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Arquivotheca.AIX-4.1.3/bos/usr/lib/methods/chgpty/chgpty.c
seta75D d6fe8fe829 Init
2021-10-11 22:19:34 -03:00

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#ifndef lint
static char sccsid[] = "@(#)51 1.4 src/bos/usr/lib/methods/chgpty/chgpty.c, cfgmethods, bos411, 9428A410j 6/2/94 07:28:25";
#endif
/*
* COMPONENT_NAME: (CFGMETHODS) Change Method for streams based PTY
*
* FUNCTIONS: check_parms
*
* ORIGINS: 83
*
*/
/*
* LEVEL 1, 5 Years Bull Confidential Information
*/
#include <stdio.h>
#include <string.h>
#include <cf.h> /* Error codes */
#include <errno.h>
#include <sys/cfgdb.h>
#include <sys/cfgodm.h>
#include <sys/sysmacros.h>
#include <sys/sysconfig.h>
#include <sys/device.h>
#include <sys/mode.h>
#include <sys/types.h>
#include "cfgdebug.h"
#include "ttycfg.h"
#include "ptycfg.h"
#include "pparms.h"
/* Header file containing pty definition */
#include "spty.h"
/*
* ==============================================================================
* Defines and extern variables
* ==============================================================================
*/
extern int Pflag; /* Flag to change db only */
/*
* =============================================================================
* CHECK_PARMS
* =============================================================================
*
* This function checks the attributes to be changed for PTY.
* Needed work is done for ATTNUM_ATT and BSDNUM_ATT attributes.
* No more work is required and we don't want to go through the
* unconfigure/configure cycle ===> Pflag is set to 1.
*
* This function operates as a device dependent subroutine called
* by the generic change method for all devices. It is used to
* check the attributes to be changed for PTY.
*
* Return code: Exits with 0 on success, ODM error code otherwise.
* =============================================================================
*/
int check_parms(attList,ppflag,tflag,logicalName,parent,location,badlist)
struct attr * attList;
int ppflag, tflag;
char * logicalName;
char * parent;
char * location;
char * badlist;
{
extern char allattrs[]; /* attribute string for attrval() */
extern int attrval(); /* attribute values are in range ? */
extern int sptydds(); /* PTY DDS build */
extern int check_files(); /* Updating of PTY files */
extern int verify_space(); /* Verify file system space */
struct CuDv cus_dev; /* customized devices object storage */
struct PdDv pre_dev; /* predefined devices object storage */
mid_t kmid; /* module id from loader */
dev_t clone_devno; /* Used by sptydds and check_files */
struct spty_dds * spty_dds_ptr; /* DDS pointer */
struct cfg_dd cfg; /* sysconfig command structure */
char sstring[50]; /* search string */
char * badattr; /* ptr to list of invalid attributes */
int return_code; /* return code */
/* ================================================= */
/* Get the Customized Devices Object for this device */
/* ================================================= */
sprintf(sstring, "name = '%s'", logicalName);
return_code = (int)odm_get_obj(CuDv_CLASS, sstring, &cus_dev, ODM_FIRST);
switch (return_code) {
case 0: /* odm objects not found */
DEBUG_1 ("chgpty: CuDv %s found no objects.\n",sstring);
err_exit(E_NOCuDv);
break; /* To avoid bug if err_exit is suppressed */
case -1: /* odm error occurred */
DEBUG_1 ("chgpty: get_obj failed, %s.\n", sstring);
err_exit(E_ODMGET);
break; /* To avoid bug if err_exit is suppressed */
default: /* odm object found ==> That's OK */
DEBUG_1 ("chgpty: CuDv %s found objects.\n",sstring);
} /* End switch (return_code) */
/* ================================================================= */
/* Get the predefined object for this device. This object is located */
/* searching the predefined devices object class based on the unique */
/* type link descriptor in the customized device. */
/* ================================================================= */
/* search Predefined devices for object with this unique type */
sprintf(sstring, "uniquetype = '%s'", cus_dev.PdDvLn_Lvalue);
return_code = (int)odm_get_obj(PdDv_CLASS, sstring, &pre_dev, ODM_FIRST);
switch (return_code) {
case 0: /* odm objects not found */
DEBUG_1("chgpty: PdDv crit=%s found no objects.\n", sstring);
err_exit(E_NOPdDv);
break; /* To avoid bug if err_exit is suppressed */
case -1: /* odm error occurred */
DEBUG_1("chgpty: get_obj failed, crit=%s.\n", sstring);
err_exit(E_ODMGET);
break; /* To avoid bug if err_exit is suppressed */
default: /* odm object found ==> That's OK */
DEBUG_1("chgpty: PdDv uniquetype = %s found objects.\n",
cus_dev.PdDvLn_Lvalue);
} /* End switch (return_code) */
/* Validate attributes with attrval() routine */
DEBUG_2 ("chgpty: Calling attrval for %s with %s.\n",
cus_dev.PdDvLn_Lvalue, allattrs);
if (attrval(cus_dev.PdDvLn_Lvalue, allattrs, &badattr) > 0) {
DEBUG_0 ("chgpty: Attrval failed.\n");
strcpy(badlist, badattr);
return(E_ATTRVAL);
};
DEBUG_0("chgpty: Attrval finished OK.\n");
/* NULL first byte of allattrs, so generic change routine */
/* won't attempt to validate attributes */
allattrs[0] = '\0';
/* ============================================================ */
/* If ATTNUM_ATT or BSDNUM_ATT is changed, we do what is needed */
/* and, in all cases, we set Pflag to 1. It means that */
/* ODM databse will be updated but we don't go through */
/* the unconfigure/configure cycle. */
/* ============================================================ */
if ((cus_dev.status != (short) DEFINED) &&
(att_changed(attList, ATTNUM_ATT) || att_changed(attList, BSDNUM_ATT))) {
DEBUG_2("check_parms: '%s' or '%s' attribute is found\n",
ATTNUM_ATT, BSDNUM_ATT);
/* ========================================= */
/* Call loadext() to get device driver kmid. */
/* ========================================= */
if ((cfg.kmid = loadext(pre_dev.DvDr, FALSE, TRUE)) == NULL) {
DEBUG_2("chgpty: driver %s is not found, errno = %d\n",
pre_dev.DvDr, errno);
return(E_LOADEXT);
};
/* ======================== */
/* Build DDS for pty device */
/* ======================== */
DEBUG_0("chgpty: Building dds\n");
if (return_code = sptydds(&cus_dev, &spty_dds_ptr, pre_dev.DvDr, attList,
&clone_devno)) {
DEBUG_0("chgpty: error during PTY DDS building\n");
return(return_code);
};
/* ====================================================== */
/* Before configuring the driver, we need to be sure that */
/* there is enough space on file system to create needed */
/* inodes. */
/* ====================================================== */
if (verify_space(spty_dds_ptr) > 0) {
DEBUG_0("chgpty: There is enough file system space\n");
}
else
{
DEBUG_0("chgpty: There is not enough file system space\n");
return (E_MKSPECIAL);
}
/* ============================================= */
/* Call sysconfig() to configure the driver. */
/* The BSD master entry point is used because */
/* the BSD master major is generated with the */
/* effective PTY driver name */
/* I must be sure the PTY driver agree before updating */
/* PTY special files */
/* ============================================= */
cfg.ddsptr = (caddr_t)spty_dds_ptr;
cfg.ddslen = sizeof(*spty_dds_ptr);
cfg.devno = spty_dds_ptr->ptyp_dev;
cfg.cmd = CFG_INIT;
if (sysconfig(SYS_CFGDD, &cfg, sizeof(struct cfg_dd )) == -1) {
/* error configuring driver */
DEBUG_1("chgpty: error configuring driver, errno = %d\n", errno);
return(E_CFGINIT);
};
/* ================================================ */
/* Make the special files that this device will */
/* be accessed through. */
/* ================================================ */
if ((return_code = check_files(logicalName, &cus_dev, spty_dds_ptr,
clone_devno)) != 0) {
DEBUG_1("chgpty: error making special file for %s\n",
logicalName);
return(return_code);
};
}
else {
DEBUG_2("check_parms: No '%s', neither '%s' attribute is found\n",
ATTNUM_ATT, BSDNUM_ATT);
}
/* Make sure dbase change only flag is set */
/* Be careful: This is an extern variable and it can be updated somewhere else */
Pflag = 1;
return(0);
}
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