/* Builtin function expansion for GNU Make. Copyright (C) 1988,1989,1991-1997,1999 Free Software Foundation, Inc. This file is part of GNU Make. GNU Make is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2, or (at your option) any later version. GNU Make is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with GNU Make; see the file COPYING. If not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #include "make.h" #include "filedef.h" #include "variable.h" #include "dep.h" #include "job.h" #include "commands.h" #include "debug.h" #ifdef _AMIGA #include "amiga.h" #endif struct function_table_entry { const char *name; unsigned char len; unsigned char minimum_args; unsigned char maximum_args; char expand_args; char *(*func_ptr) PARAMS ((char *output, char **argv, const char *fname)); }; /* Store into VARIABLE_BUFFER at O the result of scanning TEXT and replacing each occurrence of SUBST with REPLACE. TEXT is null-terminated. SLEN is the length of SUBST and RLEN is the length of REPLACE. If BY_WORD is nonzero, substitutions are done only on matches which are complete whitespace-delimited words. If SUFFIX_ONLY is nonzero, substitutions are done only at the ends of whitespace-delimited words. */ char * subst_expand (o, text, subst, replace, slen, rlen, by_word, suffix_only) char *o; char *text; char *subst, *replace; unsigned int slen, rlen; int by_word, suffix_only; { register char *t = text; register char *p; if (slen == 0 && !by_word && !suffix_only) { /* The first occurrence of "" in any string is its end. */ o = variable_buffer_output (o, t, strlen (t)); if (rlen > 0) o = variable_buffer_output (o, replace, rlen); return o; } do { if ((by_word | suffix_only) && slen == 0) /* When matching by words, the empty string should match the end of each word, rather than the end of the whole text. */ p = end_of_token (next_token (t)); else { p = sindex (t, 0, subst, slen); if (p == 0) { /* No more matches. Output everything left on the end. */ o = variable_buffer_output (o, t, strlen (t)); return o; } } /* Output everything before this occurrence of the string to replace. */ if (p > t) o = variable_buffer_output (o, t, p - t); /* If we're substituting only by fully matched words, or only at the ends of words, check that this case qualifies. */ if ((by_word && ((p > t && !isblank ((unsigned char)p[-1])) || (p[slen] != '\0' && !isblank ((unsigned char)p[slen])))) || (suffix_only && (p[slen] != '\0' && !isblank ((unsigned char)p[slen])))) /* Struck out. Output the rest of the string that is no longer to be replaced. */ o = variable_buffer_output (o, subst, slen); else if (rlen > 0) /* Output the replacement string. */ o = variable_buffer_output (o, replace, rlen); /* Advance T past the string to be replaced. */ t = p + slen; } while (*t != '\0'); return o; } /* Store into VARIABLE_BUFFER at O the result of scanning TEXT and replacing strings matching PATTERN with REPLACE. If PATTERN_PERCENT is not nil, PATTERN has already been run through find_percent, and PATTERN_PERCENT is the result. If REPLACE_PERCENT is not nil, REPLACE has already been run through find_percent, and REPLACE_PERCENT is the result. */ char * patsubst_expand (o, text, pattern, replace, pattern_percent, replace_percent) char *o; char *text; register char *pattern, *replace; register char *pattern_percent, *replace_percent; { unsigned int pattern_prepercent_len, pattern_postpercent_len; unsigned int replace_prepercent_len, replace_postpercent_len = 0; char *t; int len; int doneany = 0; /* We call find_percent on REPLACE before checking PATTERN so that REPLACE will be collapsed before we call subst_expand if PATTERN has no %. */ if (replace_percent == 0) replace_percent = find_percent (replace); if (replace_percent != 0) { /* Record the length of REPLACE before and after the % so we don't have to compute these lengths more than once. */ replace_prepercent_len = replace_percent - replace; replace_postpercent_len = strlen (replace_percent + 1); } else /* We store the length of the replacement so we only need to compute it once. */ replace_prepercent_len = strlen (replace); if (pattern_percent == 0) pattern_percent = find_percent (pattern); if (pattern_percent == 0) /* With no % in the pattern, this is just a simple substitution. */ return subst_expand (o, text, pattern, replace, strlen (pattern), strlen (replace), 1, 0); /* Record the length of PATTERN before and after the % so we don't have to compute it more than once. */ pattern_prepercent_len = pattern_percent - pattern; pattern_postpercent_len = strlen (pattern_percent + 1); while ((t = find_next_token (&text, &len)) != 0) { int fail = 0; /* Is it big enough to match? */ if (len < pattern_prepercent_len + pattern_postpercent_len) fail = 1; /* Does the prefix match? */ if (!fail && pattern_prepercent_len > 0 && (*t != *pattern || t[pattern_prepercent_len - 1] != pattern_percent[-1] || !strneq (t + 1, pattern + 1, pattern_prepercent_len - 1))) fail = 1; /* Does the suffix match? */ if (!fail && pattern_postpercent_len > 0 && (t[len - 1] != pattern_percent[pattern_postpercent_len] || t[len - pattern_postpercent_len] != pattern_percent[1] || !strneq (&t[len - pattern_postpercent_len], &pattern_percent[1], pattern_postpercent_len - 1))) fail = 1; if (fail) /* It didn't match. Output the string. */ o = variable_buffer_output (o, t, len); else { /* It matched. Output the replacement. */ /* Output the part of the replacement before the %. */ o = variable_buffer_output (o, replace, replace_prepercent_len); if (replace_percent != 0) { /* Output the part of the matched string that matched the % in the pattern. */ o = variable_buffer_output (o, t + pattern_prepercent_len, len - (pattern_prepercent_len + pattern_postpercent_len)); /* Output the part of the replacement after the %. */ o = variable_buffer_output (o, replace_percent + 1, replace_postpercent_len); } } /* Output a space, but not if the replacement is "". */ if (fail || replace_prepercent_len > 0 || (replace_percent != 0 && len + replace_postpercent_len > 0)) { o = variable_buffer_output (o, " ", 1); doneany = 1; } } if (doneany) /* Kill the last space. */ --o; return o; } /* Look up a function by name. The table is currently small enough that it's not really worthwhile to use a fancier lookup algorithm. If it gets larger, maybe... */ static const struct function_table_entry * lookup_function (table, s) const struct function_table_entry *table; const char *s; { int len = strlen (s); for (; table->name != NULL; ++table) if (table->len <= len && (isblank ((unsigned char)s[table->len]) || s[table->len] == '\0') && strneq (s, table->name, table->len)) return table; return NULL; } /* Return 1 if PATTERN matches STR, 0 if not. */ int pattern_matches (pattern, percent, str) register char *pattern, *percent, *str; { unsigned int sfxlen, strlength; if (percent == 0) { unsigned int len = strlen (pattern) + 1; char *new_chars = (char *) alloca (len); bcopy (pattern, new_chars, len); pattern = new_chars; percent = find_percent (pattern); if (percent == 0) return streq (pattern, str); } sfxlen = strlen (percent + 1); strlength = strlen (str); if (strlength < (percent - pattern) + sfxlen || !strneq (pattern, str, percent - pattern)) return 0; return !strcmp (percent + 1, str + (strlength - sfxlen)); } /* Find the next comma or ENDPAREN (counting nested STARTPAREN and ENDPARENtheses), starting at PTR before END. Return a pointer to next character. If no next argument is found, return NULL. */ static char * find_next_argument (startparen, endparen, ptr, end) char startparen; char endparen; const char *ptr; const char *end; { int count = 0; for (; ptr < end; ++ptr) if (*ptr == startparen) ++count; else if (*ptr == endparen) { --count; if (count < 0) return NULL; } else if (*ptr == ',' && !count) return (char *)ptr; /* We didn't find anything. */ return NULL; } /* Glob-expand LINE. The returned pointer is only good until the next call to string_glob. */ static char * string_glob (line) char *line; { static char *result = 0; static unsigned int length; register struct nameseq *chain; register unsigned int idx; chain = multi_glob (parse_file_seq (&line, '\0', sizeof (struct nameseq), /* We do not want parse_file_seq to strip `./'s. That would break examples like: $(patsubst ./%.c,obj/%.o,$(wildcard ./?*.c)). */ 0), sizeof (struct nameseq)); if (result == 0) { length = 100; result = (char *) xmalloc (100); } idx = 0; while (chain != 0) { register char *name = chain->name; unsigned int len = strlen (name); struct nameseq *next = chain->next; free ((char *) chain); chain = next; /* multi_glob will pass names without globbing metacharacters through as is, but we want only files that actually exist. */ if (file_exists_p (name)) { if (idx + len + 1 > length) { length += (len + 1) * 2; result = (char *) xrealloc (result, length); } bcopy (name, &result[idx], len); idx += len; result[idx++] = ' '; } free (name); } /* Kill the last space and terminate the string. */ if (idx == 0) result[0] = '\0'; else result[idx - 1] = '\0'; return result; } /* Builtin functions */ static char * func_patsubst (o, argv, funcname) char *o; char **argv; const char *funcname; { o = patsubst_expand (o, argv[2], argv[0], argv[1], (char *) 0, (char *) 0); return o; } static char * func_join (o, argv, funcname) char *o; char **argv; const char *funcname; { int doneany = 0; /* Write each word of the first argument directly followed by the corresponding word of the second argument. If the two arguments have a different number of words, the excess words are just output separated by blanks. */ register char *tp; register char *pp; char *list1_iterator = argv[0]; char *list2_iterator = argv[1]; do { unsigned int len1, len2; tp = find_next_token (&list1_iterator, &len1); if (tp != 0) o = variable_buffer_output (o, tp, len1); pp = find_next_token (&list2_iterator, &len2); if (pp != 0) o = variable_buffer_output (o, pp, len2); if (tp != 0 || pp != 0) { o = variable_buffer_output (o, " ", 1); doneany = 1; } } while (tp != 0 || pp != 0); if (doneany) /* Kill the last blank. */ --o; return o; } static char * func_origin (o, argv, funcname) char *o; char **argv; const char *funcname; { /* Expand the argument. */ register struct variable *v = lookup_variable (argv[0], strlen (argv[0])); if (v == 0) o = variable_buffer_output (o, "undefined", 9); else switch (v->origin) { default: case o_invalid: abort (); break; case o_default: o = variable_buffer_output (o, "default", 7); break; case o_env: o = variable_buffer_output (o, "environment", 11); break; case o_file: o = variable_buffer_output (o, "file", 4); break; case o_env_override: o = variable_buffer_output (o, "environment override", 20); break; case o_command: o = variable_buffer_output (o, "command line", 12); break; case o_override: o = variable_buffer_output (o, "override", 8); break; case o_automatic: o = variable_buffer_output (o, "automatic", 9); break; } return o; } #ifdef VMS #define IS_PATHSEP(c) ((c) == ']') #else #if defined(__MSDOS__) || defined(WINDOWS32) #define IS_PATHSEP(c) ((c) == '/' || (c) == '\\') #else #define IS_PATHSEP(c) ((c) == '/') #endif #endif static char * func_notdir_suffix (o, argv, funcname) char *o; char **argv; const char *funcname; { /* Expand the argument. */ char *list_iterator = argv[0]; char *p2 =0; int doneany =0; unsigned int len=0; int is_suffix = streq (funcname, "suffix"); int is_notdir = !is_suffix; while ((p2 = find_next_token (&list_iterator, &len)) != 0) { char *p = p2 + len; while (p >= p2 && (!is_suffix || *p != '.')) { if (IS_PATHSEP (*p)) break; --p; } if (p >= p2) { if (is_notdir) ++p; else if (*p != '.') continue; o = variable_buffer_output (o, p, len - (p - p2)); } #if defined(WINDOWS32) || defined(__MSDOS__) /* Handle the case of "d:foo/bar". */ else if (streq (funcname, "notdir") && p2[0] && p2[1] == ':') { p = p2 + 2; o = variable_buffer_output (o, p, len - (p - p2)); } #endif else if (is_notdir) o = variable_buffer_output (o, p2, len); if (is_notdir || p >= p2) { o = variable_buffer_output (o, " ", 1); doneany = 1; } } if (doneany) /* Kill last space. */ --o; return o; } static char * func_basename_dir (o, argv, funcname) char *o; char **argv; const char *funcname; { /* Expand the argument. */ char *p3 = argv[0]; char *p2=0; int doneany=0; unsigned int len=0; char *p=0; int is_basename= streq (funcname, "basename"); int is_dir= !is_basename; while ((p2 = find_next_token (&p3, &len)) != 0) { p = p2 + len; while (p >= p2 && (!is_basename || *p != '.')) { if (IS_PATHSEP (*p)) break; --p; } if (p >= p2 && (is_dir)) o = variable_buffer_output (o, p2, ++p - p2); else if (p >= p2 && (*p == '.')) o = variable_buffer_output (o, p2, p - p2); #if defined(WINDOWS32) || defined(__MSDOS__) /* Handle the "d:foobar" case */ else if (p2[0] && p2[1] == ':' && is_dir) o = variable_buffer_output (o, p2, 2); #endif else if (is_dir) #ifdef VMS o = variable_buffer_output (o, "[]", 2); #else #ifndef _AMIGA o = variable_buffer_output (o, "./", 2); #else ; /* Just a nop... */ #endif /* AMIGA */ #endif /* !VMS */ else /* The entire name is the basename. */ o = variable_buffer_output (o, p2, len); o = variable_buffer_output (o, " ", 1); doneany = 1; } if (doneany) /* Kill last space. */ --o; return o; } static char * func_addsuffix_addprefix (o, argv, funcname) char *o; char **argv; const char *funcname; { int fixlen = strlen (argv[0]); char *list_iterator = argv[1]; int is_addprefix = streq (funcname, "addprefix"); int is_addsuffix = !is_addprefix; int doneany = 0; char *p; unsigned int len; while ((p = find_next_token (&list_iterator, &len)) != 0) { if (is_addprefix) o = variable_buffer_output (o, argv[0], fixlen); o = variable_buffer_output (o, p, len); if (is_addsuffix) o = variable_buffer_output (o, argv[0], fixlen); o = variable_buffer_output (o, " ", 1); doneany = 1; } if (doneany) /* Kill last space. */ --o; return o; } static char * func_subst (o, argv, funcname) char *o; char **argv; const char *funcname; { o = subst_expand (o, argv[2], argv[0], argv[1], strlen (argv[0]), strlen (argv[1]), 0, 0); return o; } static char * func_firstword (o, argv, funcname) char *o; char **argv; const char *funcname; { unsigned int i; char *words = argv[0]; /* Use a temp variable for find_next_token */ char *p = find_next_token (&words, &i); if (p != 0) o = variable_buffer_output (o, p, i); return o; } static char * func_words (o, argv, funcname) char *o; char **argv; const char *funcname; { int i = 0; char *word_iterator = argv[0]; char buf[20]; while (find_next_token (&word_iterator, (unsigned int *) 0) != 0) ++i; sprintf (buf, "%d", i); o = variable_buffer_output (o, buf, strlen (buf)); return o; } char * strip_whitespace (begpp, endpp) char **begpp; char **endpp; { while (isspace ((unsigned char)**begpp) && *begpp <= *endpp) (*begpp) ++; while (isspace ((unsigned char)**endpp) && *endpp >= *begpp) (*endpp) --; return *begpp; } int is_numeric (p) char *p; { char *end = p + strlen (p) - 1; char *beg = p; strip_whitespace (&p, &end); while (p <= end) if (!ISDIGIT (*(p++))) /* ISDIGIT only evals its arg once: see make.h. */ return 0; return (end - beg >= 0); } void check_numeric (s, message) char *s; char *message; { if (!is_numeric (s)) fatal (reading_file, message); } static char * func_word (o, argv, funcname) char *o; char **argv; const char *funcname; { char *end_p=0; int i=0; char *p=0; /* Check the first argument. */ check_numeric (argv[0], _("non-numeric first argument to `word' function")); i = atoi (argv[0]); if (i == 0) fatal (reading_file, _("first argument to `word' function must be greater than 0")); end_p = argv[1]; while ((p = find_next_token (&end_p, 0)) != 0) if (--i == 0) break; if (i == 0) o = variable_buffer_output (o, p, end_p - p); return o; } static char * func_wordlist (o, argv, funcname) char *o; char **argv; const char *funcname; { int start, count; /* Check the arguments. */ check_numeric (argv[0], _("non-numeric first argument to `wordlist' function")); check_numeric (argv[1], _("non-numeric second argument to `wordlist' function")); start = atoi (argv[0]); count = atoi (argv[1]) - start + 1; if (count > 0) { char *p; char *end_p = argv[2]; /* Find the beginning of the "start"th word. */ while (((p = find_next_token (&end_p, 0)) != 0) && --start) ; if (p) { /* Find the end of the "count"th word from start. */ while (--count && (find_next_token (&end_p, 0) != 0)) ; /* Return the stuff in the middle. */ o = variable_buffer_output (o, p, end_p - p); } } return o; } static char* func_findstring (o, argv, funcname) char *o; char **argv; const char *funcname; { /* Find the first occurrence of the first string in the second. */ int i = strlen (argv[0]); if (sindex (argv[1], 0, argv[0], i) != 0) o = variable_buffer_output (o, argv[0], i); return o; } static char * func_foreach (o, argv, funcname) char *o; char **argv; const char *funcname; { /* expand only the first two. */ char *varname = expand_argument (argv[0], NULL); char *list = expand_argument (argv[1], NULL); char *body = argv[2]; int doneany = 0; char *list_iterator = list; char *p; unsigned int len; register struct variable *var; push_new_variable_scope (); var = define_variable (varname, strlen (varname), "", o_automatic, 0); /* loop through LIST, put the value in VAR and expand BODY */ while ((p = find_next_token (&list_iterator, &len)) != 0) { char *result = 0; { char save = p[len]; p[len] = '\0'; free (var->value); var->value = (char *) xstrdup ((char*) p); p[len] = save; } result = allocated_variable_expand (body); o = variable_buffer_output (o, result, strlen (result)); o = variable_buffer_output (o, " ", 1); doneany = 1; free (result); } if (doneany) /* Kill the last space. */ --o; pop_variable_scope (); free (varname); free (list); return o; } struct a_word { struct a_word *next; char *str; int matched; }; static char * func_filter_filterout (o, argv, funcname) char *o; char **argv; const char *funcname; { struct a_word *wordhead = 0; struct a_word *wordtail = 0; int is_filter = streq (funcname, "filter"); char *patterns = argv[0]; char *word_iterator = argv[1]; char *p; unsigned int len; /* Chop ARGV[1] up into words and then run each pattern through. */ while ((p = find_next_token (&word_iterator, &len)) != 0) { struct a_word *w = (struct a_word *)alloca (sizeof (struct a_word)); if (wordhead == 0) wordhead = w; else wordtail->next = w; wordtail = w; if (*word_iterator != '\0') ++word_iterator; p[len] = '\0'; w->str = p; w->matched = 0; } if (wordhead != 0) { char *pat_iterator = patterns; int doneany = 0; struct a_word *wp; wordtail->next = 0; /* Run each pattern through the words, killing words. */ while ((p = find_next_token (&pat_iterator, &len)) != 0) { char *percent; char save = p[len]; p[len] = '\0'; percent = find_percent (p); for (wp = wordhead; wp != 0; wp = wp->next) wp->matched |= (percent == 0 ? streq (p, wp->str) : pattern_matches (p, percent, wp->str)); p[len] = save; } /* Output the words that matched (or didn't, for filter-out). */ for (wp = wordhead; wp != 0; wp = wp->next) if (is_filter ? wp->matched : !wp->matched) { o = variable_buffer_output (o, wp->str, strlen (wp->str)); o = variable_buffer_output (o, " ", 1); doneany = 1; } if (doneany) /* Kill the last space. */ --o; } return o; } static char * func_strip (o, argv, funcname) char *o; char **argv; const char *funcname; { char *p = argv[0]; int doneany =0; while (*p != '\0') { int i=0; char *word_start=0; while (isspace ((unsigned char)*p)) ++p; word_start = p; for (i=0; *p != '\0' && !isspace ((unsigned char)*p); ++p, ++i) {} if (!i) break; o = variable_buffer_output (o, word_start, i); o = variable_buffer_output (o, " ", 1); doneany = 1; } if (doneany) /* Kill the last space. */ --o; return o; } /* Print a warning or fatal message. */ static char * func_error (o, argv, funcname) char *o; char **argv; const char *funcname; { char **argvp; char *msg, *p; int len; /* The arguments will be broken on commas. Rather than create yet another special case where function arguments aren't broken up, just create a format string that puts them back together. */ for (len=0, argvp=argv; *argvp != 0; ++argvp) len += strlen (*argvp) + 2; p = msg = alloca (len + 1); for (argvp=argv; argvp[1] != 0; ++argvp) { strcpy (p, *argvp); p += strlen (*argvp); *(p++) = ','; *(p++) = ' '; } strcpy (p, *argvp); if (*funcname == 'e') fatal (reading_file, "%s", msg); /* The warning function expands to the empty string. */ error (reading_file, "%s", msg); return o; } /* chop argv[0] into words, and sort them. */ static char * func_sort (o, argv, funcname) char *o; char **argv; const char *funcname; { char **words = 0; int nwords = 0; register int wordi = 0; /* Chop ARGV[0] into words and put them in WORDS. */ char *t = argv[0]; char *p; unsigned int len; int i; while ((p = find_next_token (&t, &len)) != 0) { if (wordi >= nwords - 1) { nwords = (2 * nwords) + 5; words = (char **) xrealloc ((char *) words, nwords * sizeof (char *)); } words[wordi++] = savestring (p, len); } if (!wordi) return o; /* Now sort the list of words. */ qsort ((char *) words, wordi, sizeof (char *), alpha_compare); /* Now write the sorted list. */ for (i = 0; i < wordi; ++i) { len = strlen (words[i]); if (i == wordi - 1 || strlen (words[i + 1]) != len || strcmp (words[i], words[i + 1])) { o = variable_buffer_output (o, words[i], len); o = variable_buffer_output (o, " ", 1); } free (words[i]); } /* Kill the last space. */ --o; free (words); return o; } /* $(if condition,true-part[,false-part]) CONDITION is false iff it evaluates to an empty string. White space before and after condition are stripped before evaluation. If CONDITION is true, then TRUE-PART is evaluated, otherwise FALSE-PART is evaluated (if it exists). Because only one of the two PARTs is evaluated, you can use $(if ...) to create side-effects (with $(shell ...), for example). */ static char * func_if (o, argv, funcname) char *o; char **argv; const char *funcname; { char *begp = argv[0]; char *endp = begp + strlen (argv[0]); int result = 0; /* Find the result of the condition: if we have a value, and it's not empty, the condition is true. If we don't have a value, or it's the empty string, then it's false. */ strip_whitespace (&begp, &endp); if (begp < endp) { char *expansion = expand_argument (begp, NULL); result = strlen (expansion); free (expansion); } /* If the result is true (1) we want to eval the first argument, and if it's false (0) we want to eval the second. If the argument doesn't exist we do nothing, otherwise expand it and add to the buffer. */ argv += 1 + !result; if (argv[0]) { char *expansion; expansion = expand_argument (argv[0], NULL); o = variable_buffer_output (o, expansion, strlen (expansion)); free (expansion); } return o; } static char * func_wildcard (o, argv, funcname) char *o; char **argv; const char *funcname; { #ifdef _AMIGA o = wildcard_expansion (argv[0], o); #else char *p = string_glob (argv[0]); o = variable_buffer_output (o, p, strlen (p)); #endif return o; } /* \r is replaced on UNIX as well. Is this desirable? */ void fold_newlines (buffer, length) char *buffer; int *length; { char *dst = buffer; char *src = buffer; char *last_nonnl = buffer -1; src[*length] = 0; for (; *src != '\0'; ++src) { if (src[0] == '\r' && src[1] == '\n') continue; if (*src == '\n') { *dst++ = ' '; } else { last_nonnl = dst; *dst++ = *src; } } *(++last_nonnl) = '\0'; *length = last_nonnl - buffer; } int shell_function_pid = 0, shell_function_completed; #ifdef WINDOWS32 /*untested*/ #include #include #include "sub_proc.h" void windows32_openpipe (int *pipedes, int *pid_p, char **command_argv, char **envp) { SECURITY_ATTRIBUTES saAttr; HANDLE hIn; HANDLE hErr; HANDLE hChildOutRd; HANDLE hChildOutWr; HANDLE hProcess; saAttr.nLength = sizeof (SECURITY_ATTRIBUTES); saAttr.bInheritHandle = TRUE; saAttr.lpSecurityDescriptor = NULL; if (DuplicateHandle (GetCurrentProcess(), GetStdHandle(STD_INPUT_HANDLE), GetCurrentProcess(), &hIn, 0, TRUE, DUPLICATE_SAME_ACCESS) == FALSE) { fatal (NILF, _("create_child_process: DuplicateHandle(In) failed (e=%d)\n"), GetLastError()); } if (DuplicateHandle(GetCurrentProcess(), GetStdHandle(STD_ERROR_HANDLE), GetCurrentProcess(), &hErr, 0, TRUE, DUPLICATE_SAME_ACCESS) == FALSE) { fatal (NILF, _("create_child_process: DuplicateHandle(Err) failed (e=%d)\n"), GetLastError()); } if (!CreatePipe(&hChildOutRd, &hChildOutWr, &saAttr, 0)) fatal (NILF, _("CreatePipe() failed (e=%d)\n"), GetLastError()); hProcess = process_init_fd(hIn, hChildOutWr, hErr); if (!hProcess) fatal (NILF, _("windows32_openpipe (): process_init_fd() failed\n")); /* make sure that CreateProcess() has Path it needs */ sync_Path_environment(); if (!process_begin(hProcess, command_argv, envp, command_argv[0], NULL)) { /* register process for wait */ process_register(hProcess); /* set the pid for returning to caller */ *pid_p = (int) hProcess; /* set up to read data from child */ pipedes[0] = _open_osfhandle((long) hChildOutRd, O_RDONLY); /* this will be closed almost right away */ pipedes[1] = _open_osfhandle((long) hChildOutWr, O_APPEND); } else { /* reap/cleanup the failed process */ process_cleanup(hProcess); /* close handles which were duplicated, they weren't used */ CloseHandle(hIn); CloseHandle(hErr); /* close pipe handles, they won't be used */ CloseHandle(hChildOutRd); CloseHandle(hChildOutWr); /* set status for return */ pipedes[0] = pipedes[1] = -1; *pid_p = -1; } } #endif #ifdef __MSDOS__ FILE * msdos_openpipe (int* pipedes, int *pidp, char *text) { FILE *fpipe=0; /* MSDOS can't fork, but it has `popen'. */ struct variable *sh = lookup_variable ("SHELL", 5); int e; extern int dos_command_running, dos_status; /* Make sure not to bother processing an empty line. */ while (isblank ((unsigned char)*text)) ++text; if (*text == '\0') return 0; if (sh) { char buf[PATH_MAX + 7]; /* This makes sure $SHELL value is used by $(shell), even though the target environment is not passed to it. */ sprintf (buf, "SHELL=%s", sh->value); putenv (buf); } e = errno; errno = 0; dos_command_running = 1; dos_status = 0; /* If dos_status becomes non-zero, it means the child process was interrupted by a signal, like SIGINT or SIGQUIT. See fatal_error_signal in commands.c. */ fpipe = popen (text, "rt"); dos_command_running = 0; if (!fpipe || dos_status) { pipedes[0] = -1; *pidp = -1; if (dos_status) errno = EINTR; else if (errno == 0) errno = ENOMEM; shell_function_completed = -1; } else { pipedes[0] = fileno (fpipe); *pidp = 42; /* Yes, the Meaning of Life, the Universe, and Everything! */ errno = e; shell_function_completed = 1; } return fpipe; } #endif /* Do shell spawning, with the naughty bits for different OSes. */ #ifdef VMS /* VMS can't do $(shell ...) */ #define func_shell 0 #else #ifndef _AMIGA static char * func_shell (o, argv, funcname) char *o; char **argv; const char *funcname; { char* batch_filename = NULL; int i; #ifdef __MSDOS__ FILE *fpipe; #endif char **command_argv; char *error_prefix; char **envp; int pipedes[2]; int pid; #ifndef __MSDOS__ /* Construct the argument list. */ command_argv = construct_command_argv (argv[0], (char **) NULL, (struct file *) 0, &batch_filename); if (command_argv == 0) return o; #endif /* Using a target environment for `shell' loses in cases like: export var = $(shell echo foobie) because target_environment hits a loop trying to expand $(var) to put it in the environment. This is even more confusing when var was not explicitly exported, but just appeared in the calling environment. */ envp = environ; /* For error messages. */ if (reading_file != 0) { error_prefix = (char *) alloca (strlen (reading_file->filenm)+11+4); sprintf (error_prefix, "%s:%lu: ", reading_file->filenm, reading_file->lineno); } else error_prefix = ""; #ifdef WINDOWS32 windows32_openpipe (pipedes, &pid, command_argv, envp); if (pipedes[0] < 0) { /* open of the pipe failed, mark as failed execution */ shell_function_completed = -1; return o; } else #else /* WINDOWS32 */ # ifdef __MSDOS__ fpipe = msdos_openpipe (pipedes, &pid, argv[0]); if (pipedes[0] < 0) { perror_with_name (error_prefix, "pipe"); return o; } # else if (pipe (pipedes) < 0) { perror_with_name (error_prefix, "pipe"); return o; } pid = vfork (); if (pid < 0) perror_with_name (error_prefix, "fork"); else if (pid == 0) child_execute_job (0, pipedes[1], command_argv, envp); else # endif /* ! __MSDOS__ */ #endif /* WINDOWS32 */ { /* We are the parent. */ char *buffer; unsigned int maxlen; int cc; /* Record the PID for reap_children. */ shell_function_pid = pid; #ifndef __MSDOS__ shell_function_completed = 0; /* Free the storage only the child needed. */ free (command_argv[0]); free ((char *) command_argv); /* Close the write side of the pipe. */ (void) close (pipedes[1]); #endif /* Set up and read from the pipe. */ maxlen = 200; buffer = (char *) xmalloc (maxlen + 1); /* Read from the pipe until it gets EOF. */ i = 0; do { if (i == maxlen) { maxlen += 512; buffer = (char *) xrealloc (buffer, maxlen + 1); } errno = 0; cc = read (pipedes[0], &buffer[i], maxlen - i); if (cc > 0) i += cc; } while (cc > 0 || EINTR_SET); buffer[i] = '\0'; /* Close the read side of the pipe. */ #ifdef __MSDOS__ if (fpipe) (void) pclose (fpipe); #else (void) close (pipedes[0]); #endif /* Loop until child_handler sets shell_function_completed to the status of our child shell. */ while (shell_function_completed == 0) reap_children (1, 0); if (batch_filename) { DB (DB_VERBOSE, (_("Cleaning up temporary batch file %s\n"), batch_filename)); remove (batch_filename); free (batch_filename); } shell_function_pid = 0; /* The child_handler function will set shell_function_completed to 1 when the child dies normally, or to -1 if it dies with status 127, which is most likely an exec fail. */ if (shell_function_completed == -1) { /* This most likely means that the execvp failed, so we should just write out the error message that came in over the pipe from the child. */ fputs (buffer, stderr); fflush (stderr); } else { /* The child finished normally. Replace all newlines in its output with spaces, and put that in the variable output buffer. */ fold_newlines (buffer, &i); o = variable_buffer_output (o, buffer, i); } free (buffer); } return o; } #else /* _AMIGA */ /* Do the Amiga version of func_shell. */ static char * func_shell (char *o, char **argv, const char *funcname) { /* Amiga can't fork nor spawn, but I can start a program with redirection of my choice. However, this means that we don't have an opportunity to reopen stdout to trap it. Thus, we save our own stdout onto a new descriptor and dup a temp file's descriptor onto our stdout temporarily. After we spawn the shell program, we dup our own stdout back to the stdout descriptor. The buffer reading is the same as above, except that we're now reading from a file. */ #include #include BPTR child_stdout; char tmp_output[FILENAME_MAX]; unsigned int maxlen = 200; int cc, i; char * buffer, * ptr; char ** aptr; int len = 0; char* batch_filename = NULL; /* Construct the argument list. */ command_argv = construct_command_argv (argv[0], (char **) NULL, (struct file *) 0, &batch_filename); if (command_argv == 0) return o; /* Note the mktemp() is a security hole, but this only runs on Amiga. Ideally we would use main.c:open_tmpfile(), but this uses a special Open(), not fopen(), and I'm not familiar enough with the code to mess with it. */ strcpy (tmp_output, "t:MakeshXXXXXXXX"); mktemp (tmp_output); child_stdout = Open (tmp_output, MODE_NEWFILE); for (aptr=command_argv; *aptr; aptr++) len += strlen (*aptr) + 1; buffer = xmalloc (len + 1); ptr = buffer; for (aptr=command_argv; *aptr; aptr++) { strcpy (ptr, *aptr); ptr += strlen (ptr) + 1; *ptr ++ = ' '; *ptr = 0; } ptr[-1] = '\n'; Execute (buffer, NULL, child_stdout); free (buffer); Close (child_stdout); child_stdout = Open (tmp_output, MODE_OLDFILE); buffer = xmalloc (maxlen); i = 0; do { if (i == maxlen) { maxlen += 512; buffer = (char *) xrealloc (buffer, maxlen + 1); } cc = Read (child_stdout, &buffer[i], maxlen - i); if (cc > 0) i += cc; } while (cc > 0); Close (child_stdout); fold_newlines (buffer, &i); o = variable_buffer_output (o, buffer, i); free (buffer); return o; } #endif /* _AMIGA */ #endif /* !VMS */ #ifdef EXPERIMENTAL /* equality. Return is string-boolean, ie, the empty string is false. */ static char * func_eq (char* o, char **argv, char *funcname) { int result = ! strcmp (argv[0], argv[1]); o = variable_buffer_output (o, result ? "1" : "", result); return o; } /* string-boolean not operator. */ static char * func_not (char* o, char **argv, char *funcname) { char * s = argv[0]; int result = 0; while (isspace ((unsigned char)*s)) s++; result = ! (*s); o = variable_buffer_output (o, result ? "1" : "", result); return o; } #endif #define STRING_SIZE_TUPLE(_s) (_s), (sizeof (_s)-1) /* Lookup table for builtin functions. This doesn't have to be sorted; we use a straight lookup. We might gain some efficiency by moving most often used functions to the start of the table. If MAXIMUM_ARGS is 0, that means there is no maximum and all comma-separated values are treated as arguments. EXPAND_ARGS means that all arguments should be expanded before invocation. Functions that do namespace tricks (foreach) don't automatically expand. */ static char *func_call PARAMS ((char *o, char **argv, const char *funcname)); static struct function_table_entry function_table[] = { /* Name/size */ /* MIN MAX EXP? Function */ { STRING_SIZE_TUPLE("addprefix"), 2, 2, 1, func_addsuffix_addprefix}, { STRING_SIZE_TUPLE("addsuffix"), 2, 2, 1, func_addsuffix_addprefix}, { STRING_SIZE_TUPLE("basename"), 0, 1, 1, func_basename_dir}, { STRING_SIZE_TUPLE("dir"), 0, 1, 1, func_basename_dir}, { STRING_SIZE_TUPLE("notdir"), 0, 1, 1, func_notdir_suffix}, { STRING_SIZE_TUPLE("subst"), 3, 3, 1, func_subst}, { STRING_SIZE_TUPLE("suffix"), 0, 1, 1, func_notdir_suffix}, { STRING_SIZE_TUPLE("filter"), 2, 2, 1, func_filter_filterout}, { STRING_SIZE_TUPLE("filter-out"), 2, 2, 1, func_filter_filterout}, { STRING_SIZE_TUPLE("findstring"), 2, 2, 1, func_findstring}, { STRING_SIZE_TUPLE("firstword"), 0, 1, 1, func_firstword}, { STRING_SIZE_TUPLE("join"), 2, 2, 1, func_join}, { STRING_SIZE_TUPLE("patsubst"), 3, 3, 1, func_patsubst}, { STRING_SIZE_TUPLE("shell"), 0, 1, 1, func_shell}, { STRING_SIZE_TUPLE("sort"), 0, 1, 1, func_sort}, { STRING_SIZE_TUPLE("strip"), 0, 1, 1, func_strip}, { STRING_SIZE_TUPLE("wildcard"), 0, 1, 1, func_wildcard}, { STRING_SIZE_TUPLE("word"), 2, 2, 1, func_word}, { STRING_SIZE_TUPLE("wordlist"), 3, 3, 1, func_wordlist}, { STRING_SIZE_TUPLE("words"), 0, 1, 1, func_words}, { STRING_SIZE_TUPLE("origin"), 0, 1, 1, func_origin}, { STRING_SIZE_TUPLE("foreach"), 3, 3, 0, func_foreach}, { STRING_SIZE_TUPLE("call"), 1, 0, 1, func_call}, { STRING_SIZE_TUPLE("error"), 0, 1, 1, func_error}, { STRING_SIZE_TUPLE("warning"), 0, 1, 1, func_error}, { STRING_SIZE_TUPLE("if"), 2, 3, 0, func_if}, #ifdef EXPERIMENTAL { STRING_SIZE_TUPLE("eq"), 2, 2, 1, func_eq}, { STRING_SIZE_TUPLE("not"), 0, 1, 1, func_not}, #endif { 0 } }; /* These must come after the definition of function_table[]. */ static char * expand_builtin_function (o, argc, argv, entry_p) char *o; int argc; char **argv; struct function_table_entry *entry_p; { if (argc < entry_p->minimum_args) fatal (reading_file, _("Insufficient number of arguments (%d) to function `%s'"), argc, entry_p->name); /* I suppose technically some function could do something with no arguments, but so far none do, so just test it for all functions here rather than in each one. We can change it later if necessary. */ if (!argc) return o; if (!entry_p->func_ptr) fatal (reading_file, _("Unimplemented on this platform: function `%s'"), entry_p->name); return entry_p->func_ptr (o, argv, entry_p->name); } /* Check for a function invocation in *STRINGP. *STRINGP points at the opening ( or { and is not null-terminated. If a function invocation is found, expand it into the buffer at *OP, updating *OP, incrementing *STRINGP past the reference and returning nonzero. If not, return zero. */ int handle_function (op, stringp) char **op; char **stringp; { const struct function_table_entry *entry_p; char openparen = (*stringp)[0]; char closeparen = openparen == '(' ? ')' : '}'; char *beg; char *end; int count = 0; register char *p; char **argv, **argvp; int nargs; beg = *stringp + 1; entry_p = lookup_function (function_table, beg); if (!entry_p) return 0; /* We found a builtin function. Find the beginning of its arguments (skip whitespace after the name). */ beg = next_token (beg + entry_p->len); /* Find the end of the function invocation, counting nested use of whichever kind of parens we use. Since we're looking, count commas to get a rough estimate of how many arguments we might have. The count might be high, but it'll never be low. */ for (nargs=1, end=beg; *end != '\0'; ++end) if (*end == ',') ++nargs; else if (*end == openparen) ++count; else if (*end == closeparen && --count < 0) break; if (count >= 0) fatal (reading_file, _("unterminated call to function `%s': missing `%c'"), entry_p->name, closeparen); *stringp = end; /* Get some memory to store the arg pointers. */ argvp = argv = (char **) alloca (sizeof (char *) * (nargs + 2)); /* Chop the string into arguments, then a nul. As soon as we hit MAXIMUM_ARGS (if it's >0) assume the rest of the string is part of the last argument. If we're expanding, store pointers to the expansion of each one. If not, make a duplicate of the string and point into that, nul-terminating each argument. */ if (!entry_p->expand_args) { int len = end - beg; p = xmalloc (len+1); memcpy (p, beg, len); p[len] = '\0'; beg = p; end = beg + len; } for (p=beg, nargs=0; p <= end; ++argvp) { char *next; ++nargs; if (nargs == entry_p->maximum_args || (! (next = find_next_argument (openparen, closeparen, p, end)))) next = end; if (entry_p->expand_args) *argvp = expand_argument (p, next); else { *argvp = p; *next = '\0'; } p = next + 1; } *argvp = NULL; /* Finally! Run the function... */ *op = expand_builtin_function (*op, nargs, argv, entry_p); /* Free memory. */ if (entry_p->expand_args) for (argvp=argv; *argvp != 0; ++argvp) free (*argvp); else free (beg); return 1; } /* User-defined functions. Expand the first argument as either a builtin function or a make variable, in the context of the rest of the arguments assigned to $1, $2, ... $N. $0 is the name of the function. */ static char * func_call (o, argv, funcname) char *o; char **argv; const char *funcname; { char *fname; char *cp; int flen; char *body; int i; const struct function_table_entry *entry_p; /* There is no way to define a variable with a space in the name, so strip leading and trailing whitespace as a favor to the user. */ fname = argv[0]; while (*fname != '\0' && isspace ((unsigned char)*fname)) ++fname; cp = fname + strlen (fname) - 1; while (cp > fname && isspace ((unsigned char)*cp)) --cp; cp[1] = '\0'; /* Calling nothing is a no-op */ if (*fname == '\0') return o; /* Are we invoking a builtin function? */ entry_p = lookup_function (function_table, fname); if (entry_p) { /* How many arguments do we have? */ for (i=0; argv[i+1]; ++i) ; return expand_builtin_function (o, i, argv+1, entry_p); } /* Not a builtin, so the first argument is the name of a variable to be expanded and interpreted as a function. Create the variable reference. */ flen = strlen (fname); body = alloca (flen + 4); body[0] = '$'; body[1] = '('; memcpy (body + 2, fname, flen); body[flen+2] = ')'; body[flen+3] = '\0'; /* Set up arguments $(1) .. $(N). $(0) is the function name. */ push_new_variable_scope (); for (i=0; *argv; ++i, ++argv) { char num[11]; sprintf (num, "%d", i); define_variable (num, strlen (num), *argv, o_automatic, 1); } /* Expand the body in the context of the arguments, adding the result to the variable buffer. */ o = variable_expand_string (o, body, flen+3); pop_variable_scope (); return o + strlen (o); }