static int
path_sibling( const char *path, ... )
{
int c;
long n;
int result = 0;
char s[2];
FILE *fp;
va_list ap;
va_start( ap, path );
fp = path_vfopen( "r", path, ap );
va_end( ap );
while ( ( c = fgetc( fp ) ) != EOF ) {
if ( isxdigit( c ) ) {
s[0] = ( char ) c;
s[1] = '\0';
for ( n = strtol( s, NULL, 16 ); n > 0; n /= 2 ) {
if ( n % 2 )
result++;
}
}
}
fclose( fp );
return result;
}
static cpu_set_t *
path_cpuparse(int maxcpus, int islist, const char *path, va_list ap)
{
FILE *fd;
cpu_set_t *set;
size_t setsize, len = maxcpus * 7;
char buf[len];
fd = path_vfopen("r" UL_CLOEXECSTR, 1, path, ap);
if (!fgets(buf, len, fd))
err(EXIT_FAILURE, _("cannot read %s"), pathbuf);
fclose(fd);
len = strlen(buf);
if (buf[len - 1] == '\n')
buf[len - 1] = '\0';
set = cpuset_alloc(maxcpus, &setsize, NULL);
if (!set)
err(EXIT_FAILURE, _("failed to callocate cpu set"));
if (islist) {
if (cpulist_parse(buf, set, setsize, 0))
errx(EXIT_FAILURE, _("failed to parse CPU list %s"), buf);
} else {
if (cpumask_parse(buf, set, setsize))
errx(EXIT_FAILURE, _("failed to parse CPU mask %s"), buf);
}
return set;
}
FILE *
path_fopen(const char *mode, int exit_on_error, const char *path, ...)
{
FILE *fd;
va_list ap;
va_start(ap, path);
fd = path_vfopen(mode, exit_on_error, path, ap);
va_end(ap);
return fd;
}
void
path_read_str(char *result, size_t len, const char *path, ...)
{
FILE *fd;
va_list ap;
va_start(ap, path);
fd = path_vfopen("r" UL_CLOEXECSTR, 1, path, ap);
va_end(ap);
if (!fgets(result, len, fd))
err(EXIT_FAILURE, _("cannot read %s"), pathbuf);
fclose(fd);
len = strlen(result);
if (result[len - 1] == '\n')
result[len - 1] = '\0';
}
uint64_t
path_read_u64(const char *path, ...)
{
FILE *fd;
va_list ap;
uint64_t result;
va_start(ap, path);
fd = path_vfopen("r", 1, path, ap);
va_end(ap);
if (fscanf(fd, "%"SCNu64, &result) != 1) {
if (ferror(fd))
err(EXIT_FAILURE, _("cannot read %s"), pathbuf);
else
errx(EXIT_FAILURE, _("parse error: %s"), pathbuf);
}
fclose(fd);
return result;
}
int
path_read_s32(const char *path, ...)
{
FILE *fd;
va_list ap;
int result;
va_start(ap, path);
fd = path_vfopen("r" UL_CLOEXECSTR, 1, path, ap);
va_end(ap);
if (fscanf(fd, "%d", &result) != 1) {
if (ferror(fd))
err(EXIT_FAILURE, _("cannot read %s"), pathbuf);
else
errx(EXIT_FAILURE, _("parse error: %s"), pathbuf);
}
fclose(fd);
return result;
}
int
path_getnum(const char *path, ...)
{
FILE *fd;
va_list ap;
int result;
va_start(ap, path);
fd = path_vfopen("r", 1, path, ap);
va_end(ap);
if (fscanf(fd, "%d", &result) != 1) {
if (ferror(fd))
err(EXIT_FAILURE, _("failed to read: %s"), pathbuf);
else
errx(EXIT_FAILURE, _("parse error: %s"), pathbuf);
}
fclose(fd);
return result;
}
