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Annotation of 42BSD/usr.lib/lpr/startdaemon.c, revision 1.1

1.1     ! root        1: #ifndef lint
        !             2: static char sccsid[] = "@(#)startdaemon.c      4.7 (Berkeley) 7/17/83";
        !             3: #endif
        !             4: 
        !             5: /*
        !             6:  * Tell the printer daemon that there are new files in the spool directory.
        !             7:  */
        !             8: 
        !             9: #include <stdio.h>
        !            10: #include <sys/types.h>
        !            11: #include <sys/socket.h>
        !            12: #include <sys/un.h>
        !            13: #include "lp.local.h"
        !            14: 
        !            15: startdaemon(printer)
        !            16:        char *printer;
        !            17: {
        !            18:        struct sockaddr_un sun;
        !            19:        register int s, n;
        !            20:        char buf[BUFSIZ];
        !            21: 
        !            22:        s = socket(AF_UNIX, SOCK_STREAM, 0);
        !            23:        if (s < 0) {
        !            24:                perr("socket");
        !            25:                return(0);
        !            26:        }
        !            27:        sun.sun_family = AF_UNIX;
        !            28:        strcpy(sun.sun_path, SOCKETNAME);
        !            29:        if (connect(s, &sun, strlen(sun.sun_path) + 2) < 0) {
        !            30:                perr("connect");
        !            31:                (void) close(s);
        !            32:                return(0);
        !            33:        }
        !            34:        (void) sprintf(buf, "\1%s\n", printer);
        !            35:        n = strlen(buf);
        !            36:        if (write(s, buf, n) != n) {
        !            37:                perr("write");
        !            38:                (void) close(s);
        !            39:                return(0);
        !            40:        }
        !            41:        if (read(s, buf, 1) == 1) {
        !            42:                if (buf[0] == '\0') {           /* everything is OK */
        !            43:                        (void) close(s);
        !            44:                        return(1);
        !            45:                }
        !            46:                putchar(buf[0]);
        !            47:        }
        !            48:        while ((n = read(s, buf, sizeof(buf))) > 0)
        !            49:                fwrite(buf, 1, n, stdout);
        !            50:        (void) close(s);
        !            51:        return(0);
        !            52: }
        !            53: 
        !            54: static
        !            55: perr(msg)
        !            56:        char *msg;
        !            57: {
        !            58:        extern char *name;
        !            59:        extern int sys_nerr;
        !            60:        extern char *sys_errlist[];
        !            61:        extern int errno;
        !            62: 
        !            63:        printf("%s: %s: ", name, msg);
        !            64:        fputs(errno < sys_nerr ? sys_errlist[errno] : "Unknown error" , stdout);
        !            65:        putchar('\n');
        !            66: }

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