01-28-2013
Where exactly the string is stored is implementation-defined and shouldn't matter to you as an application developer.
sys_errlist is in stdio.h (see 'man sys_errlist'). It is initialized before your main() function is called. I don't know whether it's "editable" or not - frankly I cannot think of any reason that this would be anything other than a terrible, terrible idea.
What exactly are you trying to achieve here - what's the end-goal for this line of enquiry?
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LEARN ABOUT OPENSOLARIS
strerror_r
strerror(3C) Standard C Library Functions strerror(3C)
NAME
strerror, strerror_r - get error message string
SYNOPSIS
#include <string.h>
char *strerror(int errnum);
int strerror_r(int errnum, char *strerrbuf, size_t buflen);
DESCRIPTION
The strerror() function maps the error number in errnum to an error message string, and returns a pointer to that string. It uses the same
set of error messages as perror(3C). The returned string should not be overwritten.
The strerror_r() function maps the error number in errnum to anerror message string and returns the string in the buffer pointed to by str-
errbuf with length buflen.
RETURN VALUES
Upon successful completion, strerror() returns a pointer to the generated message string. Otherwise, it sets errno and returns a pointer to
an error message string. It returns the string "Unknown error" if errnum is not a valid error number.
Upon successful completion, strerror_r() returns 0. Otherwise it sets errno and returns the value of errno to indicate the error. It
returns the string "Unknown error" in the buffer pointed to by strerrbuf if errnum is not a valid error number.
ERRORS
These functions may fail if:
EINVAL The value of errnum is not a valid error number.
The strerror_r() function may fail if:
ERANGE The buflen argument specifies insufficient storage to contain the generated message string.
USAGE
Messages returned from these functions are in the native language specified by the LC_MESSAGES locale category. See setlocale(3C).
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Interface Stability |Standard |
+-----------------------------+-----------------------------+
|MT-Level |Safe |
+-----------------------------+-----------------------------+
SEE ALSO
gettext(3C), perror(3C), setlocale(3C), attributes(5), standards(5)
SunOS 5.11 31 Mar 2005 strerror(3C)