diff options
Diffstat (limited to 'libc/misc/mntent/mntent.c')
| -rw-r--r-- | libc/misc/mntent/mntent.c | 21 |
1 files changed, 19 insertions, 2 deletions
diff --git a/libc/misc/mntent/mntent.c b/libc/misc/mntent/mntent.c index 608f84c1a..610e35af6 100644 --- a/libc/misc/mntent/mntent.c +++ b/libc/misc/mntent/mntent.c @@ -1,5 +1,6 @@ /* * Copyright (C) 2000-2006 Erik Andersen <andersen@uclibc.org> + * Copyright (C) 1995-2020 Free Software Foundation, Inc. * * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball. */ @@ -92,9 +93,25 @@ int addmntent(FILE * filep, const struct mntent *mnt) mnt->mnt_type, mnt->mnt_opts, mnt->mnt_freq, mnt->mnt_passno) < 0 ? 1 : 0); } -char *hasmntopt(const struct mntent *mnt, const char *opt) +/* Search MNT->mnt_opts for an option matching OPT. + Returns the address of the substring, or null if none found. */ +char *hasmntopt (const struct mntent *mnt, const char *opt) { - return strstr(mnt->mnt_opts, opt); + const size_t optlen = strlen(opt); + char *rest = mnt->mnt_opts, *p; + + while ((p = strstr(rest, opt)) != NULL) { + if ((p == rest || p[-1] == ',') + && (p[optlen] == '\0' || p[optlen] == '=' || p[optlen] == ',')) + return p; + + rest = strchr(p, ','); + if (rest == NULL) + break; + ++rest; + } + + return NULL; } FILE *setmntent(const char *name, const char *mode) |