Attachment 204249 Details for Bug 237778 – file to reproduce the problem

file to reproduce the problem

bad_name.c (text/plain), 1.28 KB, created by Alfonso S. Siciliano on 2019-05-07 21:54:25 UTC

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Creator: Alfonso S. Siciliano

Created: 2019-05-07 21:54:25 UTC

Size: 1.28 KB

patch

obsolete

>/* bad_name.c
> *
> * % cc bad_name.c -o bad_name
> * % ./bad_name
> * id: [5]: 1.1.100.500.1000
> * error: 0, buflen: 25
> * error: 0, buflen: 25, name: kern.ostype.100.500.1000
> * % 
> *
> * error = 0 is a false positive and "kern.ostype.100.500.1000" is a fake name.
> */
>
>#include <sys/types.h>
>#include <sys/sysctl.h>
>
>#include <stdio.h>
>#include <string.h>
>
>#define BUFSIZE    1024
>
>int
>sysctl_get_name(int *id, size_t idlevel, char *name, size_t *namelen)
>{
>    int mib[CTL_MAXNAME + 2];
>    int error = 0;
>
>    mib[0] = 0;
>    mib[1] = 1;
>    memcpy(mib + 2, id, idlevel * sizeof(int));
>    error = sysctl(mib, idlevel + 2, (void *)name, namelen, NULL, 0);
>
>    return (error);
>}
>
>int main()
>{
>    int id[CTL_MAXNAME], i, error;
>    char buf[BUFSIZE];
>    size_t idlevel, buflen;
>    
>    id[0]=1;
>    id[1]=1;
>    id[2]=100;
>    id[3]=500;
>    id[4]=1000;
>    idlevel=5;
>
>    printf("id: [%zu]: ", idlevel);
>    for (i = 0; i < idlevel; i++)
>	printf("%d%c", id[i], i+1 < idlevel ? '.' : '\n');
> 
>    buflen = 0;
>    error = sysctl_get_name(id, idlevel, NULL ,&buflen);
>    printf("error: %d, buflen: %zu\n", error, buflen);
>    
>    memset(buf, 0, sizeof(buf));
>    error = sysctl_get_name(id, idlevel, buf, &buflen);
>    printf("error: %d, buflen: %zu, name: %s\n", error, buflen, buf);
>
>    return (0);
>}
>
>

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Attachments on bug 237778: 204249