Do not use signal when using lwIP

NeroReflex · Denis Benato · commit 5bfdf430a872 · 2025-01-14T10:36:09.000Z
The lwIP library does not generate SIGPIPE and platforms supporting lwIP might not have a valid implementation of signal: avoid using signal in these circumstances.

Signed-off-by: Denis Benato &lt;benato.denis96@gmail.com&gt;
diff --git a/MQTTClient-C/src/linux/MQTTLinuxNetwork.c b/MQTTClient-C/src/linux/MQTTLinuxNetwork.c
@@ -66,7 +66,9 @@ static int linux_write(Network* n, unsigned char* buffer, int len, int timeout_m
 
 void NetworkInit(Network* n)
 {
+#if !defined(LWIP_SOCKET)
 	signal(SIGPIPE, SIG_IGN);
+#endif
 	n->my_socket = 0;
 	n->mqttread = linux_read;
 	n->mqttwrite = linux_write;
diff --git a/MQTTClient/src/linux/linux.cpp b/MQTTClient/src/linux/linux.cpp
@@ -39,7 +39,9 @@ class IPStack
 public:
   IPStack()
   {
+#if !defined(LWIP_SOCKET)
 		signal(SIGPIPE, SIG_IGN);
+#endif
   }
 
   int connect(const char* hostname, int port)

Original file line number	Diff line number	Diff line change
`@@ -66,7 +66,9 @@ static int linux_write(Network* n, unsigned char* buffer, int len, int timeout_m`
`66`	`66`
`67`	`67`	`void NetworkInit(Network* n)`
`68`	`68`	`{`
	`69`	`+#if !defined(LWIP_SOCKET)`
`69`	`70`	`signal(SIGPIPE, SIG_IGN);`
	`71`	`+#endif`
`70`	`72`	`n->my_socket = 0;`
`71`	`73`	`n->mqttread = linux_read;`
`72`	`74`	`n->mqttwrite = linux_write;`
Original file line number	Diff line number	Diff line change
`@@ -39,7 +39,9 @@ class IPStack`
`39`	`39`	`public:`
`40`	`40`	`IPStack()`
`41`	`41`	`{`
	`42`	`+#if !defined(LWIP_SOCKET)`
`42`	`43`	`signal(SIGPIPE, SIG_IGN);`
	`44`	`+#endif`
`43`	`45`	`}`
`44`	`46`
`45`	`47`	`int connect(const char* hostname, int port)`