Output stream redirection

When Zig code is compiled for native execution, the following functions of the C library are intercepted at the OS level:

• fputc
• fprintf
• fputs
• fwrite
• perror
• printf
• putc
• putchar
• puts
• vfprintf
• vprintf
• write

When the write target is stdout or stderr, output is redirect to the JavaScript console. You can use __zigar.connect() to redirect it to a function of your choice.

Redirection only applies to the module in question. Calls made by shared libraries are unaffected.

When compiled for WebAssembly, output is sent to JavaScript through WASI.