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Full Discussion: command to extract sub-string out of file names
Top Forums UNIX for Dummies Questions & Answers command to extract sub-string out of file names Post 302518591 by lv99 on Saturday 30th of April 2011 11:40:40 AM
Old 04-30-2011
Quote:
Originally Posted by ctsgnb
Code:
# cat tst
DEPT_CHEM101LEC_D_20110301.DAT
DEPT_CHEM101LAB_D_20110301.DAT
DEPT_BIO105LEC_D_20110325.DAT
DEPT_MUSICLAB_D_20110327.DAT
DEPT_BIO105LAB_D_20110325.DAT
DEPT_CSC308LEC_D_20110327.DAT
DEPT_CSC308LAB_D_20110327.DAT

Code:
# while read a; do t=${a%???_*_*}; echo "${t#*_}"; done <tst
CHEM101
CHEM101
BIO105
MUSIC
BIO105
CSC308
CSC308

Code:
# sed 's/^[^_]*_//;s/..._.*//' tst
CHEM101
CHEM101
BIO105
MUSIC
BIO105
CSC308
CSC308

thanks, eliminate sub-string with matching pattern will only work when the number of characters are not change. I end up using multiple sed to remove know keyword after the classes since there are more keywords than just LEC and LAB as show in sample. ex: LEC, LAB, ELECTIVE, MAJOR...
 

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LEARN ABOUT SUNOS

dat_get_handle_type

dat_get_handle_type(3DAT)			     Direct Access Transport Library Functions				 dat_get_handle_type(3DAT)

NAME

       dat_get_handle_type - get handle type

SYNOPSIS

       cc [ flag... ] file... -ldat [ library... ]
       #include <dat/udat.h>

       DAT_RETURN
	   dat_get_handle_typet (
	   IN	 DAT_HANDLE	   dat_handle,
	   OUT	 DAT_HANDLE_TYPE   *handle_type
	   )

PARAMETERS

       dat_handle      Handle for a DAT Object.

       handle_type     Type of the handle of dat_handle.

DESCRIPTION

       The dat_get_handle_type() function allows the Consumer to discover the type of a DAT Object using its handle.

       The  dat_handle	can  be  one  of  the following handle types: DAT_IA_HANDLE, DAT_EP_HANDLE, DAT_EVD_HANDLE, DAT_CR_HANDLE, DAT_RSP_HANDLE,
       DAT_PSP_HANDLE, DAT_PZ_HANDLE, DAT_LMR_HANDLE, or DAT_RMR_HANDLE.

       The handle_type is one of the following handle  types:  DAT_HANDLE_TYPE_IA,  DAT_HANDLE_TYPE_EP,  DAT_HANDLE_TYPE_EVD,  DAT_HANDLE_TYPE_CR,
       DAT_HANDLE_TYPE_PSP, DAT_HANDLE_TYPE_RSP, DAT_HANDLE_TYPE_PZ, DAT_HANDLE_TYPE_LMR, DAT_HANDLE_TYPE_RMR, or DAT_HANDLE_TYPE_CNO.

RETURN VALUES

       DAT_SUCCESS	       The operation was successful.

       DAT_INVALID_HANDLE      The dat_handle parameter is invalid.

USAGE

       Consumers  can  use  this  operation to determine the type of Object being returned. This is needed for calling an appropriate query or any
       other operation on the Object handle.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Standard: uDAPL, 1.1, 1.2    |
       +-----------------------------+-----------------------------+
       |MT-Level		     |Unsafe			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       libdat(3LIB), attributes(5)

SunOS 5.10							    16 Jul 2004 					 dat_get_handle_type(3DAT)
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