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Diff for /libelwix/src/pio.c between versions 1.1.2.1 and 1.10

version 1.1.2.1, 2013/12/05 14:56:42 version 1.10, 2024/10/28 09:58:51
Line 1 Line 1
   /*************************************************************************
   * (C) 2013 AITNET ltd - Sofia/Bulgaria - <misho@aitnet.org>
   *  by Michael Pounov <misho@elwix.org>
   *
   * $Author$
   * $Id$
   *
   **************************************************************************
   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 - 2024
           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"  #include "global.h"
   
   
   #ifdef __linux__
   #define __USE_GNU
   
   #ifndef O_CLOEXEC
   #define O_CLOEXEC       02000000
   #endif
   #endif
   
 extern char **environ;  extern char **environ;
   
pio_pid_t pio_pidlist = = SLIST_HEAD_INITIALIZER(pio_pidlist);pio_pid_t pio_pidlist = SLIST_HEAD_INITIALIZER(pio_pidlist);
 #ifdef HAVE_LIBPTHREAD
 static pthread_mutex_t pidlist_mutex = PTHREAD_MUTEX_INITIALIZER;  static pthread_mutex_t pidlist_mutex = PTHREAD_MUTEX_INITIALIZER;
   
#define THREAD_LOCK()   if (__isthreaded) pthread_mutex_lock(&pidlist_mutex)#define THREAD_LOCK()   pthread_mutex_lock(&pidlist_mutex)
#define THREAD_UNLOCK() if (__isthreaded) pthread_mutex_unlock(&pidlist_mutex)#define THREAD_UNLOCK() pthread_mutex_unlock(&pidlist_mutex)
 #else
 #define THREAD_LOCK()
 #define THREAD_UNLOCK()
 #endif
   
   
 /*  /*
  * e_popen() - ELWIX replacement of standard popen   * e_popen() - ELWIX replacement of standard popen
  *   *
  * @command = command   * @command = command
  * @type = type   * @type = type
  * @ppid = return pid of child program   * @ppid = return pid of child program
    *      If value of *ppid is -1 when invoke routine then child will be session leader
  * return: NULL error or !=NULL open program   * return: NULL error or !=NULL open program
  */   */
   #ifdef POPEN_STREAM
 FILE *  FILE *
   #else
   int
   #endif
 e_popen(const char *command, const char *type, pid_t *ppid)  e_popen(const char *command, const char *type, pid_t *ppid)
 {  {
        struct tagPIOPID *cur;        return e_popen2(command, type, ppid, NULL, 0);
        FILE *iop;}
        int pdes[2], pid, twoway, cloexec;
 /*
  * e_popen2() - ELWIX replacement of standard popen with post close of chosen handles
  *
  * @command = command
  * @type = type
  * @ppid = return pid of child program 
  *      If value of *ppid is -1 when invoke routine then child will be session leader
  * @fds = file descriptor array for close when fork
  * @fdslen = fds number of descriptors
  * return: NULL error or !=NULL open program
  */
 #ifdef POPEN_STREAM
 FILE *
 #else
 int
 #endif
 e_popen2(const char *command, const char *type, pid_t *ppid, int *fds, size_t fdslen)
 {
         struct tagPIOPID *cur, *p;
         int pdes[2], pid, twoway, cloexec, i;
         char *argv[4];          char *argv[4];
         struct pid *p;  
   
           if (!command || !type)
   #ifdef POPEN_STREAM
                   return NULL;
   #else
                   return -1;
   #endif
   
         cloexec = strchr(type, 'e') != NULL;          cloexec = strchr(type, 'e') != NULL;
         /*          /*
          * Lite2 introduced two-way popen() pipes using _socketpair().           * Lite2 introduced two-way popen() pipes using _socketpair().
Line 35  e_popen(const char *command, const char *type, pid_t * Line 123  e_popen(const char *command, const char *type, pid_t *
         if (strchr(type, '+')) {          if (strchr(type, '+')) {
                 twoway = 1;                  twoway = 1;
                 type = "r+";                  type = "r+";
        } else  {        } else {
                 twoway = 0;                  twoway = 0;
                if ((*type != 'r' && *type != 'w') ||                if ((*type != 'r' && *type != 'w') || 
                    (type[1] && (type[1] != 'e' || type[2])))                                (type[1] && (type[1] != 'e' || type[2])))
                        return (NULL);#ifdef POPEN_STREAM
                         return NULL;
 #else
                         return -1;
 #endif
         }          }
        if ((cloexec ? pipe2(pdes, O_CLOEXEC) : pipe(pdes)) < 0)        if (socketpair(AF_UNIX, SOCK_STREAM | (cloexec ? O_CLOEXEC : 0), 
                return (NULL);                                0, pdes) < 0) {
                 LOGERR;
 #ifdef POPEN_STREAM
                 return NULL;
 #else
                 return -1;
 #endif
         }
   
        if ((cur = e_malloc(sizeof(struct pid))) == NULL) {        if (!(cur = e_malloc(sizeof(struct tagPIOPID)))) {
                 close(pdes[0]);                  close(pdes[0]);
                 close(pdes[1]);                  close(pdes[1]);
                return (NULL);#ifdef POPEN_STREAM
                 return NULL;
 #else
                 return -1;
 #endif
         }          }
   
         argv[0] = "sh";          argv[0] = "sh";
         argv[1] = "-c";          argv[1] = "-c";
        argv[2] = (char *)command;        argv[2] = (char *) command;
         argv[3] = NULL;          argv[3] = NULL;
   
         THREAD_LOCK();          THREAD_LOCK();
        switch (pid = vfork()) {        switch (pid = fork()) {
         case -1:                        /* Error. */          case -1:                        /* Error. */
                   LOGERR;
                 THREAD_UNLOCK();                  THREAD_UNLOCK();
                 close(pdes[0]);                  close(pdes[0]);
                 close(pdes[1]);                  close(pdes[1]);
                 e_free(cur);                  e_free(cur);
                return (NULL);#ifdef POPEN_STREAM
                 return NULL;
 #else
                 return -1;
 #endif
                 /* NOTREACHED */                  /* NOTREACHED */
         case 0:                         /* Child. */          case 0:                         /* Child. */
                   if (ppid && *ppid == -1)
                           setsid();
   
                   if (fds && fdslen) {
                           for (i = 0; i < fdslen; i++)
                                   close(fds[i]);
                   }
   
                 if (*type == 'r') {                  if (*type == 'r') {
                         /*                          /*
                          * The _dup2() to STDIN_FILENO is repeated to avoid                           * The _dup2() to STDIN_FILENO is repeated to avoid
Line 99  e_popen(const char *command, const char *type, pid_t * Line 215  e_popen(const char *command, const char *type, pid_t *
                                 close(pdes[1]);                                  close(pdes[1]);
                 }                  }
                 SLIST_FOREACH(p, &pio_pidlist, next)                  SLIST_FOREACH(p, &pio_pidlist, next)
                        close(fileno(p->fp));#ifdef POPEN_STREAM
                         close(fileno(p->f.fp));
 #else
                         close(p->f.fd);
 #endif
                 execve(_PATH_BSHELL, argv, environ);                  execve(_PATH_BSHELL, argv, environ);
                 _exit(127);                  _exit(127);
                 /* NOTREACHED */                  /* NOTREACHED */
Line 111  e_popen(const char *command, const char *type, pid_t * Line 231  e_popen(const char *command, const char *type, pid_t *
   
         /* Parent; assume fdopen can't fail. */          /* Parent; assume fdopen can't fail. */
         if (*type == 'r') {          if (*type == 'r') {
                iop = fdopen(pdes[0], type);#ifdef POPEN_STREAM
                 cur->f.fp = fdopen(pdes[0], type);
 #else
                 cur->f.fd = pdes[0];
 #endif
                 close(pdes[1]);                  close(pdes[1]);
         } else {          } else {
                iop = fdopen(pdes[1], type);#ifdef POPEN_STREAM
                 cur->f.fp = fdopen(pdes[1], type);
 #else
                 cur->f.fd = pdes[1];
 #endif
                 close(pdes[0]);                  close(pdes[0]);
         }          }
   
         /* Link into list of file descriptors. */          /* Link into list of file descriptors. */
         cur->fp = iop;  
         cur->pid = pid;          cur->pid = pid;
         THREAD_LOCK();          THREAD_LOCK();
         SLIST_INSERT_HEAD(&pio_pidlist, cur, next);          SLIST_INSERT_HEAD(&pio_pidlist, cur, next);
         THREAD_UNLOCK();          THREAD_UNLOCK();
   
        return (iop);#ifdef POPEN_STREAM
         return cur->f.fp;
 #else
         return cur->f.fd;
 #endif
 }  }
   
 /*  /*
Line 135  e_popen(const char *command, const char *type, pid_t * Line 266  e_popen(const char *command, const char *type, pid_t *
  * return: -1 error or !=-1 pid status   * return: -1 error or !=-1 pid status
  */   */
 int  int
   #ifdef POPEN_STREAM
 e_pclose(FILE *iop)  e_pclose(FILE *iop)
   #else
   e_pclose(int iop)
   #endif
 {  {
        struct pid *cur, *last = NULL;        struct tagPIOPID *cur, *last = NULL;
        int pstat;        int pstat = 0;
         pid_t pid;          pid_t pid;
   
           if (!iop)
                   return -1;
   
         /*          /*
          * Find the appropriate file pointer and remove it from the list.           * Find the appropriate file pointer and remove it from the list.
          */           */
         THREAD_LOCK();          THREAD_LOCK();
         SLIST_FOREACH(cur, &pio_pidlist, next) {          SLIST_FOREACH(cur, &pio_pidlist, next) {
                if (cur->fp == iop)#ifdef POPEN_STREAM
                 if (cur->f.fp == iop)
 #else
                 if (cur->f.fd == iop)
 #endif
                         break;                          break;
                 last = cur;                  last = cur;
         }          }
        if (cur == NULL) {        if (!cur) {
                 THREAD_UNLOCK();                  THREAD_UNLOCK();
                 return (-1);                  return (-1);
         }          }
        if (last == NULL)        if (!last)
                 SLIST_REMOVE_HEAD(&pio_pidlist, next);                  SLIST_REMOVE_HEAD(&pio_pidlist, next);
         else          else
                 SLIST_REMOVE_AFTER(last, next);                  SLIST_REMOVE_AFTER(last, next);
         THREAD_UNLOCK();          THREAD_UNLOCK();
   
   #ifdef POPEN_STREAM
         fclose(iop);          fclose(iop);
   #else
           close(iop);
   #endif
   
         do {          do {
                pid = wait4(cur->pid, &pstat, 0, (struct rusage *)0);                pid = wait4(cur->pid, &pstat, 0, NULL);
         } while (pid == -1 && errno == EINTR);          } while (pid == -1 && errno == EINTR);
   
         e_free(cur);          e_free(cur);
   
         return (pid == -1 ? -1 : pstat);          return (pid == -1 ? -1 : pstat);
   }
   
   /*
    * pio_pgetpid() - Get tagPIOPID structure from file handle
    *
    * @iop = popen handle
    * return: NULL error or !=NULL tagPIOPID structure
    */
   struct tagPIOPID *
   #ifdef POPEN_STREAM
   pio_pgetpid(FILE *iop)
   #else
   pio_pgetpid(int iop)
   #endif
   {
           struct tagPIOPID *p;
   
           if (!iop)
                   return NULL;
   
           THREAD_LOCK();
           SLIST_FOREACH(p, &pio_pidlist, next)
   #ifdef POPEN_STREAM
                   if (p->f.fp == iop)
   #else
                   if (p->f.fd == iop)
   #endif
                           break;
           THREAD_UNLOCK();
   
           return p;
   }
   
   /*
    * pio_pchkpid() - Check exit status of child programs
    *
    * @pids = return tagPIOPID structures of exited programs, 
    *              if !=NULL must call array_Destroy()
    * return: -1 error or >-1 exited programs
    */
   int
   pio_pchkpid(array_t ** __restrict pids)
   {
           register int ret = 0;
           struct tagPIOPID *p;
           array_t *pa = NULL;
   
           if (pids) {
                   if (!(pa = array_Init(0)))
                           return -1;
                   else
                           *pids = pa;
           }
   
           THREAD_LOCK();
           SLIST_FOREACH(p, &pio_pidlist, next)
   #ifdef POPEN_STREAM
                   if (p->f.fp && waitpid(p->pid, &p->stat, WNOHANG) > 0) {
   #else
                   if (p->f.fd && waitpid(p->pid, &p->stat, WNOHANG) > 0) {
   #endif
                           if (pids)
                                   array_Push(pa, p, 0);
                           ret++;
                   }
           THREAD_UNLOCK();
   
           return ret;
 }  }
Removed from v.1.1.2.1  
changed lines
  Added in v.1.10

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