#2 pgrep does not recognise "\b"

[J Alan Brogan]

Using proctools version 0.4pre1 on OSX (10.7.5)

What I did (running as root):

$ pgrep -fl cron
    60 /usr/sbin/cron
$ pgrep -fl "cron\b"
$ ps -ef | grep -v grep | grep -E "cron"
    0    60     1   0 12:32pm ??         0:00.01 /usr/sbin/cron
$ ps -ef | grep -v grep | grep -E "cron\b"
    0    60     1   0 12:32pm ??         0:00.01 /usr/sbin/cron

What I expected:

pgrep should have found cron on the second invocation, as the "\b" should indicate end-of-word, which should be found, as it is by the second grep invocation

[Wataru Ashihara]

Your grep seems to use ENHANCED FEATURES descibed in re_format(7), whereas proctools use extended regular expressions defined in POSIX.
Using ENHANCED FEATURES is easy (simply replace REG_EXTENDED with REG_ENHANCED in regcomp()) but may have a portability issue.