ref: 30d5a2c869c5f47cca98fdedb9024d462c6b9191
dir: /lib/c/fopen.c/
#include <errno.h> #include <stdio.h> #undef fopen FILE * fopen(const char * restrict name, const char * restrict mode) { FILE *fp; for (fp = __iob; fp < &__iob[FILE_MAX]; ++fp) { if (fp->flags & (_IOREAD | _IOWRITE | _IORW) == 0) break; } if (fp == &__iob[FILE_MAX]) { errno = ENOMEM; return NULL; } return _fpopen(name, mode, fp); }