1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
|
/*
* A swapon(8)/swapoff(8) for Linux 0.99.
* swapon.c,v 1.1.1.1 1993/11/18 08:40:51 jrs Exp
* Added '-s' (Summary option) <Vincent.Renardias@waw.com> 02/1997.
*
* 1999-02-22 Arkadiusz Mi¶kiewicz <misiek@pld.ORG.PL>
* - added Native Language Support
* Sun Mar 21 1999 - Arnaldo Carvalho de Melo <acme@conectiva.com.br>
* - fixed strerr(errno) in gettext calls
*
*/
#include <stdlib.h>
#include <stdio.h>
#include <getopt.h>
#include <string.h>
#include <mntent.h>
#include <errno.h>
#include <sys/stat.h>
#include "swap_constants.h"
#include "swapargs.h"
#include "nls.h"
#define streq(s, t) (strcmp ((s), (t)) == 0)
#define _PATH_FSTAB "/etc/fstab"
#define PROC_SWAPS "/proc/swaps"
#define SWAPON_NEEDS_TWO_ARGS
/* Nonzero for chatty (-v). This is a nonstandard flag (not in BSD). */
int verbose = 0;
int priority = -1; /* non-prioritized swap by default */
extern char version[];
static char *program_name;
static struct option longopts[] =
{
{ "all", 0, 0, 'a' },
{ "help", 0, 0, 'h' },
{ "priority", required_argument, 0, 'p' },
{ "summary", 0, 0, 's' },
{ "verbose", 0, 0, 'v' },
{ "version", 0, 0, 'V' },
{ NULL, 0, 0, 0 }
};
static void
usage (FILE *fp, int n)
{
fprintf (fp, _("usage: %s [-hV]\n"
" %s -a [-v]\n"
" %s [-v] [-p priority] special ...\n"
" %s [-s]\n"),
program_name, program_name, program_name, program_name);
exit (n);
}
#ifdef SWAPON_HAS_TWO_ARGS
#define SWAPON_NEEDS_TWO_ARGS
#endif
#ifdef SWAPON_NEEDS_TWO_ARGS
#ifdef SWAPON_HAS_TWO_ARGS
/* libc is OK */
#include <unistd.h>
#else
/* We want a swapon with two args, but have an old libc.
Build the kernel call by hand. */
#include <linux/unistd.h>
static
_syscall2(int, swapon, const char *, path, int, flags);
static
_syscall1(int, swapoff, const char *, path);
#endif
#else
/* just do as libc says */
#include <unistd.h>
#endif
static int
swap (const char *special, int prio)
{
int status;
struct stat st;
if (verbose)
printf(_("%s on %s\n"), program_name, special);
if (streq (program_name, "swapon")) {
if (stat(special, &st) < 0) {
int errsv = errno;
fprintf (stderr, _("swapon: cannot stat %s: %s\n"),
special, strerror (errsv));
return -1;
}
/* people generally dislike this warning - now it is printed
only when `verbose' is set */
if (verbose) {
int permMask = (S_ISBLK(st.st_mode) ? 07007 : 07077);
if ((st.st_mode & permMask) != 0) {
fprintf(stderr,
_("swapon: warning: %s has insecure permissions %04o, "
"%04o suggested\n"),
special, st.st_mode & 07777, ~permMask & 0666);
}
}
/* test for holes by LBT */
if (S_ISREG(st.st_mode)) {
if (st.st_blocks * 512 < st.st_size) {
fprintf(stderr,
_("swapon: Skipping file %s - it appears to have holes.\n"),
special);
return -1;
}
}
#ifdef SWAPON_NEEDS_TWO_ARGS
{
int flags = 0;
#ifdef SWAP_FLAG_PREFER
if (prio >= 0) {
if (prio > SWAP_FLAG_PRIO_MASK)
prio = SWAP_FLAG_PRIO_MASK;
flags = SWAP_FLAG_PREFER
| ((prio & SWAP_FLAG_PRIO_MASK) << SWAP_FLAG_PRIO_SHIFT);
}
#endif
status = swapon (special, flags);
}
#else
status = swapon (special);
#endif
} else
status = swapoff (special);
if (status < 0) {
int errsv = errno;
fprintf (stderr, "%s: %s: %s\n", program_name, special, strerror (errsv));
}
return status;
}
static int
display_summary(void)
{
FILE *swaps;
char line[200] ;
if ((swaps = fopen(PROC_SWAPS, "r")) == NULL) {
int errsv = errno;
fprintf (stderr, "%s: %s: %s\n", program_name, PROC_SWAPS,
strerror (errsv));
return -1 ;
}
while ( fgets(line, sizeof(line), swaps))
printf ("%s", line);
return 0 ;
}
int
main (int argc, char *argv[])
{
struct mntent *fstab;
int status;
int all = 0;
int c;
setlocale(LC_ALL, "");
bindtextdomain(PACKAGE, LOCALEDIR);
textdomain(PACKAGE);
if (strrchr (argv[0], '/') != NULL)
program_name = strrchr (argv[0], '/') + 1;
else
program_name = argv[0];
while ((c = getopt_long (argc, argv, "ahp:svV", longopts, NULL)) != EOF)
switch (c)
{
case 'a': /* all */
++all;
break;
case 'h': /* help */
usage (stdout, 0);
break;
case 'p': /* priority */
priority = atoi(optarg);
break;
case 's': /* tell about current use of swap areas */
status = display_summary();
exit(status);
case 'v': /* be chatty */
++verbose;
break;
case 'V': /* version */
printf ("%s: %s\n", program_name, version);
exit (0);
case 0:
break;
case '?':
default:
usage (stderr, 1);
}
argv += optind;
status = 0;
if (all) {
FILE *fp = setmntent(_PATH_FSTAB, "r");
if (fp == NULL) {
int errsv = errno;
fprintf(stderr, _("%s: cannot open %s: %s\n"), program_name,
_PATH_FSTAB, strerror(errsv));
exit(2);
}
while ((fstab = getmntent(fp)) != NULL) {
if (streq (fstab->mnt_type, MNTTYPE_SWAP)) {
/* parse mount options; */
char *opt, *opts = strdup(fstab->mnt_opts);
for (opt = strtok (opts, ","); opt != NULL;
opt = strtok (NULL, ","))
if (strncmp(opt, "pri=", 4) == 0)
priority = atoi(opt+4);
status |= swap (fstab->mnt_fsname, priority);
}
}
} else if (*argv == NULL) {
usage (stderr, 2);
} else {
while (*argv != NULL)
status |= swap (*argv++,priority);
}
return status;
}
|
