-pnum or --strip=num
Strip the smallest prefix containing num leading slashes from each file name found in the patch
file. A sequence of one or more adjacent slashes is counted as a single slash. This controls how
file names found in the patch file are treated, in case you keep your files in a different direc-
tory than the person who sent out the patch. For example, supposing the file name in the patch
file was
/u/howard/src/blurfl/blurfl.c
setting -p0 gives the entire file name unmodified, -p1 gives
u/howard/src/blurfl/blurfl.c
without the leading slash, -p4 gives
blurfl/blurfl.c
and not specifying -p at all just gives you blurfl.c. Whatever you end up with is looked for
either in the current directory, or the directory specified by the -d option.