static int open_self_cmdline(void *cpu_env, int fd) { int fd_orig = -1; bool word_skipped = false; fd_orig = open("/proc/self/cmdline", O_RDONLY); if (fd_orig < 0) { return fd_orig; } while (true) { ssize_t nb_read; char buf[128]; char *cp_buf = buf; nb_read = read(fd_orig, buf, sizeof(buf)); if (nb_read < 0) { fd_orig = close(fd_orig); return -1; } else if (nb_read == 0) { break; } if (!word_skipped) { /* Skip the first string, which is the path to qemu-*-static instead of the actual command. */ cp_buf = memchr(buf, 0, sizeof(buf)); if (cp_buf) { /* Null byte found, skip one string */ cp_buf++; nb_read -= cp_buf - buf; word_skipped = true; } } if (word_skipped) { if (write(fd, cp_buf, nb_read) != nb_read) { return -1; } } } return close(fd_orig); }