Add a local implementation of hstrerror for the system which do not have it

The function converts the value of h_errno (last error of name
resolver library, see netdb.h).
One of systems which supposedly do not have the function is SunOS.
POSIX does not mandate its presence.

Signed-off-by: Alex Riesen <raa.lkml@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/Makefile b/Makefile
index fb11fa1987e162c13a9fba492da41e26fdad7195..862c2682aa39b424bb3349e4e885409c94a0df42 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -410,6 +410,7 @@ ifeq ($(uname_S),SunOS)
        NEEDS_NSL = YesPlease
        SHELL_PATH = /bin/bash
        NO_STRCASESTR = YesPlease
+       NO_HSTRERROR = YesPlease
        ifeq ($(uname_R),5.8)
                NEEDS_LIBICONV = YesPlease
                NO_UNSETENV = YesPlease
@@ -654,6 +655,10 @@ endif
 ifdef NO_PERL_MAKEMAKER
        export NO_PERL_MAKEMAKER
 endif
+ifdef NO_HSTRERROR
+       COMPAT_CFLAGS += -DNO_HSTRERROR
+       COMPAT_OBJS += compat/hstrerror.o
+endif
 
 ifeq ($(TCLTK_PATH),)
 NO_TCLTK=NoThanks

diff --git a/compat/hstrerror.c b/compat/hstrerror.c
new file mode 100644 (file)
index 0000000..069c555
--- /dev/null
+++ b/compat/hstrerror.c
@@ -0,0 +1,21 @@
+#include <string.h>
+#include <stdio.h>
+#include <netdb.h>
+
+const char *githstrerror(int err)
+{
+       static char buffer[48];
+       switch (err)
+       {
+       case HOST_NOT_FOUND:
+               return "Authoritative answer: host not found";
+       case NO_DATA:
+               return "Valid name, no data record of requested type";
+       case NO_RECOVERY:
+               return "Non recoverable errors, FORMERR, REFUSED, NOTIMP";
+       case TRY_AGAIN:
+               return "Non-authoritative \"host not found\", or SERVERFAIL";
+       }
+       sprintf(buffer, "Name resolution error %d", err);
+       return buffer;
+}

diff --git a/git-compat-util.h b/git-compat-util.h
index 6bd8987b2774774fbbd3747a2b571b66ad78727b..b2ab3f82567d54607a07f4061153adae86854fa9 100644 (file)
--- a/git-compat-util.h
+++ b/git-compat-util.h
@@ -167,6 +167,11 @@ extern size_t gitstrlcpy(char *, const char *, size_t);
 extern uintmax_t gitstrtoumax(const char *, char **, int);
 #endif
 
+#ifdef NO_HSTRERROR
+#define hstrerror githstrerror
+extern const char *githstrerror(int herror);
+#endif
+
 extern void release_pack_memory(size_t, int);
 
 static inline char* xstrdup(const char *str)