uemacs: input.c: Fix mkstemp warning.

Fix the following warning:

input.c: In function ‘getstring’:
input.c:590: warning: ignoring return value of ‘mkstemp’, declared with attribute warn_unused_result

This add usage.c module for die function.
This also add wrapper.c module for the xmkstemp that is wrapper function
around the original mkstemp function.

Both module codes was largelly based on git, linux and sparse codes.

Signed-off-by: Thiago Farina <tfransosi@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

6 files changed, 61 insertions, 9 deletions

diff --git a/Makefile b/Makefile
index e73c883..cbe920f 100644
--- a/Makefile
+++ b/Makefile
@@ -19,12 +19,14 @@ PROGRAM=em
 SRC=ansi.c basic.c bind.c buffer.c crypt.c display.c eval.c exec.c \
 	file.c fileio.c ibmpc.c input.c isearch.c line.c lock.c main.c \
 	pklock.c posix.c random.c region.c search.c spawn.c tcap.c \
-	termio.c vmsvt.c vt52.c window.c word.c names.c globals.c version.c
+	termio.c vmsvt.c vt52.c window.c word.c names.c globals.c version.c \
+	usage.c wrapper.c
 
 OBJ=ansi.o basic.o bind.o buffer.o crypt.o display.o eval.o exec.o \
 	file.o fileio.o ibmpc.o input.o isearch.o line.o lock.o main.o \
 	pklock.o posix.o random.o region.o search.o spawn.o tcap.o \
-	termio.o vmsvt.o vt52.o window.o word.o names.o globals.o version.o
+	termio.o vmsvt.o vt52.o window.o word.o names.o globals.o version.o \
+	usage.o wrapper.o
 
 HDR=ebind.h edef.h efunc.h epath.h estruct.h evar.h util.h version.h
 
diff --git a/input.c b/input.c
index 154c2c9..28d6ada 100644
--- a/input.c
+++ b/input.c
@@ -1,4 +1,4 @@
-/*	INPUT.C
+/*	input.c
  *
  *	Various input routines
  *
@@ -6,11 +6,13 @@
  *	modified by Petri Kutvonen
  */
 
-#include	<stdio.h>
-#include	<unistd.h>
-#include	"estruct.h"
-#include	"edef.h"
-#include	"efunc.h"
+#include <stdio.h>
+#include <unistd.h>
+
+#include "estruct.h"
+#include "edef.h"
+#include "efunc.h"
+#include "wrapper.h"
 
 #if	PKCODE
 #if     MSDOS && TURBO
@@ -587,7 +589,7 @@ int getstring(char *prompt, char *buf, int nbuf, int eolchar)
 				if (!iswild)
 					strcat(ffbuf, "*");
 				strcat(ffbuf, " >");
-				mkstemp(tmp);
+				xmkstemp(tmp);
 				strcat(ffbuf, tmp);
 				strcat(ffbuf, " 2>&1");
 				system(ffbuf);
diff --git a/usage.c b/usage.c
new file mode 100644
index 0000000..0ae18ce
--- /dev/null
+++ b/usage.c
@@ -0,0 +1,22 @@
+#include "usage.h"
+
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+static void report(const char* prefix, const char *err, va_list params)
+{
+	char msg[4096];
+	vsnprintf(msg, sizeof(msg), err, params);
+	fprintf(stderr, "%s%s\n", prefix, msg);
+}
+
+void die(const char* err, ...)
+{
+	va_list params;
+
+	va_start(params, err);
+	report("fatal: ", err, params);
+	va_end(params);
+	exit(128);
+}
diff --git a/usage.h b/usage.h
new file mode 100644
index 0000000..bb6b40e
--- /dev/null
+++ b/usage.h
@@ -0,0 +1,6 @@
+#ifndef USAGE_H_
+#define USAGE_H_
+
+extern void die(const char* err, ...);
+
+#endif  /* USAGE_H_ */
diff --git a/wrapper.c b/wrapper.c
new file mode 100644
index 0000000..4bf8d7e
--- /dev/null
+++ b/wrapper.c
@@ -0,0 +1,14 @@
+#include "usage.h"
+
+#include <stdlib.h>
+
+/* Function copyright: git */
+int xmkstemp(char *template)
+{
+	int fd;
+
+	fd = mkstemp(template);
+	if (fd < 0)
+		die("Unable to create temporary file");
+	return fd;
+}
diff --git a/wrapper.h b/wrapper.h
new file mode 100644
index 0000000..0db3b8f
--- /dev/null
+++ b/wrapper.h
@@ -0,0 +1,6 @@
+#ifndef WRAPPER_H_
+#define WRAPPER_H_
+
+extern int xmkstemp(char *template);
+
+#endif  /* WRAPPER_H_ */