03-27-2015
Exactly that line - how many opening parentheses and how many closing?
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1. Shell Programming and Scripting
Hello,
I am trying to write a bash script function to present the user a menu of options. The following is what I have so far:
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I have a main menu
quit=n
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Greetings all,
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Hi again :)
This is just a sample whiptail menu.
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Dear Sir,
May I know how do I go about adding the following feature into the script below:
When user enter values other than 1,2,3,4,
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Hi,
In the archives I found this:
And this works fine.
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Hello,
Been trying to build a menu with whiptail lately. However, my code doesn't seems to be working even though when i compared to other similar code they looks the same.
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Ever since I added these two code blocks to my bash menu it just opens and closes right away. I use a batch file that worked fine until these codes were added and I am not sure what is wrong.
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We have a simple menu with prompt of menu numbers to user.
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LEARN ABOUT POSIX
getnetbyname
ENDNETENT(P) POSIX Programmer's Manual ENDNETENT(P)
NAME
endnetent, getnetbyaddr, getnetbyname, getnetent, setnetent - network database functions
SYNOPSIS
#include <netdb.h>
void endnetent(void);
struct netent *getnetbyaddr(uint32_t net, int type);
struct netent *getnetbyname(const char *name);
struct netent *getnetent(void);
void setnetent(int stayopen);
DESCRIPTION
These functions shall retrieve information about networks. This information is considered to be stored in a database that can be accessed
sequentially or randomly. The implementation of this database is unspecified.
The setnetent() function shall open and rewind the database. If the stayopen argument is non-zero, the connection to the net database
shall not be closed after each call to getnetent() (either directly, or indirectly through one of the other getnet*() functions), and the
implementation may maintain an open file descriptor to the database.
The getnetent() function shall read the next entry of the database, opening and closing a connection to the database as necessary.
The getnetbyaddr() function shall search the database from the beginning, and find the first entry for which the address family specified
by type matches the n_addrtype member and the network number net matches the n_net member, opening and closing a connection to the database
as necessary. The net argument shall be the network number in host byte order.
The getnetbyname() function shall search the database from the beginning and find the first entry for which the network name specified by
name matches the n_name member, opening and closing a connection to the database as necessary.
The getnetbyaddr(), getnetbyname(), and getnetent() functions shall each return a pointer to a netent structure, the members of which shall
contain the fields of an entry in the network database.
The endnetent() function shall close the database, releasing any open file descriptor.
These functions need not be reentrant. A function that is not required to be reentrant is not required to be thread-safe.
RETURN VALUE
Upon successful completion, getnetbyaddr(), getnetbyname(), and getnetent() shall return a pointer to a netent structure if the requested
entry was found, and a null pointer if the end of the database was reached or the requested entry was not found. Otherwise, a null pointer
shall be returned.
ERRORS
No errors are defined.
The following sections are informative.
EXAMPLES
None.
APPLICATION USAGE
The getnetbyaddr(), getnetbyname(), and getnetent() functions may return pointers to static data, which may be overwritten by subsequent
calls to any of these functions.
RATIONALE
None.
FUTURE DIRECTIONS
None.
SEE ALSO
The Base Definitions volume of IEEE Std 1003.1-2001, <netdb.h>
COPYRIGHT
Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003 Edition, Standard for Information Technol-
ogy -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of
Electrical and Electronics Engineers, Inc and The Open Group. In the event of any discrepancy between this version and the original IEEE
and The Open Group Standard, the original IEEE and The Open Group Standard is the referee document. The original Standard can be obtained
online at http://www.opengroup.org/unix/online.html .
IEEE
/The Open Group 2003 ENDNETENT(P)