5da8388fc6
The intention of the code is just to not report an error message when 'typefile' doesn't exist. If we call access(2) and then fopen(2), there's a race. It's not a huge problem, and the worst thing that can happen is reporting an error when the file has been removed after access(2). It's not a problem, but we can fix the race and at the same time clarify the intention of not warning about ENOENT and also remove one syscall. Seems like a win-win. Suggested-by: Christian Göttsche <cgzones@googlemail.com> Signed-off-by: Alejandro Colomar <alx@kernel.org>
66 lines
1.2 KiB
C
66 lines
1.2 KiB
C
/*
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* SPDX-FileCopyrightText: 1989 - 1994, Julianne Frances Haugh
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* SPDX-FileCopyrightText: 1996 - 1997, Marek Michałkiewicz
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* SPDX-FileCopyrightText: 2003 - 2005, Tomasz Kłoczko
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* SPDX-FileCopyrightText: 2008 - 2010, Nicolas François
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#include <config.h>
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#ident "$Id$"
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#include <stdio.h>
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#include "prototypes.h"
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#include "defines.h"
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#include "getdef.h"
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/*
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* ttytype - set ttytype from port to terminal type mapping database
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*/
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void ttytype (const char *line)
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{
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FILE *fp;
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char buf[BUFSIZ];
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const char *typefile;
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char *cp;
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char type[1024] = "";
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char port[1024];
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if (getenv ("TERM") != NULL) {
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return;
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}
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typefile = getdef_str ("TTYTYPE_FILE");
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if (NULL == typefile) {
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return;
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}
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fp = fopen (typefile, "r");
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if (NULL == fp) {
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if (errno != ENOENT)
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perror (typefile);
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return;
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}
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while (fgets (buf, sizeof buf, fp) == buf) {
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if (buf[0] == '#') {
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continue;
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}
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cp = strchr (buf, '\n');
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if (NULL != cp) {
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*cp = '\0';
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}
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if ( (sscanf (buf, "%1023s %1023s", type, port) == 2)
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&& (strcmp (line, port) == 0)) {
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break;
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}
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}
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if ((feof (fp) == 0) && (ferror (fp) == 0) && (type[0] != '\0')) {
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addenv ("TERM", type);
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}
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(void) fclose (fp);
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}
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