MPE/iX Shell and Utilities Reference Manual, Vol 2

patch(1) MPE/iX Shell and Utilities patch(1)

–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.

With –R, patch attempts to reverse each change recorded in the script before apply-

ing 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).

–r rejectﬁle

records rejects in the ﬁle rejectﬁle, instead of the default reject ﬁle name. By default,

the reject ﬁle has the same name as the original ﬁle, plus the sufﬁx .rej.

–s tells patch to remain silent until an error occurs. Normally, patch writes informa-

tion on the results of the patching process to standard error (stderr).

–v displays the version number of patch, then exits.

DIAGNOSTICS

patch may return the following status values:

0 successful completion.

1 there were one or more rejects.

>1 an error occurred.

Messages

Message: Argument to -D not an identifier

Cause: You speciﬁed an argument to the –D option that was not a valid C preprocessor

identiﬁer.

Action: Make sure that the symbol provided is a valid C identiﬁer, and try again.

Message: Can’t cd to dir.

Cause: patch was unable to change the current directory to the directory speciﬁed

with the –d option.

Action: Make sure that the speciﬁed directory name exists, was named properly, and

that you have appropriate permissions.

Message: Can’t open file ﬁlename

Cause: patch was unable to open the ﬁle that you wanted to patch.

Action: Make sure that ﬁlename exists, was named properly, and that you have appro-

priate permissions.

Commands and Utilities 1-411