FreeCalypso > hg > freecalypso-tools
view loadtools/tpinterfb.c @ 665:b43d8c2725b9
fc-loadtool flash program-bin changed to use binary protocol
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Sat, 07 Mar 2020 18:34:39 +0000 |
parents | 141372e0d28f |
children | 8d7dcfd9df53 |
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/* * This module contains functions for binary (as opposed to our usual ASCII) * interfacing to loadagent. */ #include <sys/types.h> #include <sys/time.h> #include <sys/errno.h> #include <stdio.h> #include <string.h> #include <strings.h> #include <stdlib.h> extern int errno; extern int target_fd; collect_binblock_from_target(buf, expect_len, timeout) u_char *buf; unsigned expect_len; { fd_set fds; struct timeval tv; unsigned rcvd; int cc; for (rcvd = 0; rcvd < expect_len; ) { FD_ZERO(&fds); FD_SET(target_fd, &fds); tv.tv_sec = timeout; tv.tv_usec = 0; cc = select(target_fd+1, &fds, NULL, NULL, &tv); if (cc < 0) { if (errno == EINTR) continue; perror("select"); return(-1); } if (cc < 1) { fprintf(stderr, "error: timeout waiting for binary block\n"); return(-1); } cc = read(target_fd, buf + rcvd, expect_len - rcvd); if (cc <= 0) { perror("read after successful select"); return(-1); } rcvd += cc; } return(0); }