d/freebsd-skq
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
bd58e46f9d
freebsd-skq/usr.bin/make/arch.c

1225 lines
33 KiB
C
Raw Blame History

/*-
* Copyright (c) 1988, 1989, 1990, 1993
* The Regents of the University of California. All rights reserved.
* Copyright (c) 1989 by Berkeley Softworks
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Adam de Boor.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)arch.c 8.2 (Berkeley) 1/2/94
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
/*-
* arch.c --
* Functions to manipulate libraries, archives and their members.
*
* Once again, cacheing/hashing comes into play in the manipulation
* of archives. The first time an archive is referenced, all of its members'
* headers are read and hashed and the archive closed again. All hashed
* archives are kept on a list which is searched each time an archive member
* is referenced.
*
* The interface to this module is:
* Arch_ParseArchive Given an archive specification, return a list
* of GNode's, one for each member in the spec.
* FALSE is returned if the specification is
* invalid for some reason.
*
* Arch_Touch Alter the modification time of the archive
* member described by the given node to be
* the current time.
*
* Arch_TouchLib Update the modification time of the library
* described by the given node. This is special
* because it also updates the modification time
* of the library's table of contents.
*
* Arch_MTime Find the modification time of a member of
* an archive *in the archive*. The time is also
* placed in the member's GNode. Returns the
* modification time.
*
* Arch_MemTime Find the modification time of a member of
* an archive. Called when the member doesn't
* already exist. Looks in the archive for the
* modification time. Returns the modification
* time.
*
* Arch_FindLib Search for a library along a path. The
* library name in the GNode should be in
* -l<name> format.
*
* Arch_LibOODate Special function to decide if a library node
* is out-of-date.
*
* Arch_Init Initialize this module.
*/
#include <sys/param.h>
#include <sys/queue.h>
#include <sys/types.h>
#include <ar.h>
#include <ctype.h>
#include <errno.h>
#include <inttypes.h>
#include <limits.h>
#include <regex.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <utime.h>
#include "arch.h"
#include "buf.h"
#include "config.h"
#include "dir.h"
#include "globals.h"
#include "GNode.h"
#include "hash.h"
#include "make.h"
#include "parse.h"
#include "targ.h"
#include "util.h"
#include "var.h"
typedef struct Arch {
char *name; /* Name of archive */
/*
* All the members of the archive described
* by <name, struct ar_hdr *> key/value pairs
*/
Hash_Table members;
TAILQ_ENTRY(Arch) link; /* link all cached archives */
} Arch;
/* Lst of archives we've already examined */
static TAILQ_HEAD(, Arch) archives = TAILQ_HEAD_INITIALIZER(archives);
/* size of the name field in the archive member header */
#define AR_NAMSIZ sizeof(((struct ar_hdr *)0)->ar_name)
/*
* This structure is used while reading/writing an archive
*/
struct arfile {
FILE *fp; /* archive file */
char *fname; /* name of the file */
struct ar_hdr hdr; /* current header */
char sname[AR_NAMSIZ + 1]; /* short name */
char *member; /* (long) member name */
size_t mlen; /* size of the above */
char *nametab; /* name table */
size_t nametablen; /* size of the table */
int64_t time; /* from ar_date */
uint64_t size; /* from ar_size */
off_t pos; /* header pos of current entry */
};
/*
* Name of the symbol table. The original BSD used "__.SYMDEF". Rumours go
* that this name may have a slash appended sometimes. Actually FreeBSD
* uses "/" which probably came from SVR4.
*/
#define SVR4_RANLIBMAG "/"
#define BSD_RANLIBMAG "__.SYMDEF"
/*
* Name of the filename table. The 4.4BSD ar format did not use this, but
* puts long filenames directly between the member header and the object
* file.
*/
#define SVR4_NAMEMAG "//"
#define BSD_NAMEMAG "ARFILENAMES/"
/*
* 44BSD long filename key. Use a local define here instead of relying
* on ar.h because we want this to continue working even when the
* definition is removed from ar.h.
*/
#define BSD_EXT1 "#1/"
#define BSD_EXT1LEN 3
/* if this is TRUE make archive errors fatal */
Boolean arch_fatal = TRUE;
/**
* ArchError
* An error happend while handling an archive. BSDmake traditionally
* ignored these errors. Now this is dependend on the global arch_fatal
* which, if true, makes these errors fatal and, if false, just emits an
* error message.
*/
#define ArchError(ARGS) do { \
if (arch_fatal) \
Fatal ARGS; \
else \
Error ARGS; \
} while (0)
/*-
*-----------------------------------------------------------------------
* Arch_ParseArchive --
* Parse the archive specification in the given line and find/create
* the nodes for the specified archive members, placing their nodes
* on the given list, given the pointer to the start of the
* specification, a Lst on which to place the nodes, and a context
* in which to expand variables.
*
* Results:
* TRUE if it was a valid specification. The linePtr is updated
* to point to the first non-space after the archive spec. The
* nodes for the members are placed on the given list.
*
* Side Effects:
* Some nodes may be created. The given list is extended.
*
*-----------------------------------------------------------------------
*/
Boolean
Arch_ParseArchive(char **linePtr, Lst *nodeLst, GNode *ctxt)
{
char *cp; /* Pointer into line */
GNode *gn; /* New node */
char *libName; /* Library-part of specification */
char *memName; /* Member-part of specification */
char *nameBuf; /* temporary place for node name */
char saveChar; /* Ending delimiter of member-name */
Boolean subLibName; /* TRUE if libName should have/had
* variable substitution performed on it */
libName = *linePtr;
subLibName = FALSE;
for (cp = libName; *cp != '(' && *cp != '\0'; cp++) {
if (*cp == '$') {
/*
* Variable spec, so call the Var module to parse the
* puppy so we can safely advance beyond it...
*/
size_t length = 0;
Boolean freeIt;
char *result;
result = Var_Parse(cp, ctxt, TRUE, &length, &freeIt);
if (result == var_Error) {
return (FALSE);
}
subLibName = TRUE;
if (freeIt) {
free(result);
}
cp += length - 1;
}
}
*cp++ = '\0';
if (subLibName) {
libName = Buf_Peel(Var_Subst(libName, ctxt, TRUE));
}
for (;;) {
/*
* First skip to the start of the member's name, mark that
* place and skip to the end of it (either white-space or
* a close paren).
*/
/*
* TRUE if need to substitute in memName
*/
Boolean doSubst = FALSE;
while (*cp != '\0' && *cp != ')' &&
isspace((unsigned char)*cp)) {
cp++;
}
memName = cp;
while (*cp != '\0' && *cp != ')' &&
!isspace((unsigned char)*cp)) {
if (*cp == '$') {
/*
* Variable spec, so call the Var module to
* parse the puppy so we can safely advance
* beyond it...
*/
size_t length = 0;
Boolean freeIt;
char *result;
result = Var_Parse(cp, ctxt, TRUE,
&length, &freeIt);
if (result == var_Error) {
return (FALSE);
}
doSubst = TRUE;
if (freeIt) {
free(result);
}
cp += length;
} else {
cp++;
}
}
/*
* If the specification ends without a closing parenthesis,
* chances are there's something wrong (like a missing
* backslash), so it's better to return failure than allow
* such things to happen
*/
if (*cp == '\0') {
printf("No closing parenthesis in archive "
"specification\n");
return (FALSE);
}
/*
* If we didn't move anywhere, we must be done
*/
if (cp == memName) {
break;
}
saveChar = *cp;
*cp = '\0';
/*
* XXX: This should be taken care of intelligently by
* SuffExpandChildren, both for the archive and the member
* portions.
*/
/*
* If member contains variables, try and substitute for them.
* This will slow down archive specs with dynamic sources, of
* course, since we'll be (non-)substituting them three times,
* but them's the breaks -- we need to do this since
* SuffExpandChildren calls us, otherwise we could assume the
* thing would be taken care of later.
*/
if (doSubst) {
char *buf;
char *sacrifice;
char *oldMemName = memName;
size_t sz;
Buffer *buf1;
/*
* Now form an archive spec and recurse to deal with
* nested variables and multi-word variable values....
* The results are just placed at the end of the
* nodeLst we're returning.
*/
buf1 = Var_Subst(memName, ctxt, TRUE);
memName = Buf_Data(buf1);
sz = strlen(memName) + strlen(libName) + 3;
buf = emalloc(sz);
snprintf(buf, sz, "%s(%s)", libName, memName);
sacrifice = buf;
if (strchr(memName, '$') &&
strcmp(memName, oldMemName) == 0) {
/*
* Must contain dynamic sources, so we can't
* deal with it now.
* Just create an ARCHV node for the thing and
* let SuffExpandChildren handle it...
*/
gn = Targ_FindNode(buf, TARG_CREATE);
if (gn == NULL) {
free(buf);
Buf_Destroy(buf1, FALSE);
return (FALSE);
}
gn->type |= OP_ARCHV;
Lst_AtEnd(nodeLst, (void *)gn);
} else if (!Arch_ParseArchive(&sacrifice, nodeLst,
ctxt)) {
/*
* Error in nested call -- free buffer and
* return FALSE ourselves.
*/
free(buf);
Buf_Destroy(buf1, FALSE);
return (FALSE);
}
/* Free buffer and continue with our work. */
free(buf);
Buf_Destroy(buf1, FALSE);
} else if (Dir_HasWildcards(memName)) {
Lst members = Lst_Initializer(members);
char *member;
size_t sz = MAXPATHLEN;
size_t nsz;
nameBuf = emalloc(sz);
Path_Expand(memName, &dirSearchPath, &members);
while (!Lst_IsEmpty(&members)) {
member = Lst_DeQueue(&members);
nsz = strlen(libName) + strlen(member) + 3;
if (nsz > sz) {
sz = nsz * 2;
nameBuf = erealloc(nameBuf, sz);
}
snprintf(nameBuf, sz, "%s(%s)",
libName, member);
free(member);
gn = Targ_FindNode(nameBuf, TARG_CREATE);
if (gn == NULL) {
free(nameBuf);
/* XXXHB Lst_Destroy(&members) */
return (FALSE);
}
/*
* We've found the node, but have to make sure
* the rest of the world knows it's an archive
* member, without having to constantly check
* for parentheses, so we type the thing with
* the OP_ARCHV bit before we place it on the
* end of the provided list.
*/
gn->type |= OP_ARCHV;
Lst_AtEnd(nodeLst, gn);
}
free(nameBuf);
} else {
size_t sz = strlen(libName) + strlen(memName) + 3;
nameBuf = emalloc(sz);
snprintf(nameBuf, sz, "%s(%s)", libName, memName);
gn = Targ_FindNode(nameBuf, TARG_CREATE);
free(nameBuf);
if (gn == NULL) {
return (FALSE);
}
/*
* We've found the node, but have to make sure the
* rest of the world knows it's an archive member,
* without having to constantly check for parentheses,
* so we type the thing with the OP_ARCHV bit before
* we place it on the end of the provided list.
*/
gn->type |= OP_ARCHV;
Lst_AtEnd(nodeLst, gn);
}
if (doSubst) {
free(memName);
}
*cp = saveChar;
}
/*
* If substituted libName, free it now, since we need it no longer.
*/
if (subLibName) {
free(libName);
}
/*
* We promised the pointer would be set up at the next non-space, so
* we must advance cp there before setting *linePtr... (note that on
* entrance to the loop, cp is guaranteed to point at a ')')
*/
do {
cp++;
} while (*cp != '\0' && isspace((unsigned char)*cp));
*linePtr = cp;
return (TRUE);
}
/*
* Close an archive file an free all resources
*/
static void
ArchArchiveClose(struct arfile *ar)
{
if (ar->nametab != NULL)
free(ar->nametab);
free(ar->member);
if (ar->fp != NULL) {
if (fclose(ar->fp) == EOF)
ArchError(("%s: close error", ar->fname));
}
free(ar->fname);
free(ar);
}
/*
* Open an archive file.
*/
static struct arfile *
ArchArchiveOpen(const char *archive, const char *mode)
{
struct arfile *ar;
char magic[SARMAG];
ar = emalloc(sizeof(*ar));
ar->fname = estrdup(archive);
ar->mlen = 100;
ar->member = emalloc(ar->mlen);
ar->nametab = NULL;
ar->nametablen = 0;
if ((ar->fp = fopen(ar->fname, mode)) == NULL) {
DEBUGM(ARCH, ("%s", ar->fname));
ArchArchiveClose(ar);
return (NULL);
}
/* read MAGIC */
if (fread(magic, SARMAG, 1, ar->fp) != 1 ||
strncmp(magic, ARMAG, SARMAG) != 0) {
ArchError(("%s: bad archive magic\n", ar->fname));
ArchArchiveClose(ar);
return (NULL);
}
ar->pos = 0;
return (ar);
}
/*
* Read the next header from the archive. The return value will be +1 if
* the header is read successfully, 0 on EOF and -1 if an error happend.
* On a successful return sname contains the truncated member name and
* member the full name. hdr contains the member header. For the symbol table
* names of length 0 are returned. The entry for the file name table is never
* returned.
*/
static int
ArchArchiveNext(struct arfile *ar)
{
char *end;
int have_long_name;
u_long offs;
char *ptr;
size_t ret;
char buf[MAX(sizeof(ar->hdr.ar_size), sizeof(ar->hdr.ar_date)) + 1];
next:
/*
* Seek to the next header.
*/
if (ar->pos == 0) {
ar->pos = SARMAG;
} else {
ar->pos += sizeof(ar->hdr) + ar->size;
if (ar->size % 2 == 1)
ar->pos++;
}
if (fseeko(ar->fp, ar->pos, SEEK_SET) == -1) {
ArchError(("%s: cannot seek to %jd: %s", ar->fname,
(intmax_t)ar->pos, strerror(errno)));
return (-1);
}
/*
* Read next member header
*/
ret = fread(&ar->hdr, sizeof(ar->hdr), 1, ar->fp);
if (ret != 1) {
if (feof(ar->fp))
return (0);
ArchError(("%s: error reading member header: %s", ar->fname,
strerror(errno)));
return (-1);
}
if (strncmp(ar->hdr.ar_fmag, ARFMAG, sizeof(ar->hdr.ar_fmag)) != 0) {
ArchError(("%s: bad entry magic", ar->fname));
return (-1);
}
/*
* looks like a member - get name by stripping trailing spaces
* and NUL terminating.
*/
strlcpy(ar->sname, ar->hdr.ar_name, AR_NAMSIZ + 1);
for (ptr = ar->sname + AR_NAMSIZ; ptr > ar->sname; ptr--)
if (ptr[-1] != ' ')
break;
*ptr = '\0';
/*
* Parse the size. All entries need to have a size. Be careful
* to not allow buffer overruns.
*/
strlcpy(buf, ar->hdr.ar_size, sizeof(ar->hdr.ar_size) + 1);
errno = 0;
ar->size = strtoumax(buf, &end, 10);
if (errno != 0 || strspn(end, " ") != strlen(end)) {
ArchError(("%s: bad size format in archive '%s'",
ar->fname, buf));
return (-1);
}
/*
* Look for the extended name table. Do this before parsing
* the date because this table doesn't need a date.
*/
if (strcmp(ar->sname, BSD_NAMEMAG) == 0 ||
strcmp(ar->sname, SVR4_NAMEMAG) == 0) {
/* filename table - read it in */
ar->nametablen = ar->size;
ar->nametab = emalloc(ar->nametablen);
ret = fread(ar->nametab, 1, ar->nametablen, ar->fp);
if (ret != ar->nametablen) {
if (ferror(ar->fp)) {
ArchError(("%s: cannot read nametab: %s",
ar->fname, strerror(errno)));
} else {
ArchError(("%s: cannot read nametab: "
"short read", ar->fname, strerror(errno)));
}
return (-1);
}
/*
* NUL terminate the entries. Entries are \n terminated
* and may have a trailing / or \.
*/
ptr = ar->nametab;
while (ptr < ar->nametab + ar->nametablen) {
if (*ptr == '\n') {
if (ptr[-1] == '/' || ptr[-1] == '\\')
ptr[-1] = '\0';
*ptr = '\0';
}
ptr++;
}
/* get next archive entry */
goto next;
}
/*
* Now parse the modification date. Be careful to not overrun
* buffers.
*/
strlcpy(buf, ar->hdr.ar_date, sizeof(ar->hdr.ar_date) + 1);
errno = 0;
ar->time = (int64_t)strtoll(buf, &end, 10);
if (errno != 0 || strspn(end, " ") != strlen(end)) {
ArchError(("%s: bad date format in archive '%s'",
ar->fname, buf));
return (-1);
}
/*
* Now check for the symbol table. This should really be the first
* entry, but we don't check this.
*/
if (strcmp(ar->sname, BSD_RANLIBMAG) == 0 ||
strcmp(ar->sname, SVR4_RANLIBMAG) == 0) {
/* symbol table - return a zero length name */
ar->member[0] = '\0';
ar->sname[0] = '\0';
return (1);
}
have_long_name = 0;
/*
* Look whether this is a long name. There are several variants
* of long names:
* "#1/12 " - 12 length of following filename
* "/17 " - index into name table
* " 17 " - index into name table
* Note that in the last case we must also check that there is no
* slash in the name because of filenames with leading spaces:
* " 777.o/ " - filename 777.o
*/
if (ar->sname[0] == '/' || (ar->sname[0] == ' ' &&
strchr(ar->sname, '/') == NULL)) {
/* SVR4 extended name */
errno = 0;
offs = strtoul(ar->sname + 1, &end, 10);
if (errno != 0 || *end != '\0' || offs >= ar->nametablen ||
end == ar->sname + 1) {
ArchError(("%s: bad extended name '%s'", ar->fname,
ar->sname));
return (-1);
}
/* fetch the name */
if (ar->mlen <= strlen(ar->nametab + offs)) {
ar->mlen = strlen(ar->nametab + offs) + 1;
ar->member = erealloc(ar->member, ar->mlen);
}
strcpy(ar->member, ar->nametab + offs);
have_long_name = 1;
} else if (strncmp(ar->sname, BSD_EXT1, BSD_EXT1LEN) == 0 &&
isdigit(ar->sname[BSD_EXT1LEN])) {
/* BSD4.4 extended name */
errno = 0;
offs = strtoul(ar->sname + BSD_EXT1LEN, &end, 10);
if (errno != 0 || *end != '\0' ||
end == ar->sname + BSD_EXT1LEN) {
ArchError(("%s: bad extended name '%s'", ar->fname,
ar->sname));
return (-1);
}
/* read it from the archive */
if (ar->mlen <= offs) {
ar->mlen = offs + 1;
ar->member = erealloc(ar->member, ar->mlen);
}
ret = fread(ar->member, 1, offs, ar->fp);
if (ret != offs) {
if (ferror(ar->fp)) {
ArchError(("%s: reading extended name: %s",
ar->fname, strerror(errno)));
} else {
ArchError(("%s: reading extended name: "
"short read", ar->fname));
}
return (-1);
}
ar->member[offs] = '\0';
have_long_name = 1;
}
/*
* Now remove the trailing slash that Svr4 puts at
* the end of the member name to support trailing spaces in names.
*/
if (ptr > ar->sname && ptr[-1] == '/')
*--ptr = '\0';
if (!have_long_name) {
if (strlen(ar->sname) >= ar->mlen) {
ar->mlen = strlen(ar->sname) + 1;
ar->member = erealloc(ar->member, ar->mlen);
}
strcpy(ar->member, ar->sname);
}
return (1);
}
/*
* Touch the current archive member by writing a new header with an
* updated timestamp. The return value is 0 for success and -1 for errors.
*/
static int
ArchArchiveTouch(struct arfile *ar, int64_t ts)
{
/* seek to our header */
if (fseeko(ar->fp, ar->pos, SEEK_SET) == -1) {
ArchError(("%s: cannot seek to %jd: %s", ar->fname,
(intmax_t)ar->pos, strerror(errno)));
return (-1);
}
/*
* change timestamp, be sure to not NUL-terminated it, but
* to fill with spaces.
*/
snprintf(ar->hdr.ar_date, sizeof(ar->hdr.ar_date), "%jd",
(intmax_t)ts);
memset(ar->hdr.ar_date + strlen(ar->hdr.ar_date),
' ', sizeof(ar->hdr.ar_date) - strlen(ar->hdr.ar_date));
if (fwrite(&ar->hdr, sizeof(ar->hdr), 1, ar->fp) != 1) {
ArchError(("%s: cannot touch: %s", ar->fname, strerror(errno)));
return (-1);
}
return (0);
}
/*-
*-----------------------------------------------------------------------
* ArchFindMember --
* Locate a member of an archive, given the path of the archive and
* the path of the desired member. If the archive is to be modified,
* the mode should be "r+", if not, it should be "r". The archive
* file is returned positioned at the correct header.
*
* Results:
* A struct arfile *, opened for reading and, possibly writing,
* positioned at the member's header, or NULL if the member was
* nonexistent.
*
*-----------------------------------------------------------------------
*/
static struct arfile *
ArchFindMember(const char *archive, const char *member, const char *mode)
{
struct arfile *ar;
const char *cp; /* Useful character pointer */
if ((ar = ArchArchiveOpen(archive, mode)) == NULL)
return (NULL);
/*
* Because of space constraints and similar things, files are archived
* using their final path components, not the entire thing, so we need
* to point 'member' to the final component, if there is one, to make
* the comparisons easier...
*/
if (member != NULL) {
cp = strrchr(member, '/');
if (cp != NULL) {
member = cp + 1;
}
}
while (ArchArchiveNext(ar) > 0) {
/*
* When comparing there are actually three cases:
* (1) the name fits into the limit og af_name,
* (2) the name is longer and the archive supports long names,
* (3) the name is longer and the archive doesn't support long
* names.
* Because we don't know whether the archive supports long
* names or not we need to be carefull.
*/
if (member == NULL) {
/* special case - symbol table */
if (ar->member[0] == '\0')
return (ar);
} else if (strlen(member) <= AR_NAMSIZ) {
/* case (1) */
if (strcmp(ar->member, member) == 0)
return (ar);
} else if (strcmp(ar->member, member) == 0) {
/* case (3) */
return (ar);
} else {
/* case (2) */
if (strlen(ar->member) == AR_NAMSIZ &&
strncmp(member, ar->member, AR_NAMSIZ) == 0)
return (ar);
}
}
/* not found */
ArchArchiveClose(ar);
return (NULL);
}
/*-
*-----------------------------------------------------------------------
* ArchStatMember --
* Locate a member of an archive, given the path of the archive and
* the path of the desired member, and a boolean representing whether
* or not the archive should be hashed (if not already hashed).
*
* Results:
* A pointer to the current struct ar_hdr structure for the member. Note
* That no position is returned, so this is not useful for touching
* archive members. This is mostly because we have no assurances that
* The archive will remain constant after we read all the headers, so
* there's not much point in remembering the position...
*
* Side Effects:
*
*-----------------------------------------------------------------------
*/
static int64_t
ArchStatMember(const char *archive, const char *member, Boolean hash)
{
struct arfile *arf;
int64_t ret;
int t;
char *cp; /* Useful character pointer */
Arch *ar; /* Archive descriptor */
Hash_Entry *he; /* Entry containing member's description */
char copy[AR_NAMSIZ + 1];
/*
* Because of space constraints and similar things, files are archived
* using their final path components, not the entire thing, so we need
* to point 'member' to the final component, if there is one, to make
* the comparisons easier...
*/
if (member != NULL) {
cp = strrchr(member, '/');
if (cp != NULL)
member = cp + 1;
}
TAILQ_FOREACH(ar, &archives, link) {
if (strcmp(archive, ar->name) == 0)
break;
}
if (ar == NULL) {
/* archive not found */
if (!hash) {
/*
* Caller doesn't want the thing hashed, just use
* ArchFindMember to read the header for the member
* out and close down the stream again.
*/
arf = ArchFindMember(archive, member, "r");
if (arf == NULL) {
return (INT64_MIN);
}
ret = arf->time;
ArchArchiveClose(arf);
return (ret);
}
/*
* We don't have this archive on the list yet, so we want to
* find out everything that's in it and cache it so we can get
* at it quickly.
*/
arf = ArchArchiveOpen(archive, "r");
if (arf == NULL) {
return (INT64_MIN);
}
/* create archive data structure */
ar = emalloc(sizeof(*ar));
ar->name = estrdup(archive);
Hash_InitTable(&ar->members, -1);
while ((t = ArchArchiveNext(arf)) > 0) {
he = Hash_CreateEntry(&ar->members, arf->member, NULL);
Hash_SetValue(he, emalloc(sizeof(int64_t)));
*(int64_t *)Hash_GetValue(he) = arf->time;
}
ArchArchiveClose(arf);
if (t < 0) {
/* error happend - throw away everything */
Hash_DeleteTable(&ar->members);
free(ar->name);
free(ar);
return (INT64_MIN);
}
TAILQ_INSERT_TAIL(&archives, ar, link);
}
/*
* Now that the archive has been read and cached, we can look into
* the hash table to find the desired member's header.
*/
he = Hash_FindEntry(&ar->members, member);
if (he != NULL)
return (*(int64_t *)Hash_GetValue (he));
if (member != NULL && strlen(member) > AR_NAMSIZ) {
/* Try truncated name */
strlcpy(copy, member, AR_NAMSIZ + 1);
if ((he = Hash_FindEntry(&ar->members, copy)) != NULL)
return (*(int64_t *)Hash_GetValue(he));
}
return (INT64_MIN);
}
/*-
*-----------------------------------------------------------------------
* Arch_Touch --
* Touch a member of an archive.
*
* Results:
* The 'time' field of the member's header is updated.
*
* Side Effects:
* The modification time of the entire archive is also changed.
* For a library, this could necessitate the re-ranlib'ing of the
* whole thing.
*
*-----------------------------------------------------------------------
*/
void
Arch_Touch(GNode *gn)
{
struct arfile *ar;
ar = ArchFindMember(Var_Value(ARCHIVE, gn),
Var_Value(TARGET, gn), "r+");
if (ar != NULL) {
ArchArchiveTouch(ar, (int64_t)now);
ArchArchiveClose(ar);
}
}
/*-
*-----------------------------------------------------------------------
* Arch_TouchLib --
* Given a node which represents a library, touch the thing, making
* sure that the table of contents also is touched.
*
* Results:
* None.
*
* Side Effects:
* Both the modification time of the library and of the RANLIBMAG
* member are set to 'now'.
*
*-----------------------------------------------------------------------
*/
void
Arch_TouchLib(GNode *gn)
{
struct arfile *ar; /* Open archive */
struct utimbuf times; /* Times for utime() call */
ar = ArchFindMember(gn->path, NULL, "r+");
if (ar != NULL) {
ArchArchiveTouch(ar, (int64_t)now);
ArchArchiveClose(ar);
times.actime = times.modtime = now;
utime(gn->path, &times);
}
}
/*-
*-----------------------------------------------------------------------
* Arch_MTime --
* Return the modification time of a member of an archive, given its
* name.
*
* Results:
* The modification time(seconds).
* XXXHB this should be a long.
*
* Side Effects:
* The mtime field of the given node is filled in with the value
* returned by the function.
*
*-----------------------------------------------------------------------
*/
int
Arch_MTime(GNode *gn)
{
int64_t mtime;
mtime = ArchStatMember(Var_Value(ARCHIVE, gn),
Var_Value(TARGET, gn), TRUE);
if (mtime == INT_MIN) {
mtime = 0;
}
gn->mtime = (int)mtime; /* XXX */
return (gn->mtime);
}
/*-
*-----------------------------------------------------------------------
* Arch_MemMTime --
* Given a non-existent archive member's node, get its modification
* time from its archived form, if it exists.
*
* Results:
* The modification time.
*
* Side Effects:
* The mtime field is filled in.
*
*-----------------------------------------------------------------------
*/
int
Arch_MemMTime(GNode *gn)
{
LstNode *ln;
GNode *pgn;
char *nameStart;
char *nameEnd;
for (ln = Lst_First(&gn->parents); ln != NULL; ln = Lst_Succ(ln)) {
pgn = Lst_Datum(ln);
if (pgn->type & OP_ARCHV) {
/*
* If the parent is an archive specification and is
* being made and its member's name matches the name of
* the node we were given, record the modification time
* of the parent in the child. We keep searching its
* parents in case some other parent requires this
* child to exist...
*/
nameStart = strchr(pgn->name, '(') + 1;
nameEnd = strchr(nameStart, ')');
if (pgn->make && strncmp(nameStart, gn->name,
nameEnd - nameStart) == 0) {
gn->mtime = Arch_MTime(pgn);
}
} else if (pgn->make) {
/*
* Something which isn't a library depends on the
* existence of this target, so it needs to exist.
*/
gn->mtime = 0;
break;
}
}
return (gn->mtime);
}
/*-
*-----------------------------------------------------------------------
* Arch_FindLib --
* Search for a named library along the given search path.
*
* Results:
* None.
*
* Side Effects:
* The node's 'path' field is set to the found path (including the
* actual file name, not -l...). If the system can handle the -L
* flag when linking (or we cannot find the library), we assume that
* the user has placed the .LIBRARIES variable in the final linking
* command (or the linker will know where to find it) and set the
* TARGET variable for this node to be the node's name. Otherwise,
* we set the TARGET variable to be the full path of the library,
* as returned by Dir_FindFile.
*
*-----------------------------------------------------------------------
*/
void
Arch_FindLib(GNode *gn, struct Path *path)
{
char *libName; /* file name for archive */
size_t sz;
sz = strlen(gn->name) + 4;
libName = emalloc(sz);
snprintf(libName, sz, "lib%s.a", &gn->name[2]);
gn->path = Path_FindFile(libName, path);
free(libName);
#ifdef LIBRARIES
Var_Set(TARGET, gn->name, gn);
#else
Var_Set(TARGET, gn->path == NULL ? gn->name : gn->path, gn);
#endif /* LIBRARIES */
}
/*-
*-----------------------------------------------------------------------
* Arch_LibOODate --
* Decide if a node with the OP_LIB attribute is out-of-date. Called
* from Make_OODate to make its life easier, with the library's
* graph node.
*
* There are several ways for a library to be out-of-date that are
* not available to ordinary files. In addition, there are ways
* that are open to regular files that are not available to
* libraries. A library that is only used as a source is never
* considered out-of-date by itself. This does not preclude the
* library's modification time from making its parent be out-of-date.
* A library will be considered out-of-date for any of these reasons,
* given that it is a target on a dependency line somewhere:
* Its modification time is less than that of one of its
* sources (gn->mtime < gn->cmtime).
* Its modification time is greater than the time at which the
* make began (i.e. it's been modified in the course
* of the make, probably by archiving).
* The modification time of one of its sources is greater than
* the one of its RANLIBMAG member (i.e. its table of contents
* is out-of-date). We don't compare of the archive time
* vs. TOC time because they can be too close. In my
* opinion we should not bother with the TOC at all since
* this is used by 'ar' rules that affect the data contents
* of the archive, not by ranlib rules, which affect the
* TOC.
*
* Results:
* TRUE if the library is out-of-date. FALSE otherwise.
*
* Side Effects:
* The library will be hashed if it hasn't been already.
*
*-----------------------------------------------------------------------
*/
Boolean
Arch_LibOODate(GNode *gn)
{
int64_t mtime; /* The table-of-contents's mod time */
if (OP_NOP(gn->type) && Lst_IsEmpty(&gn->children)) {
return (FALSE);
}
if (gn->mtime > now || gn->mtime < gn->cmtime) {
return (TRUE);
}
mtime = ArchStatMember(gn->path, NULL, FALSE);
if (mtime == INT64_MIN) {
/*
* Not found. A library w/o a table of contents is out-of-date
*/
if (DEBUG(ARCH) || DEBUG(MAKE)) {
Debug("No TOC...");
}
return (TRUE);
}
/* XXX choose one. */
if (DEBUG(ARCH) || DEBUG(MAKE)) {
Debug("TOC modified %s...", Targ_FmtTime(mtime));
}
return (gn->cmtime > mtime);
}
Reference in New Issue View Git Blame Copy Permalink