fopen.3s (2010 09)

fopen(3S) fopen(3S)

ERRORS

fopen(), fdopen(), and freopen() fail if:

[EBADF] The ﬁldes argument is not a valid ﬁle descriptor.

[EINVAL] The type argument is not a valid mode.

[ENOMEM] There is insufﬁcient space to allocate a buffer.

fopen() and freopen() fail if:

[EACCES] Search permission is denied on a component of the path preﬁx, or the ﬁle exists and

the permissions speciﬁed by type are denied, or the ﬁle does not exist and write per-

mission is denied for the parent directory of the ﬁle to be created.

[EINTR] A signal was caught during

fopen()

or freopen(). function.

[EISDIR] The named ﬁle is a directory and type requires write access.

[EMFILE] The calling process has attempted to exceed its open ﬁle limit.

[ENAMETOOLONG]

The length of the pathname string exceeds

PATH_MAX

or a pathname component is

longer than

NAME_MAX while POSIX_NO_TRUNC

is in effect.

[ENFILE] The system ﬁle table is full.

[ENOENT] The named ﬁle does not exist or the pathname argument points to an empty string.

[ENOSPC] The directory or ﬁle system that would contain the new ﬁle cannot be expanded, the

ﬁle does not exist, and it was to be created.

[ENOTDIR] A component of the path preﬁx is not a directory.

[ENXIO] The named ﬁle is a character special or block special ﬁle, and the device associated

with the special ﬁle does not exist.

[EOVERFLOW] The named ﬁle is a regular ﬁle and the size of the ﬁle cannot be represented correctly

in an object of size

off_t in this environment.

[EROFS] The named ﬁle resides on a read-only ﬁle system and type requires write access.

Additional

errno values can be set by the underlying open() call made from the fopen() and

freopen() functions (see open(2)).