I am making a garbage collector to develop an appreciation for how they work. I can process registers as well as heap and stack memory to find potential references to allocated blocks. But processing the global data memory has eluded me. Is there a way to get the upper and lower bounds of the global memory space in C (I'm using GCC on...
Hi, Why does the below code give Seg. Fault at last line? char* m=ReadName(); printf("\nRead String %s\n",m); // Writes OK char* token; token=strtok(m,'-'); As said, read string prints w/o problem, but why cannot split to tokens? ...
I compile Apache-MySQL-PHP by hand to build a custom install using the configure options from below. When I start apache it fails to start and adds the below error in the error_log. * Apache 2 * Mysql 5.0 * PHP 5.1 * CentOS Linux 5.4 * GCC compiler the error in apache log httpd: Syntax error on line 54 of /opt/clamp/etc/httpd.conf: Can...
I'm working on a relatively big project that is using automake build system. Now the problem is that I need to link the project with a library from another project (this works fine), but I also need to include a header from the other project source tree (api.h). INCLUDES = -I@REMOTE_PROJECT_DIR@ in Makefile.am doesn't work, because th...
Hi, I work on linux. I donot have much idea in windows. How the permissions of files are organized in windows? Do we have any api like chmod in unix to change the permissions? ...
I wish to make a self contained LAMP distro software package from source with at least the following: * php must have mysqli, ldap and GD support * all required .so's must be included (like libpng needed by GD) (self contained) I managed to make one but i keep patching quirks to it, SO i thought to start from a wide-used one like XAM...
I have one requirement in C. char abc[]="hello"; char hello[]="world"; Using abc whether we can get the hello variable's value in C. I know it is possible in some of the languages like Perl, Php, Bash,., Is it possible in C? ...
I've never used malloc to store more than values but I have to use strdup to order the lines of an input file and I dont get a way to make it work. I though using strdup() to get a pointer to each line and later, put each one into a space according to the number of lines reserved with malloc(). I dont know if I have to do it like reser...
Recently, i am looking into some assembly codes generated by GCC. But I dont understand some of them: movl $0x2d, 0x4(%esp) In the second operand, what does 0x4 stands for? offset address? And what the use of register EAX? ...
Hi all! let's say i have a char array like "äa". is there a way to get the ascii value (e.g 228) of the first char, which is a multibyte? even if i cast my array to a wchar_t * array, i'm not able to get the ascii value of "ä", because its 2 bytes long. is there a way to do this, im trying for 2 days now :( i'm using gcc. thanks! ...
I know, i've read about the difference between double precision and single precision etc. But they should give the same results on most cases right ? I was solving a problem on a programming contest and there were calculations with floating point numbers that were not really big so i decided to use float instead of double, and i checked...
Hi, Assume I have an executable called 'exe' which spawns a child process. This child process needs to become a daemon and we need to change its name. Next I want to use killall to send a signal to this process using the new name, but I need to use the old name. The order of events is as follows: start 'exec' fork -> exit if parent d...
Hi I want to print current time (by using printf) in same place, but i want to do it in infinite loop eg: while(1) {printf("Date and Time are %s", asctime(localtime(¤t))); } . So before i use printf i should move cursor backward to its staring position. How to do it ? thx in advance ...
I have been trying some programs in the C Language and come across to this... #include<stdio.h> int main() { int j=3,k; k=!5&&j; printf("%d",k); return 0; } can anyone figure out what is the problem in this if i compile the program i will result to 0 and when i tried the same code in c# public void logic() { ...
int bar = 2; if (bar) { int bar; } Neither gcc or Clang manages to issue a warning (or error) for this, and the program crashes immediately on launch. Is there a good reason for this? It doesn't seem like it would be something hard to catch. It's the basics of block scoping: the nested scope inherits the names of the enclosing block...
I installed gtk+2.0 version 2.18.3 but when i run command dpkg -i libgtk2.0-dev_2.18.3-1_i386.deb i have the next error but when i checked the /usr/lib/libgtk2.0-0 i found the version of the libgtk is 2.12.9 why the new installtion not override the pre one? and what i should do now? ----------------------------------------ERROR----...
What I'm trying to accomplish: I am making 3000 requests and capturing 8 bytes of that request. I stick the response in: struct negs { int neg_num; char neg_key[9]; }; where neg_num == i (the request number) and memcpy(nego[neg_count].neg_key, recv_data+73,8); I need to find any duplicate neg_keys in the nego struct. I am...
For a bit of background, I'm writing a meter reading application in C for a small 16-bit handheld computer that runs a proprietary version of DOS. I have a screen that displays meter information and prompts the user to type in a reading. When the user presses the enter key on the unit, the following code will execute: /* ... * beginn...
Hi , this maybe a noobish question so sorry, is it possible to run c programmes from cmd? I am in the process of creating a programme that takes 3 command line arguments, a string seperator and 2 file names and i have conditions such as if more or less command line items are passed then print an error etc i cannot test this from dev-c...
Do I need to malloc when creating a file to write to? The file will be based on the contents of 2 others, so would I need to malloc space for the writeable file of sizeof( file a ) + sizeof( file b) + 1? Sorry if this makes no sense; if it doesn't then I guess I need to go read some more :D Essentially, I have 2 txt files and a stri...