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Use some macro evil to create the functions for using sysctl(3) to get each

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variable natively.  It should allow you to use any sysctl mib set, but due
to limitations of what I can do with macros, right now it's limited to two,
which is all this program used anyway.

Sponsored by:	Bright Path Solutions
This commit is contained in:
Juli Mallett 2002-09-23 06:47:39 +00:00
parent fe4f1dfc8f
commit 5a4ba400c1
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=103846
1 changed files with 36 additions and 81 deletions
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117
usr.bin/uname/uname.c
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@ -84,6 +84,7 @@ main(int argc, char *argv[])
int ch;
setup_get();
flags = 0;
while ((ch = getopt(argc, argv, "amnprsv")) != -1)
switch(ch) {
@ -169,99 +170,53 @@ print_uname(u_int flags)
printf("\n");
}
void
native_sysname(void)
{
int mib[2];
size_t len;
static char buf[1024];
mib[0] = CTL_KERN;
mib[1] = KERN_OSTYPE;
len = sizeof(buf);
if (sysctl(mib, 2, &buf, &len, NULL, 0) == -1)
#define NATIVE_SYSCTL2_GET(var,mib0,mib1) \
void \
native_##var(void) \
{ \
int mib[] = { (mib0), (mib1) }; \
size_t len; \
static char buf[1024]; \
char **varp = &(var); \
\
len = sizeof buf; \
if (sysctl(mib, sizeof mib / sizeof mib[0], \
&buf, &len, NULL, 0) == -1) \
err(1, "sysctl");
sysname = buf;
}
void
native_hostname(void)
{
int mib[2];
size_t len;
static char buf[1024];
#define NATIVE_SET \
*varp = buf; \
return; \
} struct __hack
mib[0] = CTL_KERN;
mib[1] = KERN_HOSTNAME;
len = sizeof(buf);
if (sysctl(mib, 2, &buf, &len, NULL, 0) == -1)
err(1, "sysctl");
hostname = buf;
}
#define NATIVE_BUFFER (buf)
#define NATIVE_LENGTH (len)
void
native_release(void)
{
int mib[2];
size_t len;
static char buf[1024];
NATIVE_SYSCTL2_GET(sysname, CTL_KERN, KERN_OSTYPE) {
} NATIVE_SET;
mib[0] = CTL_KERN;
mib[1] = KERN_OSRELEASE;
len = sizeof(buf);
if (sysctl(mib, 2, &buf, &len, NULL, 0) == -1)
err(1, "sysctl");
release = buf;
}
NATIVE_SYSCTL2_GET(hostname, CTL_KERN, KERN_HOSTNAME) {
} NATIVE_SET;
void
native_version(void)
{
int mib[2];
size_t len, tlen;
NATIVE_SYSCTL2_GET(release, CTL_KERN, KERN_OSRELEASE) {
} NATIVE_SET;
NATIVE_SYSCTL2_GET(version, CTL_KERN, KERN_VERSION) {
size_t n;
char *p;
static char buf[1024];
mib[0] = CTL_KERN;
mib[1] = KERN_VERSION;
len = sizeof(buf);
if (sysctl(mib, 2, &buf, &len, NULL, 0) == -1)
err(1, "sysctl");
for (p = buf, tlen = len; tlen--; ++p)
p = NATIVE_BUFFER;
n = NATIVE_LENGTH;
for (; n--; ++p)
if (*p == '\n' || *p == '\t')
*p = ' ';
version = buf;
}
} NATIVE_SET;
void
native_platform(void)
{
int mib[2];
size_t len;
static char buf[1024];
NATIVE_SYSCTL2_GET(platform, CTL_HW, HW_MACHINE) {
} NATIVE_SET;
mib[0] = CTL_HW;
mib[1] = HW_MACHINE;
len = sizeof(buf);
if (sysctl(mib, 2, &buf, &len, NULL, 0) == -1)
err(1, "sysctl");
platform = buf;
}
void
native_arch(void)
{
int mib[2];
size_t len;
static char buf[1024];
mib[0] = CTL_HW;
mib[1] = HW_MACHINE_ARCH;
len = sizeof(buf);
if (sysctl(mib, 2, &buf, &len, NULL, 0) == -1)
err(1, "sysctl");
arch = buf;
}
NATIVE_SYSCTL2_GET(arch, CTL_HW, HW_MACHINE_ARCH) {
} NATIVE_SET;
void
usage(void)