.\" .\" Glenn Fowler .\" AT&T Bell Laboratories .\" .\" @(#)bax.1 ([email protected]) 05/09/95 .\" .fp 5 CW .TH BAX 1 .SH NAME bax \- tw + pax delta backup .SH SYNOPSIS .B bax .I file .I base [ .I "dir ..." ] .SH DESCRIPTION .I bax generates backup tapes using .I tw and .IR pax . .I file is the name of the backup archive to be generated. If .I base is .L \- then a full backup is generated in .IR file . Otherwise .I base names a previous full backup against which a delta backup archive is generated in .IR file . The backup starts at the directories .IR "dir ..." , .L / by default. File system boundaries are not crossed; multiple file systems must be specified as separate .I dir arguments. .P Variables defined in the shell script .L ../lib/bax/init located on .L $PATH customize the files and directories to be backed up. The variables and their default values are: .TP \fBarch_name\f5='arch'\fR .TP \fBarch_keep\f5='bin|fun|lib'\fR Shell patterns that match the architecture specific root directories and files. The architecture specific files that match \f5*/${\fIarch_name\f5}/*/${\fIarch_keep\f5}\fR are retained; all other architecture specific files are skipped. .TP \fBbig_size\f5=5000000\fR .TP \fBbig_magic_keep\f5='mail'\fR Files larger than \f5${\fIbig_size\f5}\fR must have a magic file type that matches \f5${\fIbig_magic_keep\f5}\fR. .TP \fBname_skip\f5'?(*.)(old|save|tmp)?(.*)|.*-cache'\fR File base names that match \f5${\fIname_skip\f5}\fR are skipped. .TP \fBpath_skip\f5='/dev|/usr/local/ast/ship'\fR File path names that match \f5${\fIpath_skip\f5}\fR are skipped. .TP \fBreg_magic_skip\f5='core|cql * index|history|TeX dvi'\fR Regular files with a magic file type that matches \f5${\fIreg_magic_skip\f5}\fR are skipped. .TP \fBsrc_name\f5='src'\fR .TP \fBsrc_magic_skip\f5='executable|object|(archive|shared) library'\fR Files under \f5*/${\fIsrc_name\f5}/*\fR with a magic file type that matches \f5${\fIreg_magic_skip\f5}\fR are skipped. .SH EXAMPLES To generate a full backup on \f5/dev/st0\fP: .EX bax /dev/st0 - .EE To generate a delta backup in \f5/tmp/delta.bax\fP for the full backup above: .EX bax /tmp/delta.bax /dev/st0 .EE or if you have two tape drives: .EX mt /dev/st1 eod # to append the next delta bax /dev/st1 /dev/st0 .EE .SH "SEE ALSO" file(1), pax(1), tw(1), vdelta(3)
