diff options
| -rw-r--r-- | shell/ash.c | 102 |
1 files changed, 91 insertions, 11 deletions
diff --git a/shell/ash.c b/shell/ash.c index d96e568..2674937 100644 --- a/shell/ash.c +++ b/shell/ash.c @@ -39,6 +39,7 @@ #include <setjmp.h> #include <fnmatch.h> +#include <glob.h> #include <sys/times.h> #include <sys/utsname.h> /* for setting $HOSTNAME */ @@ -2808,18 +2809,27 @@ enum { static int SIT(int c, int syntax) { - static const char spec_symbls[] ALIGN1 = "\t\n !\"$&'()*-/:;<=>?[\\]`|}~"; + /* Used to also have '/' in this string: "\t\n !\"$&'()*-/:;<=>?[\\]`|}~" */ + static const char spec_symbls[] ALIGN1 = "\t\n !\"$&'()*-:;<=>?[\\]`|}~"; + /* + * This causes '/' to be prepended with CTLESC in dquoted string, + * making "./file"* treated incorrectly because we feed + * ".\/file*" string to glob(), confusing it (see expandmeta func). + * The "homegrown" glob implementation is okay with that, + * but glibc one isn't. With '/' always treated as CWORD, + * both work fine. + */ # if ENABLE_ASH_ALIAS static const uint8_t syntax_index_table[] ALIGN1 = { 1, 2, 1, 3, 4, 5, 1, 6, /* "\t\n !\"$&'" */ - 7, 8, 3, 3, 3, 3, 1, 1, /* "()*-/:;<" */ + 7, 8, 3, 3,/*3,*/3, 1, 1, /* "()*-/:;<" */ 3, 1, 3, 3, 9, 3, 10, 1, /* "=>?[\\]`|" */ 11, 3 /* "}~" */ }; # else static const uint8_t syntax_index_table[] ALIGN1 = { 0, 1, 0, 2, 3, 4, 0, 5, /* "\t\n !\"$&'" */ - 6, 7, 2, 2, 2, 2, 0, 0, /* "()*-/:;<" */ + 6, 7, 2, 2,/*2,*/2, 0, 0, /* "()*-/:;<" */ 2, 0, 2, 2, 8, 2, 9, 0, /* "=>?[\\]`|" */ 10, 2 /* "}~" */ }; @@ -2901,7 +2911,8 @@ static const uint8_t syntax_index_table[] ALIGN1 = { /* 44 "," */ CWORD_CWORD_CWORD_CWORD, /* 45 "-" */ CWORD_CCTL_CCTL_CWORD, /* 46 "." */ CWORD_CWORD_CWORD_CWORD, - /* 47 "/" */ CWORD_CCTL_CCTL_CWORD, +/* "/" was CWORD_CCTL_CCTL_CWORD, see comment in SIT() function why this is changed: */ + /* 47 "/" */ CWORD_CWORD_CWORD_CWORD, /* 48 "0" */ CWORD_CWORD_CWORD_CWORD, /* 49 "1" */ CWORD_CWORD_CWORD_CWORD, /* 50 "2" */ CWORD_CWORD_CWORD_CWORD, @@ -5633,7 +5644,6 @@ rmescapes(char *str, int flag) while (*p) { if ((unsigned char)*p == CTLQUOTEMARK) { // Note: both inquotes and protect_against_glob only affect whether -// CTLESC,<ch> gets converted to <ch> or to \<ch> inquotes = ~inquotes; p++; protect_against_glob = globbing; @@ -5697,11 +5707,14 @@ memtodest(const char *p, size_t len, int syntax, int quotes) unsigned char c = *p++; if (c) { int n = SIT(c, syntax); - if ((quotes & QUOTES_ESC) && - ((n == CCTL) || - (((quotes & EXP_FULL) || syntax != BASESYNTAX) && - n == CBACK))) + if ((quotes & QUOTES_ESC) + && ((n == CCTL) + || (((quotes & EXP_FULL) || syntax != BASESYNTAX) + && n == CBACK) + ) + ) { USTPUTC(CTLESC, q); + } } else if (!(quotes & QUOTES_KEEPNUL)) continue; USTPUTC(c, q); @@ -6435,7 +6448,8 @@ subevalvar(char *p, char *varname, int strloc, int subtype, char *idx, *end; if (!repl) { - if ((repl=strchr(str, CTLESC))) + repl = strchr(str, CTLESC); + if (repl) *repl++ = '\0'; else repl = nullstr; @@ -6976,6 +6990,70 @@ addfname(const char *name) exparg.lastp = &sp->next; } +/* If we want to use glob() from libc... */ +#if 1 + +/* Add the result of glob() to the list */ +static void +addglob(const glob_t *pglob) +{ + char **p = pglob->gl_pathv; + + do { + addfname(*p); + } while (*++p); +} +static void +expandmeta(struct strlist *str /*, int flag*/) +{ + /* TODO - EXP_REDIR */ + + while (str) { + char *p; + glob_t pglob; + int i; + + if (fflag) + goto nometa; + INT_OFF; + p = preglob(str->text, RMESCAPE_ALLOC | RMESCAPE_HEAP); + /* + * GLOB_NOMAGIC (GNU): if no *?[ chars in pattern, return it even if no match + * TODO?: GLOB_NOCHECK: if no match, return unchanged pattern (sans \* escapes?) + */ + i = glob(p, GLOB_NOMAGIC, NULL, &pglob); + if (p != str->text) + free(p); + switch (i) { + case 0: + /* GLOB_MAGCHAR is set if *?[ chars were seen (GNU) */ + if (!(pglob.gl_flags & GLOB_MAGCHAR)) + goto nometa2; + addglob(&pglob); + globfree(&pglob); + INT_ON; + break; + case GLOB_NOMATCH: +nometa2: + globfree(&pglob); + INT_ON; +nometa: + *exparg.lastp = str; + rmescapes(str->text, 0); + exparg.lastp = &str->next; + break; + default: /* GLOB_NOSPACE */ + globfree(&pglob); + INT_ON; + ash_msg_and_raise_error(bb_msg_memory_exhausted); + } + str = str->next; + } +} + +#else +/* Homegrown globbing code. (dash also has both, uses homegrown one.) */ + /* * Do metacharacter (i.e. *, ?, [...]) expansion. */ @@ -7179,7 +7257,8 @@ expandmeta(struct strlist *str /*, int flag*/) p = preglob(str->text, RMESCAPE_ALLOC | RMESCAPE_HEAP); { int i = strlen(str->text); - expdir = ckmalloc(i < 2048 ? 2048 : i); /* XXX */ +//BUGGY estimation of how long expanded name can be + expdir = ckmalloc(i < 2048 ? 2048 : i+1); } expmeta(expdir, expdir, p); free(expdir); @@ -7204,6 +7283,7 @@ expandmeta(struct strlist *str /*, int flag*/) str = str->next; } } +#endif /* our globbing code */ /* * Perform variable substitution and command substitution on an argument, |