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Shell Programming and Scripting
Can sed be used to insert data at specific column?
Post 302406130 by kurumi on Monday 22nd of March 2010 05:08:31 AM
03-22-2010
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I need to insert field(which is need to taken from previous line's first field) in first column if its blank. I had tried using sed but not find the way. Detail input and output file as below.
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Source Code of the original script is down below please run the script and try to solve this problem
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1
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1
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LEARN ABOUT DEBIAN
glwaitsync
GLWAITSYNC(3G) [FIXME: manual] GLWAITSYNC(3G) NAME
glWaitSync - instruct the GL server to block until the specified sync object becomes signaled C SPECIFICATION
void glWaitSync(GLsync sync, GLbitfield flags, GLuint64 timeout); PARAMETERS
sync Specifies the sync object whose status to wait on. flags A bitfield controlling the command flushing behavior. flags may be zero. timeout Specifies the timeout that the server should wait before continuing. timeout must be GL_TIMEOUT_IGNORED. DESCRIPTION
glWaitSync causes the GL server to block and wait until sync becomes signaled. sync is the name of an existing sync object upon which to wait. flags and timeout are currently not used and must be set to zero and the special value GL_TIMEOUT_IGNORED, respectively[1]. glWaitSync will always wait no longer than an implementation-dependent timeout. The duration of this timeout in nanoseconds may be queried by calling glGet() with the parameter GL_MAX_SERVER_WAIT_TIMEOUT. There is currently no way to determine whether glWaitSync unblocked because the timeout expired or because the sync object being waited on was signaled. If an error occurs, glWaitSync does not cause the GL server to block. NOTES
glWaitSync is available only if the GL version is 3.2 or higher. ERRORS
GL_INVALID_OPERATION is generated if sync is not the name of a sync object. GL_INVALID_VALUE is generated if flags is not zero. GL_INVALID_VALUE is generated if timeout is not GL_TIMEOUT_IGNORED. SEE ALSO
glFenceSync(), glClientWaitSync() COPYRIGHT
Copyright (C) 2010 Khronos Group. This material may be distributed subject to the terms and conditions set forth in the Open Publication License, v 1.0, 8 June 1999. http://opencontent.org/openpub/. NOTES
1. flags and timeout are placeholders for anticipated future extensions of sync object capabilities. They must have these reserved values in order that existing code calling glWaitSync operate properly in the presence of such extensions. [FIXME: source] 05/30/2012 GLWAITSYNC(3G)