Code refactor; only s6-ps has remaining globals now

Signed-off-by: Laurent Bercot <ska@appnovation.com>

1 files changed, 561 insertions, 0 deletions

diff --git a/src/libps/s6ps_pfield.c b/src/libps/s6ps_pfield.c
new file mode 100644
index 0000000..9e53e50
--- /dev/null
+++ b/src/libps/s6ps_pfield.c
@@ -0,0 +1,561 @@
+/* ISC license. */
+
+#include <string.h>
+#include <stdint.h>
+#include <unistd.h>
+#include <time.h>
+#include <sys/sysinfo.h>
+
+#include <skalibs/uint64.h>
+#include <skalibs/types.h>
+#include <skalibs/strerr.h>
+#include <skalibs/tai.h>
+#include <skalibs/djbtime.h>
+#include <skalibs/stralloc.h>
+
+#include "s6-ps.h"
+
+static char const *const fieldheaders[PFIELD_PHAIL] =
+{
+  "PID",
+  "COMM",
+  "STAT",
+  "PPID",
+  "PGRP",
+  "SESSION",
+  "TTY",
+  "TPGID",
+  "UTIME",
+  "STIME",
+  "CUTIME",
+  "CSTIME",
+  "PRIO",
+  "NICE",
+  "THREADS",
+  "START",
+  "VSZ",
+  "RSS",
+  "RSSLIM",
+  "CPU",
+  "RTPRIO",
+  "RTPOLICY",
+  "USER",
+  "GROUP",
+  "%MEM",
+  "WCHAN",
+  "COMMAND",
+  "ENVIRONMENT",
+  "%CPU",
+  "TTIME",
+  "CTTIME",
+  "TSTART",
+  "C%CPU"
+} ;
+
+char const *const *s6ps_fieldheaders = fieldheaders ;
+
+static char const *const opttable[PFIELD_PHAIL] =
+{
+  "pid",
+  "comm",
+  "s",
+  "ppid",
+  "pgrp",
+  "sess",
+  "tty",
+  "tpgid",
+  "utime",
+  "stime",
+  "cutime",
+  "cstime",
+  "prio",
+  "nice",
+  "thcount",
+  "start",
+  "vsize",
+  "rss",
+  "rsslimit",
+  "psr",
+  "rtprio",
+  "policy",
+  "user",
+  "group",
+  "pmem",
+  "wchan",
+  "args",
+  "env",
+  "pcpu",
+  "ttime",
+  "cttime",
+  "tstart",
+  "cpcpu"
+} ;
+
+char const *const *s6ps_opttable = opttable ;
+
+static tain boottime = TAIN_EPOCH ;
+
+static int fmt_64 (pscan_t *p, size_t *pos, size_t *len, uint64_t u)
+{                                                          
+  if (!stralloc_readyplus(&p->data, UINT64_FMT)) return 0 ;
+  *pos = p->data.len ;
+  *len = uint64_fmt(p->data.s + *pos, u) ;
+  p->data.len += *len ;
+  return 1 ;
+}                                                          
+
+static int fmt_i (pscan_t *p, size_t *pos, size_t *len, int d)
+{
+  if (!stralloc_readyplus(&p->data, UINT32_FMT+1)) return 0 ;
+  *pos = p->data.len ;
+  *len = int_fmt(p->data.s + *pos, d) ;
+  p->data.len += *len ;
+  return 1 ;
+}
+
+static int fmt_pid (pscan_t *p, size_t *pos, size_t *len)
+{
+  return fmt_64(p, pos, len, p->pid) ;
+}
+
+static int fmt_comm (pscan_t *p, size_t *pos, size_t *len)
+{
+  *pos = p->statlen ;
+  *len = p->commlen ;
+  return 1 ;
+}
+
+static int fmt_s (pscan_t *p, size_t *pos, size_t *len)
+{
+  if (!stralloc_readyplus(&p->data, 4)) return 0 ;
+  *pos = p->data.len ;
+  p->data.s[p->data.len++] = p->data.s[p->state] ;
+  if (p->pid == p->session) p->data.s[p->data.len++] = 's' ;
+  if (p->threads > 1) p->data.s[p->data.len++] = 'l' ;
+  if ((p->tpgid > 0) && ((unsigned int)p->tpgid == p->pgrp))
+    p->data.s[p->data.len++] = '+' ;
+  if (p->nice) p->data.s[p->data.len++] = (p->nice < 0) ? '<' : 'N' ;
+  
+  *len = p->data.len - *pos ;
+  return 1 ;
+}
+
+static int fmt_ppid (pscan_t *p, size_t *pos, size_t *len)
+{
+  return fmt_64(p, pos, len, p->ppid) ;
+}
+
+static int fmt_pgrp (pscan_t *p, size_t *pos, size_t *len)
+{
+  return fmt_64(p, pos, len, p->pgrp) ;
+}
+
+static int fmt_session (pscan_t *p, size_t *pos, size_t *len)
+{
+  return fmt_64(p, pos, len, p->session) ;
+}
+
+static int fmt_ttynr(pscan_t *p, size_t *pos, size_t *len)
+{
+  if (p->ttynr)
+  {
+    size_t tmppos = p->data.len ;
+    if (!s6ps_ttycache_lookup(&p->data, p->ttynr)) return 0 ;
+    *pos = tmppos ;
+    *len = p->data.len - tmppos ;
+  }
+  else
+  {
+    if (!stralloc_catb(&p->data, "-", 1)) return 0 ;
+    *pos = p->data.len - 1 ;
+    *len = 1 ;
+  }
+  return 1 ;
+}
+
+static int fmt_tpgid (pscan_t *p, size_t *pos, size_t *len)
+{
+  return p->tpgid < 0 ? fmt_i(p, pos, len, -1) : fmt_64(p, pos, len, p->tpgid) ;
+}
+
+static unsigned int gethz (void)
+{
+  static unsigned int hz = 0 ;
+  if (!hz)
+  {            
+    long jiffies = sysconf(_SC_CLK_TCK) ;
+    if (jiffies < 1)
+    {             
+      char fmt[ULONG_FMT + 1] ;
+      fmt[long_fmt(fmt, jiffies)] = 0 ;
+      strerr_warnw3x("invalid _SC_CLK_TCK value (", fmt, "), using 100") ;
+      hz = 100 ;
+    }         
+    else hz = (unsigned int)jiffies ;
+  }
+  return hz ;
+}                
+
+int s6ps_compute_boottime (pscan_t *p, unsigned int mypos)
+{
+  if (!mypos--)
+  {
+    strerr_warnwu1x("compute boot time - using epoch") ;
+    return 0 ;
+  }
+  else
+  {
+    unsigned int hz = gethz() ;
+    tain offset = { .sec = { .x = p[mypos].start / hz }, .nano = (p[mypos].start % hz) * (1000000000 / hz) } ;
+    tain_sub(&boottime, &STAMP, &offset) ;
+    return 1 ;
+  }
+}
+
+static int fmt_jiffies (pscan_t *p, size_t *pos, size_t *len, uint64_t j)
+{
+  unsigned int hz = gethz() ;
+  uint32_t hrs, mins, secs, hfrac ;
+  if (!stralloc_readyplus(&p->data, UINT64_FMT + 13)) return 0 ;
+  hfrac = (j % hz) * 100 / hz ;
+  *pos = p->data.len ;
+  j /= hz ;
+  secs = j % 60 ; j /= 60 ;
+  mins = j % 60 ; j /= 60 ;
+  hrs = j % 24 ; j /= 24 ;
+  if (j)
+  {
+    p->data.len += uint64_fmt(p->data.s + p->data.len, j) ;
+    p->data.s[p->data.len++] = 'd' ;
+  }
+  if (j || hrs)
+  {
+    uint320_fmt(p->data.s + p->data.len, hrs, 2) ;
+    p->data.len += 2 ;
+    p->data.s[p->data.len++] = 'h' ;
+  }
+  if (j || hrs || mins)
+  {
+    uint320_fmt(p->data.s + p->data.len, mins, 2) ;
+    p->data.len += 2 ;
+    p->data.s[p->data.len++] = 'm' ;
+  }
+  uint320_fmt(p->data.s + p->data.len, secs, 2) ;
+  p->data.len += 2 ;
+  if (!j && !hrs && !mins)
+  {
+    p->data.s[p->data.len++] = '.' ;
+    uint320_fmt(p->data.s + p->data.len, hfrac, 2) ;
+    p->data.len += 2 ;
+  }
+  p->data.s[p->data.len++] = 's' ;
+  *len = p->data.len - *pos ;
+  return 1 ;
+}
+
+static int fmt_utime (pscan_t *p, size_t *pos, size_t *len)
+{
+  return fmt_jiffies(p, pos, len, p->utime) ;
+}
+
+static int fmt_stime (pscan_t *p, size_t *pos, size_t *len)
+{
+  return fmt_jiffies(p, pos, len, p->stime) ;
+}
+
+static int fmt_cutime (pscan_t *p, size_t *pos, size_t *len)
+{
+  return fmt_jiffies(p, pos, len, p->utime + p->cutime) ;
+}
+
+static int fmt_cstime (pscan_t *p, size_t *pos, size_t *len)
+{
+  return fmt_jiffies(p, pos, len, p->stime + p->cstime) ;
+}
+
+static int fmt_prio (pscan_t *p, size_t *pos, size_t *len)
+{
+  return fmt_i(p, pos, len, p->prio) ;
+}
+
+static int fmt_nice (pscan_t *p, size_t *pos, size_t *len)
+{
+  return fmt_i(p, pos, len, p->nice) ;
+}
+
+static int fmt_threads (pscan_t *p, size_t *pos, size_t *len)
+{
+  return fmt_64(p, pos, len, p->threads) ;
+}
+
+static int fmt_timedate (pscan_t *p, size_t *pos, size_t *len, struct tm const *tm)
+{
+  static struct tm nowtm = { .tm_year = 0 } ;
+  size_t tmplen ;
+  char *tmpstrf = "%F" ;
+  if (!nowtm.tm_year && !localtm_from_tai(&nowtm, tain_secp(&STAMP), 1)) return 0 ;
+  if (!stralloc_readyplus(&p->data, 20)) return 0 ;
+  if (tm->tm_year == nowtm.tm_year && tm->tm_yday == nowtm.tm_yday)
+    tmpstrf = "%T" ;
+  else if (tm->tm_year == nowtm.tm_year || (tm->tm_year+1 == nowtm.tm_year && (nowtm.tm_mon + 12 - tm->tm_mon) % 12 < 9))
+    tmpstrf = "%b%d %R" ;
+  tmplen = strftime(p->data.s + p->data.len, 20, tmpstrf, tm) ;
+  if (!tmplen) return 0 ;
+  *len = tmplen ;
+  *pos = p->data.len ;
+  p->data.len += tmplen ;
+  return 1 ;
+}
+
+static int fmt_start (pscan_t *p, size_t *pos, size_t *len)
+{
+  struct tm starttm ;
+  unsigned int hz = gethz() ;
+  tain blah = { .sec = { .x = p->start / hz }, .nano = (p->start % hz) * (1000000000 / hz) } ;
+  tain_add(&blah, &boottime, &blah) ;
+  if (!localtm_from_tai(&starttm, tain_secp(&blah), 1)) return 0 ;
+  return fmt_timedate(p, pos, len, &starttm) ;
+}
+
+static unsigned int getpgsz (void)
+{
+  static unsigned int pgsz = 0 ;
+  if (!pgsz)
+  {
+    long sz = sysconf(_SC_PAGESIZE) ;
+    if (sz < 1)
+    {
+      char fmt[ULONG_FMT + 1] ;
+      fmt[long_fmt(fmt, sz)] = 0 ;
+      strerr_warnw3x("invalid _SC_PAGESIZE value (", fmt, "), using 4096") ;
+      pgsz = 4096 ;
+    }
+    else pgsz = sz ;
+  }
+  return pgsz ;
+}
+
+static int fmt_vsize (pscan_t *p, size_t *pos, size_t *len)
+{
+  return fmt_64(p, pos, len, p->vsize / 1024) ;
+}
+
+static int fmt_rss (pscan_t *p, size_t *pos, size_t *len)
+{
+  return fmt_64(p, pos, len, p->rss * (getpgsz() / 1024)) ;
+}
+
+static int fmt_rsslim (pscan_t *p, size_t *pos, size_t *len)
+{
+  return fmt_64(p, pos, len, p->rsslim / 1024) ;
+}
+
+static int fmt_cpuno (pscan_t *p, size_t *pos, size_t *len)
+{
+  return fmt_64(p, pos, len, p->cpuno) ;
+}
+
+static int fmt_rtprio (pscan_t *p, size_t *pos, size_t *len)
+{
+  return fmt_64(p, pos, len, p->rtprio) ;
+}
+
+static int fmt_policy (pscan_t *p, size_t *pos, size_t *len)
+{
+  static char const *const policies[8] = { "NORMAL", "FIFO", "RR", "BATCH", "ISO", "IDLE", "UNKNOWN", "UNKNOWN" } ;
+  size_t tmppos = p->data.len ;
+  if (!stralloc_cats(&p->data, policies[p->policy & 7])) return 0 ;
+  *pos = tmppos ;
+  *len = p->data.len - tmppos ;
+  return 1 ;
+}
+
+static int fmt_user (pscan_t *p, size_t *pos, size_t *len)
+{
+  size_t tmppos = p->data.len ;
+  if (!s6ps_pwcache_lookup(&p->data, p->uid)) return 0 ;
+  *pos = tmppos ;
+  *len = p->data.len - tmppos ;
+  return 1 ;
+}
+
+static int fmt_group (pscan_t *p, size_t *pos, size_t *len)
+{
+  size_t tmppos = p->data.len ;
+  if (!s6ps_grcache_lookup(&p->data, p->gid)) return 0 ;
+  *pos = tmppos ;
+  *len = p->data.len - tmppos ;
+  return 1 ;
+}
+
+static struct sysinfo si = { .totalram = 0, .loads = { 0, 0, 0 } } ;
+
+static uint64_t gettotalmem (void)
+{
+  uint64_t totalmem = 0 ;
+  if (!si.totalram && (sysinfo(&si) < 0)) return 0 ;
+  totalmem = si.totalram ;
+  totalmem *= si.mem_unit ;
+  return totalmem ;
+}
+
+static int percent (stralloc *sa, unsigned int n, size_t *pos, size_t *len)
+{
+  if (!stralloc_readyplus(sa, UINT64_FMT+1)) return 0 ;
+  *pos = sa->len ;
+  sa->len += uint_fmt(sa->s + sa->len, n / 100) ;
+  sa->s[sa->len++] = '.' ;
+  uint0_fmt(sa->s + sa->len, n % 100, 2) ;
+  sa->len += 2 ;
+  *len = sa->len - *pos ;
+  return 1 ;
+}
+
+static int fmt_pmem (pscan_t *p, size_t *pos, size_t *len)
+{
+  uint64 l = gettotalmem() ;
+  return l ? percent(&p->data, p->rss * getpgsz() * 10000 / l, pos, len) : 0 ;
+}
+
+static int fmt_wchan (pscan_t *p, size_t *pos, size_t *len)
+{
+  size_t tmppos = p->data.len ;
+  if (!s6ps_wchan_lookup(&p->data, p->wchan)) return 0 ;
+  *len = p->data.len - tmppos ;
+  *pos = tmppos ;
+  return 1 ;
+}
+
+static int fmt_args (pscan_t *p, size_t *pos, size_t *len)
+{
+  if (!stralloc_readyplus(&p->data, (p->height << 2) + (p->cmdlen ? p->cmdlen : p->commlen + (p->data.s[p->state] == 'Z' ? 11 : 3))))
+    return 0 ;
+  *pos = p->data.len ;
+  if (p->height)
+  {
+    unsigned int i = 0 ;
+    for (; i < 4 * (unsigned int)p->height - 3 ; i++)
+      p->data.s[p->data.len + i] = ' ' ;
+    memcpy(p->data.s + p->data.len + 4 * p->height - 3, "\\_ ", 3) ;
+    p->data.len += p->height << 2 ;
+  }
+  if (p->cmdlen)
+  {
+    char const *r = p->data.s + p->statlen + p->commlen ;
+    char *w = p->data.s + p->data.len ;
+    size_t i = p->cmdlen ;
+    while (i--)
+    {
+      char c = *r++ ;
+      *w++ = c ? c : ' ' ;
+    }
+    p->data.len += p->cmdlen ;
+  }
+  else if (p->data.s[p->state] == 'Z')
+  {
+    stralloc_catb(&p->data, p->data.s + uint32_fmt(0, p->pid) + 2, p->commlen) ;
+    stralloc_catb(&p->data, " <defunct>", 10) ;
+  }
+  else
+    stralloc_catb(&p->data, p->data.s + uint32_fmt(0, p->pid) + 1, p->commlen+2) ;
+  *len = p->data.len - *pos ;
+  return 1 ;
+}
+
+static int fmt_env (pscan_t *p, size_t *pos, size_t *len)
+{
+  size_t i = 0 ;
+  if (!p->envlen)
+  {
+    if (!stralloc_catb(&p->data, "*", 1)) return 0 ;
+    *pos = p->data.len - 1 ;
+    *len = 1 ;
+    return 1 ;
+  }
+  *pos = p->statlen + p->commlen + p->cmdlen ;
+  *len = p->envlen ;
+  for (; i < *len ; i++)
+    if (!p->data.s[*pos + i]) p->data.s[*pos + i] = ' ' ;
+  return 1 ;
+}
+
+static uint64_t gettotalj (uint64_t j)
+{
+  tain totaltime ;
+  unsigned int hz = gethz() ;
+  tain_sub(&totaltime, &STAMP, &boottime) ;
+  j = totaltime.sec.x * hz + totaltime.nano / (1000000000 / hz) - j ;
+  if (!j) j = 1 ;
+  return j ;
+}
+
+static int fmt_pcpu (pscan_t *p, size_t *pos, size_t *len)
+{
+  return percent(&p->data, 10000 * (p->utime + p->stime) / gettotalj(p->start), pos, len) ;
+}
+
+static int fmt_ttime (pscan_t *p, size_t *pos, size_t *len) 
+{
+  return fmt_jiffies(p, pos, len, p->utime + p->stime) ;
+}
+
+static int fmt_cttime (pscan_t *p, size_t *pos, size_t *len)
+{
+  return fmt_jiffies(p, pos, len, p->utime + p->stime + p->cutime + p->cstime) ;
+}
+
+static int fmt_tstart (pscan_t *p, size_t *pos, size_t *len)
+{
+  unsigned int hz = gethz() ;
+  tain blah = { .sec = { .x = p->start / hz }, .nano = (p->start % hz) * (1000000000 / hz) } ;
+  if (!stralloc_readyplus(&p->data, TIMESTAMP)) return 0 ;
+  tain_add(&blah, &boottime, &blah) ;
+  *pos = p->data.len ;
+  *len = timestamp_fmt(p->data.s + p->data.len, &blah) ;
+  p->data.len += *len ;
+  return 1 ;
+}
+
+static int fmt_cpcpu (pscan_t *p, size_t *pos, size_t *len)
+{
+  return percent(&p->data, 10000 * (p->utime + p->stime + p->cutime + p->cstime) / gettotalj(p->start), pos, len) ;
+}
+
+static pfieldfmt_func_ref pfieldfmt_table[PFIELD_PHAIL] =
+{
+  &fmt_pid,
+  &fmt_comm,
+  &fmt_s,
+  &fmt_ppid,
+  &fmt_pgrp,
+  &fmt_session,
+  &fmt_ttynr,
+  &fmt_tpgid,
+  &fmt_utime,
+  &fmt_stime,
+  &fmt_cutime,
+  &fmt_cstime,
+  &fmt_prio,
+  &fmt_nice,
+  &fmt_threads,
+  &fmt_start,
+  &fmt_vsize,
+  &fmt_rss,
+  &fmt_rsslim,
+  &fmt_cpuno,
+  &fmt_rtprio,
+  &fmt_policy,
+  &fmt_user,
+  &fmt_group,
+  &fmt_pmem,
+  &fmt_wchan,
+  &fmt_args,
+  &fmt_env,
+  &fmt_pcpu,
+  &fmt_ttime,
+  &fmt_cttime,
+  &fmt_tstart,
+  &fmt_cpcpu
+} ;
+
+pfieldfmt_func_ref *s6ps_pfield_fmt = pfieldfmt_table ;