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Annotation of 43BSD/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.  The Berkeley software License Agreement
        !             4:  * specifies the terms and conditions for redistribution.
        !             5:  */
        !             6: 
        !             7: #ifndef lint
        !             8: static char sccsid[] = "@(#)startdaemon.c      5.1 (Berkeley) 6/6/85";
        !             9: #endif not lint
        !            10: 
        !            11: /*
        !            12:  * Tell the printer daemon that there are new files in the spool directory.
        !            13:  */
        !            14: 
        !            15: #include <stdio.h>
        !            16: #include <sys/types.h>
        !            17: #include <sys/socket.h>
        !            18: #include <sys/un.h>
        !            19: #include "lp.local.h"
        !            20: 
        !            21: startdaemon(printer)
        !            22:        char *printer;
        !            23: {
        !            24:        struct sockaddr_un sun;
        !            25:        register int s, n;
        !            26:        char buf[BUFSIZ];
        !            27: 
        !            28:        s = socket(AF_UNIX, SOCK_STREAM, 0);
        !            29:        if (s < 0) {
        !            30:                perr("socket");
        !            31:                return(0);
        !            32:        }
        !            33:        sun.sun_family = AF_UNIX;
        !            34:        strcpy(sun.sun_path, SOCKETNAME);
        !            35:        if (connect(s, &sun, strlen(sun.sun_path) + 2) < 0) {
        !            36:                perr("connect");
        !            37:                (void) close(s);
        !            38:                return(0);
        !            39:        }
        !            40:        (void) sprintf(buf, "\1%s\n", printer);
        !            41:        n = strlen(buf);
        !            42:        if (write(s, buf, n) != n) {
        !            43:                perr("write");
        !            44:                (void) close(s);
        !            45:                return(0);
        !            46:        }
        !            47:        if (read(s, buf, 1) == 1) {
        !            48:                if (buf[0] == '\0') {           /* everything is OK */
        !            49:                        (void) close(s);
        !            50:                        return(1);
        !            51:                }
        !            52:                putchar(buf[0]);
        !            53:        }
        !            54:        while ((n = read(s, buf, sizeof(buf))) > 0)
        !            55:                fwrite(buf, 1, n, stdout);
        !            56:        (void) close(s);
        !            57:        return(0);
        !            58: }
        !            59: 
        !            60: static
        !            61: perr(msg)
        !            62:        char *msg;
        !            63: {
        !            64:        extern char *name;
        !            65:        extern int sys_nerr;
        !            66:        extern char *sys_errlist[];
        !            67:        extern int errno;
        !            68: 
        !            69:        printf("%s: %s: ", name, msg);
        !            70:        fputs(errno < sys_nerr ? sys_errlist[errno] : "Unknown error" , stdout);
        !            71:        putchar('\n');
        !            72: }

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