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Linux: Check return values of posix read/write

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Fixes #29849, for real this time.
This commit is contained in:
Martin Capitanio
2019-06-19 10:41:07 +02:00
parent d2f38dbb28
commit ce1c840635
2 changed files with 11 additions and 7 deletions
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14
platform/x11/detect_prime.cpp
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@@ -159,10 +159,11 @@ int detect_prime() {
if (!stat_loc) {
// No need to do anything complicated here. Anything less than
// PIPE_BUF will be delivered in one read() call.
read(fdset[0], string, sizeof(string) - 1);
vendors[i] = string;
renderers[i] = string + strlen(string) + 1;
// Leave it 'Unknown' otherwise.
if (read(fdset[0], string, sizeof(string) - 1) > 0) {
vendors[i] = string;
renderers[i] = string + strlen(string) + 1;
}
}
close(fdset[0]);
@@ -190,8 +191,9 @@ int detect_prime() {
memcpy(&string, vendor, vendor_len);
memcpy(&string[vendor_len], renderer, renderer_len);
write(fdset[1], string, vendor_len + renderer_len);
if (write(fdset[1], string, vendor_len + renderer_len) == -1) {
print_verbose("Couldn't write vendor/renderer string.");
}
close(fdset[1]);
exit(0);
}