Commit | Line | Data |
---|---|---|
205a2d85 | 1 | #ifndef lint |
a58e01f9 | 2 | static char *sccsid = "@(#)cat.c 4.9 (Berkeley) %G%"; |
205a2d85 SL |
3 | #endif |
4 | ||
efa30d97 BJ |
5 | /* |
6 | * Concatenate files. | |
7 | */ | |
8 | ||
9 | #include <stdio.h> | |
10 | #include <sys/types.h> | |
11 | #include <sys/stat.h> | |
12 | ||
a58e01f9 | 13 | /* #define OPTSIZE BUFSIZ /* define this only if not 4.2 BSD or beyond */ |
ef57e02f RC |
14 | |
15 | int bflg, eflg, nflg, sflg, tflg, uflg, vflg; | |
16 | int spaced, col, lno, inline, ibsize, obsize; | |
efa30d97 BJ |
17 | |
18 | main(argc, argv) | |
19 | char **argv; | |
20 | { | |
21 | int fflg = 0; | |
22 | register FILE *fi; | |
23 | register c; | |
24 | int dev, ino = -1; | |
25 | struct stat statb; | |
ef57e02f | 26 | int retval = 0; |
efa30d97 | 27 | |
3c67f80d | 28 | lno = 1; |
efa30d97 BJ |
29 | for( ; argc>1 && argv[1][0]=='-'; argc--,argv++) { |
30 | switch(argv[1][1]) { | |
31 | case 0: | |
32 | break; | |
33 | case 'u': | |
34 | setbuf(stdout, (char *)NULL); | |
ef57e02f | 35 | uflg++; |
efa30d97 | 36 | continue; |
3c67f80d BJ |
37 | case 'n': |
38 | nflg++; | |
39 | continue; | |
40 | case 'b': | |
41 | bflg++; | |
42 | nflg++; | |
43 | continue; | |
44 | case 'v': | |
45 | vflg++; | |
46 | continue; | |
47 | case 's': | |
48 | sflg++; | |
49 | continue; | |
50 | case 'e': | |
51 | eflg++; | |
52 | vflg++; | |
53 | continue; | |
54 | case 't': | |
55 | tflg++; | |
56 | vflg++; | |
57 | continue; | |
efa30d97 BJ |
58 | } |
59 | break; | |
60 | } | |
72c98f6b EC |
61 | if (fstat(fileno(stdout), &statb) == 0) { |
62 | statb.st_mode &= S_IFMT; | |
63 | if (statb.st_mode!=S_IFCHR && statb.st_mode!=S_IFBLK) { | |
64 | dev = statb.st_dev; | |
65 | ino = statb.st_ino; | |
66 | } | |
a58e01f9 | 67 | #ifndef OPTSIZE |
ef57e02f | 68 | obsize = statb.st_blksize; |
a58e01f9 | 69 | #endif |
efa30d97 | 70 | } |
ef57e02f RC |
71 | else |
72 | obsize = 0; | |
efa30d97 BJ |
73 | if (argc < 2) { |
74 | argc = 2; | |
75 | fflg++; | |
76 | } | |
77 | while (--argc > 0) { | |
78 | if (fflg || (*++argv)[0]=='-' && (*argv)[1]=='\0') | |
79 | fi = stdin; | |
80 | else { | |
81 | if ((fi = fopen(*argv, "r")) == NULL) { | |
45fb66b3 | 82 | perror(*argv); |
ef57e02f | 83 | retval = 1; |
efa30d97 BJ |
84 | continue; |
85 | } | |
86 | } | |
72c98f6b | 87 | if (fstat(fileno(fi), &statb) == 0) { |
ec0bdac7 BJ |
88 | if ((statb.st_mode & S_IFMT) == S_IFREG && |
89 | statb.st_dev==dev && statb.st_ino==ino) { | |
72c98f6b EC |
90 | fprintf(stderr, "cat: input %s is output\n", |
91 | fflg?"-": *argv); | |
92 | fclose(fi); | |
ef57e02f | 93 | retval = 1; |
72c98f6b EC |
94 | continue; |
95 | } | |
a58e01f9 | 96 | #ifndef OPTSIZE |
ef57e02f | 97 | ibsize = statb.st_blksize; |
a58e01f9 | 98 | #endif |
efa30d97 | 99 | } |
ef57e02f RC |
100 | else |
101 | ibsize = 0; | |
3c67f80d BJ |
102 | if (nflg||sflg||vflg) |
103 | copyopt(fi); | |
ef57e02f | 104 | else if (uflg) { |
3c67f80d BJ |
105 | while ((c = getc(fi)) != EOF) |
106 | putchar(c); | |
ef57e02f | 107 | } else |
a58e01f9 | 108 | retval |= fastcat(fileno(fi)); /* no flags specified */ |
efa30d97 BJ |
109 | if (fi!=stdin) |
110 | fclose(fi); | |
ef57e02f RC |
111 | if (ferror(stdout)) { |
112 | fprintf(stderr, "cat: output write error\n"); | |
113 | retval = 1; | |
114 | break; | |
115 | } | |
efa30d97 | 116 | } |
ef57e02f | 117 | exit(retval); |
efa30d97 | 118 | } |
3c67f80d BJ |
119 | |
120 | copyopt(f) | |
121 | register FILE *f; | |
122 | { | |
123 | register int c; | |
124 | ||
125 | top: | |
126 | c = getc(f); | |
127 | if (c == EOF) | |
128 | return; | |
129 | if (c == '\n') { | |
130 | if (inline == 0) { | |
131 | if (sflg && spaced) | |
132 | goto top; | |
133 | spaced = 1; | |
134 | } | |
135 | if (nflg && bflg==0 && inline == 0) | |
136 | printf("%6d\t", lno++); | |
137 | if (eflg) | |
138 | putchar('$'); | |
139 | putchar('\n'); | |
140 | inline = 0; | |
141 | goto top; | |
142 | } | |
143 | if (nflg && inline == 0) | |
144 | printf("%6d\t", lno++); | |
145 | inline = 1; | |
146 | if (vflg) { | |
147 | if (tflg==0 && c == '\t') | |
148 | putchar(c); | |
149 | else { | |
150 | if (c > 0177) { | |
151 | printf("M-"); | |
152 | c &= 0177; | |
153 | } | |
154 | if (c < ' ') | |
155 | printf("^%c", c+'@'); | |
156 | else if (c == 0177) | |
157 | printf("^?"); | |
158 | else | |
159 | putchar(c); | |
160 | } | |
161 | } else | |
162 | putchar(c); | |
163 | spaced = 0; | |
164 | goto top; | |
165 | } | |
ef57e02f RC |
166 | |
167 | fastcat(fd) | |
168 | register int fd; | |
169 | { | |
170 | register int buffsize, n, nwritten, offset; | |
171 | register char *buff; | |
172 | struct stat statbuff; | |
173 | char *malloc(); | |
174 | ||
175 | #ifndef OPTSIZE | |
a58e01f9 MK |
176 | if (obsize) |
177 | buffsize = obsize; /* common case, use output blksize */ | |
178 | else if (ibsize) | |
ef57e02f RC |
179 | buffsize = ibsize; |
180 | else | |
a58e01f9 | 181 | buffsize = BUFSIZ; |
ef57e02f RC |
182 | #else |
183 | buffsize = OPTSIZE; | |
184 | #endif | |
185 | ||
a58e01f9 | 186 | if ((buff = malloc(buffsize)) == NULL) { |
ef57e02f | 187 | perror("cat: no memory"); |
a58e01f9 MK |
188 | return (1); |
189 | } | |
ef57e02f RC |
190 | |
191 | /* | |
192 | * Note that on some systems (V7), very large writes to a pipe | |
193 | * return less than the requested size of the write. | |
194 | * In this case, multiple writes are required. | |
195 | */ | |
196 | while ((n = read(fd, buff, buffsize)) > 0) { | |
197 | offset = 0; | |
198 | do { | |
199 | nwritten = write(fileno(stdout), &buff[offset], n); | |
a58e01f9 | 200 | if (nwritten <= 0) { |
ef57e02f | 201 | perror("cat: write error"); |
a58e01f9 MK |
202 | exit(2); |
203 | } | |
ef57e02f RC |
204 | offset += nwritten; |
205 | } while ((n -= nwritten) > 0); | |
206 | } | |
ef57e02f RC |
207 | |
208 | free(buff); | |
a58e01f9 MK |
209 | if (n < 0) { |
210 | perror("cat: read error"); | |
211 | return (1); | |
212 | } | |
213 | return (0); | |
ef57e02f | 214 | } |