[Solved] C system calls, delete the file

Just call truncate or ftruncate to cut the file to zero bytes. Then write the line you want. You don’t need to close or re-open the file, you can use your existing handle. 2 solved C system calls, delete the file

[Solved] Return value of process to String

! returns the exit code of the process (0 in your case). If you need the output of the process you should use !! instead: val url = “https://morningconsult.com/alert/house-passes-employee-stock-options-bill-aimed-startups/” import sys.process._ val result = (“wget -qO- ” + url !!).toString println(“result : ” + result) (relevant documentation) solved Return value of process to String

[Solved] Can’t understand this code — is it C?

Yes, this code is C programming language. It’s used for the development of the board AM437x. more info about the board take a look at am4372.dtsi,dt-bindings/pinctrl/am43x and pwm C libraries to understand this code if you are a senior C developer otherwise forget about it it’s not novice level. solved Can’t understand this code — … Read more

[Solved] Why is Android System.currentTimeMillis() not an accurate Timestamp? [duplicate]

While epoch time is measured in seconds, System.currentTimeMillis() returns the time in milliseconds for more accuracy, which is the value you see in the example. If you divide it by 1000 you will get the time in seconds, which will convert to the current epoch time you expect. You can paste the value in here … Read more

[Solved] Is An Operating System an Process ?

What underlays an Operating System is a kernel, which is a bunch of low level, routines that manage the memory and other parts of the computer. The kernel has processes and threads that help the kernel accomplish this task. Thus, the answer to your question is that no, the Operating System is not just one … Read more

[Solved] Problem of a string read in function system() (probably due to a bad malloc) [closed]

chain1 = (char *) malloc(5*sizeof(char*) + 1); This will allocate enough space for five character pointers plus an extra byte. A pointer is not the same as a character, it tends to be either four or eight bytes currently but can actually be any size. You probably want sizeof(char) but, since that’s always 1, you … Read more