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Annotation of 43BSDTahoe/usr.lib/lpr/startdaemon.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1983 Regents of the University of California.
        !             3:  * All rights reserved.
        !             4:  *
        !             5:  * Redistribution and use in source and binary forms are permitted
        !             6:  * provided that the above copyright notice and this paragraph are
        !             7:  * duplicated in all such forms and that any documentation,
        !             8:  * advertising materials, and other materials related to such
        !             9:  * distribution and use acknowledge that the software was developed
        !            10:  * by the University of California, Berkeley.  The name of the
        !            11:  * University may not be used to endorse or promote products derived
        !            12:  * from this software without specific prior written permission.
        !            13:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
        !            14:  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
        !            15:  * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
        !            16:  */
        !            17: 
        !            18: #ifndef lint
        !            19: static char sccsid[] = "@(#)startdaemon.c      5.3 (Berkeley) 6/30/88";
        !            20: #endif /* not lint */
        !            21: 
        !            22: /*
        !            23:  * Tell the printer daemon that there are new files in the spool directory.
        !            24:  */
        !            25: 
        !            26: #include <stdio.h>
        !            27: #include <sys/types.h>
        !            28: #include <sys/socket.h>
        !            29: #include <sys/un.h>
        !            30: #include "lp.local.h"
        !            31: 
        !            32: startdaemon(printer)
        !            33:        char *printer;
        !            34: {
        !            35:        struct sockaddr_un sun;
        !            36:        register int s, n;
        !            37:        char buf[BUFSIZ];
        !            38: 
        !            39:        s = socket(AF_UNIX, SOCK_STREAM, 0);
        !            40:        if (s < 0) {
        !            41:                perr("socket");
        !            42:                return(0);
        !            43:        }
        !            44:        sun.sun_family = AF_UNIX;
        !            45:        strcpy(sun.sun_path, SOCKETNAME);
        !            46:        if (connect(s, &sun, strlen(sun.sun_path) + 2) < 0) {
        !            47:                perr("connect");
        !            48:                (void) close(s);
        !            49:                return(0);
        !            50:        }
        !            51:        (void) sprintf(buf, "\1%s\n", printer);
        !            52:        n = strlen(buf);
        !            53:        if (write(s, buf, n) != n) {
        !            54:                perr("write");
        !            55:                (void) close(s);
        !            56:                return(0);
        !            57:        }
        !            58:        if (read(s, buf, 1) == 1) {
        !            59:                if (buf[0] == '\0') {           /* everything is OK */
        !            60:                        (void) close(s);
        !            61:                        return(1);
        !            62:                }
        !            63:                putchar(buf[0]);
        !            64:        }
        !            65:        while ((n = read(s, buf, sizeof(buf))) > 0)
        !            66:                fwrite(buf, 1, n, stdout);
        !            67:        (void) close(s);
        !            68:        return(0);
        !            69: }
        !            70: 
        !            71: static
        !            72: perr(msg)
        !            73:        char *msg;
        !            74: {
        !            75:        extern char *name;
        !            76:        extern int sys_nerr;
        !            77:        extern char *sys_errlist[];
        !            78:        extern int errno;
        !            79: 
        !            80:        printf("%s: %s: ", name, msg);
        !            81:        fputs(errno < sys_nerr ? sys_errlist[errno] : "Unknown error" , stdout);
        !            82:        putchar('\n');
        !            83: }

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