z/OS V1R9.0 UNIX System Services Command ... - Christian Grothoff

patch
same file, patch only creates file orig. When you also specify –o outfile,
patch does not create file-.orig, but if outfile already exists, it creates
outfile.orig.
–c Interprets the patchfile as a context diff file (the output of diff when –c or
–C is specified). You cannot use this option with –e or –n.
–D symbol
Marks changes with the C preprocessor construct:
#ifdef symbol
...
#endif
When you compile the resulting (patched) file, you get the original file if
symbol is not defined, and the changed file if symbol is defined.
–d dir Changes the current directory to dir before processing the patch.
–e Interprets the patchfile as an ed script (the output of diff when –e is
specified). You cannot use this option with –c or –n.
–F n Specifies the number of lines of a context diff to ignore when searching for
a place to install a patch.
–f Forces processing without requesting additional information from the user.
–i patchfile
Reads the patchfile information from the file patchfile . If you do not specify
patchfile, patch reads the information from the standard input.
–l Matches any sequences of blanks in the patchfile to any sequence of
blanks in the input file. In other words, patch considers two lines equivalent
if the only difference between the two is their spacing.
–N Ignores any patches that have already been applied. By default, patch
rejects already-applied patches.
–n Interprets the patchfile as normal diff output. You cannot use this option
with –c or –e.
–o outfile
Writes patched output to outfile instead of to the original file. When you
specify more than one patch to a single file, patch applies the patches to
intermediate versions of the file created by previous patches, resulting in
multiple, concatenated versions of the file being written to outfile.
–p n Deletes n components from the beginning of all pathnames found in the
patch file. If a pathname is an absolute pathname (that is, starts with a
slash), patch treats the leading slash as the first component of the path,
and patch –p 1 deletes the leading slash. Specifying –p 0 tells patch to
use the full pathnames given in the patchfile. If you do not specify this
option, patch only uses the basename (the final path component).
–R Reverses the sense of the patch script. In other words, patch behaves as if
the patch script shows the changes that make the new version into the old
version. You cannot use –R if the patchfile is in ed script format.
470 z/OS V1R9.0 UNIX System Services Command Reference
With –R, patch attempts to reverse each change recorded in the script
before applying the change. patch saves rejected differences in reversed
format (which means that you can check the rejections to see if patch
made the reversals correctly).