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SPAWN exit status different from shell exit status. [message #88872]

Mon, 30 June 2014 07:04

Paul Van Delst[1]
Messages: 1157
Registered: April 2002

Senior Member

Hello,

I'm trying to run a compiled executable within IDL.

When I run the exe in a regular shell I get the following:

$ myexe

Program received signal SIGSEGV: Segmentation fault - invalid memory
reference.

Backtrace for this error:
#0 0x7FD97E7ADA77
#1 0x7FD97E7AE07E
#2 0x3000C3299F
#3 0x45EBBB in sub1_
#4 0x47688D in sub2_
#5 0x409A9F in sub3_
#6 0x42BABA in MAIN__ at myprog.f90:0
Segmentation fault (core dumped)

If I inspect the exit value I see:

$ echo $?
139

Now, if I do the same thing inside an IDL SPAWN command I get the following:

IDL> SPAWN, 'myexe', stdout, stderr, EXIT_STATUS = exit_stat

IDL> print, exit_stat
0

IDL> help, stderr
STDERR STRING = Array[11]

IDL> print, stderr, format='(a)'

Program received signal SIGSEGV: Segmentation fault - invalid memory
reference.

Backtrace for this error:
#0 0x7F39A545DA77
#1 0x7F39A545E07E
#2 0x3000C3299F
#3 0x45EBBB in sub1_
#4 0x47688D in sub2_
#5 0x409A9F in sub3_
#6 0x42BABA in MAIN__ at myprog.f90:0

So it's still failing but the exit_status is always 0 (i.e. successful)

I've tried the command with /SH and /NOSHELL and get the same result.

Does anyone have any idea why SPAWN is not setting the EXIT_STATUS
correctly?

cheers,

paulv

p.s.
IDL> print, !VERSION
{ x86_64 linux unix linux 8.3 Nov 15 2013 64 64}

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[Message index]

		SPAWN exit status different from shell exit status. By: Paul Van Delst[1] on Mon, 30 June 2014 07:04
		Re: SPAWN exit status different from shell exit status. By: lecacheux.alain on Mon, 30 June 2014 09:31
		Re: SPAWN exit status different from shell exit status. By: Craig Markwardt on Tue, 01 July 2014 11:49

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