various: appease the ubuntu gcc monster

Silence warnings about not checking
return values from read and write system calls.

R=r, r2
CC=golang-dev
https://golang.org/cl/2258045

4 files changed, 13 insertions, 3 deletions

diff --git a/src/cmd/ld/elf.c b/src/cmd/ld/elf.c
index 0ebdcf024c..4286349dbe 100644
--- a/src/cmd/ld/elf.c
+++ b/src/cmd/ld/elf.c
@@ -316,7 +316,7 @@ elfwriteinterp(void)
 
 	n = strlen(interp)+1;
 	seek(cout, ELFRESERVE-n, 0);
-	write(cout, interp, n);
+	ewrite(cout, interp, n);
 	return n;
 }
 
diff --git a/src/cmd/ld/lib.c b/src/cmd/ld/lib.c
index 0cdc6778fc..3e755d7f96 100644
--- a/src/cmd/ld/lib.c
+++ b/src/cmd/ld/lib.c
@@ -924,3 +924,12 @@ addsection(Segment *seg, char *name, int rwx)
 	*l = sect;
 	return sect;
 }
+
+void
+ewrite(int fd, void *buf, int n)
+{
+	if(write(fd, buf, n) < 0) {
+		diag("write error: %r");
+		errorexit();
+	}
+}
diff --git a/src/cmd/ld/lib.h b/src/cmd/ld/lib.h
index 092161e14b..b828bed6ea 100644
--- a/src/cmd/ld/lib.h
+++ b/src/cmd/ld/lib.h
@@ -128,6 +128,7 @@ void	ldpkg(Biobuf*, char*, int64, char*, int);
 void	mark(Sym *s);
 char*	expandpkg(char*, char*);
 void	deadcode(void);
+void	ewrite(int, void*, int);
 
 int	pathchar(void);
 void*	mal(uint32);
diff --git a/src/cmd/ld/macho.c b/src/cmd/ld/macho.c
index 407fb553d4..b3b1f8c497 100644
--- a/src/cmd/ld/macho.c
+++ b/src/cmd/ld/macho.c
@@ -430,8 +430,8 @@ domacholink(void)
 			}
 		}
 
-		write(cout, linkdata, nlinkdata);
-		write(cout, strtab, nstrtab);
+		ewrite(cout, linkdata, nlinkdata);
+		ewrite(cout, strtab, nstrtab);
 	}
 	return rnd(nlinkdata+nstrtab, INITRND);
 }