Commit | Line | Data |
---|---|---|
dfc1084e | 1 | /* lpf.c 4.10 83/04/29 |
8f85bfee RC |
2 | * filter which reads the output of nroff and converts lines |
3 | * with ^H's to overwritten lines. Thus this works like 'ul' | |
4 | * but is much better: it can handle more than 2 overwrites | |
5 | * and it is written with some style. | |
6 | * modified by kls to use register references instead of arrays | |
7 | * to try to gain a little speed. | |
3f5fc8d0 | 8 | */ |
3f5fc8d0 BJ |
9 | #include <stdio.h> |
10 | #include <signal.h> | |
11 | ||
8f85bfee RC |
12 | #define MAXWIDTH 132 |
13 | #define MAXREP 10 | |
3f5fc8d0 | 14 | |
8f85bfee RC |
15 | char buf[MAXREP][MAXWIDTH]; |
16 | int maxcol[MAXREP] = {-1}; | |
aaf17c3e RC |
17 | int lineno; |
18 | int width = 132; /* default line length */ | |
19 | int length = 66; /* page length */ | |
20 | int npages = 1; | |
21 | int literal; /* print control characters */ | |
22 | char *name; /* user's login name */ | |
23 | char *host; /* user's machine name */ | |
24 | char *acctfile; /* accounting information file */ | |
3f5fc8d0 | 25 | |
5af70e5e RC |
26 | onintr() |
27 | { | |
28 | signal(SIGTERM, SIG_IGN); | |
29 | exit(1); | |
30 | } | |
31 | ||
32 | main(argc, argv) | |
33 | int argc; | |
34 | char *argv[]; | |
3f5fc8d0 | 35 | { |
8f85bfee RC |
36 | register FILE *p = stdin, *o = stdout; |
37 | register int i, col; | |
38 | register char *cp; | |
39 | int done, linedone, maxrep; | |
40 | char ch, *limit; | |
41 | ||
5af70e5e RC |
42 | signal(SIGHUP, SIG_IGN); |
43 | signal(SIGINT, SIG_IGN); | |
44 | signal(SIGQUIT, SIG_IGN); | |
45 | signal(SIGTERM, onintr); | |
46 | ||
aaf17c3e RC |
47 | while (--argc) { |
48 | if (*(cp = *++argv) == '-') { | |
49 | switch (cp[1]) { | |
50 | case 'n': | |
51 | argc--; | |
52 | name = *++argv; | |
53 | break; | |
54 | ||
55 | case 'h': | |
56 | argc--; | |
57 | host = *++argv; | |
58 | break; | |
59 | ||
60 | case 'w': | |
61 | if ((i = atoi(&cp[2])) > 0 && i <= MAXWIDTH) | |
62 | width = i; | |
63 | break; | |
64 | ||
65 | case 'l': | |
66 | length = atoi(&cp[2]); | |
67 | break; | |
68 | ||
69 | case 'c': /* Print control chars */ | |
70 | literal++; | |
71 | break; | |
72 | } | |
73 | } else | |
74 | acctfile = cp; | |
75 | } | |
76 | ||
8f85bfee RC |
77 | for (cp = buf[0], limit = buf[MAXREP]; cp < limit; *cp++ = ' '); |
78 | done = 0; | |
79 | ||
80 | while (!done) { | |
81 | col = 0; | |
3e2fb2e5 | 82 | maxrep = -1; |
8f85bfee RC |
83 | linedone = 0; |
84 | while (!linedone) { | |
85 | switch (ch = getc(p)) { | |
86 | case EOF: | |
87 | linedone = done = 1; | |
88 | ch = '\n'; | |
89 | break; | |
90 | ||
8f85bfee | 91 | case '\f': |
aaf17c3e | 92 | lineno = length; |
8f85bfee | 93 | case '\n': |
3e2fb2e5 RC |
94 | if (maxrep < 0) |
95 | maxrep = 0; | |
8f85bfee RC |
96 | linedone = 1; |
97 | break; | |
98 | ||
99 | case '\b': | |
100 | if (col-- < 0) | |
101 | col = 0; | |
102 | break; | |
103 | ||
104 | case '\r': | |
105 | col = 0; | |
106 | break; | |
107 | ||
108 | case '\t': | |
109 | col = (col | 07) + 1; | |
110 | break; | |
111 | ||
09d5163a RC |
112 | case '\031': |
113 | /* | |
114 | * lpd needs to use a different filter to | |
115 | * print data so stop what we are doing and | |
116 | * wait for lpd to restart us. | |
117 | */ | |
118 | if ((ch = getchar()) == '\1') { | |
119 | fflush(stdout); | |
120 | kill(getpid(), SIGSTOP); | |
121 | break; | |
122 | } else { | |
123 | ungetc(ch, stdin); | |
124 | ch = '\031'; | |
125 | } | |
09d5163a | 126 | |
8f85bfee | 127 | default: |
aaf17c3e | 128 | if (col >= width || !literal && ch < ' ') |
8f85bfee RC |
129 | break; |
130 | cp = &buf[0][col]; | |
131 | for (i = 0; i < MAXREP; i++) { | |
132 | if (i > maxrep) | |
133 | maxrep = i; | |
134 | if (*cp == ' ') { | |
135 | *cp = ch; | |
136 | if (col > maxcol[i]) | |
137 | maxcol[i] = col; | |
138 | break; | |
139 | } | |
140 | cp += MAXWIDTH; | |
141 | } | |
142 | col++; | |
143 | break; | |
3f5fc8d0 BJ |
144 | } |
145 | } | |
3f5fc8d0 | 146 | |
8f85bfee RC |
147 | /* print out lines */ |
148 | for (i = 0; i <= maxrep; i++) { | |
149 | for (cp = buf[i], limit = cp+maxcol[i]; cp <= limit;) { | |
150 | putc(*cp, o); | |
151 | *cp++ = ' '; | |
152 | } | |
153 | if (i < maxrep) | |
154 | putc('\r', o); | |
155 | else | |
156 | putc(ch, o); | |
3e2fb2e5 RC |
157 | if (++lineno >= length) { |
158 | npages++; | |
159 | lineno = 0; | |
160 | } | |
8f85bfee | 161 | maxcol[i] = -1; |
fdaeefb7 | 162 | } |
3f5fc8d0 | 163 | } |
aaf17c3e RC |
164 | if (lineno) { /* be sure to end on a page boundary */ |
165 | putchar('\f'); | |
166 | npages++; | |
167 | } | |
168 | if (name && acctfile && access(acctfile, 02) >= 0 && | |
169 | freopen(acctfile, "a", stdout) != NULL) { | |
170 | printf("%7.2f\t%s:%s\n", (float)npages, host, name); | |
171 | } | |
172 | exit(0); | |
3f5fc8d0 | 173 | } |