projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 31cef89c | 1 | static char *sccsid = "@(#)cp.c 4.1 (Berkeley) 10/1/80"; |
| 84592a94 BJ |
2 | /* |
| 3 | * cp oldfile newfile | |
| 4 | */ | |
| 5 | ||
| 6 | #define BSIZE 1024 | |
| 7 | #include <stdio.h> | |
| 8 | #include <sys/types.h> | |
| 9 | #include <sys/stat.h> | |
| 10 | struct stat stbuf1, stbuf2; | |
| 11 | char iobuf[BSIZE]; | |
| 12 | int iflag = 0; /* interactive flag. If this flag is set, | |
| 13 | * the user is queried before files are | |
| 14 | * destroyed by cp. | |
| 15 | */ | |
| 16 | ||
| 17 | main(argc, argv) | |
| 18 | char *argv[]; | |
| 19 | { | |
| 20 | register i, r; | |
| 21 | ||
| 22 | /* get the flag(s) */ | |
| 23 | ||
| 24 | if (argc < 2) | |
| 25 | goto usage; | |
| 26 | if (*argv[1] == '-') { | |
| 27 | argc--; | |
| 28 | while (*++argv[1] != '\0') | |
| 29 | switch (*argv[1]) { | |
| 30 | ||
| 31 | /* interactive mode */ | |
| 32 | case 'i': | |
| 33 | iflag++; | |
| 34 | break; | |
| 35 | ||
| 36 | /* don't live with bad options */ | |
| 37 | default: | |
| 38 | goto usage; | |
| 39 | } | |
| 40 | argv++; | |
| 41 | } | |
| 42 | if (argc < 3) | |
| 43 | goto usage; | |
| 44 | if (argc > 3) { | |
| 45 | if (stat(argv[argc-1], &stbuf2) < 0) | |
| 46 | goto usage; | |
| 47 | if ((stbuf2.st_mode&S_IFMT) != S_IFDIR) | |
| 48 | goto usage; | |
| 49 | } | |
| 50 | r = 0; | |
| 51 | for(i=1; i<argc-1;i++) | |
| 52 | r |= copy(argv[i], argv[argc-1]); | |
| 53 | exit(r); | |
| 54 | usage: | |
| 55 | fprintf(stderr, "Usage: cp: f1 f2; or cp f1 ... fn d2\n"); | |
| 56 | exit(1); | |
| 57 | } | |
| 58 | ||
| 59 | copy(from, to) | |
| 60 | char *from, *to; | |
| 61 | { | |
| 62 | int fold, fnew, n; | |
| 63 | register char *p1, *p2, *bp; | |
| 64 | int mode; | |
| 65 | char c,i; | |
| 66 | if ((fold = open(from, 0)) < 0) { | |
| 67 | fprintf(stderr, "cp: cannot open %s\n", from); | |
| 68 | return(1); | |
| 69 | } | |
| 70 | fstat(fold, &stbuf1); | |
| 71 | mode = stbuf1.st_mode; | |
| 72 | /* is target a directory? */ | |
| 73 | if (stat(to, &stbuf2) >=0 && | |
| 74 | (stbuf2.st_mode&S_IFMT) == S_IFDIR) { | |
| 75 | p1 = from; | |
| 76 | p2 = to; | |
| 77 | bp = iobuf; | |
| 78 | while(*bp++ = *p2++) | |
| 79 | ; | |
| 80 | bp[-1] = '/'; | |
| 81 | p2 = bp; | |
| 82 | while(*bp = *p1++) | |
| 83 | if (*bp++ == '/') | |
| 84 | bp = p2; | |
| 85 | to = iobuf; | |
| 86 | } | |
| 87 | if (stat(to, &stbuf2) >= 0) { | |
| 88 | if (stbuf1.st_dev == stbuf2.st_dev && | |
| 89 | stbuf1.st_ino == stbuf2.st_ino) { | |
| 90 | fprintf(stderr, "cp: cannot copy file to itself.\n"); | |
| 91 | return(1); | |
| 92 | } else if (iflag) { | |
| 93 | fprintf (stderr, "overwrite %s? ", to); | |
| 94 | i = c = getchar(); | |
| 95 | while (c != '\n' && c != EOF) | |
| 96 | c = getchar(); | |
| 97 | if (i != 'y') | |
| 98 | return(1); | |
| 99 | } | |
| 100 | } | |
| 101 | if ((fnew = creat(to, mode)) < 0) { | |
| 102 | fprintf(stderr, "cp: cannot create %s\n", to); | |
| 103 | close(fold); | |
| 104 | return(1); | |
| 105 | } | |
| 106 | while(n = read(fold, iobuf, BSIZE)) { | |
| 107 | if (n < 0) { | |
| 108 | perror("cp: read"); | |
| 109 | close(fold); | |
| 110 | close(fnew); | |
| 111 | return(1); | |
| 112 | } else | |
| 113 | if (write(fnew, iobuf, n) != n) { | |
| 114 | perror("cp: write"); | |
| 115 | close(fold); | |
| 116 | close(fnew); | |
| 117 | return(1); | |
| 118 | } | |
| 119 | } | |
| 120 | close(fold); | |
| 121 | close(fnew); | |
| 122 | return(0); | |
| 123 | } |