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/* ISC license. */
#include <string.h>
#include <errno.h>
#include <utmpx.h>
#include <skalibs/posixishard.h>
#include <skalibs/allreadwrite.h>
#include <skalibs/strerr2.h>
#include <skalibs/djbunix.h>
#include "hpr.h"
#ifndef UT_LINESIZE
#define UT_LINESIZE 32
#endif
void hpr_wall (char const *s)
{
size_t n = strlen(s) ;
char tty[10 + UT_LINESIZE] = "/dev/" ;
char msg[n+1] ;
memcpy(msg, s, n) ;
msg[n++] = '\n' ;
setutxent() ;
for (;;)
{
size_t linelen, idlen ;
struct utmpx *utx ;
int fd ;
errno = 0 ;
utx = getutxent() ;
if (!utx) break ;
if (utx->ut_type != USER_PROCESS) continue ;
linelen = strnlen(utx->ut_line, UT_LINESIZE) ;
idlen = strnlen(utx->ut_id, 4) ;
memcpy(tty + 5, utx->ut_line, linelen) ;
memcpy(tty + 5 + linelen, utx->ut_id, idlen) ;
tty[5 + linelen + idlen] = 0 ;
fd = open_append(tty) ;
if (fd == -1) continue ;
allwrite(fd, msg, n) ;
fd_close(fd) ;
}
if (errno) strerr_warnwu1sys("getutxent") ;
endutxent() ;
}
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