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close open files not associated with stdio before exec'ing the

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repeater
This commit is contained in:
Jeff Hill
1999-07-16 17:05:43 +00:00
parent 5df25bf67a
commit 27229f9c14
1 changed files with 54 additions and 105 deletions
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159
src/ca/posix_depen.c
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@@ -1,5 +1,5 @@
/*
* $Id$
* $Id$
* Author: Jeffrey O. Hill
* hill@luke.lanl.gov
* (505) 665 1831
@@ -26,48 +26,6 @@
* Advanced Photon Source
* Argonne National Laboratory
*
* Modification Log:
* -----------------
* $Log$
* Revision 1.27 1999/05/11 20:09:58 jhill
* close all open files when spawning the repeater
*
* Revision 1.26 1999/05/11 19:42:44 jhill
* close all open files when spawning the repeater
*
* Revision 1.25 1998/08/12 16:36:54 jhill
* allow the user name to change when they use su
*
* Revision 1.24 1998/04/13 19:14:34 jhill
* fixed task variable problem
*
* Revision 1.23 1997/08/04 23:37:14 jhill
* added beacon anomaly flag init/allow ip 255.255.255.255
*
* Revision 1.22 1997/06/13 09:14:23 jhill
* connect/search proto changes
*
* Revision 1.21 1997/04/10 19:26:17 jhill
* asynch connect, faster connect, ...
*
* Revision 1.20 1996/11/02 00:51:02 jhill
* many pc port, const in API, and other changes
*
* Revision 1.19 1996/07/09 22:41:02 jhill
* pass nill 2nd arg to gettimeofday()
*
* Revision 1.18 1996/06/20 21:19:29 jhill
* fixed posix signal problem with "cc -Xc"
*
* Revision 1.17 1995/12/19 19:33:42 jhill
* added missing arg to execlp()
*
* Revision 1.16 1995/10/12 01:35:28 jhill
* Moved cac_mux_io() to iocinf.c
*
* Revision 1.15 1995/08/22 00:22:07 jhill
* Dont recompute connection timers if the time stamp hasnt changed
*
*
*/
@@ -76,7 +34,6 @@
#include "iocinf.h"
/*
* cac_gettimeval
*/
@@ -91,13 +48,12 @@ void cac_gettimeval(struct timeval *pt)
assert(status == 0);
}
/*
* cac_block_for_io_completion()
*/
void cac_block_for_io_completion(struct timeval *pTV)
{
cac_mux_io (pTV);
cac_mux_io (pTV, TRUE);
}
/*
@@ -105,10 +61,9 @@ void cac_block_for_io_completion(struct timeval *pTV)
*/
void cac_block_for_sg_completion(CASG *pcasg, struct timeval *pTV)
{
cac_mux_io (pTV);
cac_mux_io (pTV, TRUE);
}
/*
* os_specific_sg_io_complete()
*/
@@ -116,18 +71,17 @@ void os_specific_sg_io_complete(CASG *pcasg)
{
}
/*
* does nothing but satisfy undefined
*/
void os_specific_sg_create(CASG *pcasg)
{
}
void os_specific_sg_delete(CASG *pcasg)
{
}
/*
* CAC_ADD_TASK_VARIABLE()
*/
@@ -137,7 +91,6 @@ int cac_add_task_variable(struct CA_STATIC *ca_temp)
return ECA_NORMAL;
}
/*
* ca_task_initialize()
*/
@@ -160,7 +113,6 @@ int epicsShareAPI ca_task_initialize(void)
return status;
}
/*
* ca_task_exit ()
*
@@ -177,12 +129,11 @@ int epicsShareAPI ca_task_exit (void)
ca_static = NULL;
return ECA_NORMAL;
}
/*
*
* This should work on any POSIX compliant OS
*
* o Indicates failure by setting ptr to nill
*/
char *localUserName()
{
@@ -238,67 +189,65 @@ int max_unix_fd( )
return max;
}
/*
* ca_spawn_repeater()
*/
void ca_spawn_repeater()
{
int status;
char *pImageName;
int fd;
int maxfd;
char *pImageName;
int fd;
int maxfd;
/*
* create a duplicate process
*/
status = fork();
if (status < 0){
SEVCHK(ECA_NOREPEATER, NULL);
return;
}
/*
* create a duplicate process
*/
status = fork();
if (status < 0){
SEVCHK(ECA_NOREPEATER, NULL);
return;
}
/*
* return to the caller
* if its in the initiating process
*/
if (status) {
return;
}
/*
* return to the caller
* if its in the initiating process
*/
if (status) {
return;
}
/*
* close all open files except for STDIO so they will not
* be inherited by the repeater task
*/
maxfd = max_unix_fd ();
for (fd = 0; fd<=maxfd; fd++) {
if (fd==STDIN_FILENO) continue;
if (fd==STDOUT_FILENO) continue;
if (fd==STDERR_FILENO) continue;
close (fd);
}
/*
* running in the repeater process
* if here
*/
pImageName = "caRepeater";
status = execlp(pImageName, pImageName, NULL);
if(status<0){
ca_printf("!!WARNING!!\n");
ca_printf("The executable \"%s\" couldnt be located\n", pImageName);
ca_printf("because of errno = \"%s\"\n", strerror(errno));
ca_printf("You may need to modify your PATH environment variable.\n");
ca_printf("Creating CA repeater with fork() system call.\n");
ca_printf("Repeater will inherit parents process name and resources.\n");
ca_printf("Duplicate resource consumption may occur.\n");
ca_repeater();
assert(0);
}
exit(0);
/*
* close all open files except for STDIO so they will not
* be inherited by the repeater task
*/
maxfd = max_unix_fd ();
for (fd = 0; fd<=maxfd; fd++) {
if (fd==STDIN_FILENO) continue;
if (fd==STDOUT_FILENO) continue;
if (fd==STDERR_FILENO) continue;
close (fd);
}
/*
* running in the repeater process
* if here
*/
pImageName = "caRepeater";
status = execlp(pImageName, pImageName, NULL);
if(status<0){
ca_printf("!!WARNING!!\n");
ca_printf("The executable \"%s\" couldnt be located\n", pImageName);
ca_printf("because of errno = \"%s\"\n", strerror(errno));
ca_printf("You may need to modify your PATH environment variable.\n");
ca_printf("Creating CA repeater with fork() system call.\n");
ca_printf("Repeater will inherit parents process name and resources.\n");
ca_printf("Duplicate resource consumption may occur.\n");
ca_repeater();
assert(0);
}
exit(0);
}
/*
* caSetDefaultPrintfHandler ()
* use the normal default here