Approach guidance: grepping a string between multiple, slightly different delimiters - regex

Question

Assume a 3Kb file that looks like this:
PdId1 Unit 1
Model 3244
Status: OK
Advanced Status OK
-----------------------
No errors found
Statistics...
...<arbitrary length values here>...
PdId2 Unit 1
Model 3222
Status: OK
Advanced Status OK
-----------------------
Error Log is as follows <arbitrary values here>
PdId3 Unit 1
Model 3243
Status: OK
Advanced Status OK
-----------------------
No errors found
So we can be certain that PdIdn can reliably used as a delimiter, that it's always at the start of a line and that it's always trailing a numebr. I want to parse the text between the delimiter for "No errors found" and if the string is missing, grab the delimiter and the next four lines (grep -A4), glue on an error message and echo the result.
I've been wracking my brain about how to approach this. I'm most comfortable in Bash with grep, but I don't think grep's going to cut it here. I've looked at using split to break the file into pieces, but this seems messy and hard to clean up after processing is done. I started to try to write something in awk / sed, but I don't understand how to split on the delimiters, then go back and parse each result, then break off the next piece and parse that.
I apologise for the general nature of this question, but I'm stumped and could use some guidance.
Edit: Technically, PdId isn't a delimiter as much as it's the start of the next record. The number of records is arbitrary.
Edit: We've now got real world data to work with:
-------------------------------------------------------------------------------
PdId: 1
Model Number: WD 1000
Drive Type: SATA
SMART Status: Enable
SMART Health Status: OK
SCT Status Version: 3
SCT Version (vendor specific): 256 (0x0100)
SCT Support Level: 1
Device State: SMART Off-line Data Collection executing in background (4)
Current Temperature: 31 Celsius
Power Cycle Min/Max Temperature: 27/31 Celsius
Lifetime Min/Max Temperature: 16/41 Celsius
Under/Over Temperature Limit Count: 0/0
Self-test execution status: ( 0) The previous self-test routine
completed without error or no self-test
has ever been run.
has ever been run.
Error logging capability: (0x01) Error logging supported.
Short self-test routine
recommended polling time: ( 1) minutes.
Extended self-test routine
recommended polling time: ( 251) minutes.
SCT capabilities: (0x003d) SCT Status supported.
SCT Feature Control supported.
SCT Data Table supported.
SMART Self-test log structure revision number: 1
No self-tests have been logged. [To run self-tests, use: smartctl -t]
SMART Error Log Version: 1
No Errors Logged
SMART Attributes Data Structure revision number: 16
Vendor Specific SMART Attributes with Thresholds:
==============================================================================
ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED
WHEN_FAILED RAW_VALUE
==============================================================================
1 Raw_Read_Error_Rate 0x000b 100 100 016 Pre-fail Always
- 0
2 Throughput_Performance 0x0005 139 139 054 Pre-fail Offline
- 71
3 Spin_Up_Time 0x0007 169 169 024 Pre-fail Always
- 245 (Average 204)
4 Start_Stop_Count 0x0012 100 100 000 Old_age Always
- 746
5 Reallocated_Sector_Ct 0x0033 100 100 005 Pre-fail Always
- 0
7 Seek_Error_Rate 0x000b 100 100 067 Pre-fail Always
- 0
8 Seek_Time_Performance 0x0005 124 124 020 Pre-fail Offline
- 33
9 Power_On_Hours 0x0012 100 100 000 Old_age Always
- 1181
10 Spin_Retry_Count 0x0013 100 100 060 Pre-fail Always
- 0
12 Power_Cycle_Count 0x0032 100 100 000 Old_age Always
- 529
192 Power-Off_Retract_Count 0x0032 100 100 000 Old_age Always
- 751
193 Load_Cycle_Count 0x0012 100 100 000 Old_age Always
- 751
194 Temperature_Celsius 0x0002 193 193 000 Old_age Always
- 31 (Lifetime Min/Max 16/41)
196 Reallocated_Event_Count 0x0032 100 100 000 Old_age Always
- 0
197 Current_Pending_Sector 0x0022 100 100 000 Old_age Always
- 0
198 Offline_Uncorrectable 0x0008 100 100 000 Old_age Offline
- 0
199 UDMA_CRC_Error_Count 0x000a 200 200 000 Old_age Always
- 0
-------------------------------------------------------------------------------
PdId: 2
Model Number: WD 1000
Drive Type: SATA
SMART Status: Enable
SMART Health Status: OK
SCT Status Version: 3
SCT Version (vendor specific): 256 (0x0100)
SCT Support Level: 1
Device State: SMART Off-line Data Collection executing in background (4)
Current Temperature: 31 Celsius
Power Cycle Min/Max Temperature: 27/31 Celsius
Lifetime Min/Max Temperature: 16/40 Celsius
Under/Over Temperature Limit Count: 0/0
Self-test execution status: ( 0) The previous self-test routine
completed without error or no self-test
has ever been run.
has ever been run.
Error logging capability: (0x01) Error logging supported.
Short self-test routine
recommended polling time: ( 1) minutes.
Extended self-test routine
recommended polling time: ( 246) minutes.
SCT capabilities: (0x003d) SCT Status supported.
SCT Feature Control supported.
SCT Data Table supported.
SMART Self-test log structure revision number: 1
No self-tests have been logged. [To run self-tests, use: smartctl -t]
SMART Error Log Version: 1
No Errors Logged
SMART Attributes Data Structure revision number: 16
Vendor Specific SMART Attributes with Thresholds:
==============================================================================
ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED
WHEN_FAILED RAW_VALUE
==============================================================================
1 Raw_Read_Error_Rate 0x000b 100 100 016 Pre-fail Always
- 0
2 Throughput_Performance 0x0005 139 139 054 Pre-fail Offline
- 72
3 Spin_Up_Time 0x0007 171 171 024 Pre-fail Always
- 243 (Average 201)
4 Start_Stop_Count 0x0012 100 100 000 Old_age Always
- 746
5 Reallocated_Sector_Ct 0x0033 100 100 005 Pre-fail Always
- 0
7 Seek_Error_Rate 0x000b 100 100 067 Pre-fail Always
- 0
8 Seek_Time_Performance 0x0005 124 124 020 Pre-fail Offline
- 33
9 Power_On_Hours 0x0012 100 100 000 Old_age Always
- 1181
10 Spin_Retry_Count 0x0013 100 100 060 Pre-fail Always
- 0
12 Power_Cycle_Count 0x0032 100 100 000 Old_age Always
- 529
192 Power-Off_Retract_Count 0x0032 100 100 000 Old_age Always
- 749
193 Load_Cycle_Count 0x0012 100 100 000 Old_age Always
- 749
194 Temperature_Celsius 0x0002 193 193 000 Old_age Always
- 31 (Lifetime Min/Max 16/40)
196 Reallocated_Event_Count 0x0032 100 100 000 Old_age Always
- 0
197 Current_Pending_Sector 0x0022 100 100 000 Old_age Always
- 0
198 Offline_Uncorrectable 0x0008 100 100 000 Old_age Offline
- 0
199 UDMA_CRC_Error_Count 0x000a 200 200 000 Old_age Always
- 0
-------------------------------------------------------------------------------
PdId: 3
Model Number: WD 1000
Drive Type: SATA
SMART Status: Enable
SMART Health Status: OK
SCT Status Version: 3
SCT Version (vendor specific): 256 (0x0100)
SCT Support Level: 1
Device State: SMART Off-line Data Collection executing in background (4)
Current Temperature: 31 Celsius
Power Cycle Min/Max Temperature: 27/31 Celsius
Lifetime Min/Max Temperature: 17/40 Celsius
Under/Over Temperature Limit Count: 0/0
Self-test execution status: ( 0) The previous self-test routine
completed without error or no self-test
has ever been run.
has ever been run.
Error logging capability: (0x01) Error logging supported.
Short self-test routine
recommended polling time: ( 1) minutes.
Extended self-test routine
recommended polling time: ( 241) minutes.
SCT capabilities: (0x003d) SCT Status supported.
SCT Feature Control supported.
SCT Data Table supported.
SMART Self-test log structure revision number: 1
No self-tests have been logged. [To run self-tests, use: smartctl -t]
SMART Error Log Version: 1
No Errors Logged
SMART Attributes Data Structure revision number: 16
Vendor Specific SMART Attributes with Thresholds:
==============================================================================
ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED
WHEN_FAILED RAW_VALUE
==============================================================================
1 Raw_Read_Error_Rate 0x000b 100 100 016 Pre-fail Always
- 0
2 Throughput_Performance 0x0005 140 140 054 Pre-fail Offline
- 67
3 Spin_Up_Time 0x0007 170 170 024 Pre-fail Always
- 234 (Average 213)
4 Start_Stop_Count 0x0012 100 100 000 Old_age Always
- 748
5 Reallocated_Sector_Ct 0x0033 100 100 005 Pre-fail Always
- 0
7 Seek_Error_Rate 0x000b 100 100 067 Pre-fail Always
- 0
8 Seek_Time_Performance 0x0005 124 124 020 Pre-fail Offline
- 33
9 Power_On_Hours 0x0012 100 100 000 Old_age Always
- 1188
10 Spin_Retry_Count 0x0013 100 100 060 Pre-fail Always
- 0
12 Power_Cycle_Count 0x0032 100 100 000 Old_age Always
- 529
192 Power-Off_Retract_Count 0x0032 100 100 000 Old_age Always
- 750
193 Load_Cycle_Count 0x0012 100 100 000 Old_age Always
- 750
194 Temperature_Celsius 0x0002 193 193 000 Old_age Always
- 31 (Lifetime Min/Max 17/40)
196 Reallocated_Event_Count 0x0032 100 100 000 Old_age Always
- 0
197 Current_Pending_Sector 0x0022 100 100 000 Old_age Always
- 0
198 Offline_Uncorrectable 0x0008 100 100 000 Old_age Offline
- 0
199 UDMA_CRC_Error_Count 0x000a 200 200 000 Old_age Always
- 0
-------------------------------------------------------------------------------
PdId: 4
Model Number: WD 1000
Drive Type: SATA
SMART Status: Enable
SMART Health Status: OK
SCT Status Version: 3
SCT Version (vendor specific): 256 (0x0100)
SCT Support Level: 1
Device State: SMART Off-line Data Collection executing in background (4)
Current Temperature: 31 Celsius
Power Cycle Min/Max Temperature: 27/31 Celsius
Lifetime Min/Max Temperature: 15/40 Celsius
Under/Over Temperature Limit Count: 0/0
Self-test execution status: ( 0) The previous self-test routine
completed without error or no self-test
has ever been run.
has ever been run.
Error logging capability: (0x01) Error logging supported.
Short self-test routine
recommended polling time: ( 1) minutes.
Extended self-test routine
recommended polling time: ( 254) minutes.
SCT capabilities: (0x003d) SCT Status supported.
SCT Feature Control supported.
SCT Data Table supported.
SMART Self-test log structure revision number: 1
No self-tests have been logged. [To run self-tests, use: smartctl -t]
SMART Error Log Version: 1
ATA Error Count: 165 (device log contains only the most recent five errors)
CR = Command Register [HEX]
FR = Features Register [HEX]
SC = Sector Count Register [HEX]
SN = Sector Number Register [HEX]
CL = Cylinder Low Register [HEX]
CH = Cylinder High Register [HEX]
DH = Device/Head Register [HEX]
DC = Device Command Register [HEX]
ER = Error register [HEX]
ST = Status register [HEX]
Powered_Up_Time is measured from power on, and printed as
DDd+hh:mm:SS.sss where DD=days, hh=hours, mm=minutes,
SS=sec, and sss=millisec. It "wraps" after 49.710 days.
Error 165 occurred at disk power-on lifetime: 1176 hours (49 days + 0 hours)
When the command that caused the error occurred,
the device was active or idle.
After command completion occurred, registers were:
ER ST SC SN CL CH DH
-- -- -- -- -- -- --
84 51 50 b0 ee 81 0d
Commands leading to the command that caused the error were:
CR FR SC SN CL CH DH DC Powered_Up_Time Command/Feature_Name
-- -- -- -- -- -- -- -- ---------------- --------------------
61 80 a8 80 ee 81 40 00 18:38:48.276 WRITE FPDMA QUEUED
61 80 a0 00 ee 81 40 00 18:38:48.276 WRITE FPDMA QUEUED
61 80 98 80 ed 81 40 00 18:38:48.276 WRITE FPDMA QUEUED
61 80 90 00 ed 81 40 00 18:38:48.276 WRITE FPDMA QUEUED
61 80 88 80 ec 81 40 00 18:38:48.275 WRITE FPDMA QUEUED
Error 164 occurred at disk power-on lifetime: 1175 hours (48 days + 23 hours)
When the command that caused the error occurred,
the device was active or idle.
After command completion occurred, registers were:
ER ST SC SN CL CH DH
-- -- -- -- -- -- --
84 51 10 f0 ad 6b 0d Error: ICRC, ABRT 16 sectors at LBA = 0x0d6badf0 = 225160688
Commands leading to the command that caused the error were:
CR FR SC SN CL CH DH DC Powered_Up_Time Command/Feature_Name
-- -- -- -- -- -- -- -- ---------------- --------------------
35 00 80 80 ad 6b 40 00 18:36:07.145 WRITE DMA EXT
35 00 80 00 ae 6b 40 00 18:36:07.144 WRITE DMA EXT
35 00 80 00 ad 6b 40 00 18:36:07.144 WRITE DMA EXT
35 00 80 80 ab 6b 40 00 18:36:07.139 WRITE DMA EXT
35 00 80 00 ab 6b 40 00 18:36:07.139 WRITE DMA EXT
Error 163 occurred at disk power-on lifetime: 1175 hours (48 days + 23 hours)
When the command that caused the error occurred,
the device was active or idle.
After command completion occurred, registers were:
ER ST SC SN CL CH DH
-- -- -- -- -- -- --
84 51 f0 10 5e 5d 0d Error: ICRC, ABRT 240 sectors at LBA = 0x0d5d5e10 = 224222736
Commands leading to the command that caused the error were:
CR FR SC SN CL CH DH DC Powered_Up_Time Command/Feature_Name
-- -- -- -- -- -- -- -- ---------------- --------------------
35 00 80 80 5b 5d 40 00 18:35:47.982 WRITE DMA EXT
35 00 80 80 5a 5d 40 00 18:35:47.982 WRITE DMA EXT
35 00 80 00 59 5d 40 00 18:35:47.981 WRITE DMA EXT
35 00 00 00 58 5d 40 00 18:35:47.979 WRITE DMA EXT
35 00 30 00 36 5d 40 00 18:35:47.960 WRITE DMA EXT
Error 162 occurred at disk power-on lifetime: 1175 hours (48 days + 23 hours)
When the command that caused the error occurred,
the device was active or idle.
After command completion occurred, registers were:
ER ST SC SN CL CH DH
-- -- -- -- -- -- --
84 51 20 e0 33 19 0d
Commands leading to the command that caused the error were:
CR FR SC SN CL CH DH DC Powered_Up_Time Command/Feature_Name
-- -- -- -- -- -- -- -- ---------------- --------------------
61 80 30 00 33 19 40 00 18:34:50.672 WRITE FPDMA QUEUED
61 80 28 80 33 19 40 00 18:34:50.671 WRITE FPDMA QUEUED
61 80 20 00 34 19 40 00 18:34:50.671 WRITE FPDMA QUEUED
61 00 18 80 34 19 40 00 18:34:50.671 WRITE FPDMA QUEUED
61 80 10 80 36 19 40 00 18:34:50.670 WRITE FPDMA QUEUED
Error 161 occurred at disk power-on lifetime: 1133 hours (47 days + 5 hours)
When the command that caused the error occurred,
the device was active or idle.
After command completion occurred, registers were:
ER ST SC SN CL CH DH
-- -- -- -- -- -- --
84 51 d0 30 dd 3b 0a
Commands leading to the command that caused the error were:
CR FR SC SN CL CH DH DC Powered_Up_Time Command/Feature_Name
-- -- -- -- -- -- -- -- ---------------- --------------------
61 80 38 80 dc 3b 40 00 06:26:51.414 WRITE FPDMA QUEUED
61 80 30 00 df 3b 40 00 06:26:51.413 WRITE FPDMA QUEUED
61 80 28 80 df 3b 40 00 06:26:51.413 WRITE FPDMA QUEUED
61 80 20 00 da 3b 40 00 06:26:51.402 WRITE FPDMA QUEUED
61 80 18 80 da 3b 40 00 06:26:51.402 WRITE FPDMA QUEUED
SMART Attributes Data Structure revision number: 16
Vendor Specific SMART Attributes with Thresholds:
==============================================================================
ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED
WHEN_FAILED RAW_VALUE
==============================================================================
1 Raw_Read_Error_Rate 0x000b 100 100 016 Pre-fail Always
- 0
2 Throughput_Performance 0x0005 139 139 054 Pre-fail Offline
- 73
3 Spin_Up_Time 0x0007 170 170 024 Pre-fail Always
- 234 (Average 212)
4 Start_Stop_Count 0x0012 100 100 000 Old_age Always
- 747
5 Reallocated_Sector_Ct 0x0033 100 100 005 Pre-fail Always
- 0
7 Seek_Error_Rate 0x000b 100 100 067 Pre-fail Always
- 0
8 Seek_Time_Performance 0x0005 124 124 020 Pre-fail Offline
- 33
9 Power_On_Hours 0x0012 100 100 000 Old_age Always
- 1187
10 Spin_Retry_Count 0x0013 100 100 060 Pre-fail Always
- 0
12 Power_Cycle_Count 0x0032 100 100 000 Old_age Always
- 529
192 Power-Off_Retract_Count 0x0032 100 100 000 Old_age Always
- 748
193 Load_Cycle_Count 0x0012 100 100 000 Old_age Always
- 748
194 Temperature_Celsius 0x0002 200 200 000 Old_age Always
- 30 (Lifetime Min/Max 15/40)
196 Reallocated_Event_Count 0x0032 100 100 000 Old_age Always
- 0
197 Current_Pending_Sector 0x0022 100 100 000 Old_age Always
- 0
198 Offline_Uncorrectable 0x0008 100 100 000 Old_age Offline
- 0
199 UDMA_CRC_Error_Count 0x000a 200 200 000 Old_age Always
- 165
-------------------------------------------------------------------------------
PdId: 5
Model Number: WD 1000
Drive Type: SATA
SMART Status: Enable
SMART Health Status: OK
SCT Status Version: 3
SCT Version (vendor specific): 256 (0x0100)
SCT Support Level: 1
Device State: SMART Off-line Data Collection executing in background (4)
Current Temperature: 31 Celsius
Power Cycle Min/Max Temperature: 27/31 Celsius
Lifetime Min/Max Temperature: 17/40 Celsius
Under/Over Temperature Limit Count: 0/0
Self-test execution status: ( 0) The previous self-test routine
completed without error or no self-test
has ever been run.
has ever been run.
Error logging capability: (0x01) Error logging supported.
Short self-test routine
recommended polling time: ( 1) minutes.
Extended self-test routine
recommended polling time: ( 251) minutes.
SCT capabilities: (0x003d) SCT Status supported.
SCT Feature Control supported.
SCT Data Table supported.
SMART Self-test log structure revision number: 1
No self-tests have been logged. [To run self-tests, use: smartctl -t]
SMART Error Log Version: 1
No Errors Logged
SMART Attributes Data Structure revision number: 16
Vendor Specific SMART Attributes with Thresholds:
==============================================================================
ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED
WHEN_FAILED RAW_VALUE
==============================================================================
1 Raw_Read_Error_Rate 0x000b 100 100 016 Pre-fail Always
- 0
2 Throughput_Performance 0x0005 140 140 054 Pre-fail Offline
- 68
3 Spin_Up_Time 0x0007 133 133 024 Pre-fail Always
- 289 (Average 282)
4 Start_Stop_Count 0x0012 100 100 000 Old_age Always
- 748
5 Reallocated_Sector_Ct 0x0033 100 100 005 Pre-fail Always
- 0
7 Seek_Error_Rate 0x000b 100 100 067 Pre-fail Always
- 0
8 Seek_Time_Performance 0x0005 124 124 020 Pre-fail Offline
- 33
9 Power_On_Hours 0x0012 100 100 000 Old_age Always
- 1186
10 Spin_Retry_Count 0x0013 100 100 060 Pre-fail Always
- 0
12 Power_Cycle_Count 0x0032 100 100 000 Old_age Always
- 529
192 Power-Off_Retract_Count 0x0032 100 100 000 Old_age Always
- 750
193 Load_Cycle_Count 0x0012 100 100 000 Old_age Always
- 750
194 Temperature_Celsius 0x0002 193 193 000 Old_age Always
- 31 (Lifetime Min/Max 17/40)
196 Reallocated_Event_Count 0x0032 100 100 000 Old_age Always
- 0
197 Current_Pending_Sector 0x0022 100 100 000 Old_age Always
- 0
198 Offline_Uncorrectable 0x0008 100 100 000 Old_age Offline
- 0
199 UDMA_CRC_Error_Count 0x000a 200 200 000 Old_age Always
- 0
-------------------------------------------------------------------------------
PdId: 6
Model Number: WD 1000
Drive Type: SATA
SMART Status: Enable
SMART Health Status: OK
SCT Status Version: 3
SCT Version (vendor specific): 256 (0x0100)
SCT Support Level: 1
Device State: SMART Off-line Data Collection executing in background (4)
Current Temperature: 30 Celsius
Power Cycle Min/Max Temperature: 27/30 Celsius
Lifetime Min/Max Temperature: 17/40 Celsius
Under/Over Temperature Limit Count: 0/0
Self-test execution status: ( 0) The previous self-test routine
completed without error or no self-test
has ever been run.
has ever been run.
Error logging capability: (0x01) Error logging supported.
Short self-test routine
recommended polling time: ( 1) minutes.
Extended self-test routine
recommended polling time: ( 243) minutes.
SCT capabilities: (0x003d) SCT Status supported.
SCT Feature Control supported.
SCT Data Table supported.
SMART Self-test log structure revision number: 1
No self-tests have been logged. [To run self-tests, use: smartctl -t]
SMART Error Log Version: 1
No Errors Logged
SMART Attributes Data Structure revision number: 16
Vendor Specific SMART Attributes with Thresholds:
==============================================================================
ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED
WHEN_FAILED RAW_VALUE
==============================================================================
1 Raw_Read_Error_Rate 0x000b 100 100 016 Pre-fail Always
- 0
2 Throughput_Performance 0x0005 139 139 054 Pre-fail Offline
- 72
3 Spin_Up_Time 0x0007 130 130 024 Pre-fail Always
- 294 (Average 287)
4 Start_Stop_Count 0x0012 100 100 000 Old_age Always
- 748
5 Reallocated_Sector_Ct 0x0033 100 100 005 Pre-fail Always
- 0
7 Seek_Error_Rate 0x000b 100 100 067 Pre-fail Always
- 0
8 Seek_Time_Performance 0x0005 124 124 020 Pre-fail Offline
- 33
9 Power_On_Hours 0x0012 100 100 000 Old_age Always
- 1186
10 Spin_Retry_Count 0x0013 100 100 060 Pre-fail Always
- 0
12 Power_Cycle_Count 0x0032 100 100 000 Old_age Always
- 529
192 Power-Off_Retract_Count 0x0032 100 100 000 Old_age Always
- 751
193 Load_Cycle_Count 0x0012 100 100 000 Old_age Always
- 751
194 Temperature_Celsius 0x0002 200 200 000 Old_age Always
- 30 (Lifetime Min/Max 17/40)
196 Reallocated_Event_Count 0x0032 100 100 000 Old_age Always
- 0
197 Current_Pending_Sector 0x0022 100 100 000 Old_age Always
- 0
198 Offline_Uncorrectable 0x0008 100 100 000 Old_age Offline
- 0
199 UDMA_CRC_Error_Count 0x000a 200 200 000 Old_age Always
- 0

Answer 1

Read line by line, collect into an accumulator the lines you want, print the accumulated lines when you see the trigger message (otherwise just start over and overwrite the accumulator when you see the start of the next record).
We use a as the accumulator and the helper variable n to keep track of how many lines to accumulate:
awk '/^PdId: [1-9][0-9]*/ { a=$0; n=4; next }
n { --n; a=a "\n" $ 0; next }
/No Errors Logged/ { print a }' file

Answer 2

Put the following into an executable awk file:
#!/usr/bin/awk -f
BEGIN {no_errs=1}
c > 0 {a[c++]=$0}
/^----------/ {
logAnyErrors()
ata_err=""
no_errs=0
c=1
delete a
}
/^No Errors Logged/ {no_errs=1}
/^ATA Error Count:/ {ata_err=$0}
function logAnyErrors() {
if( ata_err!="" || !no_errs) {
for(i=1;i<=5;i++) print a[i]
if( ata_err!="" ) print ata_err
print "--" # separator
}
}
END { logAnyErrors() }
Your data actually has a delimiter of "^------------------"... before each PdId.
The breakdown:
Start off assuming no errors in the BEGIN block
add each record line to an array called a with a line counter c
Whenever a new record section occurs call logAnyErrors() and reset counters
In logAnyErrors(), if there are ATA or other errors, print the first 5 lines of the record and a delimiter similar to what I think grep -A4 would output.
At the end, log any errors in the final record.
When I put this into an executable file called awko and run like awko data I get the following output:
PdId: 4
Model Number: WD 1000
Drive Type: SATA
SMART Status: Enable
SMART Health Status: OK
ATA Error Count: 165 (device log contains only the most recent five errors)
----------------
It's possible that the delete a line is non-conforming for some awks. Works on my mac. It's not necessary unless you want to print out more information in each block when errors occur(since the first 5 lines will always be overwritten).