sys_errlist -> strerror(3)

[unix-history] / usr / src / usr.sbin / lpr / common_source / startdaemon.c

/*
* Copyright (c) 1983 Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms are permitted
* provided that the above copyright notice and this paragraph are
* duplicated in all such forms and that any documentation,
* advertising materials, and other materials related to such
* distribution and use acknowledge that the software was developed
* by the University of California, Berkeley.  The name of the
* University may not be used to endorse or promote products derived
* from this software without specific prior written permission.
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/

#ifndef lint
static char sccsid[] = "@(#)startdaemon.c       5.5 (Berkeley) %G%";
#endif /* not lint */

/*
* Tell the printer daemon that there are new files in the spool directory.
*/

#include <sys/types.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <stdio.h>
#include "lp.local.h"
#include "pathnames.h"

startdaemon(printer)
       char *printer;
{
       struct sockaddr_un sun;
       register int s, n;
       char buf[BUFSIZ];

       s = socket(AF_UNIX, SOCK_STREAM, 0);
       if (s < 0) {
               perr("socket");
               return(0);
       }
       sun.sun_family = AF_UNIX;
       strcpy(sun.sun_path, _PATH_SOCKETNAME);
       if (connect(s, &sun, strlen(sun.sun_path) + 2) < 0) {
               perr("connect");
               (void) close(s);
               return(0);
       }
       (void) sprintf(buf, "\1%s\n", printer);
       n = strlen(buf);
       if (write(s, buf, n) != n) {
               perr("write");
               (void) close(s);
               return(0);
       }
       if (read(s, buf, 1) == 1) {
               if (buf[0] == '\0') {           /* everything is OK */
                       (void) close(s);
                       return(1);
               }
               putchar(buf[0]);
       }
       while ((n = read(s, buf, sizeof(buf))) > 0)
               fwrite(buf, 1, n, stdout);
       (void) close(s);
       return(0);
}

static
perr(msg)
       char *msg;
{
       extern int errno;
       extern char *name;
       char *strerror();

       (void)printf("%s: %s: %s\n", name, msg, strerror(errno));
}