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Inspired by Martijn Koster's patch and example source at

Browse source 
http://www.greenhills.co.uk/mak/gentoo/curl-eintr-bug.c, I now made the
select() and poll() calls properly loop if they return -1 and errno is
EINTR. glibc docs for this is found here:
http://www.gnu.org/software/libc/manual/html_node/Interrupted-Primitives.html

This last link says BSD doesn't have this "effect". Will there be a problem
if we do this unconditionally?
S: ----------------------------------------------------------------------
This commit is contained in:
Daniel Stenberg 2005-01-13 21:51:48 +00:00
parent 246ea56eab
commit 0e26355348
3 changed files with 29 additions and 8 deletions
Download patch file Download diff file Expand all files Collapse all files

23
lib/select.c
View file

@ -23,6 +23,8 @@
#include "setup.h"
#include <errno.h>
#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
@ -80,7 +82,9 @@ int Curl_select(curl_socket_t readfd, curl_socket_t writefd, int timeout_ms)
num++;
}
r = poll(pfd, num, timeout_ms);
do {
r = poll(pfd, num, timeout_ms);
} while((r == -1) && (errno == EINTR));
if (r < 0)
return -1;
@ -142,7 +146,9 @@ int Curl_select(curl_socket_t readfd, curl_socket_t writefd, int timeout_ms)
maxfd = writefd;
}
r = select(maxfd + 1, &fds_read, &fds_write, &fds_err, &timeout);
do {
r = select(maxfd + 1, &fds_read, &fds_write, &fds_err, &timeout);
} while((r == -1) && (errno == EINTR));
if (r < 0)
return -1;
@ -179,8 +185,11 @@ int Curl_select(curl_socket_t readfd, curl_socket_t writefd, int timeout_ms)
*/
int Curl_poll(struct pollfd ufds[], unsigned int nfds, int timeout_ms)
{
int r;
#ifdef HAVE_POLL_FINE
return poll(ufds, nfds, timeout_ms);
do {
r = poll(ufds, nfds, timeout_ms);
} while((r == -1) && (errno == EINTR));
#else
struct timeval timeout;
struct timeval *ptimeout;
@ -188,7 +197,6 @@ int Curl_poll(struct pollfd ufds[], unsigned int nfds, int timeout_ms)
fd_set fds_write;
fd_set fds_err;
curl_socket_t maxfd;
int r;
unsigned int i;
FD_ZERO(&fds_read);
@ -223,7 +231,9 @@ int Curl_poll(struct pollfd ufds[], unsigned int nfds, int timeout_ms)
ptimeout = &timeout;
}
r = select(maxfd + 1, &fds_read, &fds_write, &fds_err, ptimeout);
do {
r = select(maxfd + 1, &fds_read, &fds_write, &fds_err, ptimeout);
} while((r == -1) && (errno == EINTR));
if (r < 0)
return -1;
@ -244,7 +254,6 @@ int Curl_poll(struct pollfd ufds[], unsigned int nfds, int timeout_ms)
if (ufds[i].revents != 0)
r++;
}
return r;
#endif
return r;
}