Make kernel identification (`ident' in the config(8) driver) available to

userland, and the kernel.  In the kernel by way of the 'ident[]' variable
akin to all the other stuff generated by newvers.sh.  In userland it is
available to sysctl consumers via KERN_IDENT or 'kern.ident'.  It is exported
by uname(1) by the -i flag.

Reviewed by:	hackers@

1 files changed, 14 insertions, 4 deletions

diff --git a/usr.bin/uname/uname.c b/usr.bin/uname/uname.c
index a80d4f30ea2b..b650ebf4d14c 100644
--- a/usr.bin/uname/uname.c
+++ b/usr.bin/uname/uname.c
@@ -60,10 +60,12 @@ static const char sccsid[] = "@(#)uname.c	8.2 (Berkeley) 5/4/95";
 #define	RFLAG	0x08
 #define	SFLAG	0x10
 #define	VFLAG	0x20
+#define	IFLAG	0x40
 
 typedef void (*get_t)(void);
-get_t get_platform, get_hostname, get_arch, get_release, get_sysname, get_version;
+get_t get_ident, get_platform, get_hostname, get_arch, get_release, get_sysname, get_version;
 
+void native_ident(void);
 void native_platform(void);
 void native_hostname(void);
 void native_arch(void);
@@ -74,7 +76,7 @@ void print_uname(u_int);
 void setup_get(void);
 void usage(void);
 
-char *platform, *hostname, *arch, *release, *sysname, *version;
+char *ident, *platform, *hostname, *arch, *release, *sysname, *version;
 int space;
 
 int
@@ -86,11 +88,14 @@ main(int argc, char *argv[])
 	setup_get();
 	flags = 0;
 
-	while ((ch = getopt(argc, argv, "amnprsv")) != -1)
+	while ((ch = getopt(argc, argv, "aimnprsv")) != -1)
 		switch(ch) {
 		case 'a':
 			flags |= (MFLAG | NFLAG | RFLAG | SFLAG | VFLAG);
 			break;
+		case 'i':
+			flags |= IFLAG;
+			break;
 		case 'm':
 			flags |= MFLAG;
 			break;
@@ -145,6 +150,7 @@ setup_get(void)
 	CHECK_ENV("v", version);
 	CHECK_ENV("m", platform);
 	CHECK_ENV("p", arch);
+	CHECK_ENV("i", ident);
 }
 
 #define	PRINT_FLAG(flags,flag,var)		\
@@ -167,6 +173,7 @@ print_uname(u_int flags)
 	PRINT_FLAG(flags, VFLAG, version);
 	PRINT_FLAG(flags, MFLAG, platform);
 	PRINT_FLAG(flags, PFLAG, arch);
+	PRINT_FLAG(flags, IFLAG, ident);
 	printf("\n");
 }
 
@@ -218,9 +225,12 @@ NATIVE_SYSCTL2_GET(platform, CTL_HW, HW_MACHINE) {
 NATIVE_SYSCTL2_GET(arch, CTL_HW, HW_MACHINE_ARCH) {
 } NATIVE_SET;
 
+NATIVE_SYSCTL2_GET(ident, CTL_KERN, KERN_IDENT) {
+} NATIVE_SET;
+
 void
 usage(void)
 {
-	fprintf(stderr, "usage: uname [-amnprsv]\n");
+	fprintf(stderr, "usage: uname [-aimnprsv]\n");
 	exit(1);
 }