kconfig: Fix warning: ignoring return value of 'fwrite'

This fix facilitates fwrite() in both confdata.c and expr.c, either it
succeeds in writing, or an error occurs, or the end of file is reached.

Signed-off-by: Jean Sacren <sakiwit@gmail.com>
Signed-off-by: Michal Marek <mmarek@suse.cz>

diff --git a/scripts/kconfig/confdata.c b/scripts/kconfig/confdata.c
index ac13f0ff8e811e521e884a3811fdddd090fe64a7..c39327e60ea499919937fae08a8d5bc5dc9c4fd9 100644 (file)
--- a/scripts/kconfig/confdata.c
+++ b/scripts/kconfig/confdata.c
@@ -412,7 +412,7 @@ static void conf_write_string(bool headerfile, const char *name,
        while (1) {
                l = strcspn(str, "\"\\");
                if (l) {
-                       fwrite(str, l, 1, out);
+                       xfwrite(str, l, 1, out);
                        str += l;
                }
                if (!*str)

diff --git a/scripts/kconfig/expr.c b/scripts/kconfig/expr.c
index 8f18e37892cb42152ddda716edb6ae4f5592e7ac..330e7c0048a85ea1939562e724eaa7f2326d56ab 100644 (file)
--- a/scripts/kconfig/expr.c
+++ b/scripts/kconfig/expr.c
@@ -1087,7 +1087,7 @@ void expr_print(struct expr *e, void (*fn)(void *, struct symbol *, const char *
 
 static void expr_print_file_helper(void *data, struct symbol *sym, const char *str)
 {
-       fwrite(str, strlen(str), 1, data);
+       xfwrite(str, strlen(str), 1, data);
 }
 
 void expr_fprint(struct expr *e, FILE *out)

diff --git a/scripts/kconfig/lkc.h b/scripts/kconfig/lkc.h
index 76db065ed72c069aa4371d875bdcfe71c96a9316..2ac33f5d273c0e7e4c41197f933ec2c593ce2571 100644 (file)
--- a/scripts/kconfig/lkc.h
+++ b/scripts/kconfig/lkc.h
@@ -80,6 +80,13 @@ void sym_set_change_count(int count);
 void sym_add_change_count(int count);
 void conf_set_all_new_symbols(enum conf_def_mode mode);
 
+/* confdata.c and expr.c */
+static inline void xfwrite(const void *str, size_t len, size_t count, FILE *out)
+{
+       if (fwrite(str, len, count, out) < count)
+               fprintf(stderr, "\nError in writing or end of file.\n");
+}
+
 /* kconfig_load.c */
 void kconfig_load(void);