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author | Denis Vlasenko | 2006-12-26 01:30:59 +0000 |
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committer | Denis Vlasenko | 2006-12-26 01:30:59 +0000 |
commit | c4f623ef2a7980a63de7c9f1d539a656b83f10e7 (patch) | |
tree | a294e28b0112052cb9d58b403554b3390e76f50c /e2fsprogs/old_e2fsprogs/e2p/mntopts.c | |
parent | 64c54025842f205ad722675105b88044a5b6845a (diff) | |
download | busybox-c4f623ef2a7980a63de7c9f1d539a656b83f10e7.zip busybox-c4f623ef2a7980a63de7c9f1d539a656b83f10e7.tar.gz |
put small subset of e2fsprogs back in the tree:
lsattr, chattr, fsck. Old e2fsprogs tree is in
e2fsprogs/old_e2fsprogs/*.
Diffstat (limited to 'e2fsprogs/old_e2fsprogs/e2p/mntopts.c')
-rw-r--r-- | e2fsprogs/old_e2fsprogs/e2p/mntopts.c | 134 |
1 files changed, 134 insertions, 0 deletions
diff --git a/e2fsprogs/old_e2fsprogs/e2p/mntopts.c b/e2fsprogs/old_e2fsprogs/e2p/mntopts.c new file mode 100644 index 0000000..17c26c4 --- /dev/null +++ b/e2fsprogs/old_e2fsprogs/e2p/mntopts.c @@ -0,0 +1,134 @@ +/* vi: set sw=4 ts=4: */ +/* + * mountopts.c --- convert between default mount options and strings + * + * Copyright (C) 2002 Theodore Ts'o <tytso@mit.edu> + * + * This file can be redistributed under the terms of the GNU Library General + * Public License + * + */ + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <ctype.h> +#include <errno.h> + +#include "e2p.h" + +struct mntopt { + unsigned int mask; + const char *string; +}; + +static const struct mntopt mntopt_list[] = { + { EXT2_DEFM_DEBUG, "debug" }, + { EXT2_DEFM_BSDGROUPS, "bsdgroups" }, + { EXT2_DEFM_XATTR_USER, "user_xattr" }, + { EXT2_DEFM_ACL, "acl" }, + { EXT2_DEFM_UID16, "uid16" }, + { EXT3_DEFM_JMODE_DATA, "journal_data" }, + { EXT3_DEFM_JMODE_ORDERED, "journal_data_ordered" }, + { EXT3_DEFM_JMODE_WBACK, "journal_data_writeback" }, + { 0, 0 }, +}; + +const char *e2p_mntopt2string(unsigned int mask) +{ + const struct mntopt *f; + static char buf[20]; + int fnum; + + for (f = mntopt_list; f->string; f++) { + if (mask == f->mask) + return f->string; + } + for (fnum = 0; mask >>= 1; fnum++); + sprintf(buf, "MNTOPT_%d", fnum); + return buf; +} + +int e2p_string2mntopt(char *string, unsigned int *mask) +{ + const struct mntopt *f; + char *eptr; + int num; + + for (f = mntopt_list; f->string; f++) { + if (!strcasecmp(string, f->string)) { + *mask = f->mask; + return 0; + } + } + if (strncasecmp(string, "MNTOPT_", 8)) + return 1; + + if (string[8] == 0) + return 1; + num = strtol(string+8, &eptr, 10); + if (num > 32 || num < 0) + return 1; + if (*eptr) + return 1; + *mask = 1 << num; + return 0; +} + +static char *skip_over_blanks(char *cp) +{ + while (*cp && isspace(*cp)) + cp++; + return cp; +} + +static char *skip_over_word(char *cp) +{ + while (*cp && !isspace(*cp) && *cp != ',') + cp++; + return cp; +} + +/* + * Edit a mntopt set array as requested by the user. The ok + * parameter, if non-zero, allows the application to limit what + * mntopts the user is allowed to set or clear using this function. + */ +int e2p_edit_mntopts(const char *str, __u32 *mntopts, __u32 ok) +{ + char *cp, *buf, *next; + int neg; + unsigned int mask; + + buf = xstrdup(str); + cp = buf; + while (cp && *cp) { + neg = 0; + cp = skip_over_blanks(cp); + next = skip_over_word(cp); + if (*next == 0) + next = 0; + else + *next = 0; + switch (*cp) { + case '-': + case '^': + neg++; + case '+': + cp++; + break; + } + if (e2p_string2mntopt(cp, &mask)) + return 1; + if (ok && !(ok & mask)) + return 1; + if (mask & EXT3_DEFM_JMODE) + *mntopts &= ~EXT3_DEFM_JMODE; + if (neg) + *mntopts &= ~mask; + else + *mntopts |= mask; + cp = next ? next+1 : 0; + } + return 0; +} |