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Permit ENOENT for /dev/bpf as on macOS. Fixes #3127

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dmiller
2025-06-05 22:22:27 +00:00
parent 671b6490bf
commit 7c4e1bf58d
1 changed files with 8 additions and 1 deletions
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9
libdnet-stripped/src/eth-bsd.c
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@@ -42,6 +42,7 @@ eth_open(const char *device)
struct ifreq ifr;
eth_t *e;
int i;
int enoent_ok = 1;
if ((e = calloc(1, sizeof(*e))) != NULL) {
char file[32] = "/dev/bpf";
@@ -51,7 +52,13 @@ eth_open(const char *device)
from seeing incoming traffic, even in other
processes. */
e->fd = open(file, O_RDWR);
if (e->fd != -1 || errno != EBUSY)
if (e->fd != -1)
break;
/* /dev/bpf may not exist, but some contiguous range from /dev/bpf1 will.
* After we've seen one valid device, ENOENT becomes meaningful. */
if (errno == EBUSY)
enoent_ok = 0;
else if (errno != ENOENT || !enoent_ok)
break;
snprintf(file, sizeof(file), "/dev/bpf%d", i);
}