bash - parsing a logfile for error messages -

bash - parsing a logfile for error messages -

i'm trying write bash command able set variable (exitstatus) based on scanning of log file specific pattern.

inside log file, many error messages can present. problem 1 error message written on 2 lines. example:

error 77: invalid record detected @ position 88332: bad alignment detected [ird-21] error 77: invalid record detected @ position 88333: bad alignment detected [ird-21] error 77: invalid record detected @ position 88334: bad alignment detected [ird-21] error 77: invalid record detected @ position 88335: bad alignment detected [ird-21] error 88: bad format in string @ record 287 [syn-44] error 88: bad format in string @ record 288 [syn-44] error 88: bad format in string @ record 289 [syn-44] error 73: invalid table spec or stub @ record 1022 [invt-33]

if log file contains messages related error 77 [ird-21], or if there no errors @ it's fine, exitstatus remains 0. otherwise, exitstatus set 2.

i've been trying find , grep fact error message can spread on 2 lines destroying efforts. put, i'd inquire shell: "hey, bash, log file contains other errors ird-21?, if so, raise error".

also, have no command on log file format, comes our client.

any ideas on how this?

if want know if there's word error followed other 77, can (with gnu grep):

exitstatus=$(grep -qp 'error (?!77)' sample.log && echo 2 || echo 0)

bash grep find