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lxcmntent: coding rules
Signed-off-by: 2xsec <dh48.jeong@samsung.com>
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2xsec
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@ -1,126 +1,127 @@
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/* Utilities for reading/writing fstab, mtab, etc.
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Copyright (C) 1995-2000, 2001, 2002, 2003, 2006
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Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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* Copyright (C) 1995-2000, 2001, 2002, 2003, 2006
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* Free Software Foundation, Inc.
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* This file is part of the GNU C Library.
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*
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* The GNU C Library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* The GNU C Library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef _GNU_SOURCE
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#define _GNU_SOURCE 1
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#endif
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#include <alloca.h>
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#include <macro.h>
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#include <mntent.h>
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#include <stdio.h>
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#include <string.h>
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#include <mntent.h>
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/* Since the values in a line are separated by spaces, a name cannot
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contain a space. Therefore some programs encode spaces in names
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by the strings "\040". We undo the encoding when reading an entry.
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The decoding happens in place. */
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static char *
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decode_name (char *buf)
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* contain a space. Therefore some programs encode spaces in names
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* by the strings "\040". We undo the encoding when reading an entry.
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* The decoding happens in place.
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*/
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static char *decode_name(char *buf)
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{
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char *rp = buf;
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char *wp = buf;
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do
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if (rp[0] == '\\' && rp[1] == '0' && rp[2] == '4' && rp[3] == '0')
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{
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do {
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if (rp[0] == '\\' && rp[1] == '0' && rp[2] == '4' &&
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rp[3] == '0') {
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/* \040 is a SPACE. */
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*wp++ = ' ';
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rp += 3;
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}
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else if (rp[0] == '\\' && rp[1] == '0' && rp[2] == '1' && rp[3] == '1')
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{
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} else if (rp[0] == '\\' && rp[1] == '0' && rp[2] == '1' &&
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rp[3] == '1') {
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/* \011 is a TAB. */
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*wp++ = '\t';
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rp += 3;
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}
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else if (rp[0] == '\\' && rp[1] == '0' && rp[2] == '1' && rp[3] == '2')
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{
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} else if (rp[0] == '\\' && rp[1] == '0' && rp[2] == '1' &&
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rp[3] == '2') {
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/* \012 is a NEWLINE. */
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*wp++ = '\n';
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rp += 3;
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}
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else if (rp[0] == '\\' && rp[1] == '\\')
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{
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} else if (rp[0] == '\\' && rp[1] == '\\') {
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/* We have to escape \\ to be able to represent all characters. */
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*wp++ = '\\';
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rp += 1;
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}
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else if (rp[0] == '\\' && rp[1] == '1' && rp[2] == '3' && rp[3] == '4')
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{
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} else if (rp[0] == '\\' && rp[1] == '1' && rp[2] == '3' &&
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rp[3] == '4') {
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/* \134 is also \\. */
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*wp++ = '\\';
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rp += 3;
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}
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else
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} else {
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*wp++ = *rp;
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while (*rp++ != '\0');
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}
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} while (*rp++ != '\0');
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return buf;
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}
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/* Read one mount table entry from STREAM. Returns a pointer to storage
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reused on the next call, or null for EOF or error (use feof/ferror to
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check). */
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struct mntent *getmntent_r (FILE *stream, struct mntent *mp, char *buffer, int bufsiz)
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* reused on the next call, or null for EOF or error (use feof/ferror to check).
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*/
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struct mntent *getmntent_r(FILE *stream, struct mntent *mp, char *buffer, int bufsiz)
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{
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char *cp;
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char *head;
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do
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{
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do {
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char *end_ptr;
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if (fgets (buffer, bufsiz, stream) == NULL)
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{
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if (!fgets(buffer, bufsiz, stream))
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return NULL;
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}
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end_ptr = strchr (buffer, '\n');
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if (end_ptr != NULL) /* chop newline */
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end_ptr = strchr(buffer, '\n');
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if (end_ptr != NULL) {
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/* chop newline */
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*end_ptr = '\0';
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else
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{
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} else {
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/* Not the whole line was read. Do it now but forget it. */
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char tmp[1024];
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while (fgets (tmp, sizeof tmp, stream) != NULL)
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if (strchr (tmp, '\n') != NULL)
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char tmp[1024] = {0};
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while (fgets(tmp, sizeof tmp, stream))
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if (strchr(tmp, '\n') != NULL)
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break;
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}
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head = buffer + strspn (buffer, " \t");
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head = buffer + strspn(buffer, " \t");
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/* skip empty lines and comment lines: */
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}
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while (head[0] == '\0' || head[0] == '#');
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} while (head[0] == '\0' || head[0] == '#');
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cp = strsep (&head, " \t");
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mp->mnt_fsname = cp != NULL ? decode_name (cp) : (char *) "";
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cp = strsep(&head, " \t");
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mp->mnt_fsname = cp ? decode_name(cp) : (char *)"";
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if (head)
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head += strspn (head, " \t");
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cp = strsep (&head, " \t");
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mp->mnt_dir = cp != NULL ? decode_name (cp) : (char *) "";
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head += strspn(head, " \t");
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cp = strsep(&head, " \t");
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mp->mnt_dir = cp ? decode_name(cp) : (char *)"";
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if (head)
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head += strspn (head, " \t");
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cp = strsep (&head, " \t");
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mp->mnt_type = cp != NULL ? decode_name (cp) : (char *) "";
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head += strspn(head, " \t");
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cp = strsep(&head, " \t");
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mp->mnt_type = cp ? decode_name(cp) : (char *)"";
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if (head)
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head += strspn (head, " \t");
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cp = strsep (&head, " \t");
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mp->mnt_opts = cp != NULL ? decode_name (cp) : (char *) "";
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switch (head ? sscanf (head, " %d %d ", &mp->mnt_freq, &mp->mnt_passno) : 0)
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{
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head += strspn(head, " \t");
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cp = strsep(&head, " \t");
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mp->mnt_opts = cp ? decode_name(cp) : (char *)"";
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if (head) {
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int ret = sscanf(head, " %d %d ", &mp->mnt_freq, &mp->mnt_passno);
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switch (ret) {
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case 0:
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mp->mnt_freq = 0;
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case 1:
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@ -128,68 +129,74 @@ struct mntent *getmntent_r (FILE *stream, struct mntent *mp, char *buffer, int b
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case 2:
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break;
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}
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} else {
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mp->mnt_freq = 0;
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}
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return mp;
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}
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struct mntent *getmntent (FILE *stream)
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struct mntent *getmntent(FILE *stream)
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{
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static struct mntent m;
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static char *getmntent_buffer;
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#define BUFFER_SIZE 4096
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if (getmntent_buffer == NULL) {
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getmntent_buffer = (char *) malloc (BUFFER_SIZE);
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if (!getmntent_buffer) {
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getmntent_buffer = (char *)malloc(LXC_MAX_BUFFER);
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if (!getmntent_buffer)
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return NULL;
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}
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return getmntent_r (stream, &m, getmntent_buffer, BUFFER_SIZE);
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#undef BUFFER_SIZE
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return getmntent_r(stream, &m, getmntent_buffer, LXC_MAX_BUFFER);
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}
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/* Prepare to begin reading and/or writing mount table entries from the
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beginning of FILE. MODE is as for `fopen'. */
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FILE *setmntent (const char *file, const char *mode)
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* beginning of FILE. MODE is as for `fopen'.
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*/
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FILE *setmntent(const char *file, const char *mode)
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{
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/* Extend the mode parameter with "c" to disable cancellation in the
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I/O functions and "e" to set FD_CLOEXEC. */
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size_t modelen = strlen (mode);
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* I/O functions and "e" to set FD_CLOEXEC.
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*/
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size_t modelen = strlen(mode);
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char *newmode;
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newmode = alloca(modelen + 3);
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memcpy (newmode, mode, modelen);
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memcpy (newmode + modelen, "ce", 3);
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FILE *result = fopen (file, newmode);
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memcpy(newmode, mode, modelen);
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memcpy(newmode + modelen, "ce", 3);
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return result;
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return fopen (file, newmode);
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}
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/* Close a stream opened with `setmntent'. */
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int endmntent (FILE *stream)
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int endmntent(FILE *stream)
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{
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if (stream) /* SunOS 4.x allows for NULL stream */
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fclose (stream);
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return 1; /* SunOS 4.x says to always return 1 */
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/* SunOS 4.x allows for NULL stream */
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if (stream)
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fclose(stream);
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/* SunOS 4.x says to always return 1 */
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return 1;
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}
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/* Search MNT->mnt_opts for an option matching OPT.
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Returns the address of the substring, or null if none found. */
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char *hasmntopt (const struct mntent *mnt, const char *opt)
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* Returns the address of the substring, or null if none found.
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*/
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char *hasmntopt(const struct mntent *mnt, const char *opt)
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{
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const size_t optlen = strlen (opt);
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const size_t optlen = strlen(opt);
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char *rest = mnt->mnt_opts, *p;
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while ((p = strstr (rest, opt)) != NULL)
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{
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if ((p == rest || p[-1] == ',')
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&& (p[optlen] == '\0' || p[optlen] == '=' || p[optlen] == ','))
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while ((p = strstr(rest, opt))) {
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if ((p == rest || p[-1] == ',') &&
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(p[optlen] == '\0' || p[optlen] == '=' || p[optlen] == ','))
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return p;
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rest = strchr (p, ',');
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if (rest == NULL)
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rest = strchr(p, ',');
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if (!rest)
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break;
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++rest;
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}
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