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author | rgrimes <rgrimes@FreeBSD.org> | 1994-05-27 12:33:43 +0000 |
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committer | rgrimes <rgrimes@FreeBSD.org> | 1994-05-27 12:33:43 +0000 |
commit | f9ab90d9d6d02989a075d0f0074496d5b1045e4b (patch) | |
tree | add7e996bac5289cdc55e6935750c352505560a9 /usr.bin/compress/zopen.3 | |
parent | be22b15ae2ff8d7fe06b6e14fddf0c5b444a95da (diff) | |
download | FreeBSD-src-f9ab90d9d6d02989a075d0f0074496d5b1045e4b.zip FreeBSD-src-f9ab90d9d6d02989a075d0f0074496d5b1045e4b.tar.gz |
BSD 4.4 Lite Usr.bin Sources
Diffstat (limited to 'usr.bin/compress/zopen.3')
-rw-r--r-- | usr.bin/compress/zopen.3 | 139 |
1 files changed, 139 insertions, 0 deletions
diff --git a/usr.bin/compress/zopen.3 b/usr.bin/compress/zopen.3 new file mode 100644 index 0000000..853462f --- /dev/null +++ b/usr.bin/compress/zopen.3 @@ -0,0 +1,139 @@ +.\" Copyright (c) 1992, 1993 +.\" The Regents of the University of California. All rights reserved. +.\" +.\" Redistribution and use in source and binary forms, with or without +.\" modification, are permitted provided that the following conditions +.\" are met: +.\" 1. Redistributions of source code must retain the above copyright +.\" notice, this list of conditions and the following disclaimer. +.\" 2. Redistributions in binary form must reproduce the above copyright +.\" notice, this list of conditions and the following disclaimer in the +.\" documentation and/or other materials provided with the distribution. +.\" 3. All advertising materials mentioning features or use of this software +.\" must display the following acknowledgement: +.\" This product includes software developed by the University of +.\" California, Berkeley and its contributors. +.\" 4. Neither the name of the University nor the names of its contributors +.\" may be used to endorse or promote products derived from this software +.\" without specific prior written permission. +.\" +.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND +.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE +.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE +.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE +.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL +.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS +.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) +.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT +.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY +.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF +.\" SUCH DAMAGE. +.\" +.\" @(#)zopen.3 8.1 (Berkeley) 6/9/93 +.\" +.Dd June 9, 1993 +.Dt ZOPEN 3 +.Os +.Sh NAME +.Nm zopen +.Nd compressed stream open function +.Sh SYNOPSIS +.Fd #include <stdio.h> +.Ft FILE * +.Fn zopen "const char *path" "const char *mode" "int bits" +.Sh DESCRIPTION +The +.Fn zopen +function +opens the compressed file whose name is the string pointed to by +.Fa path +and associates a stream with it. +.Pp +The argument +.Fa mode +points to one of the following one-character strings: +.Bl -tag -width indent +.It Dq Li r +Open compressed file for reading. +The stream is positioned at the beginning of the file. +.It Dq Li w +Truncate file to zero length or create compressed file for writing. +The stream is positioned at the beginning of the file. +.El +.Pp +Any created files will have mode +.Pf \\*q Dv S_IRUSR +\&| +.Dv S_IWUSR +\&| +.Dv S_IRGRP +\&| +.Dv S_IWGRP +\&| +.Dv S_IROTH +\&| +.Dv S_IWOTH Ns \\*q +.Pq Li 0666 , +as modified by the process' +umask value (see +.Xr umask 2 ) . +.Pp +Files may only be read or written. +Seek operations are not allowed. +.Pp +The +.Fa bits +argument, if non-zero, is set to the bits code limit. +If zero, the default is 16. +See +.Fn compress 1 +for more information. +.Sh RETURN VALUES +Upon successful completion +.Fn zopen +returns a +.Tn FILE +pointer. +Otherwise, +.Dv NULL +is returned and the global variable +.Va errno +is set to indicate the error. +.Sh ERRORS +.Bl -tag -width [EINVAL] +.It Bq Er EINVAL +The +.Fa mode +or +.Fa bits +arguments specified to +.Fn zopen +were invalid. +.It Bq Er EFTYPE +The compressed file starts with an invalid header, or the compressed +file is compressed with more bits than can be handled. +.El +.Pp +The +.Fn zopen +function may also fail and set +.Va errno +for any of the errors specified for the routines +.Xr fopen 3 +or +.Xr funopen 3 . +.Sh SEE ALSO +.Xr compress 1 , +.Xr fopen 3 , +.Xr funopen 3 +.Sh HISTORY +The +.Nm zopen +function +first appeared in 4.4BSD. +.Sh BUGS +The +.Fn zopen +function +may not be portable to systems other than +.Bx . |