Name: execvp()
|
System call or function: Function |
Links: Online Manual | Course Packet |
What it does: Replaces the code of the program that calls it with a new code in the file file
, and passes the arguments argv
to that invoked program. The OS will search for this file at the locations indicated in the PATH environmental variable, and, otherwise, in the current folder. |
What libraries you must include: #include <unistd.h> // Defines execvp().
|
Syntax: int execvp (const char *file, char *const argv[]);
|
Description of arguments: file
: the name of the file containing the program to run
argv
: an array of command-line argument strings that will be passed to the new program
|
What type it returns: int
|
On success: It doesn't return: instead, the current program is replaced by the new program. |
On failure: -1
|
If failure, does it set errno
? Yes |
Quick example: execvp ("my_uniq", newargv);
perror ("execvp"); /* execvp() returns only on error */
|
Other variations: execve()
, execv()
, execle()
, execl()
, execlp()
|
These notes by Miriam Briskman are licensed under CC BY-NC 4.0 and based on sources.