Use send with MSG_NOSIGNAL instead of ignoring SIGPIPE.

gemi.c

@@ -2,7 +2,6 @@
 #include <stdio.h>
 #include <fcntl.h>
 #include <stdlib.h>
-#include <signal.h>
 #include <unistd.h>
 #include <dirent.h>
 #include <limits.h>
@@ -201,8 +200,6 @@ int main(int argc, char **argv)
         host_connect_error_message();
     }
 
-    signal(SIGPIPE, SIG_IGN);
-
     FILE *output_stream = stdout;
     struct pager_proc pager_info;
     if (pager) {

purr.c

@@ -1,5 +1,4 @@
 #define _POSIX_C_SOURCE 200112L /* getopt */
-#include <signal.h>
 #include <stdbool.h>
 #include <stdio.h>
 #include <stdlib.h>
@@ -277,8 +276,6 @@ int main (int argc, char **argv)
         host_connect_error_message();
         goto early_out;
     }
-    // avoid crashing on socket release
-    signal(SIGPIPE, SIG_IGN);
 
     const char *alpn = NULL;
     if (ssl) {

socket.c

@@ -1,4 +1,6 @@
 #include <unistd.h>
+#include <sys/types.h>
+#include <sys/socket.h>
 #include <errno.h>
 
 #include "purr.h"
@@ -22,7 +24,7 @@ int socket_write(void *ctx, const uint8_t *buf, size_t len)
 {
     int fd = *(int *)ctx;
     while (1) {
-        ssize_t wlen = write(fd, buf, len);
+        ssize_t wlen = send(fd, buf, len, MSG_NOSIGNAL);
         if (wlen <= 0) {
             if (wlen < 0 && errno == EINTR) {
                 continue;