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Top Forums Shell Programming and Scripting How get program name that produced an IO error redirected to a LOG in a nohup command? Post 302765231 by enriquegm82 on Friday 1st of February 2013 04:59:16 PM
Old 02-01-2013
Question How get program name that produced an IO error redirected to a LOG in a nohup command?

Good afternoon,

I'm have program that executes in background another programs. The main program would be programA and the programs executed by the main one, would be program1a, program1b and program1c.

I need the programs to continue the execution no matter if the shell connection is lost, so I'm using the NOHUP command.

However, each program has its own LOG file, like follows.-

programA --> logfileA.txt
program1a --> logfile1a.txt
program1b --> logfile1b.txt
program1c --> logfile1c.txt

When an error occurs in one of the child programs, the error message is displayed in the LOG file corresponding to the main program.

Example.-

1) The programA is invoked from another routine.-

Code:
nohup nice -10 programA 2>&1 > logfileA.txt

2) Inside programA it invokes the other 3 programs.-

Code:
nohup nice -10 program1a 2>&1 > logfile1a.txt
nohup nice -10 program1b 2>&1 > logfile1b.txt
nohup nice -10 program1c 2>&1 > logfile1c.txt

When an error occurs, it is showed or displayed in the logfileA.txt, instead of being displayed in the logfile1a.txt or logfile1b.txt or logfile1c.txt

How can I know what program produced the error that it is displayed in the main program's LOG file?

Thanks in advance for your responses.

Last edited by radoulov; 04-03-2014 at 12:23 PM..
 

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NOHUP(1)						    BSD General Commands Manual 						  NOHUP(1)

NAME
nohup -- invoke a utility immune to hangups SYNOPSIS
nohup [--] utility [arguments] DESCRIPTION
The nohup utility invokes utility with its arguments and at this time sets the signal SIGHUP to be ignored. If the standard output is a ter- minal, the standard output is appended to the file nohup.out in the current directory. If standard error is a terminal, it is directed to the same place as the standard output. Some shells may provide a builtin nohup command which is similar or identical to this utility. Consult the builtin(1) manual page. ENVIRONMENT
The following variables are utilized by nohup: HOME If the output file nohup.out cannot be created in the current directory, the nohup utility uses the directory named by HOME to create the file. PATH Used to locate the requested utility if the name contains no '/' characters. DIAGNOSTICS
The nohup utility exits with one of the following values: 126 The utility was found, but could not be invoked. 127 The utility could not be found or an error occurred in nohup. Otherwise, the exit status of nohup will be that of utility. SEE ALSO
builtin(1), csh(1), signal(3) STANDARDS
The nohup utility is expected to be IEEE Std 1003.2 (``POSIX.2'') compatible. BUGS
Two or more instances of nohup can append to the same file, which makes for a confusing output. BSD
July 19, 2001 BSD
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