144 lines
2.8 KiB
C++
144 lines
2.8 KiB
C++
#include <BAN/String.h>
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#include <BAN/Vector.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/stat.h>
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#define STR_STARTS_WITH(str, arg) (strncmp(str, arg, sizeof(arg) - 1) == 0)
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#define STR_EQUAL(str, arg) (strcmp(str, arg) == 0)
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bool copy_file(const BAN::String& source, BAN::String destination)
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{
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struct stat st;
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if (stat(source.data(), &st) == -1)
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{
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fprintf(stderr, "%s: ", source.data());
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perror("stat");
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return false;
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}
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if (!S_ISREG(st.st_mode))
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{
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fprintf(stderr, "%s: not a directory\n", source.data());
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return false;
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}
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if (stat(destination.data(), &st) != -1 && S_ISDIR(st.st_mode))
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{
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MUST(destination.push_back('/'));
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MUST(destination.append(MUST(source.sv().split('/')).back()));
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}
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int src_fd = open(source.data(), O_RDONLY);
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if (src_fd == -1)
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{
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fprintf(stderr, "%s: ", source.data());
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perror("open");
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return false;
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}
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int dest_fd = open(destination.data(), O_CREAT | O_TRUNC | O_WRONLY, 0644);
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if (dest_fd == -1)
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{
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fprintf(stderr, "%s: ", destination.data());
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perror("open");
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close(src_fd);
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return false;
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}
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bool ret = true;
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char buffer[1024];
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while (ssize_t nread = read(src_fd, buffer, sizeof(buffer)))
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{
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if (nread < 0)
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{
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fprintf(stderr, "%s: ", source.data());
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perror("read");
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ret = false;
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break;
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}
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size_t written = 0;
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while (written < nread)
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{
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ssize_t nwrite = write(dest_fd, buffer, nread - written);
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if (nwrite < 0)
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{
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fprintf(stderr, "%s: ", destination.data());
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perror("write");
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ret = false;
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}
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if (nwrite == 0)
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break;
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written += nwrite;
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}
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if (written < nread)
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break;
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}
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close(src_fd);
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close(dest_fd);
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return ret;
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}
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bool copy_file_to_directory(const BAN::String& source, const BAN::String& destination)
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{
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auto temp = destination;
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MUST(temp.append(MUST(source.sv().split('/')).back()));
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return copy_file(source, destination);
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}
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void usage(const char* argv0, int ret)
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{
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FILE* out = (ret == 0) ? stdout : stderr;
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fprintf(out, "usage: %s [OPTIONS]... SOURCE... DEST\n", argv0);
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fprintf(out, "Copies files SOURCE... to DEST\n");
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fprintf(out, "OPTIONS:\n");
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fprintf(out, " -h, --help\n");
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fprintf(out, " Show this message and exit\n");
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exit(ret);
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}
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int main(int argc, char** argv)
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{
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BAN::Vector<BAN::StringView> src;
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BAN::StringView dest;
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int i = 1;
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for (; i < argc; i++)
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{
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if (STR_EQUAL(argv[i], "-h") || STR_EQUAL(argv[i], "--help"))
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{
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usage(argv[0], 0);
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}
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else if (argv[i][0] == '-')
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{
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fprintf(stderr, "Unknown argument %s\n", argv[i]);
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usage(argv[0], 1);
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}
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else
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{
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break;
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}
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}
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for (; i < argc - 1; i++)
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MUST(src.push_back(argv[i]));
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dest = argv[argc - 1];
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if (src.empty())
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{
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fprintf(stderr, "Missing destination operand\n");
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usage(argv[0], 1);
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}
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int ret = 0;
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for (auto file_path : src)
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if (!copy_file(file_path, dest))
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ret = 1;
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return ret;
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}
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