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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2004 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#include <stdlib.h>
#include <string.h>
#include <vroot/vroot.h>
#include <vroot/args.h>
#include <string.h>
#include <sys/param.h>
#include <sys/file.h>
typedef struct {
short init;
pathpt vector;
const char *env_var;
} vroot_patht;
typedef struct {
vroot_patht vroot;
vroot_patht path;
char full_path[MAXPATHLEN+1];
char *vroot_start;
char *path_start;
char *filename_start;
int scan_vroot_first;
int cpp_style_path;
} vroot_datat, *vroot_datapt;
static vroot_datat vroot_data= {
{ 0, NULL, "VIRTUAL_ROOT"},
{ 0, NULL, "PATH"},
"", NULL, NULL, NULL, 0, 1};
void
add_dir_to_path(const char *path, register pathpt *pointer, register int position)
{
register int size= 0;
register int length;
register char *name;
register pathcellpt p;
pathpt new_path;
if (*pointer != NULL) {
for (p= &((*pointer)[0]); p->path != NULL; p++, size++);
if (position < 0)
position= size;}
else
if (position < 0)
position= 0;
if (position >= size) {
new_path= (pathpt)calloc((unsigned)(position+2), sizeof(pathcellt));
if (*pointer != NULL) {
memcpy((char *)new_path,(char *)(*pointer), size*sizeof(pathcellt));
free((char *)(*pointer));};
*pointer= new_path;};
length= strlen(path);
name= (char *)malloc((unsigned)(length+1));
(void)strcpy(name, path);
if ((*pointer)[position].path != NULL)
free((*pointer)[position].path);
(*pointer)[position].path= name;
(*pointer)[position].length= length;
}
pathpt
parse_path_string(register char *string, register int remove_slash)
{
register char *p;
pathpt result= NULL;
if (string != NULL)
for (; 1; string= p+1) {
if (p= strchr(string, ':')) *p= 0;
if ((remove_slash == 1) && !strcmp(string, "/"))
add_dir_to_path("", &result, -1);
else
add_dir_to_path(string, &result, -1);
if (p) *p= ':';
else return(result);};
return((pathpt)NULL);
}
const char *
get_vroot_name(void)
{
return(vroot_data.vroot.env_var);
}
const char *
get_path_name(void)
{
return(vroot_data.path.env_var);
}
void
flush_path_cache(void)
{
vroot_data.path.init= 0;
}
void
flush_vroot_cache(void)
{
vroot_data.vroot.init= 0;
}
void
scan_path_first(void)
{
vroot_data.scan_vroot_first= 0;
}
void
scan_vroot_first(void)
{
vroot_data.scan_vroot_first= 1;
}
void
set_path_style(int style)
{
vroot_data.cpp_style_path= style;
}
char *
get_vroot_path(register char **vroot, register char **path, register char **filename)
{
if (vroot != NULL) {
if ((*vroot= vroot_data.vroot_start) == NULL)
if ((*vroot= vroot_data.path_start) == NULL)
*vroot= vroot_data.filename_start;};
if (path != NULL) {
if ((*path= vroot_data.path_start) == NULL)
*path= vroot_data.filename_start;};
if (filename != NULL)
*filename= vroot_data.filename_start;
return(vroot_data.full_path);
}
void
translate_with_thunk(register char *filename, int (*thunk) (char *), pathpt path_vector, pathpt vroot_vector, rwt rw)
{
register pathcellt *vp;
pathcellt *pp;
register pathcellt *pp1;
register char *p;
int flags[256];
/* Setup path to use */
if (rw == rw_write)
pp1= NULL; /* Do not use path when writing */
else {
if (path_vector == VROOT_DEFAULT) {
if (!vroot_data.path.init) {
vroot_data.path.init= 1;
vroot_data.path.vector= parse_path_string(getenv(vroot_data.path.env_var), 0);};
path_vector= vroot_data.path.vector;};
pp1= path_vector == NULL ? NULL : &(path_vector)[0];};
/* Setup vroot to use */
if (vroot_vector == VROOT_DEFAULT) {
if (!vroot_data.vroot.init) {
vroot_data.vroot.init= 1;
vroot_data.vroot.vector= parse_path_string(getenv(vroot_data.vroot.env_var), 1);};
vroot_vector= vroot_data.vroot.vector;};
vp= vroot_vector == NULL ? NULL : &(vroot_vector)[0];
/* Setup to remember pieces */
vroot_data.vroot_start= NULL;
vroot_data.path_start= NULL;
vroot_data.filename_start= NULL;
int flen = strlen(filename);
if(flen >= MAXPATHLEN) {
errno = ENAMETOOLONG;
return;
}
switch ((vp ?1:0) + (pp1 ? 2:0)) {
case 0: /* No path. No vroot. */
use_name:
(void)strcpy(vroot_data.full_path, filename);
vroot_data.filename_start= vroot_data.full_path;
(void)(*thunk)(vroot_data.full_path);
return;
case 1: /* No path. Vroot */
if (filename[0] != '/') goto use_name;
for (; vp->path != NULL; vp++) {
if((1 + flen + vp->length) >= MAXPATHLEN) {
errno = ENAMETOOLONG;
continue;
}
p= vroot_data.full_path;
(void)strcpy(vroot_data.vroot_start= p, vp->path);
p+= vp->length;
(void)strcpy(vroot_data.filename_start= p, filename);
if ((*thunk)(vroot_data.full_path)) return;};
(void)strcpy(vroot_data.full_path, filename);
return;
case 2: /* Path. No vroot. */
if (vroot_data.cpp_style_path) {
if (filename[0] == '/') goto use_name;
} else {
if (strchr(filename, '/') != NULL) goto use_name;
};
for (; pp1->path != NULL; pp1++) {
p= vroot_data.full_path;
if((1 + flen + pp1->length) >= MAXPATHLEN) {
errno = ENAMETOOLONG;
continue;
}
if (vroot_data.cpp_style_path) {
(void)strcpy(vroot_data.path_start= p, pp1->path);
p+= pp1->length;
*p++= '/';
} else {
if (pp1->length != 0) {
(void)strcpy(vroot_data.path_start= p,
pp1->path);
p+= pp1->length;
*p++= '/';
};
};
(void)strcpy(vroot_data.filename_start= p, filename);
if ((*thunk)(vroot_data.full_path)) return;};
(void)strcpy(vroot_data.full_path, filename);
return;
case 3: { /* Path. Vroot. */
int *rel_path, path_len= 1;
if (vroot_data.scan_vroot_first == 0) {
for (pp= pp1; pp->path != NULL; pp++) path_len++;
rel_path= flags;
for (path_len-= 2; path_len >= 0; path_len--) rel_path[path_len]= 0;
for (; vp->path != NULL; vp++)
for (pp= pp1, path_len= 0; pp->path != NULL; pp++, path_len++) {
int len = 0;
if (rel_path[path_len] == 1) continue;
if (pp->path[0] != '/') rel_path[path_len]= 1;
p= vroot_data.full_path;
if ((filename[0] == '/') || (pp->path[0] == '/')) {
if(vp->length >= MAXPATHLEN) {
errno = ENAMETOOLONG;
continue;
}
(void)strcpy(vroot_data.vroot_start= p, vp->path); p+= vp->length;
len += vp->length;
};
if (vroot_data.cpp_style_path) {
if (filename[0] != '/') {
if(1 + len + pp->length >= MAXPATHLEN) {
errno = ENAMETOOLONG;
continue;
}
(void)strcpy(vroot_data.path_start= p, pp->path); p+= pp->length;
*p++= '/';
len += 1 + pp->length;
};
} else {
if (strchr(filename, '/') == NULL) {
if (pp->length != 0) {
if(1 + len + pp->length >= MAXPATHLEN) {
errno = ENAMETOOLONG;
continue;
}
(void)strcpy(vroot_data.path_start= p,
pp->path);
p+= pp->length;
*p++= '/';
len += 1 + pp->length;
}
}
};
(void)strcpy(vroot_data.filename_start= p, filename);
if ((*thunk)(vroot_data.full_path)) return;};}
else { pathcellt *vp1= vp;
for (pp= pp1, path_len= 0; pp->path != NULL; pp++, path_len++)
for (vp= vp1; vp->path != NULL; vp++) {
int len = 0;
p= vroot_data.full_path;
if ((filename[0] == '/') || (pp->path[0] == '/')) {
if(vp->length >= MAXPATHLEN) {
errno = ENAMETOOLONG;
continue;
}
(void)strcpy(vroot_data.vroot_start= p, vp->path); p+= vp->length;
len += vp->length;
}
if (vroot_data.cpp_style_path) {
if (filename[0] != '/') {
if(1 + len + pp->length >= MAXPATHLEN) {
errno = ENAMETOOLONG;
continue;
}
(void)strcpy(vroot_data.path_start= p, pp->path); p+= pp->length;
*p++= '/';
len += 1 + pp->length;
}
} else {
if (strchr(filename, '/') == NULL) {
if(1 + len + pp->length >= MAXPATHLEN) {
errno = ENAMETOOLONG;
continue;
}
(void)strcpy(vroot_data.path_start= p, pp->path); p+= pp->length;
*p++= '/';
len += 1 + pp->length;
}
}
(void)strcpy(vroot_data.filename_start= p, filename);
if ((*thunk)(vroot_data.full_path)) return;};};
(void)strcpy(vroot_data.full_path, filename);
return;};};
}
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