Helmet

text_helmet¶

Protect header lines from being filtered by downstream pipes. Reads stdin into an array, emits the first n lines (default: 1) to stderr, and the remainder to stdout. This keeps header lines visible even when stdout is piped to grep or similar filters.

Example¶

df -hP | helmet | grep shm
df -hP | helmet 2 | grep shm

Arguments¶

• $1 (int): Optional: number of header lines to protect (default: 1)

Exit codes¶

• 0: Always

Output on stdout¶

• Input lines after the protected header lines

helmet¶

Alias for text_helmet.