| 1 | #include <signal.h> |
| 2 | /* |
| 3 | * Line-printer daemon for Versatek |
| 4 | * |
| 5 | */ |
| 6 | |
| 7 | #define TIMEOUT 100 |
| 8 | #define DAEMUID 1 |
| 9 | |
| 10 | struct { |
| 11 | int ino; |
| 12 | char name[14]; |
| 13 | } dbuf; |
| 14 | |
| 15 | char line[128]; |
| 16 | char banbuf[64]; |
| 17 | int linel; |
| 18 | int dfb[259]; |
| 19 | char dfname[26] = "/usr/lpd/"; |
| 20 | int waittm = 60; |
| 21 | |
| 22 | main(argc, argv) |
| 23 | { |
| 24 | register char *p1, *p2; |
| 25 | register df; |
| 26 | |
| 27 | setuid(DAEMUID); |
| 28 | signal(SIGHUP, SIG_IGN); |
| 29 | signal(SIGINT, SIG_IGN); |
| 30 | signal(SIGQUIT, SIG_IGN); |
| 31 | /* |
| 32 | * Close all files, open root as 0, 1, 2 |
| 33 | * to assure standard environment |
| 34 | */ |
| 35 | for (df=0; df<=15; df++) |
| 36 | close(df); |
| 37 | open("/", 0); |
| 38 | dup(0); |
| 39 | dup(0); |
| 40 | if ((df=creat("/usr/lpd/lock", 0)) < 0) |
| 41 | exit(0); |
| 42 | close(df); |
| 43 | if (fork()) |
| 44 | exit(0); |
| 45 | again: |
| 46 | df = open("/usr/lpd", 0); |
| 47 | do { |
| 48 | if (read(df, &dbuf, sizeof dbuf) < sizeof dbuf) { |
| 49 | unlink("/usr/lpd/lock"); |
| 50 | exit(0); |
| 51 | } |
| 52 | } while (dbuf.ino==0 || dbuf.name[0]!='d' || dbuf.name[1]!='f'); |
| 53 | close(df); |
| 54 | p1 = dbuf.name; |
| 55 | p2 = &dfname[9]; |
| 56 | while (p1 < &dbuf.name[14]) |
| 57 | *p2++ = *p1++; |
| 58 | if (trysend(dfname) == 0) |
| 59 | goto again; |
| 60 | sleep(waittm); |
| 61 | goto again; |
| 62 | } |
| 63 | |
| 64 | trysend(file) |
| 65 | { |
| 66 | register char *p1, *p2; |
| 67 | register i; |
| 68 | extern int badexit(); |
| 69 | |
| 70 | if (fopen(file, dfb) < 0) |
| 71 | return(0); |
| 72 | banbuf[0] = 0; |
| 73 | while (getline()) switch (line[0]) { |
| 74 | case 'L': |
| 75 | p1 = line+1; |
| 76 | p2 = banbuf; |
| 77 | while (*p2++ = *p1++); |
| 78 | continue; |
| 79 | |
| 80 | case 'F': |
| 81 | if (send()) |
| 82 | return(1); |
| 83 | continue; |
| 84 | |
| 85 | case 'U': |
| 86 | continue; |
| 87 | |
| 88 | case 'M': |
| 89 | continue; |
| 90 | } |
| 91 | /* |
| 92 | * Second pass. |
| 93 | * Unlink files and send mail. |
| 94 | */ |
| 95 | lseek(dfb[0], 0L, 0); |
| 96 | dfb[1] = 0; |
| 97 | while (getline()) switch (line[0]) { |
| 98 | |
| 99 | default: |
| 100 | continue; |
| 101 | |
| 102 | case 'U': |
| 103 | unlink(&line[1]); |
| 104 | continue; |
| 105 | |
| 106 | case 'M': |
| 107 | sendmail(); |
| 108 | continue; |
| 109 | } |
| 110 | close(dfb[0]); |
| 111 | unlink(file); |
| 112 | } |
| 113 | |
| 114 | sendmail() |
| 115 | { |
| 116 | static int p[2]; |
| 117 | register i; |
| 118 | int stat; |
| 119 | |
| 120 | pipe(p); |
| 121 | if (fork()==0) { |
| 122 | alarm(0); |
| 123 | close(0); |
| 124 | dup(p[0]); |
| 125 | for (i=3; i<=15; i++) |
| 126 | close(i); |
| 127 | execl("/bin/mail", "mail", &line[1], 0); |
| 128 | exit(0); |
| 129 | } |
| 130 | close(1); |
| 131 | dup(p[1]); |
| 132 | printf("Your printer job is done\n"); |
| 133 | close(1); |
| 134 | close(p[0]); |
| 135 | close(p[1]); |
| 136 | open("/", 0); |
| 137 | wait(&stat); |
| 138 | } |
| 139 | |
| 140 | getline() |
| 141 | { |
| 142 | register char *lp; |
| 143 | register c; |
| 144 | |
| 145 | lp = line; |
| 146 | linel = 0; |
| 147 | while ((c = getc(dfb)) != '\n') { |
| 148 | if (c<0) |
| 149 | return(0); |
| 150 | if (c=='\t') { |
| 151 | do { |
| 152 | *lp++ = ' '; |
| 153 | linel++; |
| 154 | } while ((linel & 07) != 0); |
| 155 | continue; |
| 156 | } |
| 157 | *lp++ = c; |
| 158 | linel++; |
| 159 | } |
| 160 | *lp++ = 0; |
| 161 | return(1); |
| 162 | } |
| 163 | |
| 164 | send() |
| 165 | { |
| 166 | int p; |
| 167 | |
| 168 | if (p = fork()) { |
| 169 | if (p == -1) |
| 170 | return(1); |
| 171 | wait(&p); |
| 172 | return(p); |
| 173 | } |
| 174 | if (banbuf[0]) { |
| 175 | execl("/usr/bin/vpr", "vpr", "-b", banbuf, line+1, 0); |
| 176 | return(1); |
| 177 | } |
| 178 | execl("/usr/bin/vpr", "vpr", line, 0); |
| 179 | return(1); |
| 180 | } |