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Annotation of coherent/d/usr/src/examples/open.c, revision 1.1.1.1

1.1       root        1: #include <stdio.h>
                      2: #define BUFSIZE (20*512)
                      3: 
                      4: char buf[BUFSIZE];
                      5: 
                      6: void
                      7: fatal(s)
                      8: char *s;
                      9: {
                     10:        fprintf(stderr, "%s\n", s);
                     11:        exit(1);
                     12: }
                     13: 
                     14: main(argc, argv)
                     15: int argc; char *argv[];
                     16: {
                     17:        register int ifd, ofd;
                     18:        register unsigned int n;
                     19: 
                     20:        if (argc != 3)
                     21:                fatal("Usage: open source destination");
                     22:        if ((ifd = open(argv[1], 0)) == -1)
                     23:                fatal("cannot open input file");
                     24:        if ((ofd = creat(argv[2], 0)) == -1)
                     25:                fatal("cannot open output file");
                     26: 
                     27:        while ((n = read(ifd, buf, BUFSIZE)) != 0) {
                     28:                if (n == -1)
                     29:                        fatal("read error");
                     30:                if (write(ofd, buf, n) != n)
                     31:                        fatal("write error");
                     32:        }
                     33: 
                     34:        if (close(ifd) == -1 || close(ofd) == -1)
                     35:                fatal("cannot close");
                     36:        exit(0);
                     37: }
                     38: 
                     39: 

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