diff options
| -rw-r--r-- | cache.h | 2 | ||||
| -rw-r--r-- | path.c | 124 | ||||
| -rw-r--r-- | setup.c | 88 | ||||
| -rwxr-xr-x | t/t0060-path-utils.sh | 33 | ||||
| -rwxr-xr-x | t/t1504-ceiling-dirs.sh | 6 | ||||
| -rw-r--r-- | test-path-utils.c | 14 |
6 files changed, 115 insertions, 152 deletions
@@ -627,7 +627,7 @@ int is_directory(const char *); const char *make_absolute_path(const char *path); const char *make_nonrelative_path(const char *path); const char *make_relative_path(const char *abs, const char *base); -int normalize_absolute_path(char *buf, const char *path); +int normalize_path_copy(char *dst, const char *src); int longest_ancestor_length(const char *path, const char *prefix_list); /* Read and unpack a sha1 file into memory, write memory to a sha1 file */ @@ -363,56 +363,97 @@ const char *make_relative_path(const char *abs, const char *base) } /* - * path = absolute path - * buf = buffer of at least max(2, strlen(path)+1) bytes - * It is okay if buf == path, but they should not overlap otherwise. + * It is okay if dst == src, but they should not overlap otherwise. * - * Performs the following normalizations on path, storing the result in buf: - * - Removes trailing slashes. - * - Removes empty components. + * Performs the following normalizations on src, storing the result in dst: + * - Ensures that components are separated by '/' (Windows only) + * - Squashes sequences of '/'. * - Removes "." components. * - Removes ".." components, and the components the precede them. - * "" and paths that contain only slashes are normalized to "/". - * Returns the length of the output. + * Returns failure (non-zero) if a ".." component appears as first path + * component anytime during the normalization. Otherwise, returns success (0). * * Note that this function is purely textual. It does not follow symlinks, * verify the existence of the path, or make any system calls. */ -int normalize_absolute_path(char *buf, const char *path) +int normalize_path_copy(char *dst, const char *src) { - const char *comp_start = path, *comp_end = path; - char *dst = buf; - int comp_len; - assert(buf); - assert(path); - - while (*comp_start) { - assert(*comp_start == '/'); - while (*++comp_end && *comp_end != '/') - ; /* nothing */ - comp_len = comp_end - comp_start; - - if (!strncmp("/", comp_start, comp_len) || - !strncmp("/.", comp_start, comp_len)) - goto next; - - if (!strncmp("/..", comp_start, comp_len)) { - while (dst > buf && *--dst != '/') - ; /* nothing */ - goto next; - } + char *dst0; - memmove(dst, comp_start, comp_len); - dst += comp_len; - next: - comp_start = comp_end; + if (has_dos_drive_prefix(src)) { + *dst++ = *src++; + *dst++ = *src++; } + dst0 = dst; - if (dst == buf) + if (is_dir_sep(*src)) { *dst++ = '/'; + while (is_dir_sep(*src)) + src++; + } + + for (;;) { + char c = *src; + + /* + * A path component that begins with . could be + * special: + * (1) "." and ends -- ignore and terminate. + * (2) "./" -- ignore them, eat slash and continue. + * (3) ".." and ends -- strip one and terminate. + * (4) "../" -- strip one, eat slash and continue. + */ + if (c == '.') { + if (!src[1]) { + /* (1) */ + src++; + } else if (is_dir_sep(src[1])) { + /* (2) */ + src += 2; + while (is_dir_sep(*src)) + src++; + continue; + } else if (src[1] == '.') { + if (!src[2]) { + /* (3) */ + src += 2; + goto up_one; + } else if (is_dir_sep(src[2])) { + /* (4) */ + src += 3; + while (is_dir_sep(*src)) + src++; + goto up_one; + } + } + } + /* copy up to the next '/', and eat all '/' */ + while ((c = *src++) != '\0' && !is_dir_sep(c)) + *dst++ = c; + if (is_dir_sep(c)) { + *dst++ = '/'; + while (is_dir_sep(c)) + c = *src++; + src--; + } else if (!c) + break; + continue; + + up_one: + /* + * dst0..dst is prefix portion, and dst[-1] is '/'; + * go up one level. + */ + dst--; /* go to trailing '/' */ + if (dst <= dst0) + return -1; + /* Windows: dst[-1] cannot be backslash anymore */ + while (dst0 < dst && dst[-1] != '/') + dst--; + } *dst = '\0'; - return dst - buf; + return 0; } /* @@ -438,15 +479,16 @@ int longest_ancestor_length(const char *path, const char *prefix_list) return -1; for (colon = ceil = prefix_list; *colon; ceil = colon+1) { - for (colon = ceil; *colon && *colon != ':'; colon++); + for (colon = ceil; *colon && *colon != PATH_SEP; colon++); len = colon - ceil; if (len == 0 || len > PATH_MAX || !is_absolute_path(ceil)) continue; strlcpy(buf, ceil, len+1); - len = normalize_absolute_path(buf, buf); - /* Strip "trailing slashes" from "/". */ - if (len == 1) - len = 0; + if (normalize_path_copy(buf, buf) < 0) + continue; + len = strlen(buf); + if (len > 0 && buf[len-1] == '/') + buf[--len] = '\0'; if (!strncmp(path, buf, len) && path[len] == '/' && @@ -4,92 +4,6 @@ static int inside_git_dir = -1; static int inside_work_tree = -1; -static int sanitary_path_copy(char *dst, const char *src) -{ - char *dst0; - - if (has_dos_drive_prefix(src)) { - *dst++ = *src++; - *dst++ = *src++; - } - dst0 = dst; - - if (is_dir_sep(*src)) { - *dst++ = '/'; - while (is_dir_sep(*src)) - src++; - } - - for (;;) { - char c = *src; - - /* - * A path component that begins with . could be - * special: - * (1) "." and ends -- ignore and terminate. - * (2) "./" -- ignore them, eat slash and continue. - * (3) ".." and ends -- strip one and terminate. - * (4) "../" -- strip one, eat slash and continue. - */ - if (c == '.') { - if (!src[1]) { - /* (1) */ - src++; - } else if (is_dir_sep(src[1])) { - /* (2) */ - src += 2; - while (is_dir_sep(*src)) - src++; - continue; - } else if (src[1] == '.') { - if (!src[2]) { - /* (3) */ - src += 2; - goto up_one; - } else if (is_dir_sep(src[2])) { - /* (4) */ - src += 3; - while (is_dir_sep(*src)) - src++; - goto up_one; - } - } - } - - /* copy up to the next '/', and eat all '/' */ - while ((c = *src++) != '\0' && !is_dir_sep(c)) - *dst++ = c; - if (is_dir_sep(c)) { - *dst++ = '/'; - while (is_dir_sep(c)) - c = *src++; - src--; - } else if (!c) - break; - continue; - - up_one: - /* - * dst0..dst is prefix portion, and dst[-1] is '/'; - * go up one level. - */ - dst -= 2; /* go past trailing '/' if any */ - if (dst < dst0) - return -1; - while (1) { - if (dst <= dst0) - break; - c = *dst--; - if (c == '/') { /* MinGW: cannot be '\\' anymore */ - dst += 2; - break; - } - } - } - *dst = '\0'; - return 0; -} - const char *prefix_path(const char *prefix, int len, const char *path) { const char *orig = path; @@ -101,7 +15,7 @@ const char *prefix_path(const char *prefix, int len, const char *path) memcpy(sanitized, prefix, len); strcpy(sanitized + len, path); } - if (sanitary_path_copy(sanitized, sanitized)) + if (normalize_path_copy(sanitized, sanitized)) goto error_out; if (is_absolute_path(orig)) { const char *work_tree = get_git_work_tree(); diff --git a/t/t0060-path-utils.sh b/t/t0060-path-utils.sh index 6e7501f352..4ed1f0b4dd 100755 --- a/t/t0060-path-utils.sh +++ b/t/t0060-path-utils.sh @@ -8,36 +8,37 @@ test_description='Test various path utilities' . ./test-lib.sh norm_abs() { - test_expect_success "normalize absolute" \ - "test \$(test-path-utils normalize_absolute_path '$1') = '$2'" + test_expect_success "normalize absolute: $1 => $2" \ + "test \"\$(test-path-utils normalize_path_copy '$1')\" = '$2'" } ancestor() { - test_expect_success "longest ancestor" \ - "test \$(test-path-utils longest_ancestor_length '$1' '$2') = '$3'" + test_expect_success "longest ancestor: $1 $2 => $3" \ + "test \"\$(test-path-utils longest_ancestor_length '$1' '$2')\" = '$3'" } -norm_abs "" / +norm_abs "" "" norm_abs / / norm_abs // / norm_abs /// / norm_abs /. / norm_abs /./ / -norm_abs /./.. / -norm_abs /../. / -norm_abs /./../.// / +norm_abs /./.. ++failed++ +norm_abs /../. ++failed++ +norm_abs /./../.// ++failed++ norm_abs /dir/.. / norm_abs /dir/sub/../.. / +norm_abs /dir/sub/../../.. ++failed++ norm_abs /dir /dir -norm_abs /dir// /dir +norm_abs /dir// /dir/ norm_abs /./dir /dir -norm_abs /dir/. /dir -norm_abs /dir///./ /dir -norm_abs /dir//sub/.. /dir -norm_abs /dir/sub/../ /dir -norm_abs //dir/sub/../. /dir -norm_abs /dir/s1/../s2/ /dir/s2 -norm_abs /d1/s1///s2/..//../s3/ /d1/s3 +norm_abs /dir/. /dir/ +norm_abs /dir///./ /dir/ +norm_abs /dir//sub/.. /dir/ +norm_abs /dir/sub/../ /dir/ +norm_abs //dir/sub/../. /dir/ +norm_abs /dir/s1/../s2/ /dir/s2/ +norm_abs /d1/s1///s2/..//../s3/ /d1/s3/ norm_abs /d1/s1//../s2/../../d2 /d2 norm_abs /d1/.../d2 /d1/.../d2 norm_abs /d1/..././../d2 /d1/d2 diff --git a/t/t1504-ceiling-dirs.sh b/t/t1504-ceiling-dirs.sh index 91b704a3a4..e377d48902 100755 --- a/t/t1504-ceiling-dirs.sh +++ b/t/t1504-ceiling-dirs.sh @@ -93,13 +93,13 @@ GIT_CEILING_DIRECTORIES="$TRASH_ROOT/subdi" test_prefix subdir_ceil_at_subdi_slash "sub/dir/" -GIT_CEILING_DIRECTORIES="foo:$TRASH_ROOT/sub" +GIT_CEILING_DIRECTORIES="/foo:$TRASH_ROOT/sub" test_fail second_of_two -GIT_CEILING_DIRECTORIES="$TRASH_ROOT/sub:bar" +GIT_CEILING_DIRECTORIES="$TRASH_ROOT/sub:/bar" test_fail first_of_two -GIT_CEILING_DIRECTORIES="foo:$TRASH_ROOT/sub:bar" +GIT_CEILING_DIRECTORIES="/foo:$TRASH_ROOT/sub:/bar" test_fail second_of_three diff --git a/test-path-utils.c b/test-path-utils.c index 2c0f5a37e8..5168a8e3df 100644 --- a/test-path-utils.c +++ b/test-path-utils.c @@ -2,11 +2,13 @@ int main(int argc, char **argv) { - if (argc == 3 && !strcmp(argv[1], "normalize_absolute_path")) { + if (argc == 3 && !strcmp(argv[1], "normalize_path_copy")) { char *buf = xmalloc(PATH_MAX + 1); - int rv = normalize_absolute_path(buf, argv[2]); - assert(strlen(buf) == rv); + int rv = normalize_path_copy(buf, argv[2]); + if (rv) + buf = "++failed++"; puts(buf); + return 0; } if (argc >= 2 && !strcmp(argv[1], "make_absolute_path")) { @@ -15,12 +17,16 @@ int main(int argc, char **argv) argc--; argv++; } + return 0; } if (argc == 4 && !strcmp(argv[1], "longest_ancestor_length")) { int len = longest_ancestor_length(argv[2], argv[3]); printf("%d\n", len); + return 0; } - return 0; + fprintf(stderr, "%s: unknown function name: %s\n", argv[0], + argv[1] ? argv[1] : "(there was none)"); + return 1; } |