09-18-2002
Has anyone seen this issue with the /dev/null?
hello all,
I am working in a Hpux 11.0 64 bit environment. I am not sure if a third party software is doing this or not, but the admin to this server says it is not a server issue as he has check and double check logs and crons to verify this issue. My problem, is that every now and then, once and hour or so, the /dev/null device gets its permissions changed to read only.... As you know, this can be a big head-ache for a lot of processes and apps that use this particuar device. One major software that we are seeing a lot of incidents with is Oracle. It uses the /dev/null a lot and whenever the permissions gets changed, Oracle complains. I am also getting this message when I log into the server every now and then. So to work around this issue, the sysadmin has a cron that goes out and checks the permissions on the /dev/null device....but unfortunately cron only runs to the minute level and I need this to run at least every 3-5 seconds as we have files processing against Oracle constantly 24 X 7.....and I am not really comfortable with band aid approaches......Does anyone have any recommendations. This is starting to be a big issue for me now that this server is starting to be utilize a lot more than before...
thanks,
OS
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index(3C) Standard C Library Functions index(3C)
NAME
index, rindex - string operations
SYNOPSIS
#include <strings.h>
char *index(const char *s, int c);
char *rindex(const char *s, int c);
DESCRIPTION
The index() and rindex() functions operate on null-terminated strings.
The index() function returns a pointer to the first occurrence of character c in string s.
The rindex() function returns a pointer to the last occurrence of character c in string s.
Both index() and rindex() return a null pointer if c does not occur in the string. The null character terminating a string is considered
to be part of the string.
USAGE
On most modern computer systems, you can not use a null pointer to indicate a null string. A null pointer is an error and results in an
abort of the program. If you wish to indicate a null string, you must use a pointer that points to an explicit null string. On some
machines and with some implementations of the C programming language, a null pointer, if dereferenced, would yield a null string. Though
often used, this practice is not always portable. Programmers using a null pointer to represent an empty string should be aware of this
portability issue. Even on machines where dereferencing a null pointer does not cause an abort of the program, it does not necessarily
yield a null string.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Interface Stability |Standard |
+-----------------------------+-----------------------------+
SEE ALSO
bstring(3C), malloc(3C), string(3C), attributes(5), standards(5)
SunOS 5.10 24 Jul 2002 index(3C)