github.com/afumu/libc@v0.0.6/musl/src/conf/fpathconf.c (about)

     1  #include <unistd.h>
     2  #include <limits.h>
     3  #include <errno.h>
     4  
     5  long fpathconf(int fd, int name)
     6  {
     7  	static const short values[] = {
     8  		[_PC_LINK_MAX] = _POSIX_LINK_MAX,
     9  		[_PC_MAX_CANON] = _POSIX_MAX_CANON,
    10  		[_PC_MAX_INPUT] = _POSIX_MAX_INPUT,
    11  		[_PC_NAME_MAX] = NAME_MAX,
    12  		[_PC_PATH_MAX] = PATH_MAX,
    13  		[_PC_PIPE_BUF] = PIPE_BUF,
    14  		[_PC_CHOWN_RESTRICTED] = 1,
    15  		[_PC_NO_TRUNC] = 1,
    16  		[_PC_VDISABLE] = 0,
    17  		[_PC_SYNC_IO] = 1,
    18  		[_PC_ASYNC_IO] = -1,
    19  		[_PC_PRIO_IO] = -1,
    20  		[_PC_SOCK_MAXBUF] = -1,
    21  		[_PC_FILESIZEBITS] = FILESIZEBITS,
    22  		[_PC_REC_INCR_XFER_SIZE] = 4096,
    23  		[_PC_REC_MAX_XFER_SIZE] = 4096,
    24  		[_PC_REC_MIN_XFER_SIZE] = 4096,
    25  		[_PC_REC_XFER_ALIGN] = 4096,
    26  		[_PC_ALLOC_SIZE_MIN] = 4096,
    27  		[_PC_SYMLINK_MAX] = -1,
    28  		[_PC_2_SYMLINKS] = 1
    29  	};
    30  	if (name >= sizeof(values)/sizeof(values[0])) {
    31  		errno = EINVAL;
    32  		return -1;
    33  	}
    34  	return values[name];
    35  }