arc/load.arc


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; support for dividing arc files into sections of different level, and
; selectively loading just sections at or less than a given level

; usage:
;   load.arc [level] [arc files] -- [mu files]

(def selective-load (file (o level 999))
;?   (prn "loading @file at level @level")
  (fromfile file
    (whilet expr (read)
;?       (prn car.expr)
      (if (is 'section expr.0)
        (when (<= expr.1 level)
          (each x (cut expr 2)
            (eval x)))
        (eval expr))
;?       (prn car.expr " done")
      )))

(= section-level 999)
(point break
(each x (map [fromstring _ (read)] cdr.argv)
  (if (isa x 'int)
        (= section-level x)
      (is '-- x)
        (break)  ; later args are mu files
      :else
        (selective-load string.x section-level))))
/* See LICENSE file for copyright and license details. */
#include "dwm.h"
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/wait.h>
#include <unistd.h>

/* extern */

void *
emallocz(unsigned int size) {
	void *res = calloc(1, size);

	if(!res)
		eprint("fatal: could not malloc() %u bytes\n", size);
	return res;
}

void
eprint(const char *errstr, ...) {
	va_list ap;

	va_start(ap, errstr);
	vfprintf(stderr, errstr, ap);
	va_end(ap);
	exit(EXIT_FAILURE);
}

void
spawn(const char *arg) {
	static char *shell = NULL;

	if(!shell && !(shell = getenv("SHELL")))
		shell = "/bin/sh";
	if(!arg)
		return;
	/* The double-fork construct avoids zombie processes and keeps the code
	 * clean from stupid signal handlers. */
	if(fork() == 0) {
		if(fork() == 0) {
			if(dpy)
				close(ConnectionNumber(dpy));
			setsid();
			execl(shell, shell, "-c", arg, (char *)NULL);
			fprintf(stderr, "dwm: execl '%s -c %s'", shell, arg);
			perror(" failed");
		}
		exit(0);
	}
	wait(0);
}