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/* ISC license. */
#include <sys/types.h>
#include <errno.h>
#include <skalibs/uint32.h>
#include <skalibs/uint64.h>
#include <skalibs/fmtscan.h>
#include <skalibs/stralloc.h>
#include <skalibs/tai.h>
#include "s6-ps.h"
/*
going to great lengths to avoid scanf(), but all this code
is still smaller than scanf (no floating point parsing etc.)
*/
#define STATVARS 41
typedef size_t scanfunc_t (char const *, void *) ;
typedef scanfunc_t *scanfunc_t_ref ;
static size_t f32 (char const *s, void *u32)
{
uint32 *u = u32 ;
return uint32_scan(s, u) ;
}
static size_t f64 (char const *s, void *u64)
{
uint64 *u = u64 ;
return uint64_scan(s, u) ;
}
static size_t fint (char const *s, void *i)
{
int *d = i ;
return int_scan(s, d) ;
}
static size_t fpid (char const *s, void *p)
{
uint64 u ;
register size_t l = uint64_scan(s, &u) ;
*(pid_t *)p = u ;
return l ;
}
static size_t fdev (char const *s, void *p)
{
uint64 u ;
register size_t l = uint64_scan(s, &u) ;
*(dev_t *)p = u ;
return l ;
}
static scanfunc_t_ref scanfuncs[STATVARS] =
{
&fpid, /* ppid */
&fpid, /* pgrp */
&fpid, /* session */
&fdev, /* tty_nr */
&fpid, /* tpgid */
&f32, /* flags */
&f32, /* minflt */
&f32, /* cminflt */
&f32, /* majflt */
&f32, /* cmajflt */
&f64, /* utime */
&f64, /* stime */
&f64, /* cutime */
&f64, /* cstime */
&fint, /* priority */
&fint, /* nice */
&f32, /* num_threads */
&f32, /* itrealvalue */
&f64, /* starttime */
&f64, /* vsize */
&f64, /* rss */
&f64, /* rsslim */
&f64, /* startcode */
&f64, /* endcode */
&f64, /* startstack */
&f64, /* kstkesp */
&f64, /* kstkeip */
&f32, /* signal */
&f32, /* blocked */
&f32, /* sigignore */
&f32, /* sigcatch */
&f64, /* wchan */
&f32, /* nswap */
&f32, /* cnswap */
&f32, /* exit_signal */
&f32, /* processor */
&f32, /* rt_priority */
&f32, /* policy */
&f64, /* delayacct_blkio_ticks */
&f32, /* guest_time */
&f32 /* cguest_time */
} ;
int s6ps_statparse (pscan_t *p)
{
uint64 dummy64 ;
uint32 dummy32 ;
size_t pos = 0 ;
void *scanresults[STATVARS] =
{
&p->ppid,
&p->pgrp,
&p->session,
&p->ttynr,
&p->tpgid,
&dummy32,
&dummy32,
&dummy32,
&dummy32,
&dummy32,
&p->utime,
&p->stime,
&p->cutime,
&p->cstime,
&p->prio,
&p->nice,
&p->threads,
&dummy32,
&p->start,
&p->vsize,
&p->rss,
&p->rsslim,
&dummy64,
&dummy64,
&dummy64,
&dummy64,
&dummy64,
&dummy32,
&dummy32,
&dummy32,
&dummy32,
&p->wchan,
&dummy32,
&dummy32,
&dummy32,
&p->cpuno,
&p->rtprio,
&p->policy,
&dummy64,
&dummy32,
&dummy32
} ;
register unsigned int i = 0 ;
if (!p->statlen) return 0 ;
pos = uint32_scan(p->data.s, &dummy32) ;
if (!pos) return 0 ;
if (dummy32 != p->pid) return 0 ;
if (pos + 5 + p->commlen > p->statlen) return 0 ;
if (p->data.s[pos++] != ' ') return 0 ;
if (p->data.s[pos++] != '(') return 0 ;
pos += p->commlen ;
if (p->data.s[pos++] != ')') return 0 ;
if (p->data.s[pos++] != ' ') return 0 ;
p->state = pos++ ;
for (; i < STATVARS ; i++)
{
size_t w ;
if (pos + 1 > p->statlen) return 0 ;
if (p->data.s[pos++] != ' ') return 0 ;
w = (*scanfuncs[i])(p->data.s + pos, scanresults[i]) ;
if (!w) return 0 ;
pos += w ;
}
return 1 ;
}
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