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