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Perl in a Nutshell, 2nd Edition
book

Perl in a Nutshell, 2nd Edition

by Nathan Patwardhan, Ellen Siever, Stephen Spainhour
June 2002
Beginner content levelBeginner
759 pages
80h 42m
English
O'Reilly Media, Inc.
Content preview from Perl in a Nutshell, 2nd Edition

Name

sysopen

Synopsis

sysopen filehandle, filename, mode, [perms]

Opens the file given by filename and associates it with filehandle. This function calls open(2) with the parameters filename, mode, and perms.

The possible values and flag bits of the mode parameter are system-dependent; they are available via the Fcntl library module. However, for historical reasons, some values are universal: 0 means read-only, 1 means write-only, and 2 means read/write.

If the file named by filename does not exist, and sysopen creates it (typically because mode includes the O_CREAT flag), then the value of perms specifies the permissions of the newly created file. If perms is omitted, the default value is 0666, which allows read and write for all. This default is reasonable. See umask .

The FileHandle module provides a more object-oriented approach to sysopen. See also open .

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Publisher Resources

ISBN: 0596002416Errata Page