Commit | Line | Data |
---|---|---|
efa30d97 BJ |
1 | /* |
2 | * Concatenate files. | |
3 | */ | |
45fb66b3 | 4 | static char *Sccsid = "@(#)cat.c 4.5 (Berkeley) %G%"; |
efa30d97 BJ |
5 | |
6 | #include <stdio.h> | |
7 | #include <sys/types.h> | |
8 | #include <sys/stat.h> | |
9 | ||
10 | char stdbuf[BUFSIZ]; | |
3c67f80d BJ |
11 | int bflg, eflg, nflg, sflg, tflg, vflg; |
12 | int spaced, col, lno, inline; | |
efa30d97 BJ |
13 | |
14 | main(argc, argv) | |
15 | char **argv; | |
16 | { | |
17 | int fflg = 0; | |
18 | register FILE *fi; | |
19 | register c; | |
20 | int dev, ino = -1; | |
21 | struct stat statb; | |
22 | ||
3c67f80d | 23 | lno = 1; |
efa30d97 BJ |
24 | setbuf(stdout, stdbuf); |
25 | for( ; argc>1 && argv[1][0]=='-'; argc--,argv++) { | |
26 | switch(argv[1][1]) { | |
27 | case 0: | |
28 | break; | |
29 | case 'u': | |
30 | setbuf(stdout, (char *)NULL); | |
31 | continue; | |
3c67f80d BJ |
32 | case 'n': |
33 | nflg++; | |
34 | continue; | |
35 | case 'b': | |
36 | bflg++; | |
37 | nflg++; | |
38 | continue; | |
39 | case 'v': | |
40 | vflg++; | |
41 | continue; | |
42 | case 's': | |
43 | sflg++; | |
44 | continue; | |
45 | case 'e': | |
46 | eflg++; | |
47 | vflg++; | |
48 | continue; | |
49 | case 't': | |
50 | tflg++; | |
51 | vflg++; | |
52 | continue; | |
efa30d97 BJ |
53 | } |
54 | break; | |
55 | } | |
72c98f6b EC |
56 | if (fstat(fileno(stdout), &statb) == 0) { |
57 | statb.st_mode &= S_IFMT; | |
58 | if (statb.st_mode!=S_IFCHR && statb.st_mode!=S_IFBLK) { | |
59 | dev = statb.st_dev; | |
60 | ino = statb.st_ino; | |
61 | } | |
efa30d97 BJ |
62 | } |
63 | if (argc < 2) { | |
64 | argc = 2; | |
65 | fflg++; | |
66 | } | |
67 | while (--argc > 0) { | |
68 | if (fflg || (*++argv)[0]=='-' && (*argv)[1]=='\0') | |
69 | fi = stdin; | |
70 | else { | |
71 | if ((fi = fopen(*argv, "r")) == NULL) { | |
45fb66b3 | 72 | perror(*argv); |
efa30d97 BJ |
73 | continue; |
74 | } | |
75 | } | |
72c98f6b | 76 | if (fstat(fileno(fi), &statb) == 0) { |
ec0bdac7 BJ |
77 | if ((statb.st_mode & S_IFMT) == S_IFREG && |
78 | statb.st_dev==dev && statb.st_ino==ino) { | |
72c98f6b EC |
79 | fprintf(stderr, "cat: input %s is output\n", |
80 | fflg?"-": *argv); | |
81 | fclose(fi); | |
82 | continue; | |
83 | } | |
efa30d97 | 84 | } |
3c67f80d BJ |
85 | if (nflg||sflg||vflg) |
86 | copyopt(fi); | |
87 | else { | |
88 | while ((c = getc(fi)) != EOF) | |
89 | putchar(c); | |
90 | } | |
efa30d97 BJ |
91 | if (fi!=stdin) |
92 | fclose(fi); | |
93 | } | |
3c67f80d BJ |
94 | if (ferror(stdout)) |
95 | fprintf(stderr, "cat: output write error\n"); | |
efa30d97 BJ |
96 | return(0); |
97 | } | |
3c67f80d BJ |
98 | |
99 | copyopt(f) | |
100 | register FILE *f; | |
101 | { | |
102 | register int c; | |
103 | ||
104 | top: | |
105 | c = getc(f); | |
106 | if (c == EOF) | |
107 | return; | |
108 | if (c == '\n') { | |
109 | if (inline == 0) { | |
110 | if (sflg && spaced) | |
111 | goto top; | |
112 | spaced = 1; | |
113 | } | |
114 | if (nflg && bflg==0 && inline == 0) | |
115 | printf("%6d\t", lno++); | |
116 | if (eflg) | |
117 | putchar('$'); | |
118 | putchar('\n'); | |
119 | inline = 0; | |
120 | goto top; | |
121 | } | |
122 | if (nflg && inline == 0) | |
123 | printf("%6d\t", lno++); | |
124 | inline = 1; | |
125 | if (vflg) { | |
126 | if (tflg==0 && c == '\t') | |
127 | putchar(c); | |
128 | else { | |
129 | if (c > 0177) { | |
130 | printf("M-"); | |
131 | c &= 0177; | |
132 | } | |
133 | if (c < ' ') | |
134 | printf("^%c", c+'@'); | |
135 | else if (c == 0177) | |
136 | printf("^?"); | |
137 | else | |
138 | putchar(c); | |
139 | } | |
140 | } else | |
141 | putchar(c); | |
142 | spaced = 0; | |
143 | goto top; | |
144 | } |