PCAP_STRERROR(3) Library Functions Manual PCAP_STRERROR(3)NAME
pcap_strerror - convert an errno value to a string
const char *pcap_strerror(int error);
pcap_strerror() is provided in case strerror(3) isn't available. It returns an error message string corresponding to error.
SEE ALSO strerror(3)
4 April 2008 PCAP_STRERROR(3)
Check Out this Related Man Page
STRERROR(3) BSD Library Functions Manual STRERROR(3)NAME
perror, strerror, strerror_r, sys_errlist, sys_nerr -- system error messages
Standard C Library (libc, -lc)
perror(const char *string);
extern const char * const sys_errlist;
extern const int sys_nerr;
strerror_r(int errnum, char *strerrbuf, size_t buflen);
The strerror(), strerror_r() and perror() functions look up the error message string corresponding to an error number.
The strerror() function accepts an error number argument errnum and returns a pointer to the corresponding message string.
The strerror_r() function renders the same result into strerrbuf for a maximum of buflen characters and returns 0 upon success.
The perror() function finds the error message corresponding to the current value of the global variable errno (intro(2)) and writes it, fol-
lowed by a newline, to the standard error file descriptor. If the argument string is non-NULL and does not point to the null character, this
string is prepended to the message string and separated from it by a colon and space (``: ''); otherwise, only the error message string is
If the error number is not recognized, these functions return an error message string containing ``Unknown error: '' followed by the error
number in decimal. The strerror() and strerror_r() functions return EINVAL as a warning. Error numbers recognized by this implementation
fall in the range 0 < errnum < sys_nerr. The number 0 is also recognized, although applications that take advantage of this are likely to
use unspecified values of errno.
If insufficient storage is provided in strerrbuf (as specified in buflen) to contain the error string, strerror_r() returns ERANGE and
strerrbuf will contain an error message that has been truncated and NUL terminated to fit the length specified by buflen.
The message strings can be accessed directly using the external array sys_errlist. The external value sys_nerr contains a count of the mes-
sages in sys_errlist. The use of these variables is deprecated; strerror() or strerror_r() should be used instead.
SEE ALSO intro(2), err(3), psignal(3)STANDARDS
The perror() and strerror() functions conform to ISO/IEC 9899:1999 (``ISO C99''). The strerror_r() function conforms to IEEE Std 1003.1-2001
The strerror() and perror() functions first appeared in 4.4BSD. The strerror_r() function was implemented in FreeBSD 4.4 by Wes Peters
The strerror() function returns its result in a static buffer which will be overwritten by subsequent calls.
The return type for strerror() is missing a type-qualifier; it should actually be const char *.
Programs that use the deprecated sys_errlist variable often fail to compile because they declare it inconsistently.
BSD April 5, 2011 BSD
I have seen some misinformation regarding Unix file permissions. I will try to set the record straight. Take a look at this example of some output from ls:
$ ls -ld /usr/bin /usr/bin/cat
drwxrwxr-x 3 root bin 8704 Sep 23 2004 /usr/bin
-r-xr-xr-x 1 bin bin ... (6 Replies)
I have a file which looks roughly like this:
and would like to sort it numerically on the first field. I tried:
sort -nr --key=1 ....
The output I get is:
9964 ... (3 Replies)
Suppose I have a main() function with only one malloc statement allocating say some 1 gb memory. Also say my system has 1 gb of ram.
The program above exits without freeing the memory.
In this case will the 1 gb of heap memory be returned... (9 Replies)
I'm trying to install a PGX32 video card on my Sparc 10 Ultra running Solaris 10.
I've got the Oracle installation guide for it and I got as far as:
"4. Insert the CD-ROM labeled “GFX OpenWindows for Solaris 2” into the drive."
I don't have a CD-ROM by that name and a web search for that... (21 Replies)
I'm writing a short script to check if a continuous port is running on a server.
I'm using "ps -ef | grep -v grep | grep processName" and I was wondering if it was better/more reliable to just check the
return code from the command or if its better to pipe to... (12 Replies)
I installed NetBSD 6.1.2 amd64 and can't find the apm utility. Is it not in the base system?
Is it necessary to recompile the default amd64 kernel to use apm?
Or is there a new method for power management and suspend/resume? (2 Replies)
I am learning shell scripting for the first time. I use AT&T Korn Shell, Version AJM 93u+ 2012-08-01, compiled from source on NetBSD.
So far I have managed to set up what I think is a useful and pleasing shell prompt, which can be seen in the image attached to this post.
The prompt is... (2 Replies)
Hey gang, I have a list of times I need to sum up. This list can vary from a few to a few thousand entries. Now I had found a closed reference to adding time titled "add up time with xx:yy format in bash how?" In it, the example works great for that formatted list of times... This is the reply code... (5 Replies)
Usually when I on the evening go to bed I take some interesting book with me. I read it for a while to get me down to sleep. Probably most people seek information from the Nett by googleing but I am so oldfashioned I prefer a real book ;)
But what a book. The one I found and ordered is BSD Unix®... (0 Replies)
On the late 1960s I got short hands on experience with a russian "small" computer. It vas a copy of DEC's VAX ... and running some version of BSD-Unix. After that I worked in a university following the development of computing. After retire I started collecting old pc's and installing... (13 Replies)