89 lines
1.9 KiB
C
89 lines
1.9 KiB
C
/* vim: tabstop=4 shiftwidth=4 noexpandtab
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* This file is part of ToaruOS and is released under the terms
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* of the NCSA / University of Illinois License - see LICENSE.md
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* Copyright (C) 2013 K. Lange
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* Copyright (C) 2013 Tyler Bindon
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*
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* cp - Copy files
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*
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* This is an incomplete implementation of `cp`. A more complete
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* version of recursive directory copying can be found in the
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* `migrate` sources, and should probably be imported here.
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*/
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#include <stdlib.h>
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#include <string.h>
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#include <stdio.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <sys/stat.h>
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#define CHUNK_SIZE 4096
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int main(int argc, char ** argv) {
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FILE * fd;
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FILE * fout;
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if (argc < 3) {
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fprintf(stderr, "usage: %s [source] [destination]\n", argv[0]);
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return 1;
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}
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fd = fopen(argv[1], "r");
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if (!fd) {
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fprintf(stderr, "%s: %s: %s\n", argv[0], argv[1], strerror(errno));
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return 1;
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}
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struct stat statbuf;
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stat(argv[1], &statbuf);
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int initial_mode = statbuf.st_mode;
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char * target_path = NULL;
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stat(argv[2], &statbuf);
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if (S_ISDIR(statbuf.st_mode)) {
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char *filename = strrchr(argv[1], '/');
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if (!filename) {
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filename = argv[1];
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}
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target_path = malloc((strlen(argv[2]) + strlen(filename) + 2) * sizeof(char));
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sprintf(target_path, "%s/%s", argv[2], filename );
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fout = fopen( target_path, "w" );
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} else {
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target_path = argv[2];
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fout = fopen( argv[2], "w" );
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}
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if (!fout) {
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fprintf(stderr, "%s: %s: %s\n", argv[0], target_path, strerror(errno));
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return 1;
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}
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size_t length;
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fseek(fd, 0, SEEK_END);
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length = ftell(fd);
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fseek(fd, 0, SEEK_SET);
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char buf[CHUNK_SIZE];
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while (length > CHUNK_SIZE) {
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fread( buf, 1, CHUNK_SIZE, fd);
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fwrite(buf, 1, CHUNK_SIZE, fout);
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length -= CHUNK_SIZE;
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}
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if (length > 0) {
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fread( buf, 1, length, fd);
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fwrite(buf, 1, length, fout);
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}
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fclose(fd);
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fclose(fout);
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if (chmod(target_path, initial_mode) < 0) {
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fprintf(stderr, "%s: %s: %s\n", argv[0], argv[2], strerror(errno));
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}
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return 0;
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}
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