Fix/clarify utilisations of 'char' (thanks Esben Haabendal)

5 files changed, 10 insertions, 10 deletions

diff --git a/src/libstddjb/child_spawn.c b/src/libstddjb/child_spawn.c
index 18cee96..addc7cd 100644
--- a/src/libstddjb/child_spawn.c
+++ b/src/libstddjb/child_spawn.c
@@ -138,8 +138,8 @@ pid_t child_spawn (char const *prog, char const *const *argv, char const *const
 
   syncdie:
     {
-      char c = errno ;
-      fd_write(syncpipe[1], &c, 1) ;
+      unsigned char c = errno ;
+      fd_write(syncpipe[1], (char const *)&c, 1) ;
     }
     _exit(127) ;
   }
diff --git a/src/libstddjb/mininetstring_read.c b/src/libstddjb/mininetstring_read.c
index 6a38523..f7c7a55 100644
--- a/src/libstddjb/mininetstring_read.c
+++ b/src/libstddjb/mininetstring_read.c
@@ -22,8 +22,8 @@ int mininetstring_read (int fd, stralloc *sa, uint32 *w)
   }
   if (*w & (1U << 31))
   {
-    char c ;
-    switch (fd_read(fd, &c, 1))
+    unsigned char c ;
+    switch (fd_read(fd, (char *)&c, 1))
     {
       case -1 : return -1 ;
       case 0 : return (errno = EPIPE, -1) ;
diff --git a/src/libstddjb/mininetstring_write.c b/src/libstddjb/mininetstring_write.c
index cb3c30e..5eddc7b 100644
--- a/src/libstddjb/mininetstring_write.c
+++ b/src/libstddjb/mininetstring_write.c
@@ -23,8 +23,8 @@ int mininetstring_write (int fd, char const *s, uint16 len, uint32 *w)
   }
   if (*w & (1U << 31))
   {
-    char c = len & 0xFFU ;
-    switch (fd_write(fd, &c, 1))
+    unsigned char c = len & 0xFFU ;
+    switch (fd_write(fd, (char const *)&c, 1))
     {
       case -1 : return -1 ;
       case 0 : return (errno = EAGAIN, -1) ;
diff --git a/src/libstddjb/selfpipe_internal.c b/src/libstddjb/selfpipe_internal.c
index e5d5d95..f65e07a 100644
--- a/src/libstddjb/selfpipe_internal.c
+++ b/src/libstddjb/selfpipe_internal.c
@@ -22,8 +22,8 @@ int selfpipe[2] = { -1, -1 } ;
 
 static void selfpipe_trigger (int s)
 {
-  char c = (char)s ;
-  fd_write(selfpipe[1], &c, 1) ;
+  unsigned char c = (unsigned char)s ;
+  fd_write(selfpipe[1], (char *)&c, 1) ;
 }
 
 struct skasigaction const selfpipe_ssa = { &selfpipe_trigger, SKASA_NOCLDSTOP | SKASA_MASKALL } ;
diff --git a/src/libstddjb/sgetopt.c b/src/libstddjb/sgetopt.c
index 3f94c93..f576689 100644
--- a/src/libstddjb/sgetopt.c
+++ b/src/libstddjb/sgetopt.c
@@ -9,7 +9,7 @@
 
 int sgetopt_r (int argc, char const *const *argv, char const *opts, subgetopt_t *o)
 {
-  char c = (char)subgetopt_r(argc, argv, opts, o) ;
+  int c = subgetopt_r(argc, argv, opts, o) ;
   if (o->err && ((c == '?') || (c == ':')))
   {
     buffer_puts(buffer_2, o->prog ? o->prog : argv[0]) ;
@@ -18,5 +18,5 @@ int sgetopt_r (int argc, char const *const *argv, char const *opts, subgetopt_t
      "illegal option" : "option requires an argument") ;
     buffer_putflush(buffer_2, "\n", 1) ;
   }
-  return (int)c ;
+  return c ;
 }