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Full Discussion: No error but not executing
Top Forums Programming No error but not executing Post 302479338 by gokult on Friday 10th of December 2010 11:01:13 AM
Old 12-10-2010
No error but not executing
Hi friends
When I compile thic program by gcc filename, it shows no error.
But after that if I execute the program gets stuck.
Can any one find out.






Code:
#include<stdio.h>
#include<sys/types.h>
#include<sys/mman.h>
#include<stdlib.h>
#include<fcntl.h>
#include<sys/stat.h>
#include<unistd.h>
#include<signal.h>
#include<string.h>

main(int argc, char *argv[])
{
int fd,changes,i,random_spot,kids[2];
struct stat buf;
char *the_file,*starting_string="Finally got it! \n";
size_t length=strlen(the_file);
size_t starting=strlen(starting_string);
if (argc!=2)
{
fprintf(stderr, "Usage %s file_name \n",*argv);
exit(1);
}
if((fd=open(argv[1], O_CREAT | O_RDWR,0666))<0)
{
fprintf(stderr,"open error on file %s\n",*argv);
exit(3);
}
write(fd,starting_string,starting);
if(fstat(fd,&buf)<0)
{
fprintf(stderr,"fstat error on file %s\n",*argv);
exit(4);
}
if((the_file=mmap(0,(size_t)
buf.st_size,PROT_READ|PROT_WRITE,MAP_SHARED,fd,0))==(caddr_t)-1)
{
fprintf(stderr,"mmap failure\n");
exit(5);
}
for(i=0;i<length;++i)
{
if(*(the_file+i)>='0' && *(the_file+i)<='9')
*(the_file+i)='*';
sleep(1);
}
printf("Parent done with changes\n");
 printf("The file now contains:\n%s\n",the_file);
exit(0);
}

---------- Post updated at 10:59 AM ---------- Previous update was at 10:47 AM ----------

That program has errors ... I changed it and removed all errors.
Now, there is executing error. Check properly

---------- Post updated at 11:01 AM ---------- Previous update was at 10:59 AM ----------

sorry .. it did not show up.. thats y i posted it again
Last edited by pludi; 12-10-2010 at 11:56 AM.. Reason: code tags, please...
 

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LEARN ABOUT DEBIAN

klcc

klcc(1) 							  H. Peter Anvin							   klcc(1)

NAME

       klcc - compile a program against klibc

SYNOPSIS

       klcc [gcc options] [-o outfile] infile...

DESCRIPTION

       klcc  is  a  wrapper  around  gcc(1)  and  ld(1) which compiles and links a program against the klibc tiny C library.  It supports most gcc
       options.

       Unlike gcc, klcc compiles with optimization on by default.  Furthermore, the optimization level used depends on whether or not -g is speci-
       fied,  since klcc frequently uses options in the normal case which makes debugging impossible.  Therefore, compile without -g, -O, -f or -m
       option to use the default optimization level; this will generally result in the smallest binaries.  You may want to use	-s  when  linking,
       however.  Use -O0 to compile without any optimization whatsoever; this may not work depending on the version of gcc used.

       -nostdinc
	      allows to turn off klibc include files.

       Use  the  -shared  or  -static option to compile for and link against shared or static klibc.  Note that shared klibc only supports running
       against the exact same klibc binary as the binary was linked with.

       In addition to standard gcc options, klcc supports options of the form -print-klibc-option, which prints the corresponding klibc configura-
       tion option.

AUTHOR

       Written by H. Peter Anvin <hpa@zytor.com>.

COPYRIGHT

       Copyright (C) 2005 H. Peter Anvin - All Rights Reserved

       Permission  is  hereby  granted,  free  of  charge, to any person obtaining a copy of this software and associated documentation files (the
       "Software"), to deal in the Software without restriction, including without limitation the rights to use,  copy,  modify,  merge,  publish,
       distribute,  sublicense,  and/or  sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to
       the following conditions:

       The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

       THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO  THE  WARRANTIES  OF  MER-
       CHANTABILITY,  FITNESS  FOR  A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
       CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF  OR  IN  CONNECTION  WITH  THE
       SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

SEE ALSO

       gcc(1)

klibc								   1 March 2005 							   klcc(1)
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