1327Sjkh/* 2228990Suqs * FreeBSD install - a package for the installation and maintenance 3327Sjkh * of non-core utilities. 4327Sjkh * 5327Sjkh * Redistribution and use in source and binary forms, with or without 6327Sjkh * modification, are permitted provided that the following conditions 7327Sjkh * are met: 8327Sjkh * 1. Redistributions of source code must retain the above copyright 9327Sjkh * notice, this list of conditions and the following disclaimer. 10327Sjkh * 2. Redistributions in binary form must reproduce the above copyright 11327Sjkh * notice, this list of conditions and the following disclaimer in the 12327Sjkh * documentation and/or other materials provided with the distribution. 13327Sjkh * 14327Sjkh * Jordan K. Hubbard 15327Sjkh * 18 July 1993 16327Sjkh * 17327Sjkh * Routines for managing the "play pen". 18327Sjkh * 19327Sjkh */ 20327Sjkh 2193520Sobrien#include <sys/cdefs.h> 2293520Sobrien__FBSDID("$FreeBSD: releng/10.2/usr.sbin/pkg_install/lib/pen.c 228990 2011-12-30 10:58:14Z uqs $"); 2393520Sobrien 2474699Ssobomax#include "lib.h" 2530221Scharnier#include <err.h> 26181376Sphk#include <libutil.h> 2784795Ssobomax#include <libgen.h> 288075Sjkh#include <sys/signal.h> 293364Sjkh#include <sys/param.h> 303364Sjkh#include <sys/mount.h> 31327Sjkh 32327Sjkh/* For keeping track of where we are */ 3333427Sjkhstatic char PenLocation[FILENAME_MAX]; 34327Sjkh 3511780Sjkhchar * 3611780Sjkhwhere_playpen(void) 3711780Sjkh{ 3833427Sjkh return PenLocation; 3911780Sjkh} 4011780Sjkh 4110085Sjkh/* Find a good place to play. */ 4210085Sjkhstatic char * 4384745Ssobomaxfind_play_pen(char *pen, off_t sz) 4410085Sjkh{ 4510085Sjkh char *cp; 4610085Sjkh struct stat sb; 47181376Sphk char humbuf[6]; 4810085Sjkh 4986402Ssobomax if (pen[0] && isdir(dirname(pen)) == TRUE && (min_free(dirname(pen)) >= sz)) 5011780Sjkh return pen; 5111780Sjkh else if ((cp = getenv("PKG_TMPDIR")) != NULL && stat(cp, &sb) != FAIL && (min_free(cp) >= sz)) 5211780Sjkh sprintf(pen, "%s/instmp.XXXXXX", cp); 5310085Sjkh else if ((cp = getenv("TMPDIR")) != NULL && stat(cp, &sb) != FAIL && (min_free(cp) >= sz)) 5411780Sjkh sprintf(pen, "%s/instmp.XXXXXX", cp); 5510085Sjkh else if (stat("/var/tmp", &sb) != FAIL && min_free("/var/tmp") >= sz) 5611780Sjkh strcpy(pen, "/var/tmp/instmp.XXXXXX"); 5710085Sjkh else if (stat("/tmp", &sb) != FAIL && min_free("/tmp") >= sz) 5811780Sjkh strcpy(pen, "/tmp/instmp.XXXXXX"); 5911780Sjkh else if ((stat("/usr/tmp", &sb) == SUCCESS || mkdir("/usr/tmp", 01777) == SUCCESS) && min_free("/usr/tmp") >= sz) 6011780Sjkh strcpy(pen, "/usr/tmp/instmp.XXXXXX"); 6111780Sjkh else { 6230221Scharnier cleanup(0); 63181376Sphk humanize_number(humbuf, sizeof humbuf, sz, "", HN_AUTOSCALE, 64181376Sphk HN_NOSPACE); 6596388Salfred errx(2, 6696388Salfred"%s: can't find enough temporary space to extract the files, please set your\n" 67181376Sphk"PKG_TMPDIR environment variable to a location with at least %s bytes\n" 68181376Sphk"free", __func__, humbuf); 6911780Sjkh return NULL; 7011780Sjkh } 7111780Sjkh return pen; 7210085Sjkh} 7310085Sjkh 7435160Sjkh#define MAX_STACK 20 7535160Sjkhstatic char *pstack[MAX_STACK]; 7635160Sjkhstatic int pdepth = -1; 7735160Sjkh 78194497Sbrianstatic const char * 7984745SsobomaxpushPen(const char *pen) 8035160Sjkh{ 8135160Sjkh if (++pdepth == MAX_STACK) 8296392Salfred errx(2, "%s: stack overflow.\n", __func__); 8335160Sjkh pstack[pdepth] = strdup(pen); 84194497Sbrian 85194497Sbrian return pstack[pdepth]; 8635160Sjkh} 8735160Sjkh 8835160Sjkhstatic void 8935160SjkhpopPen(char *pen) 9035160Sjkh{ 9135160Sjkh if (pdepth == -1) { 9235160Sjkh pen[0] = '\0'; 9335160Sjkh return; 9435160Sjkh } 9535160Sjkh strcpy(pen, pstack[pdepth]); 9635160Sjkh free(pstack[pdepth--]); 9735160Sjkh} 9835160Sjkh 99327Sjkh/* 100327Sjkh * Make a temporary directory to play in and chdir() to it, returning 101327Sjkh * pathname of previous working directory. 102327Sjkh */ 103194497Sbrianconst char * 10484745Ssobomaxmake_playpen(char *pen, off_t sz) 105327Sjkh{ 106181376Sphk char humbuf1[6], humbuf2[6]; 107194497Sbrian char cwd[FILENAME_MAX]; 108181376Sphk 10911780Sjkh if (!find_play_pen(pen, sz)) 11011780Sjkh return NULL; 11111780Sjkh 11237900Snectar if (!mkdtemp(pen)) { 11330221Scharnier cleanup(0); 11496392Salfred errx(2, "%s: can't mktemp '%s'", __func__, pen); 1153364Sjkh } 11635160Sjkh 11711780Sjkh if (Verbose) { 118181376Sphk if (sz) { 119181376Sphk humanize_number(humbuf1, sizeof humbuf1, sz, "", HN_AUTOSCALE, 120181376Sphk HN_NOSPACE); 121181376Sphk humanize_number(humbuf2, sizeof humbuf2, min_free(pen), 122181376Sphk "", HN_AUTOSCALE, HN_NOSPACE); 123181376Sphk fprintf(stderr, "Requested space: %s bytes, free space: %s bytes in %s\n", humbuf1, humbuf2, pen); 124181376Sphk } 1253578Sjkh } 12635160Sjkh 12711780Sjkh if (min_free(pen) < sz) { 12811780Sjkh rmdir(pen); 12930221Scharnier cleanup(0); 13096388Salfred errx(2, "%s: not enough free space to create '%s'.\n" 13111780Sjkh "Please set your PKG_TMPDIR environment variable to a location\n" 13296392Salfred "with more space and\ntry the command again", __func__, pen); 1333364Sjkh } 13435160Sjkh 135194497Sbrian if (!getcwd(cwd, FILENAME_MAX)) { 13611780Sjkh upchuck("getcwd"); 13711780Sjkh return NULL; 13811780Sjkh } 13935160Sjkh 14039068Sjkh if (chdir(pen) == FAIL) { 14139068Sjkh cleanup(0); 14296392Salfred errx(2, "%s: can't chdir to '%s'", __func__, pen); 14339068Sjkh } 14435160Sjkh 14533427Sjkh strcpy(PenLocation, pen); 146194497Sbrian return pushPen(cwd); 147327Sjkh} 148327Sjkh 149327Sjkh/* Convenience routine for getting out of playpen */ 150194497Sbrianint 15133427Sjkhleave_playpen() 152327Sjkh{ 153194497Sbrian static char left[FILENAME_MAX]; 1548075Sjkh void (*oldsig)(int); 1558075Sjkh 156194497Sbrian if (!PenLocation[0]) 157194497Sbrian return 0; 158194497Sbrian 1598075Sjkh /* Don't interrupt while we're cleaning up */ 1608075Sjkh oldsig = signal(SIGINT, SIG_IGN); 161194497Sbrian strcpy(left, PenLocation); 162194497Sbrian popPen(PenLocation); 163194497Sbrian 164194497Sbrian if (chdir(PenLocation) == FAIL) { 165194497Sbrian cleanup(0); 166194497Sbrian errx(2, "%s: can't chdir back to '%s'", __func__, PenLocation); 16735160Sjkh } 168194497Sbrian 169194497Sbrian if (left[0] == '/' && vsystem("/bin/rm -rf %s", left)) 170194497Sbrian warnx("couldn't remove temporary dir '%s'", left); 1718075Sjkh signal(SIGINT, oldsig); 172194497Sbrian 173194497Sbrian return 1; 174327Sjkh} 175327Sjkh 17616179Salexoff_t 17784745Ssobomaxmin_free(const char *tmpdir) 1783364Sjkh{ 1793364Sjkh struct statfs buf; 1803364Sjkh 1813364Sjkh if (statfs(tmpdir, &buf) != 0) { 18230221Scharnier warn("statfs"); 1833364Sjkh return -1; 1843364Sjkh } 18516179Salex return (off_t)buf.f_bavail * (off_t)buf.f_bsize; 1863364Sjkh} 187