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Diffstat (limited to 'ar.c')
| -rw-r--r-- | ar.c | 328 |
1 files changed, 328 insertions, 0 deletions
@@ -0,0 +1,328 @@ +/* Interface to 'ar' archives for GNU Make. +Copyright (C) 1988-2014 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 3 of the License, 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 +this program. If not, see <http://www.gnu.org/licenses/>. */ + +#include "makeint.h" + +#ifndef NO_ARCHIVES + +#include "filedef.h" +#include "dep.h" +#include <fnmatch.h> + +/* Return nonzero if NAME is an archive-member reference, zero if not. An + archive-member reference is a name like 'lib(member)' where member is a + non-empty string. + If a name like 'lib((entry))' is used, a fatal error is signaled at + the attempt to use this unsupported feature. */ + +int +ar_name (const char *name) +{ + const char *p = strchr (name, '('); + const char *end; + + if (p == 0 || p == name) + return 0; + + end = p + strlen (p) - 1; + if (*end != ')' || end == p + 1) + return 0; + + if (p[1] == '(' && end[-1] == ')') + OS (fatal, NILF, _("attempt to use unsupported feature: '%s'"), name); + + return 1; +} + + +/* Parse the archive-member reference NAME into the archive and member names. + Creates one allocated string containing both names, pointed to by ARNAME_P. + MEMNAME_P points to the member. */ + +void +ar_parse_name (const char *name, char **arname_p, char **memname_p) +{ + char *p; + + *arname_p = xstrdup (name); + p = strchr (*arname_p, '('); + *(p++) = '\0'; + p[strlen (p) - 1] = '\0'; + *memname_p = p; +} + + +/* This function is called by 'ar_scan' to find which member to look at. */ + +/* ARGSUSED */ +static long int +ar_member_date_1 (int desc UNUSED, const char *mem, int truncated, + long int hdrpos UNUSED, long int datapos UNUSED, + long int size UNUSED, long int date, + int uid UNUSED, int gid UNUSED, int mode UNUSED, + const void *name) +{ + return ar_name_equal (name, mem, truncated) ? date : 0; +} + +/* Return the modtime of NAME. */ + +time_t +ar_member_date (const char *name) +{ + char *arname; + char *memname; + long int val; + + ar_parse_name (name, &arname, &memname); + + /* Make sure we know the modtime of the archive itself because we are + likely to be called just before commands to remake a member are run, + and they will change the archive itself. + + But we must be careful not to enter_file the archive itself if it does + not exist, because pattern_search assumes that files found in the data + base exist or can be made. */ + { + struct file *arfile; + arfile = lookup_file (arname); + if (arfile == 0 && file_exists_p (arname)) + arfile = enter_file (strcache_add (arname)); + + if (arfile != 0) + (void) f_mtime (arfile, 0); + } + + val = ar_scan (arname, ar_member_date_1, memname); + + free (arname); + + return (val <= 0 ? (time_t) -1 : (time_t) val); +} + +/* Set the archive-member NAME's modtime to now. */ + +#ifdef VMS +int +ar_touch (const char *name) +{ + O (error, NILF, _("touch archive member is not available on VMS")); + return -1; +} +#else +int +ar_touch (const char *name) +{ + char *arname, *memname; + int val; + + ar_parse_name (name, &arname, &memname); + + /* Make sure we know the modtime of the archive itself before we + touch the member, since this will change the archive modtime. */ + { + struct file *arfile; + arfile = enter_file (strcache_add (arname)); + f_mtime (arfile, 0); + } + + val = 1; + switch (ar_member_touch (arname, memname)) + { + case -1: + OS (error, NILF, _("touch: Archive '%s' does not exist"), arname); + break; + case -2: + OS (error, NILF, _("touch: '%s' is not a valid archive"), arname); + break; + case -3: + perror_with_name ("touch: ", arname); + break; + case 1: + OSS (error, NILF, + _("touch: Member '%s' does not exist in '%s'"), memname, arname); + break; + case 0: + val = 0; + break; + default: + OS (error, NILF, + _("touch: Bad return code from ar_member_touch on '%s'"), name); + } + + free (arname); + + return val; +} +#endif /* !VMS */ + +/* State of an 'ar_glob' run, passed to 'ar_glob_match'. */ + +/* On VMS, (object) modules in libraries do not have suffixes. That is, to + find a match for a pattern, the pattern must not have any suffix. So the + suffix of the pattern is saved and the pattern is stripped (ar_glob). + If there is a match and the match, which is a module name, is added to + the chain, the saved suffix is added back to construct a source filename + (ar_glob_match). */ + +struct ar_glob_state + { + const char *arname; + const char *pattern; +#ifdef VMS + char *suffix; +#endif + unsigned int size; + struct nameseq *chain; + unsigned int n; + }; + +/* This function is called by 'ar_scan' to match one archive + element against the pattern in STATE. */ + +static long int +ar_glob_match (int desc UNUSED, const char *mem, int truncated UNUSED, + long int hdrpos UNUSED, long int datapos UNUSED, + long int size UNUSED, long int date UNUSED, int uid UNUSED, + int gid UNUSED, int mode UNUSED, const void *arg) +{ + struct ar_glob_state *state = (struct ar_glob_state *)arg; + + if (fnmatch (state->pattern, mem, FNM_PATHNAME|FNM_PERIOD) == 0) + { + /* We have a match. Add it to the chain. */ + struct nameseq *new = xcalloc (state->size); +#ifdef VMS + if (state->suffix) + new->name = strcache_add( + concat(5, state->arname, "(", mem, state->suffix, ")")); + else +#endif + new->name = strcache_add(concat(4, state->arname, "(", mem, ")")); + new->next = state->chain; + state->chain = new; + ++state->n; + } + + return 0L; +} + +/* Return nonzero if PATTERN contains any metacharacters. + Metacharacters can be quoted with backslashes if QUOTE is nonzero. */ +static int +glob_pattern_p (const char *pattern, int quote) +{ + const char *p; + int opened = 0; + + for (p = pattern; *p != '\0'; ++p) + switch (*p) + { + case '?': + case '*': + return 1; + + case '\\': + if (quote) + ++p; + break; + + case '[': + opened = 1; + break; + + case ']': + if (opened) + return 1; + break; + } + + return 0; +} + +/* Glob for MEMBER_PATTERN in archive ARNAME. + Return a malloc'd chain of matching elements (or nil if none). */ + +struct nameseq * +ar_glob (const char *arname, const char *member_pattern, unsigned int size) +{ + struct ar_glob_state state; + struct nameseq *n; + const char **names; + unsigned int i; +#ifdef VMS + char *vms_member_pattern; +#endif + if (! glob_pattern_p (member_pattern, 1)) + return 0; + + /* Scan the archive for matches. + ar_glob_match will accumulate them in STATE.chain. */ + state.arname = arname; + state.pattern = member_pattern; +#ifdef VMS + { + /* In a copy of the pattern, find the suffix, save it and remove it from + the pattern */ + char *lastdot; + vms_member_pattern = xstrdup(member_pattern); + lastdot = strrchr(vms_member_pattern, '.'); + state.suffix = lastdot; + if (lastdot) + { + state.suffix = xstrdup(lastdot); + *lastdot = 0; + } + state.pattern = vms_member_pattern; + } +#endif + state.size = size; + state.chain = 0; + state.n = 0; + ar_scan (arname, ar_glob_match, &state); + +#ifdef VMS + /* Deallocate any duplicated string */ + free(vms_member_pattern); + if (state.suffix) + { + free(state.suffix); + } +#endif + + if (state.chain == 0) + return 0; + + /* Now put the names into a vector for sorting. */ + names = alloca (state.n * sizeof (const char *)); + i = 0; + for (n = state.chain; n != 0; n = n->next) + names[i++] = n->name; + + /* Sort them alphabetically. */ + /* MSVC erroneously warns without a cast here. */ + qsort ((void *)names, i, sizeof (*names), alpha_compare); + + /* Put them back into the chain in the sorted order. */ + i = 0; + for (n = state.chain; n != 0; n = n->next) + n->name = names[i++]; + + return state.chain; +} + +#endif /* Not NO_ARCHIVES. */ |