将文件复制到C中的目录

Copy File to a Directory in C

你如何用 C 编写一个程序来将文件(由源文件路径给出,例如 /input/input.txt)复制到一个存在的目录中?目录中的复制文件必须与输入文件同名。

这是我目前的代码片段:

int copyfile1(char* infilename, char* outfileDir) {
FILE* infile; //File handles for source and destination.
FILE* outfile;
DIR* outfileDir;

infile = fopen(infilename, "r"); // Open the input and output files.
if (infile == NULL) {
  open_file_error(infilename);
  return 1;
}

outfileDir = opendir(outfilename);
if (outfile == NULL) {
  open_file_error(outfilename);
  return 1;
}

outfile = fopen(infilename, "w");

我卡在这里了。我现在不确定如何处理输出文件,因为它应该在目录中。如果我使用 fopen(),它将只在当前目录中创建。

任何帮助将不胜感激。

谢谢!

您可以使用 basename(3) -- http://linux.die.net/man/3/dirname

int copyfile1(char* infilename, char* outfileDir) {
    FILE* infile; //File handles for source and destination.
    FILE* outfile;
    char outfilename[PATH_MAX];

    infile = fopen(infilename, "r"); // Open the input and output files.
    if (infile == NULL) {
      open_file_error(infilename);
      return 1;
    }
    sprintf(outfilename, "%s/%s", outfileDir, basename(infilename))

    outfile = fopen(outfilename, "w");