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bcf1365c | 1 | /* |
0986a758 KB |
2 | * Copyright (c) 1989 The Regents of the University of California. |
3 | * All rights reserved. | |
4 | * | |
5 | * This code is derived from software contributed to Berkeley by | |
6 | * Kevin Fall. | |
7 | * | |
8 | * Redistribution and use in source and binary forms are permitted | |
9 | * provided that the above copyright notice and this paragraph are | |
10 | * duplicated in all such forms and that any documentation, | |
11 | * advertising materials, and other materials related to such | |
12 | * distribution and use acknowledge that the software was developed | |
13 | * by the University of California, Berkeley. The name of the | |
14 | * University may not be used to endorse or promote products derived | |
15 | * from this software without specific prior written permission. | |
16 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR | |
17 | * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED | |
18 | * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. | |
bcf1365c DF |
19 | */ |
20 | ||
205a2d85 | 21 | #ifndef lint |
d6d4c082 | 22 | char copyright[] = |
0986a758 | 23 | "@(#) Copyright (c) 1989 The Regents of the University of California.\n\ |
d6d4c082 KB |
24 | All rights reserved.\n"; |
25 | #endif /* not lint */ | |
26 | ||
27 | #ifndef lint | |
7d9ace85 | 28 | static char sccsid[] = "@(#)cat.c 5.7 (Berkeley) %G%"; |
d6d4c082 | 29 | #endif /* not lint */ |
205a2d85 | 30 | |
0ae48d09 KB |
31 | #include <sys/param.h> |
32 | #include <sys/stat.h> | |
33 | #include <sys/file.h> | |
efa30d97 | 34 | #include <stdio.h> |
0986a758 | 35 | #include <ctype.h> |
efa30d97 | 36 | |
f56eef62 KB |
37 | int bflag, eflag, nflag, sflag, tflag, vflag; |
38 | int rval; | |
0986a758 | 39 | char *filename; |
efa30d97 BJ |
40 | |
41 | main(argc, argv) | |
0986a758 KB |
42 | int argc; |
43 | char **argv; | |
efa30d97 | 44 | { |
0986a758 | 45 | extern int errno, optind; |
f56eef62 | 46 | int ch; |
0986a758 | 47 | char *strerror(); |
efa30d97 | 48 | |
f56eef62 | 49 | while ((ch = getopt(argc, argv, "-benstuv")) != EOF) |
0986a758 KB |
50 | switch (ch) { |
51 | case '-': | |
52 | --optind; | |
53 | goto done; | |
f56eef62 KB |
54 | case 'b': |
55 | bflag = nflag = 1; /* -b implies -n */ | |
56 | break; | |
57 | case 'e': | |
58 | eflag = vflag = 1; /* -e implies -v */ | |
59 | break; | |
60 | case 'n': | |
61 | nflag = 1; | |
62 | break; | |
63 | case 's': | |
64 | sflag = 1; | |
65 | break; | |
66 | case 't': | |
67 | tflag = vflag = 1; /* -t implies -v */ | |
68 | break; | |
69 | case 'u': | |
70 | setbuf(stdout, (char *)NULL); | |
71 | break; | |
72 | case 'v': | |
73 | vflag = 1; | |
0986a758 KB |
74 | break; |
75 | case '?': | |
76 | (void)fprintf(stderr, | |
f56eef62 | 77 | "usage: cat [-benstuv] [-] [file ...]\n"); |
0986a758 | 78 | exit(1); |
72c98f6b | 79 | } |
0986a758 KB |
80 | done: argv += optind; |
81 | ||
f56eef62 KB |
82 | if (bflag || eflag || nflag || sflag || tflag || vflag) |
83 | cook_args(argv); | |
84 | else | |
85 | raw_args(argv); | |
86 | exit(rval); | |
87 | } | |
88 | ||
89 | cook_args(argv) | |
90 | char **argv; | |
91 | { | |
92 | register FILE *fp; | |
93 | ||
94 | fp = stdin; | |
95 | filename = "-"; | |
96 | do { | |
97 | if (*argv) { | |
98 | if (!strcmp(*argv, "-")) | |
99 | fp = stdin; | |
100 | else if (!(fp = fopen(*argv, "r"))) { | |
101 | (void)fprintf(stderr, | |
102 | "cat: %s: %s\n", *argv, strerror(errno)); | |
103 | rval = 1; | |
104 | ++argv; | |
105 | continue; | |
106 | } | |
107 | filename = *argv++; | |
108 | } | |
109 | cook_buf(fp); | |
110 | if (fp != stdin) | |
111 | (void)fclose(fp); | |
112 | } while (*argv); | |
113 | } | |
114 | ||
115 | cook_buf(fp) | |
116 | register FILE *fp; | |
117 | { | |
118 | register int ch, gobble, line, prev; | |
119 | ||
120 | line = gobble = 0; | |
121 | for (prev = '\n'; (ch = getc(fp)) != EOF; prev = ch) { | |
122 | if (prev == '\n') { | |
123 | if (ch == '\n') { | |
124 | if (sflag) { | |
7d9ace85 KB |
125 | if (!gobble && putc(ch, stdout) == EOF) |
126 | break; | |
f56eef62 | 127 | gobble = 1; |
7d9ace85 | 128 | continue; |
f56eef62 KB |
129 | } |
130 | if (nflag && !bflag) { | |
131 | (void)fprintf(stdout, "%6d\t", ++line); | |
132 | if (ferror(stdout)) | |
133 | break; | |
134 | } | |
7d9ace85 | 135 | } else if (nflag) { |
f56eef62 KB |
136 | (void)fprintf(stdout, "%6d\t", ++line); |
137 | if (ferror(stdout)) | |
138 | break; | |
139 | } | |
140 | } | |
7d9ace85 | 141 | gobble = 0; |
f56eef62 KB |
142 | if (ch == '\n') { |
143 | if (eflag) | |
144 | if (putc('$', stdout) == EOF) | |
145 | break; | |
146 | } else if (ch == '\t') { | |
147 | if (tflag) { | |
148 | if (putc('^', stdout) == EOF || | |
149 | putc('I', stdout) == EOF) | |
150 | break; | |
151 | continue; | |
152 | } | |
153 | } else if (vflag) { | |
154 | if (ch > 0177) { | |
155 | if (putc('M', stdout) == EOF || | |
156 | putc('-', stdout) == EOF) | |
157 | break; | |
158 | ch &= 0177; | |
159 | } | |
160 | if (iscntrl(ch)) { | |
161 | if (putc('^', stdout) == EOF || | |
162 | putc(ch == '\177' ? '?' : | |
163 | ch | 0100, stdout) == EOF) | |
164 | break; | |
165 | continue; | |
166 | } | |
167 | } | |
168 | if (putc(ch, stdout) == EOF) | |
169 | break; | |
170 | } | |
171 | if (ferror(fp)) { | |
172 | (void)fprintf(stderr, "cat: %s: read error\n", filename); | |
173 | rval = 1; | |
174 | } | |
175 | if (ferror(stdout)) { | |
176 | clearerr(stdout); | |
177 | (void)fprintf(stderr, "cat: stdout: write error\n"); | |
178 | rval = 1; | |
179 | } | |
180 | } | |
181 | ||
182 | raw_args(argv) | |
183 | char **argv; | |
184 | { | |
185 | register int fd; | |
186 | ||
0ae48d09 | 187 | fd = fileno(stdin); |
0986a758 KB |
188 | filename = "-"; |
189 | do { | |
190 | if (*argv) { | |
0ae48d09 KB |
191 | if (!strcmp(*argv, "-")) |
192 | fd = fileno(stdin); | |
193 | else if ((fd = open(*argv, O_RDONLY, 0)) < 0) { | |
194 | (void)fprintf(stderr, "cat: %s: %s\n", | |
195 | *argv, strerror(errno)); | |
196 | rval = 1; | |
0986a758 | 197 | ++argv; |
72c98f6b EC |
198 | continue; |
199 | } | |
0ae48d09 | 200 | filename = *argv++; |
efa30d97 | 201 | } |
f56eef62 | 202 | rval |= raw_cat(fd); |
0ae48d09 KB |
203 | if (fd != fileno(stdin)) |
204 | (void)close(fd); | |
0986a758 | 205 | } while (*argv); |
efa30d97 | 206 | } |
3c67f80d | 207 | |
f56eef62 | 208 | raw_cat(fd) |
0986a758 | 209 | register int fd; |
ef57e02f | 210 | { |
0986a758 | 211 | extern int errno; |
0986a758 | 212 | register int nr, nw, off; |
0ae48d09 KB |
213 | static int bsize; |
214 | static char *buf; | |
215 | struct stat sbuf; | |
216 | char *malloc(), *strerror(); | |
ef57e02f | 217 | |
0ae48d09 KB |
218 | if (!buf) { |
219 | if (fstat(fileno(stdout), &sbuf)) { | |
220 | (void)fprintf(stderr, "cat: %s: %s\n", filename, | |
221 | strerror(errno)); | |
222 | return(1); | |
223 | } | |
224 | bsize = MAX(sbuf.st_blksize, 1024); | |
225 | if (!(buf = malloc((u_int)bsize))) { | |
f56eef62 KB |
226 | (void)fprintf(stderr, "cat: %s: no memory.\n", |
227 | filename); | |
0ae48d09 KB |
228 | return(1); |
229 | } | |
230 | } | |
231 | while ((nr = read(fd, buf, bsize)) > 0) | |
0986a758 KB |
232 | for (off = 0; off < nr;) { |
233 | if ((nw = write(fileno(stdout), buf + off, nr)) < 0) { | |
234 | perror("cat: stdout"); | |
0ae48d09 | 235 | return(1); |
a58e01f9 | 236 | } |
0986a758 KB |
237 | off += nw; |
238 | } | |
239 | if (nr < 0) { | |
240 | (void)fprintf(stderr, "cat: %s: %s\n", filename, | |
241 | strerror(errno)); | |
0ae48d09 | 242 | return(1); |
a58e01f9 | 243 | } |
0ae48d09 | 244 | return(0); |
ef57e02f | 245 | } |