Commit | Line | Data |
---|---|---|
205a2d85 | 1 | #ifndef lint |
ef57e02f | 2 | static char *sccsid = "@(#)cat.c 4.8 (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 | ||
ef57e02f RC |
13 | /* #define OPTSIZE BUFSIZ /* define this only if not 4.2 BSD */ |
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 | } | |
ef57e02f | 67 | obsize = statb.st_blksize; |
efa30d97 | 68 | } |
ef57e02f RC |
69 | else |
70 | obsize = 0; | |
efa30d97 BJ |
71 | if (argc < 2) { |
72 | argc = 2; | |
73 | fflg++; | |
74 | } | |
75 | while (--argc > 0) { | |
76 | if (fflg || (*++argv)[0]=='-' && (*argv)[1]=='\0') | |
77 | fi = stdin; | |
78 | else { | |
79 | if ((fi = fopen(*argv, "r")) == NULL) { | |
45fb66b3 | 80 | perror(*argv); |
ef57e02f | 81 | retval = 1; |
efa30d97 BJ |
82 | continue; |
83 | } | |
84 | } | |
72c98f6b | 85 | if (fstat(fileno(fi), &statb) == 0) { |
ec0bdac7 BJ |
86 | if ((statb.st_mode & S_IFMT) == S_IFREG && |
87 | statb.st_dev==dev && statb.st_ino==ino) { | |
72c98f6b EC |
88 | fprintf(stderr, "cat: input %s is output\n", |
89 | fflg?"-": *argv); | |
90 | fclose(fi); | |
ef57e02f | 91 | retval = 1; |
72c98f6b EC |
92 | continue; |
93 | } | |
ef57e02f | 94 | ibsize = statb.st_blksize; |
efa30d97 | 95 | } |
ef57e02f RC |
96 | else |
97 | ibsize = 0; | |
3c67f80d BJ |
98 | if (nflg||sflg||vflg) |
99 | copyopt(fi); | |
ef57e02f | 100 | else if (uflg) { |
3c67f80d BJ |
101 | while ((c = getc(fi)) != EOF) |
102 | putchar(c); | |
ef57e02f RC |
103 | } else |
104 | fastcat(fileno(fi)); /* no flags specified */ | |
efa30d97 BJ |
105 | if (fi!=stdin) |
106 | fclose(fi); | |
ef57e02f RC |
107 | if (ferror(stdout)) { |
108 | fprintf(stderr, "cat: output write error\n"); | |
109 | retval = 1; | |
110 | break; | |
111 | } | |
efa30d97 | 112 | } |
ef57e02f | 113 | exit(retval); |
efa30d97 | 114 | } |
3c67f80d BJ |
115 | |
116 | copyopt(f) | |
117 | register FILE *f; | |
118 | { | |
119 | register int c; | |
120 | ||
121 | top: | |
122 | c = getc(f); | |
123 | if (c == EOF) | |
124 | return; | |
125 | if (c == '\n') { | |
126 | if (inline == 0) { | |
127 | if (sflg && spaced) | |
128 | goto top; | |
129 | spaced = 1; | |
130 | } | |
131 | if (nflg && bflg==0 && inline == 0) | |
132 | printf("%6d\t", lno++); | |
133 | if (eflg) | |
134 | putchar('$'); | |
135 | putchar('\n'); | |
136 | inline = 0; | |
137 | goto top; | |
138 | } | |
139 | if (nflg && inline == 0) | |
140 | printf("%6d\t", lno++); | |
141 | inline = 1; | |
142 | if (vflg) { | |
143 | if (tflg==0 && c == '\t') | |
144 | putchar(c); | |
145 | else { | |
146 | if (c > 0177) { | |
147 | printf("M-"); | |
148 | c &= 0177; | |
149 | } | |
150 | if (c < ' ') | |
151 | printf("^%c", c+'@'); | |
152 | else if (c == 0177) | |
153 | printf("^?"); | |
154 | else | |
155 | putchar(c); | |
156 | } | |
157 | } else | |
158 | putchar(c); | |
159 | spaced = 0; | |
160 | goto top; | |
161 | } | |
ef57e02f RC |
162 | |
163 | fastcat(fd) | |
164 | register int fd; | |
165 | { | |
166 | register int buffsize, n, nwritten, offset; | |
167 | register char *buff; | |
168 | struct stat statbuff; | |
169 | char *malloc(); | |
170 | ||
171 | #ifndef OPTSIZE | |
172 | if (ibsize == 0) | |
173 | buffsize = BUFSIZ; /* handle reads from a pipe */ | |
174 | else if (obsize == 0) | |
175 | buffsize = ibsize; | |
176 | else | |
177 | buffsize = obsize; /* common case, use output blksize */ | |
178 | #else | |
179 | buffsize = OPTSIZE; | |
180 | #endif | |
181 | ||
182 | if ((buff = malloc(buffsize)) == NULL) | |
183 | perror("cat: no memory"); | |
184 | ||
185 | /* | |
186 | * Note that on some systems (V7), very large writes to a pipe | |
187 | * return less than the requested size of the write. | |
188 | * In this case, multiple writes are required. | |
189 | */ | |
190 | while ((n = read(fd, buff, buffsize)) > 0) { | |
191 | offset = 0; | |
192 | do { | |
193 | nwritten = write(fileno(stdout), &buff[offset], n); | |
194 | if (nwritten <= 0) | |
195 | perror("cat: write error"); | |
196 | offset += nwritten; | |
197 | } while ((n -= nwritten) > 0); | |
198 | } | |
199 | if (n < 0) | |
200 | perror("cat: read error"); | |
201 | ||
202 | free(buff); | |
203 | } |