ref: d7c503ac9d395a3dbda13c4f2cb1265811df16e1
dir: /inc/ar.h/
#define ARMAG "!<arch>\n" /* ar "magic number" */
#define SARMAG 8 /* strlen(ARMAG); */
#define ARFMAG "`\n"
#define SARNAM 16
struct ar_hdr {
char ar_name[SARNAM]; /* name */
char ar_date[12]; /* modification time */
char ar_uid[6]; /* user id */
char ar_gid[6]; /* group id */
char ar_mode[8]; /* octal file permissions */
char ar_size[10]; /* size in bytes */
char ar_fmag[2]; /* consistency check */
};