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#include "internal.h"
#include <stdio.h>
#include <sys/stat.h>
#include <sys/fcntl.h>
#include <sys/param.h>
#include <errno.h>
const char cp_usage[] = "cp [-r] source-file destination-file\n"
"\t\tcp [-r] source-file [source-file ...] destination-directory\n"
"\n"
"\tCopy the source files to the destination.\n"
"\n"
"\t-r:\tRecursively copy all files and directories\n"
"\t\tunder the argument directory.";
extern int
cp_fn(const struct FileInfo * i)
{
int sourceFd;
int destinationFd;
const char * destination = i->destination;
struct stat destination_stat;
int status;
char buf[8192];
char d[PATH_MAX];
if ( (i->stat.st_mode & S_IFMT) == S_IFDIR ) {
if ( mkdir(destination, i->stat.st_mode & ~S_IFMT)
!= 0 && errno != EEXIST ) {
name_and_error(destination);
return 1;
}
return 0;
}
if ( (sourceFd = open(i->source, O_RDONLY)) < 0 ) {
name_and_error(i->source);
return 1;
}
if ( stat(destination, &destination_stat) == 0 ) {
if ( i->stat.st_ino == destination_stat.st_ino
&& i->stat.st_dev == destination_stat.st_dev ) {
fprintf(stderr
,"copy of %s to %s would copy file to itself.\n"
,i->source
,destination);
close(sourceFd);
return 1;
}
}
/*
* If the destination is a directory, create a file within it.
*/
if ( (destination_stat.st_mode & S_IFMT) == S_IFDIR ) {
destination = join_paths(
d
,i->destination
,&i->source[i->directoryLength]);
if ( stat(destination, &destination_stat) == 0 ) {
if ( i->stat.st_ino == destination_stat.st_ino
&& i->stat.st_dev == destination_stat.st_dev ) {
fprintf(stderr
,"copy of %s to %s would copy file to itself.\n"
,i->source
,destination);
close(sourceFd);
return 1;
}
}
}
destinationFd = creat(destination, i->stat.st_mode & 07777);
while ( (status = read(sourceFd, buf, sizeof(buf))) > 0 ) {
if ( write(destinationFd, buf, status) != status ) {
name_and_error(destination);
close(sourceFd);
close(destinationFd);
return 1;
}
}
close(sourceFd);
close(destinationFd);
if ( status < 0 ) {
name_and_error(i->source);
return 1;
}
return 0;
}
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