Hi, I'm trying to implement a C program on ubuntu which reads the contents of a file that is passed in as an argument and then displays it to the screen. So far I've cobbled together this from bits online but most of it is probably wrong as its all copied and pasted...
Code:
#include <stdio.h>
#include <sys/types.h>
#include <unistd.h>
int main (argc, char *argv[])
{
char buf[20];
size_t nbytes;
ssize_t bytes_read;
int fd;
nbytes = sizeof(buf);
bytes_read = read(fd, buf, nbytes);
dump_buffer();
return 0;
}
void dump_buffer(void *buffer, int buffer_size)
{
int i;
for(i = 0;i < buffer_size;++i)
printf("%c", ((char *)buffer)[i]);
}
The main bit i don't get is what the 'fd' argument is thats passed into the read() function? surely doesn't that need to be some reference to the file not just a random int?? I'm also not supposed to be using high level functions life fopen() etc. Could someone please point me where to go and list the (probably many) errors i've made. Thanks
Last edited by joeyg; 02-17-2012 at 01:48 PM..
Reason: Please wrap scripts and data with CodeTags; makes easier to identify and read
Hello guys, thank God that I found this forum.
I hope that someone can help me because I don't have any idea on how to start it. I know that for some of you this is a very simple task but I'm not as advance on shell scripting like many people out there.
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00a
00b
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Use and complete the template provided. The entire template must be completed. If you don't, your post may be deleted!
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Discussion started by: seeki
2 Replies
LEARN ABOUT DEBIAN
seeded-in-ubuntu
seeded-in-ubuntu(1) General Commands Manual seeded-in-ubuntu(1)NAME
seeded-in-ubuntu - Determine whether a package is safe to upload during a freeze
SYNOPSIS
seeded-in-ubuntu [options] package...
DESCRIPTION
Lists all the current daily images containing the specified packages. Or whether the package is part of the supported seed.
If it isn't on an image, it should be safe to upload. During the final freeze, one should avoid packages in the supported seed too.
An index of the current manifests is downloaded from UbuntuWire.
OPTIONS -b, --binary
The packages specified are binary packages. This is faster than source packages, as otherwise we must query LP to determine the
binary packages that every specified source package builds.
-u URL, --data-url=URL
URL for index of seeded packages. Default: UbuntuWire's service at http://qa.ubuntuwire.org/ubuntu-seeded-packages/seeded.json.gz.
-h, --help
Display a help message and exit
EXAMPLES
All the images that contain unity:
seeded-in-ubuntu -b unity
AUTHORS
seeded-in-ubuntu and this manpage were written by Stefano Rivera <stefanor@ubuntu.com>.
Both are released under the terms of the ISC License.
ubuntu-dev-tools December 2011 seeded-in-ubuntu(1)
02-17-2012
