If you can find a suitable scanf-format, you might be able to do it all with one fscanf. If you have to change things later, this could be useful, or not. Probably not, but you are the judge.
I have data that looks like this
aaa!bbb!ccc/ddd/eee
It is not fixed format. I need to parse ddd into a var in order to decide if I want to process that row. If I do I need to put ccc and bbb into vars to process it. I need to do this during a while loop one record at a time. Any... (11 Replies)
i am trying to use the history functions in a c++ program along with a custom signal handler for SIGINT.
the prog works fine catching signals without the line:
add_history(*args);
but as soon as this line is added, the prog segfaults on SIGINT.
does anyone have experience using gnu... (2 Replies)
Hello, sorry if this has been posted before but i was wondering if there is a way to run a program until a segmentation fault is found.
Currently i'm using a simple shell script which runs my program 100 times, sleeps 1 second because srand(time(0)) is dependent on seconds. Is there a possible... (1 Reply)
We have a Solaris 8 server which users login to via VNC to get a desktop. On that desktop these users use Netscape Communicator 4.9 to access a very important mail account. Unfortunately Netscape has started segfaulting regularly.
Does anyone have any ideas how I can try to find out what point... (1 Reply)
1. Even if i have the handles for ctrl+c it gives off a segfault
2. syslog doesn't log LOG_ERR event with log masked specified or non specified, it logs LOG_WARNING however...
#include <sys/types.h> /* include this before any other sys headers */
#include <sys/stat.h>
#include <fcntl.h>... (2 Replies)
Hello everyone,
I'm writing a program using the id3lib unfortunately I've encountered with memory issue that cause segmentation fault. I tried to rerun and analyze the program with valgrind but it doesn't point me anywhere. I really stuck on this one.
Valgrind output:
==14716== Invalid read of... (2 Replies)
I have a program that allows users to specify the debug log file location and name.
I have tried using the access() and stat() but they both segfault if the drive say (d:\) is invalid. Both seem to be fine if the drive exists.
Could someone please point me in the direction to a function that... (1 Reply)
hello all,
my question is not about How code can be rewritten, i just wanna know even though i am not using read only memory of C (i have declared str) why this function gives me segfault :wall:and the other code executes comfortably though both code uses same pointer arithmetic.
... (4 Replies)
I am populating an array of string and print it.
But it going in infinite loop and causing segfault.
char Name = {
"yahoo",
"rediff",
"facebook",
NULL
};
main(int argc, char* argv)
{
int j = 0;
... (7 Replies)
Hello:
I have some text output, on SunOS 5.11 platform using KSH:
I am trying to parse out each string within the () for each line.
I tried, as example:
perl -lanF"" -e 'print "$F $F $F $F $F $F"'
But for some reason, the output gets all garbled after the the first fields.... (8 Replies)
Discussion started by: gilgamesh
8 Replies
LEARN ABOUT POSIX
vfscanf
VFSCANF(3P) POSIX Programmer's Manual VFSCANF(3P)PROLOG
This manual page is part of the POSIX Programmer's Manual. The Linux implementation of this interface may differ (consult the correspond-
ing Linux manual page for details of Linux behavior), or the interface may not be implemented on Linux.
NAME
vfscanf, vscanf, vsscanf -- format input of a stdarg argument list
SYNOPSIS
#include <stdarg.h>
#include <stdio.h>
int vfscanf(FILE *restrict stream, const char *restrict format,
va_list arg);
int vscanf(const char *restrict format, va_list arg);
int vsscanf(const char *restrict s, const char *restrict format,
va_list arg);
DESCRIPTION
The functionality described on this reference page is aligned with the ISO C standard. Any conflict between the requirements described here
and the ISO C standard is unintentional. This volume of POSIX.1-2008 defers to the ISO C standard.
The vscanf(), vfscanf(), and vsscanf() functions shall be equivalent to the scanf(), fscanf(), and sscanf() functions, respectively, except
that instead of being called with a variable number of arguments, they are called with an argument list as defined in the <stdarg.h>
header. These functions shall not invoke the va_end macro. As these functions invoke the va_arg macro, the value of ap after the return is
unspecified.
RETURN VALUE
Refer to fscanf().
ERRORS
Refer to fscanf().
The following sections are informative.
EXAMPLES
None.
APPLICATION USAGE
Applications using these functions should call va_end(ap) afterwards to clean up.
RATIONALE
None.
FUTURE DIRECTIONS
None.
SEE ALSO
Section 2.5, Standard I/O Streams, fscanf()
The Base Definitions volume of POSIX.1-2008, <stdarg.h>, <stdio.h>
COPYRIGHT
Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2013 Edition, Standard for Information Technol-
ogy -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 7, Copyright (C) 2013 by the Institute of
Electrical and Electronics Engineers, Inc and The Open Group. (This is POSIX.1-2008 with the 2013 Technical Corrigendum 1 applied.) 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 Stan-
dard is the referee document. The original Standard can be obtained online at http://www.unix.org/online.html .
Any typographical or formatting errors that appear in this page are most likely to have been introduced during the conversion of the source
files to man page format. To report such errors, see https://www.kernel.org/doc/man-pages/reporting_bugs.html .
IEEE /The Open Group 2013 VFSCANF(3P)