Without seeing util.c I can't know what it's using gets for. gets reads a string from standard input, storing it as a character array terminated by a NULL character.
The problem with gets is that it takes an unlimited amount of input. It does not know how much space is available in the buffer. For instance:
If I typed "486193474587130958712057190856714890651618476" and hit enter, it would dump that entire string into that buffer of 16 bytes, which obviously isn't large enough to hold it. The remainder of it would get crammed into whatever bytes of memory trail after the buffer, which may be unused, or used for other variables, or part of the call stack, etc. When overflows like this happen they can be VERY hard to debug since by nature buffer overflows overwrite memory they're not supposed to. It's also a security risk -- if someone knows there's a buffer they can overflow, they can write to variables after it in memory, setting them to whatever values they want!
This is much safer:
This will not overflow the buffer, it will only read a maximum of 15 bytes.
Hey guys, need some help. Running AIX Version 5.2 and one of our cron jobs is writing errors to a log file. Any ideas on the following error message.
Error: Internal system error: Unable to initialize standard output file
I'm guessing more info might be needed, so let me know.
Thanks (2 Replies)
hi there
i write one awk script file in shell programing
the code is related to dd/mm/yy to month, day year format
but i get an error
please can anybody help me out in this problem ??????
i give my code here including error
awk `
# date-month -- convert mm/dd/yy to month day,... (2 Replies)
I encounters a VSIFAX related error:
vfxstat: Cannot login to server on rsac3: Connect error to host 172.16.1.45: Invalid argument
It started happening last night with a core dump. Then we can't start VSIFAX again.
I am runing VSI-FAX 4.2 on AIX box (0 Replies)
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Hello, help me please.
I am trying to create a mksysb bakup using nim. I am geting this error, how to correct it ? :
Command : failed stdout: yes stderr: no... (9 Replies)
Hi Guys.
This is part of my filesystem structure :
Filesystem size used avail capacity Mounted on
/dev/md/dsk/d0 47G 5.2G 42G 12% /
/devices 0K 0K 0K 0% /devices
ctfs 0K 0K 0K 0% ... (2 Replies)
Hi - I am getting the error
`Error reading response length from authentication socket'
when I ssh from my cluster to another cluster, and then back to my cluster. It doesn't seem to affect anything, but it's just annoying that it always pops up and tends to confuse new users of the cluster. I... (1 Reply)
im kinda new to shell scripting so i need some help
i try to run this script and get the error code
> 5 ")syntax error: operand expected (error token is "
the code for the script is
#!/bin/sh
#
# script to see if the given value is correct
#
# Define errors
ER_AF=86 # Var is... (4 Replies)
what is this error log = hda: irq timeout: error=0x00 and how to solve?
every day upon checking the logs i see this error.
hda: irq timeout: error=0x00
hda: irq timeout: error=0x00
hda: irq timeout: error=0x00
hda: irq timeout: error=0x00
hw_client: segfault at 0000000000000046 rip... (3 Replies)
I have two servers with a fresh install of Solaris 11, and having problems when doing rpcinfo between them. There is no firewall involved, so everything should theoretically be getting through. Does anyone have any ideas? I did a lot of Google searches, and haven't found a working solution yet.
... (2 Replies)
I am writing a shell script with 2 run time arguments. During the execution if i got any error, then it needs to redirected to a error file and in console. Also both error and output to be redirected to a log file. But i am facing the below error.
#! /bin/sh
errExit ()
{
errMsg=`cat... (1 Reply)
Discussion started by: sarathy_a35
1 Replies
LEARN ABOUT LINUX
uuid
UUID(3) Libuuid API UUID(3)NAME
uuid - DCE compatible Universally Unique Identifier library
SYNOPSIS
#include <uuid/uuid.h>
DESCRIPTION
The UUID library is used to generate unique identifiers for objects that may be accessible beyond the local system. This library generates
UUIDs compatible with those created by the Open Software Foundation (OSF) Distributed Computing Environment (DCE) utility uuidgen.
The UUIDs generated by this library can be reasonably expected to be unique within a system, and unique across all systems. They could be
used, for instance, to generate unique HTTP cookies across multiple web servers without communication between the servers, and without fear
of a name clash.
CONFORMING TO
OSF DCE 1.1
AUTHOR
Theodore Y. Ts'o
AVAILABILITY
libuuid is part of the util-linux package since version 2.15.1 and is available from ftp://ftp.kernel.org/pub/linux/utils/util-linux/.
SEE ALSO uuid_clear(3), uuid_compare(3), uuid_copy(3), uuid_generate(3), uuid_is_null(3), uuid_parse(3), uuid_time(3), uuid_unparse(3)util-linux May 2009 UUID(3)