How to execute another program in C (using exec)

[liviusalecu]

In case you have troubles working with the _execl() function and with the #include <process.h>, try solely including <unistd.h> and using the execl() function.
This temporary solved my issues.

Thank you for all the clear explanations!

[sleepaleart]

Dude your videos are life saving! I'm beginning to actually understand my computer systems class because of them. Thank you so much!

[yangyue]

❤ A real Vault of Code!!! Your videos helped me a lot to understand not only how to use system calls, but also the principles of OS. I did bad in my undergraduate OS and computer network courses. Now I am taking graduate OS courses and reviewing the knowledge. Following your video, I am confident in being an OS/computer network engineer or researcher!

[zaabimahdi]

I just finished my Shell Project yesterday ! you are reading my mind ...

[MarcoAurelio-svtk]

Tip: For instance, you introduce "execl". Describe the function based on the documentation (so that people actually learn how to read documentation), but describe the key points: The function declaration, a bit of the description, how to handle errors and the return types. Because people are never used to read the documentation. They are used to see the implementation of it in videos and that's it. This will get people used to look into the documentation. Normally, people starting using Linux have a hard time understand the man pages, because they are too technical for beginners. I have solved a lot of problems offline (when i had no internet access) just navigating the man pages. Also, 5 minutes reading docs will potentially save 4 or 5 or more hours of debugging.

[GAMEVUEG]

Bro is there a way to thank you financially for your help ? You saved my semester, I would like to thank you for that

[midhatahir]

Just worked with Shell project following your tutorials. Thanks

[juggles]

You are the hero of CS students the world over! Thanks so much

[jobtoolbox]

Thank you very much for this video. Excellent explanation and demo. Saved me many hours or reading and messing about.

[陳己見]

Thanks a lot, much clearer than my professor's instruction

[raul_ribeiro_bonifacio]

Great video. Thank you for your great explanation! Helped me a lot!
On a side note, I believe this video is out of order in the Unix Processes in C playlist.

[tuomasbazzan]

you probably get alot of comments like this but this video was indeed life saving :D

[bama]

Thank you, sir, for great explanation and examples. Good job!

[bassamnaji]

In my opinion, you are much better than uni's doctors 🌚.
THANK YOU SO MUCH FOR YOUR EFFORT!!

[AndrewCodeDev]

I've really been enjoying your content. Thanks for all your great work and well constructed presentations.

[akashdev]

Thank you so much for this video.. I understood everything.. thanks alot.. . loved it..

[kevinjensen]

Great, but how to you pass a return value, i.e., if the program you launch runs and returns a value, how do you get it? I'd love a simple explanation. Sounds like you can't use errno as the parent shell is gone if the called program launches???

[axmedkayse]

Amazing video for exec and os in general.

[multivalfran]

Great video, you were ultra helpful. Thank you very much

[LinaLina_]

I don't know why execl doesn't work for linux . I tried to find the path using which ls and whereis ls but it doesn't work . But execlp works and pings to google