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Shell Programming and Scripting
Grepping file and returning passed variable if the value does not exist in file at all.
Post 302517297 by cambridge on Tuesday 26th of April 2011 11:01:58 AM
04-26-2011
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LEARN ABOUT REDHAT
chdir
CHDIR(2) Linux Programmer's Manual CHDIR(2) NAME
chdir, fchdir - change working directory SYNOPSIS
#include <unistd.h> int chdir(const char *path); int fchdir(int fd); DESCRIPTION
chdir changes the current directory to that specified in path. fchdir is identical to chdir, only that the directory is given as an open file descriptor. RETURN VALUE
On success, zero is returned. On error, -1 is returned, and errno is set appropriately. ERRORS
Depending on the file system, other errors can be returned. The more general errors for chdir are listed below: EFAULT path points outside your accessible address space. ENAMETOOLONG path is too long. ENOENT The file does not exist. ENOMEM Insufficient kernel memory was available. ENOTDIR A component of path is not a directory. EACCES Search permission is denied on a component of path. ELOOP Too many symbolic links were encountered in resolving path. EIO An I/O error occurred. The general errors for fchdir are listed below: EBADF fd is not a valid file descriptor. EACCES Search permission was denied on the directory open on fd. NOTES
The prototype for fchdir is only available if _BSD_SOURCE is defined (either explicitly, or implicitly, by not defining _POSIX_SOURCE or compiling with the -ansi flag). CONFORMING TO
The chdir call is compatible with SVr4, SVID, POSIX, X/OPEN, 4.4BSD. SVr4 documents additional EINTR, ENOLINK, and EMULTIHOP error condi- tions but has no ENOMEM. POSIX.1 does not have ENOMEM or ELOOP error conditions. X/OPEN does not have EFAULT, ENOMEM or EIO error condi- tions. The fchdir call is compatible with SVr4, 4.4BSD and X/OPEN. SVr4 documents additional EIO, EINTR, and ENOLINK error conditions. X/OPEN documents additional EINTR and EIO error conditions. SEE ALSO
getcwd(3), chroot(2) Linux 2.0.30 1997-08-21 CHDIR(2)