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python-libmount.6436
util-linux-libmount-ignore-redundant-slashes.patch
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File util-linux-libmount-ignore-redundant-slashes.patch of Package python-libmount.6436
From d4e89dea4e8e95cee0cede39dc77618a181b8d19 Mon Sep 17 00:00:00 2001 From: Karel Zak <kzak@redhat.com> Date: Mon, 8 Aug 2016 17:23:54 +0200 Subject: [PATCH] libmount: ignore redundant slashes ///aaa/bbb and /aaa/bbb/ are the same paths. This is important especially with NFS where number of slashes are not the same in the /proc/self/mountinfo and fstab or utab. The regular URI is euler://tmp but /proc contains euler:/tmp Reported-by: Ales Novak <alnovak@suse.cz> Signed-off-by: Karel Zak <kzak@redhat.com> --- include/strutils.h | 2 +- lib/strutils.c | 100 ++++++++++++++++++++++++++++++++++-------------- libmount/src/cache.c | 2 +- libmount/src/fs.c | 14 ++++--- tests/ts/misc/strtosize | 68 ++++++++++++++++---------------- 5 files changed, 116 insertions(+), 70 deletions(-) diff --git a/include/strutils.h b/include/strutils.h index f303450..52c28b7 100644 --- a/include/strutils.h +++ b/include/strutils.h @@ -110,7 +110,7 @@ extern int string_to_bitmask(const char *list, long (*name2flag)(const char *, size_t)); extern int parse_range(const char *str, int *lower, int *upper, int def); -extern int streq_except_trailing_slash(const char *s1, const char *s2); +extern int streq_paths(const char *a, const char *b); /* * Match string beginning. diff --git a/lib/strutils.c b/lib/strutils.c index 8c47c81..d3b998f 100644 --- a/lib/strutils.c +++ b/lib/strutils.c @@ -748,39 +748,56 @@ int parse_range(const char *str, int *lower, int *upper, int def) return 0; } -/* - * Compare two strings for equality, ignoring at most one trailing - * slash. - */ -int streq_except_trailing_slash(const char *s1, const char *s2) +static const char *next_path_segment(const char *str, size_t *sz) { - int equal; + const char *start, *p; - if (!s1 && !s2) - return 1; - if (!s1 || !s2) - return 0; + start = str; + *sz = 0; + while (start && *start == '/' && *(start + 1) == '/') + start++; + + if (!start || !*start) + return NULL; + + for (*sz = 1, p = start + 1; *p && *p != '/'; p++) { + (*sz)++; + } + + return start; +} - equal = !strcmp(s1, s2); +int streq_paths(const char *a, const char *b) +{ + while (a && b) { + size_t a_sz, b_sz; + const char *a_seg = next_path_segment(a, &a_sz); + const char *b_seg = next_path_segment(b, &b_sz); + + /* + fprintf(stderr, "A>>>(%zu) '%s'\n", a_sz, a_seg); + fprintf(stderr, "B>>>(%zu) '%s'\n", b_sz, b_seg); + */ - if (!equal) { - size_t len1 = strlen(s1); - size_t len2 = strlen(s2); + /* end of the path */ + if (a_sz + b_sz == 0) + return 1; + + /* ignore tailing slash */ + if (a_sz + b_sz == 1 && + ((a_seg && *a_seg == '/') || (b_seg && *b_seg == '/'))) + return 1; - if (len1 && *(s1 + len1 - 1) == '/') - len1--; - if (len2 && *(s2 + len2 - 1) == '/') - len2--; - if (len1 != len2) + if (a_sz != b_sz || strncmp(a_seg, b_seg, a_sz) != 0) return 0; - equal = !strncmp(s1, s2, len1); - } + a = a_seg + a_sz; + b = b_seg + b_sz; + }; - return equal; + return 0; } - char *strnappend(const char *s, const char *suffix, size_t b) { size_t a; @@ -912,15 +929,13 @@ int skip_fline(FILE *fp) #ifdef TEST_PROGRAM -int main(int argc, char *argv[]) +static int test_strutils_sizes(int argc, char *argv[]) { uintmax_t size = 0; char *hum, *hum2; - if (argc < 2) { - fprintf(stderr, "usage: %s <number>[suffix]\n", argv[0]); - exit(EXIT_FAILURE); - } + if (argc < 2) + return EXIT_FAILURE; if (strtosize(argv[1], &size)) errx(EXIT_FAILURE, "invalid size '%s' value", argv[1]); @@ -935,4 +950,33 @@ int main(int argc, char *argv[]) return EXIT_SUCCESS; } + +static int test_strutils_cmp_paths(int argc, char *argv[]) +{ + int rc = streq_paths(argv[1], argv[2]); + + if (argc < 3) + return EXIT_FAILURE; + + printf("%s: '%s' '%s'\n", rc == 1 ? "YES" : "NOT", argv[1], argv[2]); + return EXIT_SUCCESS; +} + +int main(int argc, char *argv[]) +{ + if (argc == 3 && strcmp(argv[1], "--size") == 0) + return test_strutils_sizes(argc - 1, argv + 1); + + else if (argc == 4 && strcmp(argv[1], "--cmp-paths") == 0) + return test_strutils_cmp_paths(argc - 1, argv + 1); + + else { + fprintf(stderr, "usage: %1$s --size <number>[suffix]\n" + " %1$s --cmp-paths <path> <path>\n", + argv[0]); + exit(EXIT_FAILURE); + } + + return EXIT_FAILURE; +} #endif /* TEST_PROGRAM */ diff --git a/libmount/src/cache.c b/libmount/src/cache.c index b83706a..04dcb7f 100644 --- a/libmount/src/cache.c +++ b/libmount/src/cache.c @@ -248,7 +248,7 @@ static const char *cache_find_path(struct libmnt_cache *cache, const char *path) struct mnt_cache_entry *e = &cache->ents[i]; if (!(e->flag & MNT_CACHE_ISPATH)) continue; - if (streq_except_trailing_slash(path, e->key)) + if (streq_paths(path, e->key)) return e->value; } return NULL; diff --git a/libmount/src/fs.c b/libmount/src/fs.c index c92b6ab..f8f63d4 100644 --- a/libmount/src/fs.c +++ b/libmount/src/fs.c @@ -422,8 +422,9 @@ int mnt_fs_set_source(struct libmnt_fs *fs, const char *source) * @fs: fs * @path: source path * - * Compares @fs source path with @path. The trailing slash is ignored. - * See also mnt_fs_match_source(). + * Compares @fs source path with @path. The redundant slashs are ignored. + * This function compares strings and does not cannonicalize the paths. + * See also more heavy and generic mnt_fs_match_source(). * * Returns: 1 if @fs source path equal to @path, otherwise 0. */ @@ -437,7 +438,7 @@ int mnt_fs_streq_srcpath(struct libmnt_fs *fs, const char *path) p = mnt_fs_get_srcpath(fs); if (!mnt_fs_is_pseudofs(fs)) - return streq_except_trailing_slash(p, path); + return streq_paths(p, path); if (!p && !path) return 1; @@ -450,14 +451,15 @@ int mnt_fs_streq_srcpath(struct libmnt_fs *fs, const char *path) * @fs: fs * @path: mount point * - * Compares @fs target path with @path. The trailing slash is ignored. - * See also mnt_fs_match_target(). + * Compares @fs target path with @path. The redundant slashs are ignored. + * This function compares strings and does not cannonicalize the paths. + * See also more generic mnt_fs_match_target(). * * Returns: 1 if @fs target path equal to @path, otherwise 0. */ int mnt_fs_streq_target(struct libmnt_fs *fs, const char *path) { - return fs && streq_except_trailing_slash(mnt_fs_get_target(fs), path); + return fs && streq_paths(mnt_fs_get_target(fs), path); } /** diff --git a/tests/ts/misc/strtosize b/tests/ts/misc/strtosize index 4b08b5e..68b3b8b 100755 --- a/tests/ts/misc/strtosize +++ b/tests/ts/misc/strtosize @@ -21,40 +21,40 @@ TS_DESC="strtosize" . $TS_TOPDIR/functions.sh ts_init "$*" -$TS_HELPER_STRUTILS -1 >> $TS_OUTPUT 2>&1 -$TS_HELPER_STRUTILS 0 >> $TS_OUTPUT 2>&1 -$TS_HELPER_STRUTILS 1 >> $TS_OUTPUT 2>&1 -$TS_HELPER_STRUTILS 123 >> $TS_OUTPUT 2>&1 -$TS_HELPER_STRUTILS 18446744073709551615 >> $TS_OUTPUT 2>&1 - -$TS_HELPER_STRUTILS 1K >> $TS_OUTPUT 2>&1 -$TS_HELPER_STRUTILS 1KiB >> $TS_OUTPUT 2>&1 -$TS_HELPER_STRUTILS 1M >> $TS_OUTPUT 2>&1 -$TS_HELPER_STRUTILS 1MiB >> $TS_OUTPUT 2>&1 -$TS_HELPER_STRUTILS 1G >> $TS_OUTPUT 2>&1 -$TS_HELPER_STRUTILS 1GiB >> $TS_OUTPUT 2>&1 -$TS_HELPER_STRUTILS 1T >> $TS_OUTPUT 2>&1 -$TS_HELPER_STRUTILS 1TiB >> $TS_OUTPUT 2>&1 -$TS_HELPER_STRUTILS 1P >> $TS_OUTPUT 2>&1 -$TS_HELPER_STRUTILS 1PiB >> $TS_OUTPUT 2>&1 -$TS_HELPER_STRUTILS 1E >> $TS_OUTPUT 2>&1 -$TS_HELPER_STRUTILS 1EiB >> $TS_OUTPUT 2>&1 - -$TS_HELPER_STRUTILS 1KB >> $TS_OUTPUT 2>&1 -$TS_HELPER_STRUTILS 1MB >> $TS_OUTPUT 2>&1 -$TS_HELPER_STRUTILS 1GB >> $TS_OUTPUT 2>&1 -$TS_HELPER_STRUTILS 1TB >> $TS_OUTPUT 2>&1 -$TS_HELPER_STRUTILS 1PB >> $TS_OUTPUT 2>&1 -$TS_HELPER_STRUTILS 1EB >> $TS_OUTPUT 2>&1 - -$TS_HELPER_STRUTILS "" >> $TS_OUTPUT 2>&1 -$TS_HELPER_STRUTILS " " >> $TS_OUTPUT 2>&1 -$TS_HELPER_STRUTILS " 1" >> $TS_OUTPUT 2>&1 -$TS_HELPER_STRUTILS "1 " >> $TS_OUTPUT 2>&1 - -$TS_HELPER_STRUTILS 0x0a >> $TS_OUTPUT 2>&1 -$TS_HELPER_STRUTILS 0xff00 >> $TS_OUTPUT 2>&1 -$TS_HELPER_STRUTILS 0x80000000 >> $TS_OUTPUT 2>&1 +$TS_HELPER_STRUTILS --size -1 >> $TS_OUTPUT 2>&1 +$TS_HELPER_STRUTILS --size 0 >> $TS_OUTPUT 2>&1 +$TS_HELPER_STRUTILS --size 1 >> $TS_OUTPUT 2>&1 +$TS_HELPER_STRUTILS --size 123 >> $TS_OUTPUT 2>&1 +$TS_HELPER_STRUTILS --size 18446744073709551615 >> $TS_OUTPUT 2>&1 + +$TS_HELPER_STRUTILS --size 1K >> $TS_OUTPUT 2>&1 +$TS_HELPER_STRUTILS --size 1KiB >> $TS_OUTPUT 2>&1 +$TS_HELPER_STRUTILS --size 1M >> $TS_OUTPUT 2>&1 +$TS_HELPER_STRUTILS --size 1MiB >> $TS_OUTPUT 2>&1 +$TS_HELPER_STRUTILS --size 1G >> $TS_OUTPUT 2>&1 +$TS_HELPER_STRUTILS --size 1GiB >> $TS_OUTPUT 2>&1 +$TS_HELPER_STRUTILS --size 1T >> $TS_OUTPUT 2>&1 +$TS_HELPER_STRUTILS --size 1TiB >> $TS_OUTPUT 2>&1 +$TS_HELPER_STRUTILS --size 1P >> $TS_OUTPUT 2>&1 +$TS_HELPER_STRUTILS --size 1PiB >> $TS_OUTPUT 2>&1 +$TS_HELPER_STRUTILS --size 1E >> $TS_OUTPUT 2>&1 +$TS_HELPER_STRUTILS --size 1EiB >> $TS_OUTPUT 2>&1 + +$TS_HELPER_STRUTILS --size 1KB >> $TS_OUTPUT 2>&1 +$TS_HELPER_STRUTILS --size 1MB >> $TS_OUTPUT 2>&1 +$TS_HELPER_STRUTILS --size 1GB >> $TS_OUTPUT 2>&1 +$TS_HELPER_STRUTILS --size 1TB >> $TS_OUTPUT 2>&1 +$TS_HELPER_STRUTILS --size 1PB >> $TS_OUTPUT 2>&1 +$TS_HELPER_STRUTILS --size 1EB >> $TS_OUTPUT 2>&1 + +$TS_HELPER_STRUTILS --size "" >> $TS_OUTPUT 2>&1 +$TS_HELPER_STRUTILS --size " " >> $TS_OUTPUT 2>&1 +$TS_HELPER_STRUTILS --size " 1" >> $TS_OUTPUT 2>&1 +$TS_HELPER_STRUTILS --size "1 " >> $TS_OUTPUT 2>&1 + +$TS_HELPER_STRUTILS --size 0x0a >> $TS_OUTPUT 2>&1 +$TS_HELPER_STRUTILS --size 0xff00 >> $TS_OUTPUT 2>&1 +$TS_HELPER_STRUTILS --size 0x80000000 >> $TS_OUTPUT 2>&1 ts_finalize -- 2.10.1
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