echo - Create a file with execvp -

i trying run

echo "hello world" > foo.txt 

using execvp.

so far, have this:

#include <unistd.h>  int main(void) {   char *execargs[] = { "echo", "hello, world! > foo.txt", null };   execvp("echo", execargs);   return 0; } 

which print out line "hello, world! > foo.txt", instead of creating file named foo.txt text "hello, world!" inside.

someone similar on stack overflow, this:

execlp( "/bin/sh", "/bin/sh", "-c", "cat file1.txt > redirected.txt", (char *)null ); 

but when changed to

execlp( "echo", "echo", "echo hello world > redirected.txt", (char *)null ); 

nothing happens.

edit:

doing worked (thanks, sometimesright!)

execlp( "/bin/sh", "/bin/sh", "-c", "echo hello, world! > redirected.txt", (char *)null ); 

execlp runs executable expects find in path. echo not executable, command runs in context of shell command interpreter such sh or bash.

i take back: in linux there echo executable in /bin. pipe stdout using '>' need assistance of shell 'sh'.