Set HTTP_USER_AGENT envvar in pacman

Instead of using libdownload's default user agent string, make one of
our own.

Format:
Pacman/3.0.1 (Linux i686 2.6.21-rc7-ARCH; en_US.utf8) libalpm/1.0.0

Signed-off-by: Dan McGee <dan@archlinux.org>

1 files changed, 20 insertions, 0 deletions

diff --git a/src/pacman/pacman.c b/src/pacman/pacman.c
index 8f640c8e..1f5c5aed 100644
--- a/src/pacman/pacman.c
+++ b/src/pacman/pacman.c
@@ -31,6 +31,7 @@
 #include <unistd.h>
 #include <sys/types.h>
 #include <sys/stat.h>
+#include <sys/utsname.h>
 #include <libintl.h>
 #include <locale.h>
 #include <mcheck.h> /* debug tracing (mtrace) */
@@ -191,6 +192,22 @@ static void localize(void)
 }
 
 /**
+ * @brief Set user agent environment variable.
+ */
+static void setuseragent(void)
+{
+	const char *pacman = "Pacman/" PACKAGE_VERSION;
+	const char *libalpm = "libalpm/" LIB_VERSION;
+	char agent[101];
+	struct utsname un;
+
+	uname(&un);
+	snprintf(agent, 100, "%s (%s %s %s; %s) %s", pacman, un.sysname,
+	         un.machine, un.release, setlocale(LC_MESSAGES, NULL), libalpm);
+	setenv("HTTP_USER_AGENT", agent, 0);
+}
+
+/**
  * @brief Catches thrown signals.
  *        Performs necessary cleanup to ensure database is in a consistant
  *        state.
@@ -462,6 +479,9 @@ int main(int argc, char *argv[])
 	/* i18n init */
 	localize();
 
+	/* set user agent for downloading */
+	setuseragent();
+
 	/* init config data */
 	config = config_new();
 	config->op = PM_OP_MAIN;