Finita introduzione ai socket, con wrapper per read e write aggiunti.

[gapil.git] / sources / SockWrite.c

diff --git a/sources/SockWrite.c b/sources/SockWrite.c
new file mode 100644 (file)
index 0000000..ddeb4c7
--- /dev/null
+++ b/sources/SockWrite.c
@@ -0,0 +1,22 @@
+#include <unistd.h>
+
+ssize_t SockWrite(int fd, const void *buf, size_t count) 
+{
+    size_t nleft;
+    ssize_t nwritten;
+
+    nleft = count;
+    while (nleft > 0) {             /* repeat until no left */
+       if ( (nwritten = write(fd, buf, nleft)) < 0) {
+           if (errno == EINTR) {   /* if interrupted by system call */
+               continue;           /* repeat the loop */
+           } else {
+               return(nwritten);   /* otherwise exit with error */
+           }
+       }
+       nleft -= nwritten;          /* set left to write */
+       buf +=nwritten;             /* set pointer */
+    }
+    return (count);
+}
+