Question

I’m new to C and am trying to use the read function. I want to take what’s in the buffer (tempChar) and put it in another char array (str). This is so I can run the read function again and add on to str later (because tempChar will be rewritten by the 2nd read function). Like this:

char tempChar;
read(0, &tempChar, 10);

char *str;
str= (char*) malloc(10);
memcpy(str, &tempChar, fileSize); /*I'm doing something wrong here*/

All this so I can rerun:

read(0,&tempChar, 1);
str= realloc(str, 11);
str[10]=tempChar;

It compiles fine, but it gives me a segmentation fault when I actually try to run it.

Any ideas? Thanks a bunch.

Answer 1

you need to have enough storage to store the 10 characters you are reading

you declared

char tempChar

which can hold 1 character.

Instead declare tempChar as

char tempChar[10];