1 #ifndef lint 2 static char sccsid[] = "@(#)common.c 4.8 (Berkeley) 07/17/83"; 3 #endif 4 5 /* 6 * Routines and data common to all the line printer functions. 7 */ 8 9 #include "lp.h" 10 11 int DU; /* daeomon user-id */ 12 int MX; /* maximum number of blocks to copy */ 13 int MC; /* maximum number of copies allowed */ 14 char *LP; /* line printer device name */ 15 char *RM; /* remote machine name */ 16 char *RP; /* remote printer name */ 17 char *LO; /* lock file name */ 18 char *ST; /* status file name */ 19 char *SD; /* spool directory */ 20 char *AF; /* accounting file */ 21 char *LF; /* log file for error messages */ 22 char *OF; /* name of output filter (created once) */ 23 char *IF; /* name of input filter (created per job) */ 24 char *RF; /* name of fortran text filter (per job) */ 25 char *TF; /* name of troff filter (per job) */ 26 char *NF; /* name of ditroff filter (per job) */ 27 char *DF; /* name of tex filter (per job) */ 28 char *GF; /* name of graph(1G) filter (per job) */ 29 char *VF; /* name of vplot filter (per job) */ 30 char *CF; /* name of cifplot filter (per job) */ 31 char *PF; /* name of vrast filter (per job) */ 32 char *FF; /* form feed string */ 33 char *TR; /* trailer string to be output when Q empties */ 34 short SC; /* suppress multiple copies */ 35 short SF; /* suppress FF on each print job */ 36 short SH; /* suppress header page */ 37 short SB; /* short banner instead of normal header */ 38 short RW; /* open LP for reading and writing */ 39 short PW; /* page width */ 40 short PL; /* page length */ 41 short PX; /* page width in pixels */ 42 short PY; /* page length in pixels */ 43 short BR; /* baud rate if lp is a tty */ 44 int FC; /* flags to clear if lp is a tty */ 45 int FS; /* flags to set if lp is a tty */ 46 int XC; /* flags to clear for local mode */ 47 int XS; /* flags to set for local mode */ 48 short RS; /* restricted to those with local accounts */ 49 50 char line[BUFSIZ]; 51 char pbuf[BUFSIZ/2]; /* buffer for printcap strings */ 52 char *bp = pbuf; /* pointer into pbuf for pgetent() */ 53 char *name; /* program name */ 54 char *printer; /* printer name */ 55 char host[32]; /* host machine name */ 56 char *from = host; /* client's machine name */ 57 58 /* 59 * Create a connection to the remote printer server. 60 * Most of this code comes from rcmd.c. 61 */ 62 getport(rhost) 63 char *rhost; 64 { 65 struct hostent *hp; 66 struct servent *sp; 67 struct sockaddr_in sin; 68 int s, timo = 1, lport = IPPORT_RESERVED - 1; 69 int err; 70 71 /* 72 * Get the host address and port number to connect to. 73 */ 74 if (rhost == NULL) 75 fatal("no remote host to connect to"); 76 hp = gethostbyname(rhost); 77 if (hp == NULL) 78 fatal("unknown host %s", rhost); 79 sp = getservbyname("printer", "tcp"); 80 if (sp == NULL) 81 fatal("printer/tcp: unknown service"); 82 bzero((char *)&sin, sizeof(sin)); 83 bcopy(hp->h_addr, (caddr_t)&sin.sin_addr, hp->h_length); 84 sin.sin_family = hp->h_addrtype; 85 sin.sin_port = sp->s_port; 86 87 /* 88 * Try connecting to the server. 89 */ 90 retry: 91 s = rresvport(&lport); 92 if (s < 0) 93 return(-1); 94 if (connect(s, (caddr_t)&sin, sizeof(sin), 0) < 0) { 95 err = errno; 96 (void) close(s); 97 errno = err; 98 if (errno == EADDRINUSE) { 99 lport--; 100 goto retry; 101 } 102 if (errno == ECONNREFUSED && timo <= 16) { 103 sleep(timo); 104 timo *= 2; 105 goto retry; 106 } 107 return(-1); 108 } 109 return(s); 110 } 111 112 rresvport(alport) 113 int *alport; 114 { 115 struct sockaddr_in sin; 116 int s; 117 118 sin.sin_family = AF_INET; 119 sin.sin_addr.s_addr = 0; 120 s = socket(AF_INET, SOCK_STREAM, 0); 121 if (s < 0) 122 return(-1); 123 for (; *alport > IPPORT_RESERVED/2; (*alport)--) { 124 sin.sin_port = htons((u_short) *alport); 125 if (bind(s, (caddr_t)&sin, sizeof(sin), 0) >= 0) 126 return(s); 127 if (errno != EADDRINUSE && errno != EADDRNOTAVAIL) 128 break; 129 } 130 (void) close(s); 131 return(-1); 132 } 133 134 /* 135 * Getline reads a line from the control file cfp, removes tabs, converts 136 * new-line to null and leaves it in line. 137 * Returns 0 at EOF or the number of characters read. 138 */ 139 getline(cfp) 140 FILE *cfp; 141 { 142 register int linel = 0; 143 register char *lp = line; 144 register c; 145 146 while ((c = getc(cfp)) != '\n') { 147 if (c == EOF) 148 return(0); 149 if (c == '\t') { 150 do { 151 *lp++ = ' '; 152 linel++; 153 } while ((linel & 07) != 0); 154 continue; 155 } 156 *lp++ = c; 157 linel++; 158 } 159 *lp++ = '\0'; 160 return(linel); 161 } 162 163 /* 164 * Scan the current directory and make a list of daemon files sorted by 165 * creation time. 166 * Return the number of entries and a pointer to the list. 167 */ 168 getq(namelist) 169 struct queue *(*namelist[]); 170 { 171 register struct direct *d; 172 register struct queue *q, **queue; 173 register int nitems; 174 struct stat stbuf; 175 int arraysz, compar(); 176 DIR *dirp; 177 178 if ((dirp = opendir(SD)) == NULL) 179 return(-1); 180 if (fstat(dirp->dd_fd, &stbuf) < 0) 181 goto errdone; 182 183 /* 184 * Estimate the array size by taking the size of the directory file 185 * and dividing it by a multiple of the minimum size entry. 186 */ 187 arraysz = (stbuf.st_size / 24); 188 queue = (struct queue **)malloc(arraysz * sizeof(struct queue *)); 189 if (queue == NULL) 190 goto errdone; 191 192 nitems = 0; 193 while ((d = readdir(dirp)) != NULL) { 194 if (d->d_name[0] != 'c' || d->d_name[1] != 'f') 195 continue; /* daemon control files only */ 196 if (stat(d->d_name, &stbuf) < 0) 197 continue; /* Doesn't exist */ 198 q = (struct queue *)malloc(sizeof(time_t)+strlen(d->d_name)+1); 199 if (q == NULL) 200 goto errdone; 201 q->q_time = stbuf.st_mtime; 202 strcpy(q->q_name, d->d_name); 203 /* 204 * Check to make sure the array has space left and 205 * realloc the maximum size. 206 */ 207 if (++nitems > arraysz) { 208 queue = (struct queue **)realloc((char *)queue, 209 (stbuf.st_size/12) * sizeof(struct queue *)); 210 if (queue == NULL) 211 goto errdone; 212 } 213 queue[nitems-1] = q; 214 } 215 closedir(dirp); 216 if (nitems) 217 qsort(queue, nitems, sizeof(struct queue *), compar); 218 *namelist = queue; 219 return(nitems); 220 221 errdone: 222 closedir(dirp); 223 return(-1); 224 } 225 226 /* 227 * Compare modification times. 228 */ 229 static 230 compar(p1, p2) 231 register struct queue **p1, **p2; 232 { 233 if ((*p1)->q_time < (*p2)->q_time) 234 return(-1); 235 if ((*p1)->q_time > (*p2)->q_time) 236 return(1); 237 return(0); 238 } 239 240 /*VARARGS1*/ 241 fatal(msg, a1, a2, a3) 242 char *msg; 243 { 244 if (from != host) 245 printf("%s: ", host); 246 printf("%s: ", name); 247 if (printer) 248 printf("%s: ", printer); 249 printf(msg, a1, a2, a3); 250 putchar('\n'); 251 exit(1); 252 } 253