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stg_v4.lzh
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chop.c
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C/C++ Source or Header
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1994-11-11
|
968b
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63 lines
/*
* chop file in two parts at specific byte
*
* 93/08/15 StG - initially requested by paul jerkatis
*/
#define ERR (-1)
extern int errno;
main(argc,argv)
int argc;
char **argv;
{
int file,bytes,file1,file2;
long size;
char *buf;
if (argc<5)
{
printf("use: chop (source-file) (bytes) (file1) (file2)\n");
exit(1);
}
file=open(argv[1],1);
if (file==ERR)
{
printf("cant open %s\n",argv[1]);
exit(errno);
}
size=_gs_size(file);
buf=malloc(size);
if (!buf)
exit(errno);
errno=211;
if (read(file,buf,size)!=size)
exit(errno);
bytes=atoi(argv[2]);
if (bytes>size)
exit(211);
file1=creat(argv[3],3);
if (file==ERR)
{
printf("cant create %s\n",argv[3]);
exit(errno);
}
file2=creat(argv[4],3);
if (file==ERR)
{
printf("cant create %s\n",argv[4]);
exit(errno);
}
write(file1,buf,bytes);
write(file2,buf+bytes,size-bytes);
close(file1);
close(file2);
}