freebsd-skq/usr.sbin/pkg_install/lib/pen.c

106 lines
2.6 KiB
C

#ifndef lint
static const char *rcsid = "$Id: pen.c,v 1.6 1994/10/14 05:42:24 jkh 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 managing the "play pen".
*
*/
#include "lib.h"
#include <sys/param.h>
#include <sys/mount.h>
/* For keeping track of where we are */
static char Cwd[FILENAME_MAX];
static char Pen[FILENAME_MAX];
static long min_free(char *);
/*
* Make a temporary directory to play in and chdir() to it, returning
* pathname of previous working directory.
*/
char *
make_playpen(char *pen, size_t sz)
{
if (!pen) {
char *cp;
if ((cp = getenv("TMPDIR")) != NULL)
sprintf(Pen, "%s/instmp.XXXXXX", cp);
else
strcpy(Pen, "/tmp/instmp.XXXXXX");
}
else
strcpy(Pen, pen);
if (!getcwd(Cwd, FILENAME_MAX))
upchuck("getcwd");
if (!mktemp(Pen))
barf("Can't mktemp '%s'.", Pen);
if (mkdir(Pen, 0755) == FAIL)
barf("Can't mkdir '%s'.", Pen);
if (Verbose) {
if (!sz)
fprintf(stderr, "Free temp space: %d bytes\n", min_free(Pen));
else
fprintf(stderr, "Projected package size: %d bytes, free temp space: %d bytes\n", (int)sz, min_free(Pen));
}
if (min_free(Pen) < sz) {
rmdir(Pen);
barf("%s doesn't have enough free space. Please set your TMPDIR\nenvironment variable to a location with more space and\ntry the command again.", Pen);
}
if (chdir(Pen) == FAIL)
barf("Can't chdir to '%s'.", Pen);
return Cwd;
}
/* Convenience routine for getting out of playpen */
void
leave_playpen(void)
{
if (Cwd[0]) {
if (chdir(Cwd) == FAIL)
barf("Can't chdir back to '%s'.", Cwd);
if (vsystem("rm -rf %s", Pen))
fprintf(stderr, "Couldn't remove temporary dir '%s'\n", Pen);
Cwd[0] = '\0';
}
}
/* Accessor function for telling us where the pen is */
char *
where_playpen(void)
{
if (Cwd[0])
return Pen;
else
return NULL;
}
static long min_free(char *tmpdir)
{
struct statfs buf;
if (statfs(tmpdir, &buf) != 0) {
perror("Error in statfs");
return -1;
}
return buf.f_bavail * buf.f_bsize;
}