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fopen-safer.c

Absolute File Name:/home/opencoverage/opencoverage/guest-scripts/coreutils/src/gnulib/lib/fopen-safer.c
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1/* Invoke fopen, but avoid some glitches.-
2-
3 Copyright (C) 2001, 2004-2006, 2009-2018 Free Software Foundation, Inc.-
4-
5 This program is free software: you can redistribute it and/or modify-
6 it under the terms of the GNU General Public License as published by-
7 the Free Software Foundation; either version 3 of the License, or-
8 (at your option) any later version.-
9-
10 This program is distributed in the hope that it will be useful,-
11 but WITHOUT ANY WARRANTY; without even the implied warranty of-
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the-
13 GNU General Public License for more details.-
14-
15 You should have received a copy of the GNU General Public License-
16 along with this program. If not, see <https://www.gnu.org/licenses/>. */-
17-
18/* Written by Paul Eggert. */-
19-
20#include <config.h>-
21-
22#include "stdio-safer.h"-
23-
24#include <errno.h>-
25#include <unistd.h>-
26#include "unistd-safer.h"-
27-
28/* Like fopen, but do not return stdin, stdout, or stderr. */-
29-
30FILE *-
31fopen_safer (char const *file, char const *mode)-
32{-
33 FILE *fp = fopen (file, mode);-
34-
35 if (fp)
fpDescription
TRUEevaluated 3586 times by 14 tests
Evaluated by:
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FALSEevaluated 8 times by 2 tests
Evaluated by:
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8-3586
36 {-
37 int fd = fileno (fp);-
38-
39 if (0 <= fd && fd <= STDERR_FILENO)
0 <= fdDescription
TRUEevaluated 3586 times by 14 tests
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FALSEnever evaluated
fd <= 2Description
TRUEnever evaluated
FALSEevaluated 3586 times by 14 tests
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0-3586
40 {-
41 int f = dup_safer (fd);-
42-
43 if (f < 0)
f < 0Description
TRUEnever evaluated
FALSEnever evaluated
0
44 {-
45 int e = errno;-
46 fclose (fp);-
47 errno = e;-
48 return NULL;
never executed: return ((void *)0) ;
0
49 }-
50-
51 if (fclose (fp) != 0
rpl_fclose (fp) != 0Description
TRUEnever evaluated
FALSEnever evaluated
0
52 || ! (fp = fdopen (f, mode)))
! (fp = fdopen (f, mode))Description
TRUEnever evaluated
FALSEnever evaluated
0
53 {-
54 int e = errno;-
55 close (f);-
56 errno = e;-
57 return NULL;
never executed: return ((void *)0) ;
0
58 }-
59 }
never executed: end of block
0
60 }
executed 3586 times by 14 tests: end of block
Executed by:
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3586
61-
62 return fp;
executed 3594 times by 14 tests: return fp;
Executed by:
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3594
63}-
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