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Annotation of 42BSD/usr.lib/lpr/startdaemon.c, revision 1.1.1.1

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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