1/*
2 * FreeBSD install - a package for the installation and maintainance
3 * of non-core utilities.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * Jordan K. Hubbard
15 * 18 July 1993
16 *
17 * Routines for managing the "play pen".
18 *
19 */
20
21#include <sys/cdefs.h>
| 1/*
2 * FreeBSD install - a package for the installation and maintainance
3 * of non-core utilities.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * Jordan K. Hubbard
15 * 18 July 1993
16 *
17 * Routines for managing the "play pen".
18 *
19 */
20
21#include <sys/cdefs.h>
|
22__FBSDID("$FreeBSD: head/usr.sbin/pkg_install/lib/pen.c 194497 2009-06-19 17:07:38Z brian $");
| 22__FBSDID("$FreeBSD: head/usr.sbin/pkg_install/lib/pen.c 206043 2010-04-01 14:27:29Z flz $");
|
23
24#include "lib.h"
25#include <err.h>
26#include <libutil.h>
27#include <libgen.h>
28#include <sys/signal.h>
29#include <sys/param.h>
30#include <sys/mount.h>
31
32/* For keeping track of where we are */
33static char PenLocation[FILENAME_MAX];
34
35char *
36where_playpen(void)
37{
38 return PenLocation;
39}
40
41/* Find a good place to play. */
42static char *
43find_play_pen(char *pen, off_t sz)
44{
45 char *cp;
46 struct stat sb;
47 char humbuf[6];
48
49 if (pen[0] && isdir(dirname(pen)) == TRUE && (min_free(dirname(pen)) >= sz))
50 return pen;
51 else if ((cp = getenv("PKG_TMPDIR")) != NULL && stat(cp, &sb) != FAIL && (min_free(cp) >= sz))
52 sprintf(pen, "%s/instmp.XXXXXX", cp);
53 else if ((cp = getenv("TMPDIR")) != NULL && stat(cp, &sb) != FAIL && (min_free(cp) >= sz))
54 sprintf(pen, "%s/instmp.XXXXXX", cp);
55 else if (stat("/var/tmp", &sb) != FAIL && min_free("/var/tmp") >= sz)
56 strcpy(pen, "/var/tmp/instmp.XXXXXX");
57 else if (stat("/tmp", &sb) != FAIL && min_free("/tmp") >= sz)
58 strcpy(pen, "/tmp/instmp.XXXXXX");
59 else if ((stat("/usr/tmp", &sb) == SUCCESS || mkdir("/usr/tmp", 01777) == SUCCESS) && min_free("/usr/tmp") >= sz)
60 strcpy(pen, "/usr/tmp/instmp.XXXXXX");
61 else {
62 cleanup(0);
63 humanize_number(humbuf, sizeof humbuf, sz, "", HN_AUTOSCALE,
64 HN_NOSPACE);
65 errx(2,
66"%s: can't find enough temporary space to extract the files, please set your\n"
67"PKG_TMPDIR environment variable to a location with at least %s bytes\n"
68"free", __func__, humbuf);
69 return NULL;
70 }
71 return pen;
72}
73
74#define MAX_STACK 20
75static char *pstack[MAX_STACK];
76static int pdepth = -1;
77
78static const char *
79pushPen(const char *pen)
80{
81 if (++pdepth == MAX_STACK)
82 errx(2, "%s: stack overflow.\n", __func__);
83 pstack[pdepth] = strdup(pen);
84
85 return pstack[pdepth];
86}
87
88static void
89popPen(char *pen)
90{
91 if (pdepth == -1) {
92 pen[0] = '\0';
93 return;
94 }
95 strcpy(pen, pstack[pdepth]);
96 free(pstack[pdepth--]);
97}
98
99/*
100 * Make a temporary directory to play in and chdir() to it, returning
101 * pathname of previous working directory.
102 */
103const char *
104make_playpen(char *pen, off_t sz)
105{
106 char humbuf1[6], humbuf2[6];
107 char cwd[FILENAME_MAX];
108
109 if (!find_play_pen(pen, sz))
110 return NULL;
111
112 if (!mkdtemp(pen)) {
113 cleanup(0);
114 errx(2, "%s: can't mktemp '%s'", __func__, pen);
115 }
| 23
24#include "lib.h"
25#include <err.h>
26#include <libutil.h>
27#include <libgen.h>
28#include <sys/signal.h>
29#include <sys/param.h>
30#include <sys/mount.h>
31
32/* For keeping track of where we are */
33static char PenLocation[FILENAME_MAX];
34
35char *
36where_playpen(void)
37{
38 return PenLocation;
39}
40
41/* Find a good place to play. */
42static char *
43find_play_pen(char *pen, off_t sz)
44{
45 char *cp;
46 struct stat sb;
47 char humbuf[6];
48
49 if (pen[0] && isdir(dirname(pen)) == TRUE && (min_free(dirname(pen)) >= sz))
50 return pen;
51 else if ((cp = getenv("PKG_TMPDIR")) != NULL && stat(cp, &sb) != FAIL && (min_free(cp) >= sz))
52 sprintf(pen, "%s/instmp.XXXXXX", cp);
53 else if ((cp = getenv("TMPDIR")) != NULL && stat(cp, &sb) != FAIL && (min_free(cp) >= sz))
54 sprintf(pen, "%s/instmp.XXXXXX", cp);
55 else if (stat("/var/tmp", &sb) != FAIL && min_free("/var/tmp") >= sz)
56 strcpy(pen, "/var/tmp/instmp.XXXXXX");
57 else if (stat("/tmp", &sb) != FAIL && min_free("/tmp") >= sz)
58 strcpy(pen, "/tmp/instmp.XXXXXX");
59 else if ((stat("/usr/tmp", &sb) == SUCCESS || mkdir("/usr/tmp", 01777) == SUCCESS) && min_free("/usr/tmp") >= sz)
60 strcpy(pen, "/usr/tmp/instmp.XXXXXX");
61 else {
62 cleanup(0);
63 humanize_number(humbuf, sizeof humbuf, sz, "", HN_AUTOSCALE,
64 HN_NOSPACE);
65 errx(2,
66"%s: can't find enough temporary space to extract the files, please set your\n"
67"PKG_TMPDIR environment variable to a location with at least %s bytes\n"
68"free", __func__, humbuf);
69 return NULL;
70 }
71 return pen;
72}
73
74#define MAX_STACK 20
75static char *pstack[MAX_STACK];
76static int pdepth = -1;
77
78static const char *
79pushPen(const char *pen)
80{
81 if (++pdepth == MAX_STACK)
82 errx(2, "%s: stack overflow.\n", __func__);
83 pstack[pdepth] = strdup(pen);
84
85 return pstack[pdepth];
86}
87
88static void
89popPen(char *pen)
90{
91 if (pdepth == -1) {
92 pen[0] = '\0';
93 return;
94 }
95 strcpy(pen, pstack[pdepth]);
96 free(pstack[pdepth--]);
97}
98
99/*
100 * Make a temporary directory to play in and chdir() to it, returning
101 * pathname of previous working directory.
102 */
103const char *
104make_playpen(char *pen, off_t sz)
105{
106 char humbuf1[6], humbuf2[6];
107 char cwd[FILENAME_MAX];
108
109 if (!find_play_pen(pen, sz))
110 return NULL;
111
112 if (!mkdtemp(pen)) {
113 cleanup(0);
114 errx(2, "%s: can't mktemp '%s'", __func__, pen);
115 }
|
116 if (chmod(pen, 0700) == FAIL) {
117 cleanup(0);
118 errx(2, "%s: can't mkdir '%s'", __func__, pen);
119 }
| |
120
121 if (Verbose) {
122 if (sz) {
123 humanize_number(humbuf1, sizeof humbuf1, sz, "", HN_AUTOSCALE,
124 HN_NOSPACE);
125 humanize_number(humbuf2, sizeof humbuf2, min_free(pen),
126 "", HN_AUTOSCALE, HN_NOSPACE);
127 fprintf(stderr, "Requested space: %s bytes, free space: %s bytes in %s\n", humbuf1, humbuf2, pen);
128 }
129 }
130
131 if (min_free(pen) < sz) {
132 rmdir(pen);
133 cleanup(0);
134 errx(2, "%s: not enough free space to create '%s'.\n"
135 "Please set your PKG_TMPDIR environment variable to a location\n"
136 "with more space and\ntry the command again", __func__, pen);
137 }
138
139 if (!getcwd(cwd, FILENAME_MAX)) {
140 upchuck("getcwd");
141 return NULL;
142 }
143
144 if (chdir(pen) == FAIL) {
145 cleanup(0);
146 errx(2, "%s: can't chdir to '%s'", __func__, pen);
147 }
148
149 strcpy(PenLocation, pen);
150 return pushPen(cwd);
151}
152
153/* Convenience routine for getting out of playpen */
154int
155leave_playpen()
156{
157 static char left[FILENAME_MAX];
158 void (*oldsig)(int);
159
160 if (!PenLocation[0])
161 return 0;
162
163 /* Don't interrupt while we're cleaning up */
164 oldsig = signal(SIGINT, SIG_IGN);
165 strcpy(left, PenLocation);
166 popPen(PenLocation);
167
168 if (chdir(PenLocation) == FAIL) {
169 cleanup(0);
170 errx(2, "%s: can't chdir back to '%s'", __func__, PenLocation);
171 }
172
173 if (left[0] == '/' && vsystem("/bin/rm -rf %s", left))
174 warnx("couldn't remove temporary dir '%s'", left);
175 signal(SIGINT, oldsig);
176
177 return 1;
178}
179
180off_t
181min_free(const char *tmpdir)
182{
183 struct statfs buf;
184
185 if (statfs(tmpdir, &buf) != 0) {
186 warn("statfs");
187 return -1;
188 }
189 return (off_t)buf.f_bavail * (off_t)buf.f_bsize;
190}
| 116
117 if (Verbose) {
118 if (sz) {
119 humanize_number(humbuf1, sizeof humbuf1, sz, "", HN_AUTOSCALE,
120 HN_NOSPACE);
121 humanize_number(humbuf2, sizeof humbuf2, min_free(pen),
122 "", HN_AUTOSCALE, HN_NOSPACE);
123 fprintf(stderr, "Requested space: %s bytes, free space: %s bytes in %s\n", humbuf1, humbuf2, pen);
124 }
125 }
126
127 if (min_free(pen) < sz) {
128 rmdir(pen);
129 cleanup(0);
130 errx(2, "%s: not enough free space to create '%s'.\n"
131 "Please set your PKG_TMPDIR environment variable to a location\n"
132 "with more space and\ntry the command again", __func__, pen);
133 }
134
135 if (!getcwd(cwd, FILENAME_MAX)) {
136 upchuck("getcwd");
137 return NULL;
138 }
139
140 if (chdir(pen) == FAIL) {
141 cleanup(0);
142 errx(2, "%s: can't chdir to '%s'", __func__, pen);
143 }
144
145 strcpy(PenLocation, pen);
146 return pushPen(cwd);
147}
148
149/* Convenience routine for getting out of playpen */
150int
151leave_playpen()
152{
153 static char left[FILENAME_MAX];
154 void (*oldsig)(int);
155
156 if (!PenLocation[0])
157 return 0;
158
159 /* Don't interrupt while we're cleaning up */
160 oldsig = signal(SIGINT, SIG_IGN);
161 strcpy(left, PenLocation);
162 popPen(PenLocation);
163
164 if (chdir(PenLocation) == FAIL) {
165 cleanup(0);
166 errx(2, "%s: can't chdir back to '%s'", __func__, PenLocation);
167 }
168
169 if (left[0] == '/' && vsystem("/bin/rm -rf %s", left))
170 warnx("couldn't remove temporary dir '%s'", left);
171 signal(SIGINT, oldsig);
172
173 return 1;
174}
175
176off_t
177min_free(const char *tmpdir)
178{
179 struct statfs buf;
180
181 if (statfs(tmpdir, &buf) != 0) {
182 warn("statfs");
183 return -1;
184 }
185 return (off_t)buf.f_bavail * (off_t)buf.f_bsize;
186}
|