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Fix 'ps' WAIT status display bug on setproctitle() platforms, cleared by

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Tom Lane.
This commit is contained in:
Bruce Momjian 2001-03-20 22:31:54 +00:00
parent 2bea1e0aec
commit 85c0c73267
1 changed files with 30 additions and 26 deletions
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56
src/backend/utils/misc/ps_status.c
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@ -5,7 +5,7 @@
* to contain some useful information. Differs wildly across
* platforms.
*
* $Header: /cvsroot/pgsql/src/backend/utils/misc/ps_status.c,v 1.2 2000/07/09 13:14:11 petere Exp $
* $Header: /cvsroot/pgsql/src/backend/utils/misc/ps_status.c,v 1.3 2001/03/20 22:31:54 momjian Exp $
*
* Copyright 2000 by PostgreSQL Global Development Group
* various details abducted from various places
@ -44,7 +44,7 @@ extern char **environ;
* PS_USE_PS_STRINGS
* assign PS_STRINGS->ps_argvstr = "string"
* (some BSD systems)
* PS_USE_CHANCE_ARGV
* PS_USE_CHANGE_ARGV
* assign argv[0] = "string"
* (some other BSD systems)
* PS_USE_CLOBBER_ARGV
@ -189,64 +189,68 @@ init_ps_display(int argc, char *argv[],
void
set_ps_display(const char * value)
{
#ifndef PS_USE_NONE
/* no ps display for stand-alone backend */
if (!IsUnderPostmaster)
return;
#ifndef PS_USE_NONE
# ifdef PS_USE_CLOBBER_ARGV
/* If ps_buffer is a pointer, it might still be null */
if (!ps_buffer)
return;
# endif
/* Update ps_buffer to contain both fixed part and value */
StrNCpy(ps_buffer + ps_buffer_fixed_size, value,
ps_buffer_size - ps_buffer_fixed_size);
/* Transmit new setting to kernel, if necessary */
# ifdef PS_USE_SETPROCTITLE
setproctitle("%s%s", ps_buffer, value);
setproctitle("%s", ps_buffer);
# endif
# else /* not PS_USE_SETPROCTITLE */
{
size_t vallen = strlen(value);
strncpy(ps_buffer + ps_buffer_fixed_size, value,
ps_buffer_size - ps_buffer_fixed_size);
if (ps_buffer_fixed_size + vallen >= ps_buffer_size)
ps_buffer[ps_buffer_size - 1] = 0;
else
ps_buffer[ps_buffer_fixed_size + vallen] = 0;
# ifdef PS_USE_PSTAT
# ifdef PS_USE_PSTAT
{
union pstun pst;
pst.pst_command = ps_buffer;
pstat(PSTAT_SETCMD, pst, strlen(ps_buffer), 0, 0);
}
# endif /* PS_USE_PSTAT */
# endif /* PS_USE_PSTAT */
# ifdef PS_USE_PS_STRINGS
# ifdef PS_USE_PS_STRINGS
PS_STRINGS->ps_nargvstr = 1;
PS_STRINGS->ps_argvstr = ps_buffer;
# endif /* PS_USE_PS_STRINGS */
# endif /* PS_USE_PS_STRINGS */
# ifdef PS_USE_CLOBBER_ARGV
# ifdef PS_USE_CLOBBER_ARGV
{
char * cp;
/* pad unused memory */
for(cp = ps_buffer + ps_buffer_fixed_size + vallen;
for(cp = ps_buffer + strlen(ps_buffer);
cp < ps_buffer + ps_buffer_size;
cp++)
*cp = PS_PADDING;
}
# endif /* PS_USE_CLOBBER_ARGV */
}
# endif /* not USE_SETPROCTITLE */
# endif /* PS_USE_CLOBBER_ARGV */
#endif /* not PS_USE_NONE */
}
/*
* Returns what's currently in the ps display, in case someone needs
* it.
* it. Note that only the variable part is returned.
*/
const char *
get_ps_display(void)
{
#ifdef PS_USE_CLOBBER_ARGV
/* If ps_buffer is a pointer, it might still be null */
if (!ps_buffer)
return "";
#endif
return ps_buffer + ps_buffer_fixed_size;
}