[英]C function to copy directory in UNIX: files fail to copy
我试图用C编写一个函数,将目录的内容复制到另一个目录。 这是我到目前为止的内容:
void *copydirectory(void *arg1, void *arg2)
{
int error;
struct dirent *direntp;
DIR *dirp_source, *dirp_destination;
char *source, *destination;
copy_t copy;
char filename[MAXNAME];
// Set directory arguments
source = arg1;
destination = arg2;
fprintf(stderr, "Source directory is %s and destination directory is %s\n", source, destination);
// Open directories
if ((dirp_source = opendir(source)) == NULL)
{
fprintf(stderr, "Failed to open %s\n", source);
return 1;
}
if ((dirp_destination = opendir(destination)) == NULL)
{
perror("Failed to open destination directory");
return 1;
}
// Read files in directory
while ((direntp = readdir(dirp_source)) != NULL)
{
copy.tid = pthread_self();
fprintf(stderr, "now at line 64\n");
// Copy source filename
if (snprintf(filename, MAXNAME, direntp->d_name) == MAXNAME)
{
fprintf(stderr, "Input filename %s is too long", direntp->d_name);
continue;
}
fprintf(stderr, "now at line 73\n");
fprintf(stderr, "%s\n", filename);
// Open file for reading
if ((copy.args[0] = open(filename, R_FLAGS)) == -1)
{
fprintf(stderr, "Failed to open source file %s: %s\n", filename, strerror(errno));
continue;
}
// Create destination filename for writing
if (snprintf(filename, MAXNAME, "%s", direntp->d_name) == MAXNAME)
{
fprintf(stderr, "Output filename %s is too long\n", direntp->d_name);
continue;
}
fprintf(stderr, "%s\n", filename);
// Open file for writing
if ((copy.args[1] = open(filename, W_FLAGS, W_PERMS)) == -1)
{
fprintf(stderr, "Failed to open destination file %s: %s\n", filename, strerror(errno));
continue;
}
if (error = pthread_create((©.tid), NULL, copyfilepass, copy.args))
{
fprintf(stderr, "Failed to create thread: %s\n", strerror(error));
copy.tid = pthread_self();
}
}
// Close directory
while ((closedir(dirp_source) == -1) && (errno = EINTR));
fprintf(stderr, "Successfully copied all files in directory \n");
}
现在,为了进行测试,我仅在名为dir1和dir2的文件夹中有2个目录。 dir1包含3个文件:file1,file2,file3。 但是,当我编译并运行代码时,会收到以下消息:
./
./
Failed to open destination file .: is a directory
Failed to open source file file2: No such file or directory
Failed to open source file file3: No such file or directory
../
../
Failed to open destination file .: is a directory
Failed to open source file file1: No such file or directory
任何人有什么问题的建议吗?
无法打开目标文件。:是目录
您看到此消息是因为源目录包含名为"."
链接"."
和".."
指向其自身及其父目录。 您应该专门检查并避免这些条目。
无法打开源文件file2:没有此类文件或目录
之所以会看到这种情况,是因为您正在尝试在该进程的当前工作目录中打开一个名为"file2"
的文件,但该文件不存在-您要使用的文件位于源目录中。 您需要考虑以下因素来构建文件名:
// Copy source filename
if (snprintf(filename, MAXNAME, "%s/%s", source, direntp->d_name) == MAXNAME)
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