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Cream of the Crop 1
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Cream of the Crop 1.iso
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PROGRAM
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DJSRC106.ARJ
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SPLIT.C
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C/C++ Source or Header
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1992-04-09
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85 lines
#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#ifndef O_BINARY
#define O_BINARY 0
#endif
usage()
{
fprintf(stderr,"Usage: split [inputFile] [chunkSize] [outputBase]\n");
fprintf(stderr, "chunksize is bytes or kbytes (ex: 1440k), creates <outputBase>.000, <outputBase>.001, etc\n");
exit(1);
}
p_open(ob, p)
char *ob;
int p;
{
char partname[1024];
sprintf(partname, "%s.%03d", ob, p);
return open(partname, O_WRONLY|O_CREAT|O_TRUNC|O_BINARY, 0666);
}
main(argc, argv)
int argc;
char **argv;
{
char buf[4096];
long chunksize, left, r;
int partnum;
int inf, f;
char *endp;
if (argc != 4)
usage();
inf = open(argv[1], O_RDONLY|O_BINARY);
if (inf < 0)
usage();
chunksize = strtol(argv[2], &endp, 0);
if (chunksize < 1)
usage();
switch (*endp)
{
case 'k':
case 'K':
chunksize *= 1024L;
break;
case 'm':
case 'M':
chunksize *= 1048576L;
break;
}
partnum = 0;
left = chunksize;
f = p_open(argv[3], partnum);
while (1)
{
if (left < 4096)
r = read(inf, buf, left);
else
r = read(inf, buf, 4096);
if (r <= 0)
{
close(f);
close(inf);
exit(0);
}
write(f, buf, r);
left -= r;
if (left == 0)
{
close(f);
partnum++;
f = p_open(argv[3], partnum);
left = chunksize;
}
}
}