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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 | * | |
27c71911 | 8 | * %sccs.include.redist.c% |
bcf1365c DF |
9 | */ |
10 | ||
205a2d85 | 11 | #ifndef lint |
d6d4c082 | 12 | char copyright[] = |
0986a758 | 13 | "@(#) Copyright (c) 1989 The Regents of the University of California.\n\ |
d6d4c082 KB |
14 | All rights reserved.\n"; |
15 | #endif /* not lint */ | |
16 | ||
17 | #ifndef lint | |
27c71911 | 18 | static char sccsid[] = "@(#)cat.c 5.11 (Berkeley) %G%"; |
d6d4c082 | 19 | #endif /* not lint */ |
205a2d85 | 20 | |
0ae48d09 KB |
21 | #include <sys/param.h> |
22 | #include <sys/stat.h> | |
23 | #include <sys/file.h> | |
efa30d97 | 24 | #include <stdio.h> |
0986a758 | 25 | #include <ctype.h> |
efa30d97 | 26 | |
2b7b0bbf | 27 | extern int errno; |
f56eef62 KB |
28 | int bflag, eflag, nflag, sflag, tflag, vflag; |
29 | int rval; | |
0986a758 | 30 | char *filename; |
efa30d97 BJ |
31 | |
32 | main(argc, argv) | |
0986a758 KB |
33 | int argc; |
34 | char **argv; | |
efa30d97 | 35 | { |
2b7b0bbf | 36 | extern int optind; |
f56eef62 | 37 | int ch; |
0986a758 | 38 | char *strerror(); |
efa30d97 | 39 | |
fc16a647 | 40 | while ((ch = getopt(argc, argv, "benstuv")) != EOF) |
0986a758 | 41 | switch (ch) { |
f56eef62 KB |
42 | case 'b': |
43 | bflag = nflag = 1; /* -b implies -n */ | |
44 | break; | |
45 | case 'e': | |
46 | eflag = vflag = 1; /* -e implies -v */ | |
47 | break; | |
48 | case 'n': | |
49 | nflag = 1; | |
50 | break; | |
51 | case 's': | |
52 | sflag = 1; | |
53 | break; | |
54 | case 't': | |
55 | tflag = vflag = 1; /* -t implies -v */ | |
56 | break; | |
57 | case 'u': | |
58 | setbuf(stdout, (char *)NULL); | |
59 | break; | |
60 | case 'v': | |
61 | vflag = 1; | |
0986a758 KB |
62 | break; |
63 | case '?': | |
64 | (void)fprintf(stderr, | |
f56eef62 | 65 | "usage: cat [-benstuv] [-] [file ...]\n"); |
0986a758 | 66 | exit(1); |
72c98f6b | 67 | } |
fc16a647 | 68 | argv += optind; |
0986a758 | 69 | |
f56eef62 KB |
70 | if (bflag || eflag || nflag || sflag || tflag || vflag) |
71 | cook_args(argv); | |
72 | else | |
73 | raw_args(argv); | |
74 | exit(rval); | |
75 | } | |
76 | ||
77 | cook_args(argv) | |
78 | char **argv; | |
79 | { | |
80 | register FILE *fp; | |
81 | ||
82 | fp = stdin; | |
83 | filename = "-"; | |
84 | do { | |
85 | if (*argv) { | |
86 | if (!strcmp(*argv, "-")) | |
87 | fp = stdin; | |
88 | else if (!(fp = fopen(*argv, "r"))) { | |
89 | (void)fprintf(stderr, | |
90 | "cat: %s: %s\n", *argv, strerror(errno)); | |
91 | rval = 1; | |
92 | ++argv; | |
93 | continue; | |
94 | } | |
95 | filename = *argv++; | |
96 | } | |
97 | cook_buf(fp); | |
98 | if (fp != stdin) | |
99 | (void)fclose(fp); | |
100 | } while (*argv); | |
101 | } | |
102 | ||
103 | cook_buf(fp) | |
104 | register FILE *fp; | |
105 | { | |
106 | register int ch, gobble, line, prev; | |
107 | ||
108 | line = gobble = 0; | |
109 | for (prev = '\n'; (ch = getc(fp)) != EOF; prev = ch) { | |
110 | if (prev == '\n') { | |
111 | if (ch == '\n') { | |
112 | if (sflag) { | |
73e4609d | 113 | if (!gobble && putchar(ch) == EOF) |
7d9ace85 | 114 | break; |
f56eef62 | 115 | gobble = 1; |
7d9ace85 | 116 | continue; |
f56eef62 KB |
117 | } |
118 | if (nflag && !bflag) { | |
119 | (void)fprintf(stdout, "%6d\t", ++line); | |
120 | if (ferror(stdout)) | |
121 | break; | |
122 | } | |
7d9ace85 | 123 | } else if (nflag) { |
f56eef62 KB |
124 | (void)fprintf(stdout, "%6d\t", ++line); |
125 | if (ferror(stdout)) | |
126 | break; | |
127 | } | |
128 | } | |
7d9ace85 | 129 | gobble = 0; |
f56eef62 KB |
130 | if (ch == '\n') { |
131 | if (eflag) | |
73e4609d | 132 | if (putchar('$') == EOF) |
f56eef62 KB |
133 | break; |
134 | } else if (ch == '\t') { | |
135 | if (tflag) { | |
73e4609d | 136 | if (putchar('^') == EOF || putchar('I') == EOF) |
f56eef62 KB |
137 | break; |
138 | continue; | |
139 | } | |
140 | } else if (vflag) { | |
73e4609d KB |
141 | if (!isascii(ch)) { |
142 | if (putchar('M') == EOF || putchar('-') == EOF) | |
f56eef62 | 143 | break; |
73e4609d | 144 | ch = toascii(ch); |
f56eef62 KB |
145 | } |
146 | if (iscntrl(ch)) { | |
73e4609d KB |
147 | if (putchar('^') == EOF || |
148 | putchar(ch == '\177' ? '?' : | |
149 | ch | 0100) == EOF) | |
f56eef62 KB |
150 | break; |
151 | continue; | |
152 | } | |
153 | } | |
73e4609d | 154 | if (putchar(ch) == EOF) |
f56eef62 KB |
155 | break; |
156 | } | |
157 | if (ferror(fp)) { | |
158 | (void)fprintf(stderr, "cat: %s: read error\n", filename); | |
159 | rval = 1; | |
160 | } | |
161 | if (ferror(stdout)) { | |
162 | clearerr(stdout); | |
163 | (void)fprintf(stderr, "cat: stdout: write error\n"); | |
164 | rval = 1; | |
165 | } | |
166 | } | |
167 | ||
168 | raw_args(argv) | |
169 | char **argv; | |
170 | { | |
171 | register int fd; | |
172 | ||
0ae48d09 | 173 | fd = fileno(stdin); |
0986a758 KB |
174 | filename = "-"; |
175 | do { | |
176 | if (*argv) { | |
0ae48d09 KB |
177 | if (!strcmp(*argv, "-")) |
178 | fd = fileno(stdin); | |
179 | else if ((fd = open(*argv, O_RDONLY, 0)) < 0) { | |
180 | (void)fprintf(stderr, "cat: %s: %s\n", | |
181 | *argv, strerror(errno)); | |
182 | rval = 1; | |
0986a758 | 183 | ++argv; |
72c98f6b EC |
184 | continue; |
185 | } | |
0ae48d09 | 186 | filename = *argv++; |
efa30d97 | 187 | } |
f56eef62 | 188 | rval |= raw_cat(fd); |
0ae48d09 KB |
189 | if (fd != fileno(stdin)) |
190 | (void)close(fd); | |
0986a758 | 191 | } while (*argv); |
efa30d97 | 192 | } |
3c67f80d | 193 | |
f56eef62 | 194 | raw_cat(fd) |
0986a758 | 195 | register int fd; |
ef57e02f | 196 | { |
0986a758 | 197 | register int nr, nw, off; |
0ae48d09 KB |
198 | static int bsize; |
199 | static char *buf; | |
200 | struct stat sbuf; | |
201 | char *malloc(), *strerror(); | |
ef57e02f | 202 | |
0ae48d09 KB |
203 | if (!buf) { |
204 | if (fstat(fileno(stdout), &sbuf)) { | |
205 | (void)fprintf(stderr, "cat: %s: %s\n", filename, | |
206 | strerror(errno)); | |
207 | return(1); | |
208 | } | |
209 | bsize = MAX(sbuf.st_blksize, 1024); | |
210 | if (!(buf = malloc((u_int)bsize))) { | |
f56eef62 KB |
211 | (void)fprintf(stderr, "cat: %s: no memory.\n", |
212 | filename); | |
0ae48d09 KB |
213 | return(1); |
214 | } | |
215 | } | |
216 | while ((nr = read(fd, buf, bsize)) > 0) | |
0986a758 KB |
217 | for (off = 0; off < nr;) { |
218 | if ((nw = write(fileno(stdout), buf + off, nr)) < 0) { | |
219 | perror("cat: stdout"); | |
0ae48d09 | 220 | return(1); |
a58e01f9 | 221 | } |
0986a758 KB |
222 | off += nw; |
223 | } | |
224 | if (nr < 0) { | |
225 | (void)fprintf(stderr, "cat: %s: %s\n", filename, | |
226 | strerror(errno)); | |
0ae48d09 | 227 | return(1); |
a58e01f9 | 228 | } |
0ae48d09 | 229 | return(0); |
ef57e02f | 230 | } |