if(pid == 0)
{
(void)set_sigchld(0);
run_from_fork(error_pipe, 1, cmd);
}
else
{
char buf[80*10];
char linebuf[80];
int nread = 0;
close(error_pipe[1]); /* Close write end of pipe. */
if(cancellable)
{
ui_cancellation_enable();
}
wait_for_data_from(pid, NULL, error_pipe[0]);
buf[0] = '\0';
while((nread = read(error_pipe[0], linebuf, sizeof(linebuf) - 1)) > 0)
{
const int read_empty_line = nread == 1 && linebuf[0] == '\n';
result = -1;
linebuf[nread] = '\0';
if(!read_empty_line)
{
strncat(buf, linebuf, sizeof(buf) - strlen(buf) - 1);
}
wait_for_data_from(pid, NULL, error_pipe[0]);
}
close(error_pipe[0]);
if(cancellable)
{
ui_cancellation_disable();
}
if(result != 0)
{
error_msg("Background Process Error", buf);
}
else
{
/* Don't use "const int" variables with WEXITSTATUS() as they cause
* compilation errors in case __USE_BSD is defined. Anonymous type with
* "const int" is composed via compound literal expression. */
int status = get_proc_exit_status(pid);
result = (status != -1 && WIFEXITED(status)) ? WEXITSTATUS(status) : -1;
}
}
(void)set_sigchld(0);
return result;
#else
return -1;
#endif
}
