d921b2ecc0
things like xasprintf() into xfuncs.c, remove xprint_file_by_name() (it only had one user), clean up lots of #includes... General cleanup pass. What I've been doing for the last couple days. And it conflicts! I've removed httpd.c from this checkin due to somebody else touching that file. It builds for me. I have to catch a bus. (Now you know why I'm looking forward to Mercurial.)
135 lines
2.5 KiB
C
135 lines
2.5 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* mountopts.c --- convert between default mount options and strings
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*
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* Copyright (C) 2002 Theodore Ts'o <tytso@mit.edu>
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*
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* This file can be redistributed under the terms of the GNU Library General
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* Public License
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*
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <ctype.h>
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#include <errno.h>
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#include "e2p.h"
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struct mntopt {
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unsigned int mask;
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const char *string;
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};
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static const struct mntopt mntopt_list[] = {
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{ EXT2_DEFM_DEBUG, "debug" },
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{ EXT2_DEFM_BSDGROUPS, "bsdgroups" },
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{ EXT2_DEFM_XATTR_USER, "user_xattr" },
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{ EXT2_DEFM_ACL, "acl" },
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{ EXT2_DEFM_UID16, "uid16" },
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{ EXT3_DEFM_JMODE_DATA, "journal_data" },
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{ EXT3_DEFM_JMODE_ORDERED, "journal_data_ordered" },
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{ EXT3_DEFM_JMODE_WBACK, "journal_data_writeback" },
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{ 0, 0 },
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};
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const char *e2p_mntopt2string(unsigned int mask)
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{
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const struct mntopt *f;
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static char buf[20];
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int fnum;
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for (f = mntopt_list; f->string; f++) {
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if (mask == f->mask)
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return f->string;
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}
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for (fnum = 0; mask >>= 1; fnum++);
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sprintf(buf, "MNTOPT_%d", fnum);
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return buf;
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}
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int e2p_string2mntopt(char *string, unsigned int *mask)
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{
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const struct mntopt *f;
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char *eptr;
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int num;
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for (f = mntopt_list; f->string; f++) {
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if (!strcasecmp(string, f->string)) {
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*mask = f->mask;
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return 0;
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}
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}
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if (strncasecmp(string, "MNTOPT_", 8))
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return 1;
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if (string[8] == 0)
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return 1;
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num = strtol(string+8, &eptr, 10);
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if (num > 32 || num < 0)
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return 1;
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if (*eptr)
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return 1;
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*mask = 1 << num;
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return 0;
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}
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static char *skip_over_blanks(char *cp)
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{
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while (*cp && isspace(*cp))
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cp++;
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return cp;
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}
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static char *skip_over_word(char *cp)
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{
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while (*cp && !isspace(*cp) && *cp != ',')
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cp++;
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return cp;
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}
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/*
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* Edit a mntopt set array as requested by the user. The ok
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* parameter, if non-zero, allows the application to limit what
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* mntopts the user is allowed to set or clear using this function.
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*/
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int e2p_edit_mntopts(const char *str, __u32 *mntopts, __u32 ok)
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{
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char *cp, *buf, *next;
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int neg;
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unsigned int mask;
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buf = xstrdup(str);
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cp = buf;
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while (cp && *cp) {
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neg = 0;
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cp = skip_over_blanks(cp);
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next = skip_over_word(cp);
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if (*next == 0)
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next = 0;
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else
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*next = 0;
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switch (*cp) {
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case '-':
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case '^':
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neg++;
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case '+':
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cp++;
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break;
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}
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if (e2p_string2mntopt(cp, &mask))
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return 1;
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if (ok && !(ok & mask))
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return 1;
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if (mask & EXT3_DEFM_JMODE)
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*mntopts &= ~EXT3_DEFM_JMODE;
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if (neg)
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*mntopts &= ~mask;
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else
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*mntopts |= mask;
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cp = next ? next+1 : 0;
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}
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return 0;
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}
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