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Full Discussion: file descriptor count
Top Forums Shell Programming and Scripting file descriptor count Post 302561492 by Skrynesaver on Tuesday 4th of October 2011 09:43:13 AM
Old 10-04-2011
All the command is doing is counting the number of lines which begin " nnn: " (ie start of file descriptor record). Are you sure the number of open files is a constant?

Note in the records you posted above that 21 and 22 are not active FDs for the process. Given FD 0 is the starting point, if all the other potential values are used, then you have 22 FDs for the process.
 

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ELF_END(3)						   BSD Library Functions Manual 						ELF_END(3)

NAME
elf_end -- release an ELF descriptor LIBRARY
ELF Access Library (libelf, -lelf) SYNOPSIS
#include <libelf.h> int elf_end(Elf *elf); DESCRIPTION
Function elf_end() is used to release the resources associated with an ELF descriptor pointed to by argument elf. This descriptor must have been allocated by a previous call to elf_begin(3) or elf_memory(3). For programming convenience, a NULL value is permitted for argument elf. A call to elf_end() decrements the activation count for descriptor elf by one. The resources associated with the descriptor are only released with its activation count goes to zero. Once function elf_end() returns zero, the ELF descriptor elf will no longer be valid and should not be used further. RETURN VALUES
Function elf_end() returns the current value of the ELF descriptor elf's activation count, or zero if argument elf was NULL. SEE ALSO
elf(3), elf_begin(3), elf_memory(3), gelf(3) BSD
June 29, 2006 BSD
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