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#ifndef lint
static const char *rcsid = "$Id: pl.c,v 1.7 1995/05/30 03:49:56 rgrimes Exp $";
#endif
/*
* FreeBSD install - a package for the installation and maintainance
* of non-core utilities.
*
* 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.
*
* Jordan K. Hubbard
* 18 July 1993
*
* Routines for dealing with the packing list.
*
*/
#include "lib.h"
#include "create.h"
#include <errno.h>
#include <md5.h>
/* Check a list for files that require preconversion */
void
check_list(char *home, Package *pkg)
{
char *where = home;
char *there = NULL;
PackingList p = pkg->head;
while (p) {
if (p->type == PLIST_CWD)
where = p->name;
else if (p->type == PLIST_IGNORE)
p = p->next;
else if (p->type == PLIST_SRC) {
there = p->name;
}
else if (p->type == PLIST_FILE) {
char *cp, name[FILENAME_MAX], buf[33];
sprintf(name, "%s/%s", there ? there : where, p->name);
if ((cp = MD5File(name, buf)) != NULL) {
PackingList tmp = new_plist_entry();
tmp->name = copy_string(strconcat("MD5:", cp));
tmp->type = PLIST_COMMENT;
tmp->next = p->next;
tmp->prev = p;
p->next = tmp;
p = tmp;
}
}
p = p->next;
}
}
static int
trylink(const char *from, const char *to)
{
if (link(from, to) == 0)
return 0;
if (errno == ENOENT) {
/* try making the container directory */
char *cp = strrchr(to, '/');
if (cp)
vsystem("mkdir -p %.*s", cp - to,
to);
return link(from, to);
}
return -1;
}
#define STARTSTRING "tar cf -"
#define TOOBIG(str) strlen(str) + 6 + strlen(home) + where_count > maxargs
#define PUSHOUT() /* push out string */ \
if (where_count > sizeof(STARTSTRING)-1) { \
strcat(where_args, "|tar xpf -"); \
if (system(where_args)) \
barf("can't invoke tar pipeline"); \
memset(where_args, 0, maxargs); \
last_chdir = NULL; \
strcpy(where_args, STARTSTRING); \
where_count = sizeof(STARTSTRING)-1; \
}
/*
* Copy unmarked files in packing list to playpen - marked files
* have already been copied in an earlier pass through the list.
*/
void
copy_plist(char *home, Package *plist)
{
PackingList p = plist->head;
char *where = home;
char *there = NULL, *mythere;
char *where_args, *last_chdir, *root = "/";
int maxargs, where_count = 0, add_count;
struct stat stb;
dev_t curdir;
maxargs = sysconf(_SC_ARG_MAX);
maxargs -= 64; /* some slop for the tar cmd text,
and sh -c */
where_args = malloc(maxargs);
if (!where_args)
barf("can't get argument list space");
memset(where_args, 0, maxargs);
strcpy(where_args, STARTSTRING);
where_count = sizeof(STARTSTRING)-1;
last_chdir = 0;
if (stat(".", &stb) == 0)
curdir = stb.st_dev;
else
curdir = (dev_t) -1; /* It's ok if this is a valid dev_t;
this is just a hint for an
optimization. */
while (p) {
if (p->type == PLIST_CWD)
where = p->name;
else if (p->type == PLIST_SRC)
there = p->name;
else if (p->type == PLIST_IGNORE)
p = p->next;
else if (p->type == PLIST_FILE && !p->marked) {
char fn[FILENAME_MAX];
/* First, look for it in the "home" dir */
sprintf(fn, "%s/%s", home, p->name);
if (fexists(fn)) {
if (lstat(fn, &stb) == 0 && stb.st_dev == curdir &&
S_ISREG(stb.st_mode)) {
/* if we can link it to the playpen, that avoids a copy
and saves time. */
if (p->name[0] != '/') {
/* don't link abspn stuff--it doesn't come from
local dir! */
if (trylink(fn, p->name) == 0) {
p = p->next;
continue;
}
}
}
if (TOOBIG(fn)) {
PUSHOUT();
}
if (p->name[0] == '/') {
add_count = snprintf(&where_args[where_count],
maxargs - where_count,
" %s %s",
last_chdir == root ? "" : "-C /",
p->name);
last_chdir = root;
} else {
add_count = snprintf(&where_args[where_count],
maxargs - where_count,
" %s%s %s",
last_chdir == home ? "" : "-C ",
last_chdir == home ? "" : home,
p->name);
last_chdir = home;
}
if (add_count > maxargs - where_count)
barf("oops, miscounted strings!");
where_count += add_count;
}
/*
* Otherwise, try along the actual extraction path..
*/
else {
if (p->name[0] == '/')
mythere = root;
else mythere = there;
sprintf(fn, "%s/%s", mythere ? mythere : where, p->name);
if (lstat(fn, &stb) == 0 && stb.st_dev == curdir &&
S_ISREG(stb.st_mode)) {
/* if we can link it to the playpen, that avoids a copy
and saves time. */
if (trylink(fn, p->name) == 0) {
p = p->next;
continue;
}
}
if (TOOBIG(p->name)) {
PUSHOUT();
}
if (last_chdir == (mythere ? mythere : where))
add_count = snprintf(&where_args[where_count],
maxargs - where_count,
" %s", p->name);
else
add_count = snprintf(&where_args[where_count],
maxargs - where_count,
" -C %s %s",
mythere ? mythere : where,
p->name);
if (add_count > maxargs - where_count)
barf("oops, miscounted strings!");
where_count += add_count;
last_chdir = (mythere ? mythere : where);
}
}
p = p->next;
}
PUSHOUT();
free(where_args);
}
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