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select: avoid returning an error on EINTR from select() or poll()

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This was already done for the poll() and select() calls
made directly from Curl_poll(), but was missed in
Curl_wait_ms(), which is called when there are no fds
to wait on.

Fixes #11135
Closes #11143
This commit is contained in:
Antoine Pitrou 2023-05-18 21:39:05 +02:00 • committed by Daniel Stenberg
parent 5b4bcc6ede
commit d65321f939
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GPG key ID: 5CC908FDB71E12C2
1 changed files with 9 additions and 4 deletions
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13
lib/select.c
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@ -61,8 +61,8 @@
* for the intended use of this function in the library.
*
* Return values:
* -1 = system call error, invalid timeout value, or interrupted
* 0 = specified timeout has elapsed
* -1 = system call error, or invalid timeout value
* 0 = specified timeout has elapsed, or interrupted
*/
int Curl_wait_ms(timediff_t timeout_ms)
{
@ -99,8 +99,13 @@ int Curl_wait_ms(timediff_t timeout_ms)
}
#endif /* HAVE_POLL_FINE */
#endif /* USE_WINSOCK */
if(r)
r = -1;
if(r) {
if((r == -1) && (SOCKERRNO == EINTR))
/* make EINTR from select or poll not a "lethal" error */
r = 0;
else
r = -1;
}
return r;
}