int
capture_output_to_menu(FileView *view, const char cmd[], menu_info *m)
{
FILE *file, *err;
char *line = NULL;
int x;
pid_t pid;
LOG_INFO_MSG("Capturing output of the command to a menu: %s", cmd);
pid = background_and_capture((char *)cmd, &file, &err);
if(pid == (pid_t)-1)
{
show_error_msgf("Trouble running command", "Unable to run: %s", cmd);
return 0;
}
show_progress("", 0);
ui_cancellation_reset();
ui_cancellation_enable();
wait_for_data_from(pid, file, 0);
x = 0;
while((line = read_line(file, line)) != NULL)
{
char *expanded_line;
show_progress("Loading menu", 1000);
m->items = realloc(m->items, sizeof(char *)*(x + 1));
expanded_line = expand_tabulation_a(line, cfg.tab_stop);
if(expanded_line != NULL)
{
m->items[x++] = expanded_line;
}
wait_for_data_from(pid, file, 0);
}
m->len = x;
ui_cancellation_disable();
fclose(file);
print_errors(err);
if(ui_cancellation_requested())
{
append_to_string(&m->title, "(cancelled) ");
append_to_string(&m->empty_msg, " (cancelled)");
}
return display_menu(m, view);
}
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
}
