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Aded kernelinfo(1) as a frontend of kernelinfo(2).

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This commit is contained in:
Jonas 'Sortie' Termansen 2012-03-07 18:20:40 +01:00
parent a7658d5b8c
commit 87248fbce9
2 changed files with 60 additions and 0 deletions
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1
utils/Makefile
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@ -19,6 +19,7 @@ help \
uptime \
memstat \
uname \
kernelinfo \
idle \
editor \
kill \

59
utils/kernelinfo.cpp Normal file
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@ -0,0 +1,59 @@
#include <sys/kernelinfo.h>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <errno.h>
#include <error.h>
void usage(const char* argv0)
{
printf("usage: %s <REQUEST> ...\n", argv0);
printf("Prints a kernel information string.\n");
printf("example: %s name\n", argv0);
printf("example: %s version\n", argv0);
printf("example: %s builddate\n", argv0);
printf("example: %s buildtime\n", argv0);
}
void help(const char* argv0)
{
usage(argv0);
}
void version(const char* argv0)
{
usage(argv0);
}
int main(int argc, char* argv[])
{
const char* argv0 = argv[0];
if ( argc < 2 ) { usage(argv0); return 0; }
for ( int i = 1; i < argc; i++ )
{
if ( argv[i][0] != '-' ) { continue; }
if ( strcmp(argv[i], "--usage") == 0 ) { usage(argv0); return 0; }
if ( strcmp(argv[i], "--help") == 0 ) { help(argv0); return 0; }
if ( strcmp(argv[i], "--version") == 0 ) { version(argv0); return 0; }
fprintf(stderr, "%s: unknown option: %s\n", argv0, argv[i]);
return 1;
}
size_t bufsize = 32;
char* buf = (char*) malloc(bufsize);
if ( !buf ) { perror("malloc"); return 1; }
for ( int i = 1; i < argc; i++ )
{
retry:
ssize_t ret = kernelinfo(argv[i], buf, bufsize);
if ( ret < 0 ) { error(1, errno, "kernelinfo(\"%s\")", argv[i]); }
if ( ret )
{
buf = (char*) realloc(buf, ret);
if ( !buf ) { perror("realloc"); return 1; }
bufsize = ret;
goto retry;
}
printf("%s\n", buf);
}
return 0;
}