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Shell Programming and Scripting
perl: eval and constants
Post 60723 by cbkihong on Thursday 20th of January 2005 07:33:56 PM
01-20-2005
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9 More Discussions You Might Find Interesting
1. Programming
Hi all
My question is related to following sample code which tries to change consant value by pointers.(I know it is wrong practice but i am surprised by mis-behaviour)
The code:
#include <stdio.h>
int main()
{
const int x = 10;
int *y;
const int * const z = &x;
y = (int *)&x;... (2 Replies)
Discussion started by: Shobhit
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Here is my perl Program:
#!/usr/bin/perl -w
my $a="sam";
my $b="ste";
my $c="abcdef";
my $d=931;
$str="
@<<<<< @>>>>>>>>>> @|||||||||||||||||||| @#########
\$a,\$b,\$c,\$d
.";
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I used the eval command in shell programming for assigning a value to a stored value of a variable.
Example:
VAR="Unix_Id"
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Hello there,
I'd like to define a variable b equal to 0.5/a where a=0.001, so I wrote something like that:
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Hi all,
some small script with eval turned me to crazy.
my OS is linux
Linux s10-1310 2.6.16.53-0.8.PTF.434477.3.TDC.0-smp #1 SMP Fri Aug 31 06:07:27 PDT 2007 x86_64 x86_64 x86_64 GNU/Linux
below script works well
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eval ssh remotehost date
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Hi All,
I read the above written code (perl code) in another perl script and evaluates this code for each line of text file,but using exit statement in code make this not to work and i could not get the desired results. However if i use return it works fine. I just need to know why it doesn't... (1 Reply)
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Hello All,
I am trying to use perl eval in a complex code and below given is a pseudo code of my logic.
Here $result evalutes to empty.
Please help.How should I retrieve of $t where $f just hold the name of varaible i.e t
$t=10;
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anyone has any info on why this is complaining???
vivek@vivek-c5e55ef2e ~/TAC
$ zoneCounter=1
vivek@vivek-c5e55ef2e ~/TAC
$ optUsage1=23%
vivek@vivek-c5e55ef2e ~/TAC
$ eval eval echo "<th>Zone $zoneCounter </th><th align=\"left\"> \$optUsage$zoneCounter </th>"
-bash: syntax error... (1 Reply)
Discussion started by: vivek d r
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9. Shell Programming and Scripting
anyone has any info on why this is complaining???
vivek@vivek-c5e55ef2e ~/TAC
$ zoneCounter=1
vivek@vivek-c5e55ef2e ~/TAC
$ optUsage1=23%
vivek@vivek-c5e55ef2e ~/TAC
$ eval eval echo "<th>Zone $zoneCounter </th><th align=\"left\"> \$optUsage$zoneCounter </th>"
-bash: syntax error... (13 Replies)
Discussion started by: vivek d r
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LEARN ABOUT FREEBSD
dwarf_get_at_name
DWARF_GET_AT_NAME(3) BSD Library Functions Manual DWARF_GET_AT_NAME(3) NAME
dwarf_get_ACCESS_name, dwarf_get_AT_name, dwarf_get_ATE_name, dwarf_get_CC_name, dwarf_get_CFA_name, dwarf_get_CHILDREN_name, dwarf_get_DS_name, dwarf_get_DSC_name, dwarf_get_EH_name, dwarf_get_END_name, dwarf_get_FORM_name, dwarf_get_ID_name, dwarf_get_INL_name, dwarf_get_LANG_name, dwarf_get_LNE_name, dwarf_get_LNS_name, dwarf_get_MACINFO_name, dwarf_get_OP_name, dwarf_get_ORD_name, dwarf_get_TAG_name, dwarf_get_VIRTUALITY_name, dwarf_get_VIS_name -- retrieve the symbolic names of DWARF constants LIBRARY
DWARF Access Library (libdwarf, -ldwarf) SYNOPSIS
#include <libdwarf.h> int dwarf_get_ACCESS_name(unsigned val, char **str); int dwarf_get_AT_name(unsigned val, char **str); int dwarf_get_ATE_name(unsigned val, char **str); int dwarf_get_CC_name(unsigned val, char **str); int dwarf_get_CFA_name(unsigned val, char **str); int dwarf_get_CHILDREN_name(unsigned val, char **str); int dwarf_get_DS_name(unsigned val, char **str); int dwarf_get_DSC_name(unsigned val, char **str); int dwarf_get_EH_name(unsigned val, char **str); int dwarf_get_END_name(unsigned val, char **str); int dwarf_get_FORM_name(unsigned val, char **str); int dwarf_get_ID_name(unsigned val, char **str); int dwarf_get_INL_name(unsigned val, char **str); int dwarf_get_LANG_name(unsigned val, char **str); int dwarf_get_LNE_name(unsigned val, char **str); int dwarf_get_LNS_name(unsigned val, char **str); int dwarf_get_MACINFO_name(unsigned val, char **str); int dwarf_get_OP_name(unsigned val, char **str); int dwarf_get_ORD_name(unsigned val, char **str); int dwarf_get_TAG_name(unsigned val, char **str); int dwarf_get_VIRTUALITY_name(unsigned val, char **str); int dwarf_get_VIS_name(unsigned val, char **str); DESCRIPTION
These functions return the symbolic name of a numeric DWARF constant. Argument val specifies the numeric value whose symbolic name is desired. Argument str should point to a location which will hold the returned NUL-terminated string containing the symbolic name of the specified value. The list of functions and the DWARF constants that they accept are: dwarf_get_ACCESS_name() DW_ACCESS_* constants. dwarf_get_AT_name() DW_AT_* constants. dwarf_get_ATE_name() DW_ATE_* constants. dwarf_get_CC_name() DW_CC_* constants. dwarf_get_CFA_name() DW_CFA_* constants. dwarf_get_CHILDREN_name() DW_CHILDREN_* constants. dwarf_get_DS_name() DW_DS_* constants. dwarf_get_DSC_name() DW_DSC_* constants. dwarf_get_EH_name() DW_EH_PE_* constants. dwarf_get_END_name() DW_END_* constants. dwarf_get_FORM_name() DW_FORM_* constants. dwarf_get_ID_name() DW_ID_* constants. dwarf_get_INL_name() DW_INL_* constants. dwarf_get_LANG_name() DW_LANG_* constants. dwarf_get_LNE_name() DW_LNE_* constants. dwarf_get_LNS_name() DW_LNS_* constants. dwarf_get_MACINFO_name() DW_MACINFO_* constants. dwarf_get_OP_name() DW_OP_* constants. dwarf_get_ORD_name() DW_ORD_* constants. dwarf_get_TAG_name() DW_TAG_* constants. dwarf_get_VIRTUALITY_name() DW_VIRTUALITY_* constants. dwarf_get_VIS_name() DW_VIS_* constants. RETURN VALUES
These functions return DW_DLV_OK on success. If the DWARF constant denoted by argument val is not recognized, these function return DW_DLV_NO_ENTRY. SEE ALSO
dwarf(3) BSD
April 22, 2011 BSD