Checks if a directory exists

Checks if a file exists

Reads the entire content of a file into a string

Writes the entire content (at once) of a file

The _chdir function changes the current working directory to the directory specified by dirname

Gets the error for the last I/O operation

Gets the file descriptor associated with a stream

Get a value from the current environment

Create a new directory

Create, modify, or remove environment variables

The _rmdir function deletes the directory specified by directory_path

Get status information on a file

The _unlink function deletes the file specified by filename

The closedir function closes the named directory stream

Gets the name of a directory returned by a call to readdir

Loads and executes a new process (independent of the current one)

Closes a file opened with fopen

The feof function tests for end-of-file on a stream

The fflush function flushes a stream associated with file descriptor fd

fgetc reads a single character from the current position of a file associated with fd

The fgets function reads a string from the input fd argument and stores it in buffer

fgetstring reads one item from the input file, fd, formed by the string separator, with maximum size max_size

Gets the group id of the owner of a file

Gets the last access time of a file

Gets the last changed date/time of a file

Gets the last modification date/time of a file

Returns the file length, in bytes, of the target file

Gets the type of a file

Gets the used id of the owner of a file

The fopen function opens the file specified by filename

fputc writes the single character ch to a file at the position indicated by the associated file position indicator (if defined) and advances the indicator as appropriate; the file is associated with fd

fputs copies buffer to the output stream fd at the current position, without the terminating null character

The fread function reads up to count items of size bytes from the input file and stores them in buffer

The freopen function closes the file currently associated with fd and reassigns fd to the file specified by path

The fseek function moves the file pointer (if any) associated with fd to a new location that is offset bytes from origin

Gets the file length, in bytes, of the target file

The ftell function gets the current position of the file pointer (if any) associated with the file descriptor

The fwrite function writes up to count items, of size length each, from buffer to the output file

The opendir() function opens the directory named by filename, associates a directory stream with it and returns a pointer to be used to identify the directory stream in subsequent operations

The readdir function returns an identifier to the next directory entry

The remove function deletes the file or directory specified by path

The rewinddir() function resets the position of the named directory stream to the beginning of the directory

The seekdir() function sets the position of the next readdir operation on the directory stream

The telldir function returns the current location associated with the named directory stream