OpenCoverage

sync.c

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1/* sync - update the super block-
2 Copyright (C) 1994-2018 Free Software Foundation, Inc.-
3-
4 This program is free software: you can redistribute it and/or modify-
5 it under the terms of the GNU General Public License as published by-
6 the Free Software Foundation, either version 3 of the License, or-
7 (at your option) any later version.-
8-
9 This program is distributed in the hope that it will be useful,-
10 but WITHOUT ANY WARRANTY; without even the implied warranty of-
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the-
12 GNU General Public License for more details.-
13-
14 You should have received a copy of the GNU General Public License-
15 along with this program. If not, see <https://www.gnu.org/licenses/>. */-
16-
17/* Written by Jim Meyering */-
18-
19#include <config.h>-
20#include <assert.h>-
21#include <getopt.h>-
22#include <stdio.h>-
23#include <sys/types.h>-
24-
25#include "system.h"-
26#include "die.h"-
27#include "error.h"-
28-
29/* The official name of this program (e.g., no 'g' prefix). */-
30#define PROGRAM_NAME "sync"-
31-
32#define AUTHORS \-
33 proper_name ("Jim Meyering"), \-
34 proper_name ("Giuseppe Scrivano")-
35-
36#ifndef HAVE_SYNCFS-
37# define HAVE_SYNCFS 0-
38#endif-
39-
40enum sync_mode-
41{-
42 MODE_FILE,-
43 MODE_DATA,-
44 MODE_FILE_SYSTEM,-
45 MODE_SYNC-
46};-
47-
48static struct option const long_options[] =-
49{-
50 {"data", no_argument, NULL, 'd'},-
51 {"file-system", no_argument, NULL, 'f'},-
52 {GETOPT_HELP_OPTION_DECL},-
53 {GETOPT_VERSION_OPTION_DECL},-
54 {NULL, 0, NULL, 0}-
55};-
56-
57void-
58usage (int status)-
59{-
60 if (status != EXIT_SUCCESS)
status != 0Description
TRUEevaluated 3 times by 1 test
Evaluated by:
  • sync
FALSEevaluated 7 times by 1 test
Evaluated by:
  • sync
3-7
61 emit_try_help ();
executed 3 times by 1 test: end of block
Executed by:
  • sync
3
62 else-
63 {-
64 printf (_("Usage: %s [OPTION] [FILE]...\n"), program_name);-
65 fputs (_("\-
66Synchronize cached writes to persistent storage\n\-
67\n\-
68If one or more files are specified, sync only them,\n\-
69or their containing file systems.\n\-
70\n\-
71"), stdout);-
72-
73 fputs (_("\-
74 -d, --data sync only file data, no unneeded metadata\n\-
75"), stdout);-
76 fputs (_("\-
77 -f, --file-system sync the file systems that contain the files\n\-
78"), stdout);-
79-
80 fputs (HELP_OPTION_DESCRIPTION, stdout);-
81 fputs (VERSION_OPTION_DESCRIPTION, stdout);-
82 emit_ancillary_info (PROGRAM_NAME);-
83 }
executed 7 times by 1 test: end of block
Executed by:
  • sync
7
84 exit (status);
executed 10 times by 1 test: exit (status);
Executed by:
  • sync
10
85}-
86-
87/* Sync the specified FILE, or file systems associated with FILE.-
88 Return 1 on success. */-
89-
90static bool-
91sync_arg (enum sync_mode mode, char const *file)-
92{-
93 bool ret = true;-
94 int open_flags = O_RDONLY | O_NONBLOCK;-
95 int fd;-
96-
97#ifdef _AIX-
98 /* AIX 7.1 fsync requires write access to file. */-
99 if (mode == MODE_FILE)-
100 open_flags = O_WRONLY | O_NONBLOCK;-
101#endif-
102-
103 /* Note O_PATH might be supported with syncfs(),-
104 though as of Linux 3.18 is not. */-
105 fd = open (file, open_flags);-
106 if (fd < 0)
fd < 0Description
TRUEevaluated 2 times by 1 test
Evaluated by:
  • sync
FALSEevaluated 4 times by 1 test
Evaluated by:
  • sync
2-4
107 {-
108 /* Use the O_RDONLY errno, which is significant-
109 with directories for example. */-
110 int rd_errno = errno;-
111 if (open_flags != (O_WRONLY | O_NONBLOCK))
open_flags != ( 01 | 04000 )Description
TRUEevaluated 2 times by 1 test
Evaluated by:
  • sync
FALSEnever evaluated
0-2
112 fd = open (file, O_WRONLY | O_NONBLOCK);
executed 2 times by 1 test: fd = open (file, 01 | 04000 );
Executed by:
  • sync
2
113 if (fd < 0)
fd < 0Description
TRUEevaluated 2 times by 1 test
Evaluated by:
  • sync
FALSEnever evaluated
0-2
114 error (0, rd_errno, _("error opening %s"), quoteaf (file));
executed 2 times by 1 test: error (0, rd_errno, dcgettext (((void *)0), "error opening %s" , 5) , quotearg_style (shell_escape_always_quoting_style, file));
Executed by:
  • sync
2
115 return false;
executed 2 times by 1 test: return 0 ;
Executed by:
  • sync
2
116 }-
117-
118 /* We used O_NONBLOCK above to not hang with fifos,-
119 so reset that here. */-
120 int fdflags = fcntl (fd, F_GETFL);-
121 if (fdflags == -1
fdflags == -1Description
TRUEnever evaluated
FALSEevaluated 4 times by 1 test
Evaluated by:
  • sync
0-4
122 || fcntl (fd, F_SETFL, fdflags & ~O_NONBLOCK) < 0)
rpl_fcntl (fd,... ~ 04000 ) < 0Description
TRUEnever evaluated
FALSEevaluated 4 times by 1 test
Evaluated by:
  • sync
0-4
123 {-
124 error (0, errno, _("couldn't reset non-blocking mode %s"),-
125 quoteaf (file));-
126 ret = false;-
127 }
never executed: end of block
0
128-
129 if (ret == true)
ret == 1Description
TRUEevaluated 4 times by 1 test
Evaluated by:
  • sync
FALSEnever evaluated
0-4
130 {-
131 int sync_status = -1;-
132-
133 switch (mode)-
134 {-
135 case MODE_DATA:
never executed: case MODE_DATA:
0
136 sync_status = fdatasync (fd);-
137 break;
never executed: break;
0
138-
139 case MODE_FILE:
executed 4 times by 1 test: case MODE_FILE:
Executed by:
  • sync
4
140 sync_status = fsync (fd);-
141 break;
executed 4 times by 1 test: break;
Executed by:
  • sync
4
142-
143#if HAVE_SYNCFS-
144 case MODE_FILE_SYSTEM:
never executed: case MODE_FILE_SYSTEM:
0
145 sync_status = syncfs (fd);-
146 break;
never executed: break;
0
147#endif-
148-
149 default:
never executed: default:
0
150 assert ("invalid sync_mode");-
151 }
never executed: end of block
0
152-
153 if (sync_status < 0)
sync_status < 0Description
TRUEevaluated 1 time by 1 test
Evaluated by:
  • sync
FALSEevaluated 3 times by 1 test
Evaluated by:
  • sync
1-3
154 {-
155 error (0, errno, _("error syncing %s"), quoteaf (file));-
156 ret = false;-
157 }
executed 1 time by 1 test: end of block
Executed by:
  • sync
1
158 }
executed 4 times by 1 test: end of block
Executed by:
  • sync
4
159-
160 if (close (fd) < 0)
close (fd) < 0Description
TRUEnever evaluated
FALSEevaluated 4 times by 1 test
Evaluated by:
  • sync
0-4
161 {-
162 error (0, errno, _("failed to close %s"), quoteaf (file));-
163 ret = false;-
164 }
never executed: end of block
0
165-
166 return ret;
executed 4 times by 1 test: return ret;
Executed by:
  • sync
4
167}-
168-
169int-
170main (int argc, char **argv)-
171{-
172 int c;-
173 bool args_specified;-
174 bool arg_data = false, arg_file_system = false;-
175 enum sync_mode mode;-
176 bool ok = true;-
177-
178 initialize_main (&argc, &argv);-
179 set_program_name (argv[0]);-
180 setlocale (LC_ALL, "");-
181 bindtextdomain (PACKAGE, LOCALEDIR);-
182 textdomain (PACKAGE);-
183-
184 atexit (close_stdout);-
185-
186 while ((c = getopt_long (argc, argv, "df", long_options, NULL))
(c = getopt_lo... *)0) )) != -1Description
TRUEevaluated 22 times by 1 test
Evaluated by:
  • sync
FALSEevaluated 7 times by 1 test
Evaluated by:
  • sync
7-22
187 != -1)
(c = getopt_lo... *)0) )) != -1Description
TRUEevaluated 22 times by 1 test
Evaluated by:
  • sync
FALSEevaluated 7 times by 1 test
Evaluated by:
  • sync
7-22
188 {-
189 switch (c)-
190 {-
191 case 'd':
executed 4 times by 1 test: case 'd':
Executed by:
  • sync
4
192 arg_data = true;-
193 break;
executed 4 times by 1 test: break;
Executed by:
  • sync
4
194-
195 case 'f':
executed 3 times by 1 test: case 'f':
Executed by:
  • sync
3
196 arg_file_system = true;-
197 break;
executed 3 times by 1 test: break;
Executed by:
  • sync
3
198-
199 case_GETOPT_HELP_CHAR;
never executed: break;
executed 7 times by 1 test: case GETOPT_HELP_CHAR:
Executed by:
  • sync
0-7
200-
201 case_GETOPT_VERSION_CHAR (PROGRAM_NAME, AUTHORS);
executed 5 times by 1 test: exit ( 0 );
Executed by:
  • sync
never executed: break;
executed 5 times by 1 test: case GETOPT_VERSION_CHAR:
Executed by:
  • sync
0-5
202-
203 default:
executed 3 times by 1 test: default:
Executed by:
  • sync
3
204 usage (EXIT_FAILURE);-
205 }
never executed: end of block
0
206 }-
207-
208 args_specified = optind < argc;-
209-
210 if (arg_data && arg_file_system)
arg_dataDescription
TRUEevaluated 2 times by 1 test
Evaluated by:
  • sync
FALSEevaluated 5 times by 1 test
Evaluated by:
  • sync
arg_file_systemDescription
TRUEevaluated 1 time by 1 test
Evaluated by:
  • sync
FALSEevaluated 1 time by 1 test
Evaluated by:
  • sync
1-5
211 {-
212 die (EXIT_FAILURE, 0,-
213 _("cannot specify both --data and --file-system"));-
214 }
never executed: end of block
0
215-
216 if (!args_specified && arg_data)
!args_specifiedDescription
TRUEevaluated 1 time by 1 test
Evaluated by:
  • sync
FALSEevaluated 5 times by 1 test
Evaluated by:
  • sync
arg_dataDescription
TRUEevaluated 1 time by 1 test
Evaluated by:
  • sync
FALSEnever evaluated
0-5
217 die (EXIT_FAILURE, 0, _("--data needs at least one argument"));
executed 1 time by 1 test: ((!!sizeof (struct { _Static_assert ( 1 , "verify_expr (" "1" ", " "(error (1, 0, dcgettext (((void *)0), \"--data needs at least one argument\", 5)), assume (false))" ")"); int _gl_dummy; })) ? ((error ( 1 , 0, dcgettext (((void *)0), "--data needs at least one argument" , 5) ), (( 0 ) ? (void) 0 : __builtin_unreachable ()))) : ((error ( 1 , 0, dcgettext (((void *)0), "--data needs at least one argument" , 5) ), (( 0 ) ? (void) 0 : __builtin_unreachable ()))));
Executed by:
  • sync
1
218-
219 if (! args_specified || (arg_file_system && ! HAVE_SYNCFS))
! args_specifiedDescription
TRUEnever evaluated
FALSEevaluated 5 times by 1 test
Evaluated by:
  • sync
0-5
220 mode = MODE_SYNC;
never executed: mode = MODE_SYNC;
0
221 else if (arg_file_system)
arg_file_systemDescription
TRUEnever evaluated
FALSEevaluated 5 times by 1 test
Evaluated by:
  • sync
0-5
222 mode = MODE_FILE_SYSTEM;
never executed: mode = MODE_FILE_SYSTEM;
0
223 else if (! arg_data)
! arg_dataDescription
TRUEevaluated 5 times by 1 test
Evaluated by:
  • sync
FALSEnever evaluated
0-5
224 mode = MODE_FILE;
executed 5 times by 1 test: mode = MODE_FILE;
Executed by:
  • sync
5
225 else-
226 mode = MODE_DATA;
never executed: mode = MODE_DATA;
0
227-
228 if (mode == MODE_SYNC)
mode == MODE_SYNCDescription
TRUEnever evaluated
FALSEevaluated 5 times by 1 test
Evaluated by:
  • sync
0-5
229 sync ();
never executed: sync ();
0
230 else-
231 {-
232 for (; optind < argc; optind++)
optind < argcDescription
TRUEevaluated 6 times by 1 test
Evaluated by:
  • sync
FALSEevaluated 5 times by 1 test
Evaluated by:
  • sync
5-6
233 ok &= sync_arg (mode, argv[optind]);
executed 6 times by 1 test: ok &= sync_arg (mode, argv[optind]);
Executed by:
  • sync
6
234 }
executed 5 times by 1 test: end of block
Executed by:
  • sync
5
235-
236 return ok ? EXIT_SUCCESS : EXIT_FAILURE;
executed 5 times by 1 test: return ok ? 0 : 1 ;
Executed by:
  • sync
5
237}-
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