Linux Standard Base Core Specification 4.1 | ||
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The gzopen() function shall open the compressed file named by path. The mode argument is based on that of fopen(), but the mode parameter may also contain the following characters:
If path refers to an uncompressed file, and mode refers to a read mode, gzopen() shall attempt to open the file and return a gzFile object suitable for reading directly from the file without any decompression.
If path or mode
is NULL, or if mode does not contain
one of r, w, or a,
gzopen() shall return Z_NULL
,
and need not set any other error condition.
The gzFile object is also referred to as a compressed file stream.
gzopen("file.gz", "w6h"); |
On success, gzopen() shall return a
gzFile object (also known as a compressed
file stream). On failure,
gzopen() shall return Z_NULL
and
may set errno
accordingly.
Note: At version 1.2.2,
zlib
does not seterrno
for several error conditions. Applications may not be able to determine the cause of an error.
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