System call failed with 127 .. after 500 times when called in loop Post: 302588412

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Top Forums UNIX for Advanced & Expert Users System call failed with 127 .. after 500 times when called in loop Post 302588412 by binnyjeshan on Monday 9th of January 2012 01:27:36 AM

01-09-2012

Registered User

System call failed with 127 .. after 500 times when called in loop

Hi Experts,

I have a code like this.

=====

Code:

#include.... 

int main()
{ 
  int count = 0;
  while(1){
    
    printf("\n Interation number is: %d \n ",count);
    rv = system(" test.sh > log.txt " );

    if (-1 == rv)
    {
        printf("Could not generate static log: error calling system()");
    }
    else if (WEXITSTATUS(rv) != 0)
    {
        printf("\nProblem generating static log: shell script returned %d \n", WEXITSTATUS(rv) );
        
    }
     count ++;
    .
    .
    .
    //some other code comes here
    .
    .

  } //while ends
}

Content of the test.sh is.

Code:

#!/bin/sh

echo "HIIIII"
ls -lrt
ps -ef

Problem is that, after this code is looped for 500+ times, the error happens
Problem generating static log: shell script returned 127

In the meantime when the error is happening, if you execure this manually on the shell, i.e. test.pl > log.txt .. it works fine..
ONLY WHEN IT HAPPENS THROUGH SYSTEM CALL, it fails

after failing for 30 times, it resumes again successfully.

I have tried to replace system() with popen(), but that also gives same behavior.

What would be the reason? Is it that the fork() ed child processes by these two functions (internally) did not free the resources?
did /bin/sh fail to launch? Did the system have no memory to fork?(if so, why did it resume after 30 continuous failures?

I am looking for your suggestions and comments.

Thanks for the help and your time,
Binny Jeshan,
Senior Software Designer,
Aricent.

Last edited by binnyjeshan; 01-20-2012 at 03:04 AM.. Reason: typing error rectified; please use code tags

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LEARN ABOUT OSF1

xmscrollvisible

XmScrollVisible(3X)													       XmScrollVisible(3X)

NAME

       XmScrollVisible - A ScrolledWindow function that makes an invisible descendant of a ScrolledWindow work area visible

SYNOPSIS

       #include <Xm/ScrolledW.h>

       void XmScrollVisible (scrollw_widget, widget, left_right_margin, top_bottom_margin)
	       Widget scrollw_widget;
	       Widget widget;
	       Dimension left_right_margin;
	       Dimension top_bottom_margin;

DESCRIPTION

       XmScrollVisible	makes  an  obscured or partially obscured widget or gadget descendant of a ScrolledWindow work area visible.  The function
       repositions the work area and sets the specified margins between the widget and the nearest viewport boundary.  The widget's location rela-
       tive to the viewport determines whether one or both of the margins must be adjusted.  This function requires that the XmNscrollingPolicy of
       the ScrolledWindow widget be set to XmAUTOMATIC.  Specifies the ID of the ScrolledWindow widget whose work area window contains an obscured
       descendant.   Specifies	the  ID of the widget to be made visible.  Specifies the margin to establish between the left or right edge of the
       widget and the associated edge of the viewport. This margin is established only if the widget must be moved horizontally to make  it  visi-
       ble.   Specifies  the margin to establish between the top or bottom edge of the widget and the associated edge of the viewport. This margin
       is established only if the widget must be moved vertically to make it visible.

       For a complete definition of ScrolledWindow and its associated resources, see XmScrolledWindow(3X).

SEE ALSO

       XmScrolledWindow(3X)

															       XmScrollVisible(3X)

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