File:
[ELWIX - Embedded LightWeight unIX -] /
libaitio /
src /
exec.c
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Sat Feb 8 22:06:17 2014 UTC (10 years, 6 months ago) by
misho
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CVS tags:
io7_4,
io7_3,
io7_2,
io7_1,
io7_0,
IO7_3,
IO7_2,
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version 6.9
/*************************************************************************
* (C) 2013 AITNET ltd - Sofia/Bulgaria - <misho@aitnet.org>
* by Michael Pounov <misho@elwix.org>
*
* $Author: misho $
* $Id: exec.c,v 1.4 2014/02/08 22:06:17 misho Exp $
*
**************************************************************************
The ELWIX and AITNET software is distributed under the following
terms:
All of the documentation and software included in the ELWIX and AITNET
Releases is copyrighted by ELWIX - Sofia/Bulgaria <info@elwix.org>
Copyright 2004 - 2014
by Michael Pounov <misho@elwix.org>. All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
3. All advertising materials mentioning features or use of this software
must display the following acknowledgement:
This product includes software developed by Michael Pounov <misho@elwix.org>
ELWIX - Embedded LightWeight unIX and its contributors.
4. Neither the name of AITNET nor the names of its contributors
may be used to endorse or promote products derived from this software
without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY AITNET AND CONTRIBUTORS ``AS IS'' AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
SUCH DAMAGE.
*/
#include "global.h"
/*
* io_progInit() - Init program pool
*
* @progName = program name for execution
* @initNum = initial started programs
* @maxNum = maximum started programs
* return: NULL error or !=NULL allocated pool (must destroied with io_progDestroy())
*/
prog_t *
io_progInit(const char *progName, u_int initNum, u_int maxNum)
{
prog_t *prg = NULL;
if (initNum > maxNum)
return NULL;
prg = e_malloc(sizeof(prog_t));
if (!prg) {
io_SetErr(elwix_GetErrno(), "%s", elwix_GetError());
return NULL;
} else
memset(prg, 0, sizeof(prog_t));
prg->prog_inin = initNum;
prg->prog_maxn = maxNum;
strlcpy(prg->prog_name, progName, sizeof prg->prog_name);
prg->prog_used = e_malloc(E_ALIGN(prg->prog_maxn, sizeof *prg->prog_used) /
sizeof *prg->prog_used);
if (!prg->prog_used) {
io_SetErr(elwix_GetErrno(), "%s", elwix_GetError());
e_free(prg);
return NULL;
}
prg->prog_fds = array_Init(prg->prog_maxn);
if (!prg->prog_fds) {
io_SetErr(elwix_GetErrno(), "%s", elwix_GetError());
e_free(prg->prog_used);
e_free(prg);
return NULL;
}
pthread_mutex_init(&prg->prog_mtx, NULL);
signal(SIGPIPE, SIG_IGN);
if (io_progOpen(prg, prg->prog_inin) < 0) {
io_progDestroy(&prg);
prg = NULL;
}
return prg;
}
/*
* io_progDestroy() - Destroy entire program pool
*
* @pprg = program pool
* return: none
*/
void
io_progDestroy(prog_t ** __restrict pprg)
{
if (!pprg || !*pprg)
return;
io_progClose(*pprg, 0);
e_free((*pprg)->prog_used);
array_Destroy(&(*pprg)->prog_fds);
pthread_mutex_destroy(&(*pprg)->prog_mtx);
signal(SIGPIPE, SIG_DFL);
e_free(*pprg);
*pprg = NULL;
}
/*
* io_progClose() - Close all programs in pool
*
* @prg = program pool
* @closeNum = close program(s) (0 all)
* return: 0 error, >0 closed programs
*/
int
io_progClose(prog_t * __restrict prg, u_int closeNum)
{
register int i;
int ret = 0;
struct tagPIOPID *p;
if (!prg)
return 0;
if (closeNum > prg->prog_maxn) {
io_SetErr(EINVAL, "Requested number for close program is over pool's limit");
return 0;
}
pthread_mutex_lock(&prg->prog_mtx);
for (i = array_Size(prg->prog_fds) - 1;
(closeNum ? ret < closeNum : 42) && i > -1; i--)
if (array_Get(prg->prog_fds, i) &&
#ifdef POPEN_STREAM
(p = pio_pgetpid(array(prg->prog_fds, i, FILE*)))) {
#else
(p = pio_pgetpid((int) array(prg->prog_fds, i, intptr_t)))) {
#endif
kill(p->pid, SIGTERM);
usleep(1000);
if (waitpid(p->pid, &p->stat, WNOHANG) > 0)
kill(p->pid, SIGKILL);
#ifdef POPEN_STREAM
e_pclose(array(prg->prog_fds, i, FILE*));
#else
e_pclose((int) array(prg->prog_fds, i, intptr_t));
#endif
array_Del(prg->prog_fds, i, 0);
clrbit(prg->prog_used, i);
prg->prog_cnum--;
ret++;
}
pthread_mutex_unlock(&prg->prog_mtx);
return ret;
}
/*
* io_progCloseAt() - Close program at pool of certain position
*
* @prg = program pool
* @idx = index at pool
* return: 0 error or !=0 closed program
*/
int
io_progCloseAt(prog_t * __restrict prg, u_int idx)
{
int ret = 0;
struct tagPIOPID *p;
if (!prg)
return 0;
if (idx > prg->prog_maxn) {
io_SetErr(EINVAL, "Requested number for close program is over pool's limit");
return 0;
}
pthread_mutex_lock(&prg->prog_mtx);
if (array_Get(prg->prog_fds, idx) &&
#ifdef POPEN_STREAM
(p = pio_pgetpid(array(prg->prog_fds, idx, FILE*)))) {
#else
(p = pio_pgetpid((int) array(prg->prog_fds, idx, intptr_t)))) {
#endif
kill(p->pid, SIGTERM);
usleep(1000);
if (waitpid(p->pid, &p->stat, WNOHANG) > 0)
kill(p->pid, SIGKILL);
#ifdef POPEN_STREAM
e_pclose(array(prg->prog_fds, idx, FILE*));
#else
e_pclose((int) array(prg->prog_fds, idx, intptr_t));
#endif
array_Del(prg->prog_fds, idx, 0);
clrbit(prg->prog_used, idx);
prg->prog_cnum--;
ret++;
}
pthread_mutex_unlock(&prg->prog_mtx);
return ret;
}
/*
* io_progCloseOf() - Close program at pool with certain handle
*
* @prg = program pool
* @h = handle of program
* return: 0 error, >0 closed programs
*/
int
#ifdef POPEN_STREAM
io_progCloseOf(prog_t * __restrict prg, FILE *h)
#else
io_progCloseOf(prog_t * __restrict prg, int h)
#endif
{
register int i;
int ret = 0;
struct tagPIOPID *p;
#ifdef POPEN_STREAM
FILE *f;
#else
int f;
#endif
if (!prg)
return 0;
pthread_mutex_lock(&prg->prog_mtx);
for (i = 0; i < array_Size(prg->prog_fds); i++)
if (array_Get(prg->prog_fds, i)) {
#ifdef POPEN_STREAM
f = array(prg->prog_fds, i, FILE*);
if (f == h && (p = pio_pgetpid(array(prg->prog_fds, i, FILE*)))) {
#else
f = (int) array(prg->prog_fds, i, intptr_t);
if (f == h && (p = pio_pgetpid((int) array(prg->prog_fds, i, intptr_t)))) {
#endif
kill(p->pid, SIGTERM);
usleep(1000);
if (waitpid(p->pid, &p->stat, WNOHANG) > 0)
kill(p->pid, SIGKILL);
#ifdef POPEN_STREAM
e_pclose(array(prg->prog_fds, i, FILE*));
#else
e_pclose((int) array(prg->prog_fds, i, intptr_t));
#endif
array_Del(prg->prog_fds, i, 0);
clrbit(prg->prog_used, i);
prg->prog_cnum--;
ret++;
break;
}
}
pthread_mutex_unlock(&prg->prog_mtx);
return ret;
}
/*
* io_progOpen2() - Start program from pool on first unused slot
*
* @prg = program pool
* return: -1 error, >-1 reside at slot
*/
int
io_progOpen2(prog_t * __restrict prg)
{
#ifdef POPEN_STREAM
FILE *f = NULL;
#else
int f = -1;
#endif
int stat, ret = -1;
register int i;
pid_t pid;
if (!prg)
return -1;
if (prg->prog_cnum + 1 > prg->prog_maxn) {
io_SetErr(EINVAL, "Requested number for program execution is over pool's limit");
return -1;
}
pthread_mutex_lock(&prg->prog_mtx);
for (i = 0; i < array_Size(prg->prog_fds); i++)
if (!array_Get(prg->prog_fds, i)) {
f = e_popen(prg->prog_name, "r+", &pid);
#ifdef POPEN_STREAM
if (!f) {
#else
if (f == -1) {
#endif
LOGERR;
break;
} else if (waitpid(pid, &stat, WNOHANG)) {
io_SetErr(ECHILD, "Program with pid=%d exit with status %d",
pid, WIFEXITED(stat) ? WEXITSTATUS(stat) : -1);
e_pclose(f);
break;
} else
array_Set(prg->prog_fds, i, (intptr_t) f);
clrbit(prg->prog_used, i);
prg->prog_cnum++;
ret = i;
break;
}
pthread_mutex_unlock(&prg->prog_mtx);
return ret;
}
/*
* io_progOpen() - Execute number of program(s)
*
* @prg = program pool
* @execNum = execute program(s) (0 max)
* return: -1 error, >0 executed programs
*/
int
io_progOpen(prog_t * __restrict prg, u_int execNum)
{
#ifdef POPEN_STREAM
FILE *f;
#else
int f;
#endif
int stat, ret = 0;
register int i;
pid_t pid;
if (!prg)
return -1;
if (prg->prog_cnum + execNum > prg->prog_maxn) {
io_SetErr(EINVAL, "Requested number for program execution is over pool's limit");
return -1;
}
pthread_mutex_lock(&prg->prog_mtx);
for (i = 0; (execNum ? ret < execNum : 42) && i < array_Size(prg->prog_fds); i++)
if (!array_Get(prg->prog_fds, i)) {
f = e_popen(prg->prog_name, "r+", &pid);
#ifdef POPEN_STREAM
if (!f) {
#else
if (f == -1) {
#endif
LOGERR;
ret = -1;
break;
} else if (waitpid(pid, &stat, WNOHANG)) {
io_SetErr(ECHILD, "Program with pid=%d exit with status %d",
pid, WIFEXITED(stat) ? WEXITSTATUS(stat) : -1);
e_pclose(f);
ret = -1;
break;
} else
array_Set(prg->prog_fds, i, (intptr_t) f);
clrbit(prg->prog_used, i);
prg->prog_cnum++;
ret++;
}
pthread_mutex_unlock(&prg->prog_mtx);
return ret;
}
/*
* io_progGrow() - Execute to number of programs in pool
*
* @prg = program pool
* @toNum = execute to number of programs (0 max)
* return: 0 error or nothing to do,
* >0 executed programs and abs(<0) executed programs with logged error
*/
int
io_progGrow(prog_t * __restrict prg, u_int toNum)
{
if (!prg)
return 0;
if (toNum > prg->prog_maxn) {
io_SetErr(EINVAL, "Requested number for program execution is over pool's limit");
return 0;
}
if (!toNum)
toNum = prg->prog_maxn;
if (toNum < prg->prog_inin)
toNum = prg->prog_inin;
if ((int) (toNum - prg->prog_cnum) < 1)
return 0;
return io_progOpen(prg, toNum - prg->prog_cnum);
}
/*
* io_progVacuum() - Vacuum pool to running number of programs
*
* @prg = program pool
* @toNum = vacuum to number of programs (0 to init number)
* return: 0 error or >0 closed programs
*/
int
io_progVacuum(prog_t * __restrict prg, u_int toNum)
{
register int i;
int ret = 0;
struct tagPIOPID *p;
if (!prg)
return 0;
if (toNum > prg->prog_maxn) {
io_SetErr(EINVAL, "Requested number for close program is over pool's limit");
return 0;
}
if (!toNum)
toNum = prg->prog_inin;
pthread_mutex_lock(&prg->prog_mtx);
for (i = array_Size(prg->prog_fds) - 1; prg->prog_cnum > toNum && i > -1; i--)
if (array_Get(prg->prog_fds, i) && isclr(prg->prog_used, i) &&
#ifdef POPEN_STREAM
(p = pio_pgetpid(array(prg->prog_fds, i, FILE*)))) {
kill(p->pid, SIGTERM);
usleep(1000);
if (waitpid(p->pid, &p->stat, WNOHANG) > 0)
kill(p->pid, SIGKILL);
e_pclose(array(prg->prog_fds, i, FILE*));
#else
(p = pio_pgetpid((int) array(prg->prog_fds, i, intptr_t)))) {
kill(p->pid, SIGTERM);
usleep(1000);
if (waitpid(p->pid, &p->stat, WNOHANG) > 0)
kill(p->pid, SIGKILL);
e_pclose((int) array(prg->prog_fds, i, intptr_t));
#endif
array_Del(prg->prog_fds, i, 0);
prg->prog_cnum--;
ret++;
}
pthread_mutex_unlock(&prg->prog_mtx);
return ret;
}
/*
* io_progCheck() - Check exit status of program pool
*
* @prg = program pool
* @re = resurrect program to init number
* return: -1 error or >-1 exited programs
*/
int
io_progCheck(prog_t * __restrict prg, int re)
{
int ret = 0;
struct tagPIOPID *p;
register int i;
if (!prg)
return -1;
pthread_mutex_lock(&prg->prog_mtx);
for (i = 0; i < array_Size(prg->prog_fds); i++)
if (array_Get(prg->prog_fds, i) &&
#ifdef POPEN_STREAM
(p = pio_pgetpid(array(prg->prog_fds, i, FILE*)))) {
#else
(p = pio_pgetpid((int) array(prg->prog_fds, i, intptr_t)))) {
#endif
if (waitpid(p->pid, &p->stat, WNOHANG)) {
clrbit(prg->prog_used, i);
#ifdef POPEN_STREAM
e_pclose(array(prg->prog_fds, i, FILE*));
#else
e_pclose((int) array(prg->prog_fds, i, intptr_t));
#endif
array_Del(prg->prog_fds, i, 0);
prg->prog_cnum--;
ret++;
}
}
pthread_mutex_unlock(&prg->prog_mtx);
/* resurrect to init number */
if (re && ((int) (prg->prog_inin - prg->prog_cnum) > 0))
io_progOpen(prg, prg->prog_inin - prg->prog_cnum);
return ret;
}
/*
* io_progAttach() - Attach to open program
*
* @prg = program pool
* @newOne = Execute new one program after attach
* return: NULL error or !=NULL attached program handle
*/
#ifdef POPEN_STREAM
FILE *
#else
int
#endif
io_progAttach(prog_t * __restrict prg, int newOne)
{
#ifdef POPEN_STREAM
FILE *f = NULL;
#else
int f = -1;
#endif
register int i;
if (!prg)
#ifdef POPEN_STREAM
return NULL;
#else
return -1;
#endif
pthread_mutex_lock(&prg->prog_mtx);
for (i = 0; i < array_Size(prg->prog_fds); i++)
if (array_Get(prg->prog_fds, i) && isclr(prg->prog_used, i)) {
setbit(prg->prog_used, i);
#ifdef POPEN_STREAM
f = array(prg->prog_fds, i, FILE*);
#else
f = array(prg->prog_fds, i, intptr_t);
#endif
break;
}
pthread_mutex_unlock(&prg->prog_mtx);
/* execute new one program */
if (newOne) {
if (f)
io_progOpen(prg, 1);
else if ((i = io_progOpen2(prg)) > -1)
/* not found free program */
#ifdef POPEN_STREAM
f = array(prg->prog_fds, i, FILE*);
#else
f = array(prg->prog_fds, i, intptr_t);
#endif
}
return f;
}
/*
* io_progDetach() - Detch from open program
*
* @prg= program pool
* @pfd = attached program handle
* return: none
*/
void
#ifdef POPEN_STREAM
io_progDetach(prog_t * __restrict prg, FILE *pfd)
#else
io_progDetach(prog_t * __restrict prg, int pfd)
#endif
{
register int i;
if (!prg || !pfd)
return;
pthread_mutex_lock(&prg->prog_mtx);
for (i = 0; i < array_Size(prg->prog_fds); i++)
#ifdef POPEN_STREAM
if (array(prg->prog_fds, i, FILE*) == pfd) {
#else
if (array(prg->prog_fds, i, intptr_t) == pfd) {
#endif
clrbit(prg->prog_used, i);
break;
}
pthread_mutex_unlock(&prg->prog_mtx);
}
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