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/* $OpenBSD: extract.c,v 1.2 1996/06/04 08:43:32 niklas Exp $ */
#ifndef lint
static const char *rcsid = "$OpenBSD: extract.c,v 1.2 1996/06/04 08:43:32 niklas 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
*
* This is the package extraction code for the add module.
*
*/
#include "lib.h"
#include "add.h"
#define STARTSTRING "tar cf -"
#define TOOBIG(str) ((strlen(str) + 6 + strlen(home) + where_count > maxargs) \
|| (strlen(str) + 6 + strlen(home) + perm_count > maxargs))
#define PUSHOUT(todir) /* push out string */ \
if (strlen(where_args) > sizeof(STARTSTRING)-1) { \
strcat(where_args, "|tar xf - -C "); \
strcat(where_args, todir); \
if (system(where_args)) \
barf("can't invoke tar pipeline"); \
strcpy(where_args, STARTSTRING); \
where_count = sizeof(STARTSTRING)-1; \
} \
if (perm_count) { \
if (!isdir(todir)) apply_perms(todir, perm_args); \
perm_args[0] = 0;\
perm_count = 0; \
}
void
extract_plist(char *home, Package *pkg)
{
PackingList p = pkg->head;
char *last_file;
char *where_args, *perm_args, *last_chdir;
int maxargs, where_count = 0, perm_count = 0, add_count;
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");
perm_args = malloc(maxargs);
if (!perm_args)
barf("can't get argument list space");
strcpy(where_args, STARTSTRING);
where_count = sizeof(STARTSTRING)-1;
perm_args[0] = 0;
last_chdir = 0;
/* Reset the world */
Owner = NULL;
Group = NULL;
Mode = NULL;
last_file = NULL;
Directory = home;
/* Do it */
while (p) {
char cmd[FILENAME_MAX];
switch(p->type) {
case PLIST_NAME:
PkgName = p->name;
if (Verbose)
printf("extract: Package name is %s\n", p->name);
break;
case PLIST_FILE:
last_file = p->name;
if (Verbose)
printf("extract: %s/%s\n", Directory, p->name);
if (!Fake) {
char try[FILENAME_MAX];
/* first try to rename it into place */
sprintf(try, "%s/%s", Directory, p->name);
if (rename(p->name, try) == 0) {
/* try to add to list of perms to be changed,
and run in bulk. */
add_count = snprintf(&perm_args[perm_count],
maxargs - perm_count,
"%s ", p->name);
if (add_count > maxargs - perm_count)
barf("oops, miscounted strings!");
perm_count += add_count;
if (p->name[0] == '/') {
PUSHOUT(Directory);
}
} else {
/* rename failed, try copying with a big tar command */
if (p->name[0] == '/' ||
TOOBIG(p->name) ||
last_chdir != Directory) {
PUSHOUT(last_chdir);
last_chdir = Directory;
}
add_count = snprintf(&where_args[where_count],
maxargs - where_count,
" %s", p->name);
if (add_count > maxargs - where_count)
barf("oops, miscounted strings!");
where_count += add_count;
add_count = snprintf(&perm_args[perm_count],
maxargs - perm_count,
"%s ", p->name);
if (add_count > maxargs - perm_count)
barf("oops, miscounted strings!");
perm_count += add_count;
if (p->name[0] == '/') {
PUSHOUT(Directory);
}
}
}
break;
case PLIST_CWD:
if (Verbose)
printf("extract: CWD to %s\n", p->name);
PUSHOUT(Directory);
if (strcmp(p->name, ".")) {
if (!Fake && make_hierarchy(p->name) == FAIL)
barf("Unable make directory '%s'.", p->name);
Directory = p->name;
}
else
Directory = home;
break;
case PLIST_CMD:
format_cmd(cmd, p->name, Directory, last_file);
PUSHOUT(Directory);
if (Verbose)
printf("extract: execute '%s'\n", cmd);
if (!Fake && system(cmd))
whinge("Command '%s' failed.", cmd);
break;
case PLIST_CHMOD:
PUSHOUT(Directory);
Mode = p->name;
break;
case PLIST_CHOWN:
PUSHOUT(Directory);
Owner = p->name;
break;
case PLIST_CHGRP:
PUSHOUT(Directory);
Group = p->name;
break;
case PLIST_COMMENT:
break;
case PLIST_IGNORE:
p = p->next;
break;
}
p = p->next;
}
PUSHOUT(Directory);
}
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