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Shell Programming and Scripting
How to find a certain string in a file and replace it with a value from another file using sed/awk?
Post 302481044 by paramad on Thursday 16th of December 2010 12:59:57 PM
12-16-2010
Guys thanx for replying!!
But will these solve my problem? since where exactly are we searching the string 'OUT' here? I actually have similar other strings to search and replace with other values from other files.. actually this is the case:
file 1:
(define argc :: int)
(assert (> argc 1))
(assert (= argc ARG))
<check>
(define argc :: float)
(assert (> c 0))
(assert (= c OUT))
<check>
.
.
.
file2:
main 1
file 3:
main 0
.
.
.
Now, I have to find the string 'ARG' from file 1 and replace it with the value '1' from file 2. And, find 'OUT' and replace it with the value '0' from file 3.
Now can you put some more light on it?
But will these solve my problem? since where exactly are we searching the string 'OUT' here? I actually have similar other strings to search and replace with other values from other files.. actually this is the case:
file 1:
(define argc :: int)
(assert (> argc 1))
(assert (= argc ARG))
<check>
(define argc :: float)
(assert (> c 0))
(assert (= c OUT))
<check>
.
.
.
file2:
main 1
file 3:
main 0
.
.
.
Now, I have to find the string 'ARG' from file 1 and replace it with the value '1' from file 2. And, find 'OUT' and replace it with the value '0' from file 3.
Now can you put some more light on it?
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LEARN ABOUT XFREE86
assert
ASSERT(3) Linux Programmer's Manual ASSERT(3) NAME
assert - abort the program if assertion is false SYNOPSIS
#include <assert.h> void assert(scalar expression); DESCRIPTION
This macro can help programmers find bugs in their programs, or handle exceptional cases via a crash that will produce limited debugging output. If expression is false (i.e., compares equal to zero), assert() prints an error message to standard error and terminates the program by calling abort(3). The error message includes the name of the file and function containing the assert() call, the source code line number of the call, and the text of the argument; something like: prog: some_file.c:16: some_func: Assertion `val == 0' failed. If the macro NDEBUG is defined at the moment <assert.h> was last included, the macro assert() generates no code, and hence does nothing at all. It is not recommended to define NDEBUG if using assert() to detect error conditions since the software may behave non-deterministi- cally. RETURN VALUE
No value is returned. ATTRIBUTES
For an explanation of the terms used in this section, see attributes(7). +----------+---------------+---------+ |Interface | Attribute | Value | +----------+---------------+---------+ |assert() | Thread safety | MT-Safe | +----------+---------------+---------+ CONFORMING TO
POSIX.1-2001, POSIX.1-2008, C89, C99. In C89, expression is required to be of type int and undefined behavior results if it is not, but in C99 it may have any scalar type. BUGS
assert() is implemented as a macro; if the expression tested has side-effects, program behavior will be different depending on whether NDE- BUG is defined. This may create Heisenbugs which go away when debugging is turned on. SEE ALSO
abort(3), assert_perror(3), exit(3) COLOPHON
This page is part of release 4.15 of the Linux man-pages project. A description of the project, information about reporting bugs, and the latest version of this page, can be found at https://www.kernel.org/doc/man-pages/. GNU
2017-09-15 ASSERT(3)