| Absolute File Name: | /home/opencoverage/opencoverage/guest-scripts/coreutils/src/gnulib/lib/fd-safer-flag.c |
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| 1 | /* Adjust a file descriptor result so that it avoids clobbering | - | ||||||||||||
| 2 | STD{IN,OUT,ERR}_FILENO, with specific flags. | - | ||||||||||||
| 3 | - | |||||||||||||
| 4 | Copyright (C) 2005-2006, 2009-2018 Free Software Foundation, Inc. | - | ||||||||||||
| 5 | - | |||||||||||||
| 6 | This program is free software: you can redistribute it and/or modify | - | ||||||||||||
| 7 | it under the terms of the GNU General Public License as published by | - | ||||||||||||
| 8 | the Free Software Foundation; either version 3 of the License, or | - | ||||||||||||
| 9 | (at your option) any later version. | - | ||||||||||||
| 10 | - | |||||||||||||
| 11 | This program is distributed in the hope that it will be useful, | - | ||||||||||||
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | - | ||||||||||||
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | - | ||||||||||||
| 14 | GNU General Public License for more details. | - | ||||||||||||
| 15 | - | |||||||||||||
| 16 | You should have received a copy of the GNU General Public License | - | ||||||||||||
| 17 | along with this program. If not, see <https://www.gnu.org/licenses/>. */ | - | ||||||||||||
| 18 | - | |||||||||||||
| 19 | /* Written by Paul Eggert and Eric Blake. */ | - | ||||||||||||
| 20 | - | |||||||||||||
| 21 | #include <config.h> | - | ||||||||||||
| 22 | - | |||||||||||||
| 23 | /* Specification. */ | - | ||||||||||||
| 24 | #include "unistd-safer.h" | - | ||||||||||||
| 25 | - | |||||||||||||
| 26 | #include <errno.h> | - | ||||||||||||
| 27 | #include <unistd.h> | - | ||||||||||||
| 28 | - | |||||||||||||
| 29 | /* Return FD, unless FD would be a copy of standard input, output, or | - | ||||||||||||
| 30 | error; in that case, return a duplicate of FD, closing FD. If FLAG | - | ||||||||||||
| 31 | contains O_CLOEXEC, the returned FD will have close-on-exec | - | ||||||||||||
| 32 | semantics. On failure to duplicate, close FD, set errno, and | - | ||||||||||||
| 33 | return -1. Preserve errno if FD is negative, so that the caller | - | ||||||||||||
| 34 | can always inspect errno when the returned value is negative. | - | ||||||||||||
| 35 | - | |||||||||||||
| 36 | This function is usefully wrapped around functions that return file | - | ||||||||||||
| 37 | descriptors, e.g., fd_safer_flag (open ("file", O_RDONLY | flag), flag). */ | - | ||||||||||||
| 38 | - | |||||||||||||
| 39 | int | - | ||||||||||||
| 40 | fd_safer_flag (int fd, int flag) | - | ||||||||||||
| 41 | { | - | ||||||||||||
| 42 | if (STDIN_FILENO <= fd && fd <= STDERR_FILENO)
| 0-2378 | ||||||||||||
| 43 | { | - | ||||||||||||
| 44 | int f = dup_safer_flag (fd, flag); | - | ||||||||||||
| 45 | int e = errno; | - | ||||||||||||
| 46 | close (fd); | - | ||||||||||||
| 47 | errno = e; | - | ||||||||||||
| 48 | fd = f; | - | ||||||||||||
| 49 | } never executed: end of block | 0 | ||||||||||||
| 50 | - | |||||||||||||
| 51 | return fd; executed 2379 times by 1 test: return fd;Executed by:
| 2379 | ||||||||||||
| 52 | } | - | ||||||||||||
| Source code | Switch to Preprocessed file |