Fix a #'setenv bug, merge other changes from GNU's env.el. 2007-12-14 Aidan Kehoe <kehoea@parhasard.net> * process.el (substitute-env-vars): Merge an example from GNU's docstring. * process.el (setenv): Pass nil as the default abbrev table to the #'read-from-minibuffer call, instead of passing the current value of the variable. Bug introduced by an incorrect sync from GNU by Ben; reported by Thomas Mittelstaedt in 47626712.40609@cadenas.de. Document the #'set-time-zone-rule call when TZ is set. Push the old value on to the beginning of setenv-history. (Both merged from GNU.) Document that we don't do the coding-system frobbing at this level that GNU does. Provide a commented-out, sample implementation of GNU's #'environment; document why I think we shouldn't include it.

/* Synched up with: FSF 19.28. */

#include <sgtty.h>
#include <signal.h>
#define STRLEN 100
static char str[STRLEN+1] = "%?emacs"; /* extra char for the null */

switch_to_proc(){
    char *ptr = str;
    while (*ptr) ioctl(0, TIOCSTI, ptr++);
    ioctl(0, TIOCSTI, "\n");
    kill(getpid(), SIGTSTP);
    }

set_proc_str(ptr) char *ptr; {
    if (strlen(ptr) <= STRLEN)
	strcpy(str, ptr);
    else
	printf("string too long for set-proc-str: %s\n", ptr);
    }