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avrdude: Fixes in error handling

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This commit is contained in:
Vojtech Kral 2018-05-16 14:42:36 +02:00
parent 97b3c38148
commit 404fdbcfdf
3 changed files with 46 additions and 12 deletions
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25
xs/src/avrdude/ser_posix.c
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@ -47,6 +47,7 @@
#include "libavrdude.h"
long serial_recv_timeout = 5000; /* ms */
#define MAX_ZERO_READS 512
struct baud_mapping {
long baud;
@ -363,6 +364,7 @@ static int ser_recv(union filedescriptor *fd, unsigned char * buf, size_t buflen
int rc;
unsigned char * p = buf;
size_t len = 0;
unsigned zero_reads = 0;
timeout.tv_sec = serial_recv_timeout / 1000L;
timeout.tv_usec = (serial_recv_timeout % 1000L) * 1000;
@ -397,9 +399,18 @@ static int ser_recv(union filedescriptor *fd, unsigned char * buf, size_t buflen
avrdude_message(MSG_INFO, "%s: ser_recv(): read error: %s\n",
progname, strerror(errno));
return -1;
} else if (rc == 0) {
zero_reads++;
if (zero_reads > MAX_ZERO_READS) {
avrdude_message(MSG_NOTICE2, "%s: ser_recv(): programmer is not responding (too many zero reads)\n",
progname);
return -1;
}
} else {
zero_reads = 0;
p += rc;
len += rc;
}
p += rc;
len += rc;
}
p = buf;
@ -435,6 +446,7 @@ static int ser_drain(union filedescriptor *fd, int display)
int nfds;
int rc;
unsigned char buf;
unsigned zero_reads = 0;
timeout.tv_sec = 0;
timeout.tv_usec = 250000;
@ -472,6 +484,15 @@ static int ser_drain(union filedescriptor *fd, int display)
avrdude_message(MSG_INFO, "%s: ser_drain(): read error: %s\n",
progname, strerror(errno));
return -1;
} else if (rc == 0) {
zero_reads++;
if (zero_reads > MAX_ZERO_READS) {
avrdude_message(MSG_NOTICE2, "%s: ser_drain(): programmer is not responding (too many zero reads)\n",
progname);
return -1;
}
} else {
zero_reads = 0;
}
if (display) {
avrdude_message(MSG_INFO, "%02x ", buf);