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somake/bin/ar.cc
Georg Sauthoff 43a5295e69 fix Linux compile issues 
- include stubs for Solaris specific functionality
- include some missing standard headers
- guard Solaris specific constructs with preprocessor conditionals
- fix pointer-to-int-cast undefined behavior
2016-08-21 23:34:14 +02:00

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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2004 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/*
* ar.c
*
* Deal with the lib.a(member.o) and lib.a((entry-point)) notations
*
* Look inside archives for notations a(b) and a((b))
* a(b) is file member b in archive a
* a((b)) is entry point b in object archive a
*
* For 6.0, create a make which can understand all archive
* formats. This is kind of tricky, and <ar.h> isnt any help.
*/
/*
* Included files
*/
#include <alloca.h> /* alloca() */
#include <ar.h>
#include <errno.h> /* errno */
#include <fcntl.h> /* open() */
#include <libintl.h>
#include <mk/defs.h>
#include <mksh/misc.h> /* retmem_mb() */
#include <ctype.h>
struct ranlib {
union {
off_t ran_strx; /* string table index of */
char *ran_name; /* symbol defined by */
} ran_un;
off_t ran_off; /* library member at this offset */
};
#include <unistd.h> /* close() */
/*
* Defined macros
*/
#ifndef S5EMUL
#undef BITSPERBYTE
#define BITSPERBYTE 8
#endif
/*
* Defines for all the different archive formats. See next comment
* block for justification for not using <ar.h>s versions.
*/
#define AR_5_MAGIC "<ar>" /* 5.0 format magic string */
#define AR_5_MAGIC_LENGTH 4 /* 5.0 format string length */
#define AR_PORT_MAGIC "!<arch>\n" /* Port. (6.0) magic string */
#define AR_PORT_MAGIC_LENGTH 8 /* Port. (6.0) string length */
#define AR_PORT_END_MAGIC "`\n" /* Port. (6.0) end of header */
#define AR_PORT_WORD 4 /* Port. (6.0) 'word' length */
/*
* typedefs & structs
*/
/*
* These are the archive file headers for the formats. Note
* that it really doesnt matter if these structures are defined
* here. They are correct as of the respective archive format
* releases. If the archive format is changed, then since backwards
* compatability is the desired behavior, a new structure is added
* to the list.
*/
typedef struct { /* 5.0 ar header format: vax family; 3b family */
char ar_magic[AR_5_MAGIC_LENGTH]; /* AR_5_MAGIC*/
char ar_name[16]; /* Space terminated */
char ar_date[AR_PORT_WORD]; /* sgetl() accessed */
char ar_syms[AR_PORT_WORD]; /* sgetl() accessed */
} Arh_5;
typedef struct { /* 5.0 ar symbol format: vax family; 3b family */
char sym_name[8]; /* Space terminated */
char sym_ptr[AR_PORT_WORD]; /* sgetl() accessed */
} Ars_5;
typedef struct { /* 5.0 ar member format: vax family; 3b family */
char arf_name[16]; /* Space terminated */
char arf_date[AR_PORT_WORD]; /* sgetl() accessed */
char arf_uid[AR_PORT_WORD]; /* sgetl() accessed */
char arf_gid[AR_PORT_WORD]; /* sgetl() accessed */
char arf_mode[AR_PORT_WORD]; /* sgetl() accessed */
char arf_size[AR_PORT_WORD]; /* sgetl() accessed */
} Arf_5;
typedef struct { /* Portable (6.0) ar format: vax family; 3b family */
char ar_name[16]; /* Space terminated */
/* left-adjusted fields; decimal ascii; blank filled */
char ar_date[12];
char ar_uid[6];
char ar_gid[6];
char ar_mode[8]; /* octal ascii */
char ar_size[10];
/* special end-of-header string (AR_PORT_END_MAGIC) */
char ar_fmag[2];
} Ar_port;
enum ar_type {
AR_5,
AR_PORT
};
typedef unsigned int ar_port_word; // must be 4-bytes long
typedef struct {
FILE *fd;
/* to distiguish ar format */
enum ar_type type;
/* where first ar member header is at */
long first_ar_mem;
/* where the symbol lookup starts */
long sym_begin;
/* the number of symbols available */
long num_symbols;
/* length of symbol directory file */
long sym_size;
Arh_5 arh_5;
Ars_5 ars_5;
Arf_5 arf_5;
Ar_port ar_port;
} Ar;
/*
* Static variables
*/
/*
* File table of contents
*/
extern timestruc_t& read_archive(register Name target);
static Boolean open_archive(char *filename, register Ar *arp);
static void close_archive(register Ar *arp);
static Boolean read_archive_dir(register Ar *arp, Name library, char **long_names_table);
static void translate_entry(register Ar *arp, Name target, register Property member, char **long_names_table);
static long sgetl(char *);
/*
* read_archive(target)
*
* Read the contents of an ar file.
*
* Return value:
* The time the member was created
*
* Parameters:
* target The member to find time for
*
* Global variables used:
* empty_name The Name ""
*/
int read_member_header (Ar_port *header, FILE *fd, char* filename);
int process_long_names_member (register Ar *arp, char **long_names_table, char *filename);
timestruc_t&
read_archive(register Name target)
{
register Property member;
wchar_t *slash;
String_rec true_member_name;
wchar_t buffer[STRING_BUFFER_LENGTH];
register Name true_member = NULL;
Ar ar;
char *long_names_table = NULL; /* Table of long
member names */
member = get_prop(target->prop, member_prop);
/*
* Check if the member has directory component.
* If so, remove the dir and see if we know the date.
*/
if (member->body.member.member != NULL) {
Wstring member_string(member->body.member.member);
wchar_t * wcb = member_string.get_string();
if((slash = (wchar_t *) wcsrchr(wcb, (int) slash_char)) != NULL) {
INIT_STRING_FROM_STACK(true_member_name, buffer);
append_string(member->body.member.library->string_mb,
&true_member_name,
FIND_LENGTH);
append_char((int) parenleft_char, &true_member_name);
append_string(slash + 1, &true_member_name, FIND_LENGTH);
append_char((int) parenright_char, &true_member_name);
true_member = GETNAME(true_member_name.buffer.start,
FIND_LENGTH);
if (true_member->stat.time != file_no_time) {
target->stat.time = true_member->stat.time;
return target->stat.time;
}
}
}
if (open_archive(member->body.member.library->string_mb, &ar) == failed) {
if (errno == ENOENT) {
target->stat.stat_errno = ENOENT;
close_archive(&ar);
if (member->body.member.member == NULL) {
member->body.member.member = empty_name;
}
return target->stat.time = file_doesnt_exist;
} else {
fatal(gettext("Can't access archive `%s': %s"),
member->body.member.library->string_mb,
errmsg(errno));
}
}
if (target->stat.time == file_no_time) {
if (read_archive_dir(&ar, member->body.member.library,
&long_names_table)
== failed){
fatal(gettext("Can't access archive `%s': %s"),
member->body.member.library->string_mb,
errmsg(errno));
}
}
if (member->body.member.entry != NULL) {
translate_entry(&ar, target, member,&long_names_table);
}
close_archive(&ar);
if (long_names_table) {
retmem_mb(long_names_table);
}
if (true_member != NULL) {
target->stat.time = true_member->stat.time;
}
if (target->stat.time == file_no_time) {
target->stat.time = file_doesnt_exist;
}
return target->stat.time;
}
/*
* open_archive(filename, arp)
*
* Return value:
* Indicates if open failed or not
*
* Parameters:
* filename The name of the archive we need to read
* arp Pointer to ar file description block
*
* Global variables used:
*/
static Boolean
open_archive(char *filename, register Ar *arp)
{
int fd;
char mag_5[AR_5_MAGIC_LENGTH];
char mag_port[AR_PORT_MAGIC_LENGTH];
char buffer[4];
arp->fd = NULL;
fd = open_vroot(filename, O_RDONLY, 0, NULL, VROOT_DEFAULT);
if ((fd < 0) || ((arp->fd = fdopen(fd, "r")) == NULL)) {
return failed;
}
(void) fcntl(fileno(arp->fd), F_SETFD, 1);
if (fread(mag_port, AR_PORT_MAGIC_LENGTH, 1, arp->fd) != 1) {
return failed;
}
if (IS_EQUALN(mag_port, AR_PORT_MAGIC, AR_PORT_MAGIC_LENGTH)) {
arp->type = AR_PORT;
/*
* Read in first member header to find out if there is
* a symbol definition table.
*/
int ret = read_member_header(&arp->ar_port, arp->fd, filename);
if (ret == failed) {
return failed;
} else if(ret == -1) {
/* There is no member header - empty archive */
arp->sym_size = arp->num_symbols = arp->sym_begin = 0L;
arp->first_ar_mem = ftell(arp->fd);
return succeeded;
}
/*
* The following values are the default if there is
* no symbol directory and long member names.
*/
arp->sym_size = arp->num_symbols = arp->sym_begin = 0L;
arp->first_ar_mem = ftell(arp->fd) - (long) sizeof (Ar_port);
/*
* Do we have a symbol table? A symbol table is always
* the first member in an archive. In 4.1.x it has the
* name __.SYMDEF, in SVr4, it has the name "/ "
*/
/*
MBSTOWCS(wcs_buffer, "/ ");
if (IS_WEQUALN(arp->ar_port.ar_name, wcs_buffer, 16)) {
*/
if (IS_EQUALN(arp->ar_port.ar_name,
"/ ",
16)) {
if (sscanf(arp->ar_port.ar_size,
"%ld",
&arp->sym_size) != 1) {
return failed;
}
arp->sym_size += (arp->sym_size & 1); /* round up */
if (fread(buffer, sizeof buffer, 1, arp->fd) != 1) {
return failed;
}
arp->num_symbols = sgetl(buffer);
arp->sym_begin = ftell(arp->fd);
arp->first_ar_mem = arp->sym_begin +
arp->sym_size - sizeof buffer;
}
return succeeded;
}
fatal(gettext("`%s' is not an archive"), filename);
/* NOTREACHED */
return failed;
}
/*
* close_archive(arp)
*
* Parameters:
* arp Pointer to ar file description block
*
* Global variables used:
*/
static void
close_archive(register Ar *arp)
{
if (arp->fd != NULL) {
(void) fclose(arp->fd);
}
}
/*
* read_archive_dir(arp, library, long_names_table)
*
* Reads the directory of an archive and enters all
* the members into the make symboltable in lib(member) format
* with their dates.
*
* Parameters:
* arp Pointer to ar file description block
* library Name of lib to enter members for.
* Used to form "lib(member)" string.
* long_names_table table that contains list of members
* with names > 15 characters long
*
* Global variables used:
*/
static Boolean
read_archive_dir(register Ar *arp, Name library, char **long_names_table)
{
wchar_t *name_string;
wchar_t *member_string;
register long len;
register wchar_t *p;
register char *q;
register Name name;
Property member;
long ptr;
long date;
int offset;
/*
* If any of the members has a name > 15 chars,
* it will be found here.
*/
if (process_long_names_member(arp, long_names_table, library->string_mb) == failed) {
return failed;
}
name_string = ALLOC_WC((int) (library->hash.length +
(int) ar_member_name_len * 2));
(void) mbstowcs(name_string, library->string_mb, (int) library->hash.length);
member_string = name_string + library->hash.length;
*member_string++ = (int) parenleft_char;
if (fseek(arp->fd, arp->first_ar_mem, 0) != 0) {
goto read_error;
}
/* Read the directory using the appropriate format */
switch (arp->type) {
case AR_5:
for (;;) {
if (fread((char *) &arp->arf_5, sizeof arp->arf_5, 1, arp->fd)
!= 1) {
if (feof(arp->fd)) {
return succeeded;
}
break;
}
len = sizeof arp->arf_5.arf_name;
for (p = member_string, q = arp->arf_5.arf_name;
(len > 0) && (*q != (int) nul_char) && !isspace(*q);
) {
MBTOWC(p, q);
p++;
q++;
}
*p++ = (int) parenright_char;
*p = (int) nul_char;
name = GETNAME(name_string, FIND_LENGTH);
/*
* [tolik] Fix for dmake bug 1234018.
* If name->stat.time is already set, then it should not
* be changed. (D)make propogates time stamp for one
* member, and when it calls exists() for another member,
* the first one may be changed.
*/
if(name->stat.time == file_no_time) {
name->stat.time.tv_sec = sgetl(arp->arf_5.arf_date);
name->stat.time.tv_nsec = LONG_MAX;
}
name->is_member = library->is_member;
member = maybe_append_prop(name, member_prop);
member->body.member.library = library;
*--p = (int) nul_char;
if (member->body.member.member == NULL) {
member->body.member.member =
GETNAME(member_string, FIND_LENGTH);
}
ptr = sgetl(arp->arf_5.arf_size);
ptr += (ptr & 1);
if (fseek(arp->fd, ptr, 1) != 0) {
goto read_error;
}
}
break;
case AR_PORT:
for (;;) {
if ((fread((char *) &arp->ar_port,
sizeof arp->ar_port,
1,
arp->fd) != 1) ||
!IS_EQUALN(arp->ar_port.ar_fmag,
AR_PORT_END_MAGIC,
sizeof arp->ar_port.ar_fmag)) {
if (feof(arp->fd)) {
return succeeded;
}
fatal(
gettext("Read error in archive `%s': invalid archive file member header at 0x%x"),
library->string_mb,
ftell(arp->fd)
);
}
/* If it's a long name, retrieve it from long name table */
if (arp->ar_port.ar_name[0] == '/') {
/*
* "len" is used for hashing the string.
* We're using "ar_member_name_len" instead of
* the actual name length since it's the longest
* string the "ar" command can handle at this
* point.
*/
len = ar_member_name_len;
sscanf(arp->ar_port.ar_name + 1,
"%ld",
&offset);
q = *long_names_table + offset;
} else {
q = arp->ar_port.ar_name;
len = sizeof arp->ar_port.ar_name;
}
for (p = member_string;
(len > 0) &&
(*q != (int) nul_char) &&
!isspace(*q) &&
(*q != (int) slash_char);
) {
MBTOWC(p, q);
p++;
q++;
}
*p++ = (int) parenright_char;
*p = (int) nul_char;
name = GETNAME(name_string, FIND_LENGTH);
name->is_member = library->is_member;
member = maybe_append_prop(name, member_prop);
member->body.member.library = library;
*--p = (int) nul_char;
if (member->body.member.member == NULL) {
member->body.member.member =
GETNAME(member_string, FIND_LENGTH);
}
if (sscanf(arp->ar_port.ar_date, "%ld", &date) != 1) {
WCSTOMBS(mbs_buffer, name_string);
fatal(gettext("Bad date field for member `%s' in archive `%s'"),
mbs_buffer,
library->string_mb);
}
/*
* [tolik] Fix for dmake bug 1234018.
*/
if(name->stat.time == file_no_time) {
name->stat.time.tv_sec = date;
name->stat.time.tv_nsec = LONG_MAX;
}
if (sscanf(arp->ar_port.ar_size, "%ld", &ptr) != 1) {
WCSTOMBS(mbs_buffer, name_string);
fatal(gettext("Bad size field for member `%s' in archive `%s'"),
mbs_buffer,
library->string_mb);
}
ptr += (ptr & 1);
if (fseek(arp->fd, ptr, 1) != 0) {
goto read_error;
}
}
break;
}
/* Only here if fread() [or IS_EQUALN()] failed and not at EOF */
read_error:
fatal(gettext("Read error in archive `%s': %s"),
library->string_mb,
errmsg(errno));
/* NOTREACHED */
}
/*
* process_long_names_member(arp)
*
* If the archive contains members with names longer
* than 15 characters, then it has a special member
* with the name "// " that contains a table
* of null-terminated long names. This member
* is always the first member, after the symbol table
* if it exists.
*
* Parameters:
* arp Pointer to ar file description block
*
* Global variables used:
*/
int
process_long_names_member(register Ar *arp, char **long_names_table, char *filename)
{
Ar_port *ar_member_header;
int table_size;
if (fseek(arp->fd, arp->first_ar_mem, 0) != 0) {
return failed;
}
if ((ar_member_header =
(Ar_port *) alloca((int) sizeof(Ar_port))) == NULL){
perror(gettext("memory allocation failure"));
return failed;
}
int ret = read_member_header(ar_member_header, arp->fd, filename);
if (ret == failed) {
return failed;
} else if(ret == -1) {
/* There is no member header - empty archive */
return succeeded;
}
/* Do we have special member containing long names? */
if (IS_EQUALN(ar_member_header->ar_name,
"// ",
16)){
if (sscanf(ar_member_header->ar_size,
"%ld",
&table_size) != 1) {
return failed;
}
*long_names_table = (char *) malloc(table_size);
/* Read the list of long member names into the table */
if (fread(*long_names_table, table_size, 1, arp->fd) != 1) {
return failed;
}
arp->first_ar_mem = ftell(arp->fd);
}
return succeeded;
}
/*
* translate_entry(arp, target, member)
*
* Finds the member for one lib.a((entry))
*
* Parameters:
* arp Pointer to ar file description block
* target Target to find member name for
* member Property to fill in with info
*
* Global variables used:
*/
static void
translate_entry(register Ar *arp, Name target, register Property member, char **long_names_table)
{
register int len;
register int i;
wchar_t *member_string;
ar_port_word *offs;
int strtablen;
char *syms; /* string table */
char *csym; /* string table */
ar_port_word *offend; /* end of offsets table */
int date;
register wchar_t *ap;
register char *hp;
int maxs;
int offset;
char buffer[4];
if (arp->sym_begin == 0L || arp->num_symbols == 0L) {
fatal(gettext("Cannot find symbol `%s' in archive `%s'"),
member->body.member.entry->string_mb,
member->body.member.library->string_mb);
}
if (fseek(arp->fd, arp->sym_begin, 0) != 0) {
goto read_error;
}
member_string = ALLOC_WC((int) ((int) ar_member_name_len * 2));
switch (arp->type) {
case AR_5:
if ((len = member->body.member.entry->hash.length) > 8) {
len = 8;
}
for (i = 0; i < arp->num_symbols; i++) {
if (fread((char *) &arp->ars_5,
sizeof arp->ars_5,
1,
arp->fd) != 1) {
goto read_error;
}
if (IS_EQUALN(arp->ars_5.sym_name,
member->body.member.entry->string_mb,
len)) {
if ((fseek(arp->fd,
sgetl(arp->ars_5.sym_ptr),
0) != 0) ||
(fread((char *) &arp->arf_5,
sizeof arp->arf_5,
1,
arp->fd) != 1)) {
goto read_error;
}
MBSTOWCS(wcs_buffer, arp->arf_5.arf_name);
(void) wcsncpy(member_string,
wcs_buffer,
wcslen(wcs_buffer));
member_string[sizeof(arp->arf_5.arf_name)] =
(int) nul_char;
member->body.member.member =
GETNAME(member_string, FIND_LENGTH);
target->stat.time.tv_sec = sgetl(arp->arf_5.arf_date);
target->stat.time.tv_nsec = LONG_MAX;
return;
}
}
break;
case AR_PORT:
offs = (ar_port_word *) alloca((int) (arp->num_symbols * AR_PORT_WORD));
if (fread((char *) offs,
AR_PORT_WORD,
(int) arp->num_symbols,
arp->fd) != arp->num_symbols) {
goto read_error;
}
for(i=0;i<arp->num_symbols;i++) {
*((int*)buffer)=offs[i];
offs[i]=(ar_port_word)sgetl(buffer);
}
strtablen=arp->sym_size-4-(int) (arp->num_symbols * AR_PORT_WORD);
syms = (char *) alloca(strtablen);
if (fread(syms,
sizeof (char),
strtablen,
arp->fd) != strtablen) {
goto read_error;
}
offend = &offs[arp->num_symbols];
while (offs < offend) {
maxs = strlen(member->body.member.entry->string_mb);
if(strlen(syms) > maxs)
maxs = strlen(syms);
if (IS_EQUALN(syms,
member->body.member.entry->string_mb,
maxs)) {
if (fseek(arp->fd,
(long) *offs,
0) != 0) {
goto read_error;
}
if ((fread((char *) &arp->ar_port,
sizeof arp->ar_port,
1,
arp->fd) != 1) ||
!IS_EQUALN(arp->ar_port.ar_fmag,
AR_PORT_END_MAGIC,
sizeof arp->ar_port.ar_fmag)) {
goto read_error;
}
if (sscanf(arp->ar_port.ar_date,
"%ld",
&date) != 1) {
fatal(gettext("Bad date field for member `%s' in archive `%s'"),
arp->ar_port.ar_name,
target->string_mb);
}
/* If it's a long name, retrieve it from long name table */
if (arp->ar_port.ar_name[0] == '/') {
sscanf(arp->ar_port.ar_name + 1,
"%ld",
&offset);
len = ar_member_name_len;
hp = *long_names_table + offset;
} else {
len = sizeof arp->ar_port.ar_name;
hp = arp->ar_port.ar_name;
}
ap = member_string;
while (*hp &&
(*hp != (int) slash_char) &&
(ap < &member_string[len])) {
MBTOWC(ap, hp);
ap++;
hp++;
}
*ap = (int) nul_char;
member->body.member.member =
GETNAME(member_string, FIND_LENGTH);
target->stat.time.tv_sec = date;
target->stat.time.tv_nsec = LONG_MAX;
return;
}
offs++;
while(*syms!='\0') syms++;
syms++;
}
}
fatal(gettext("Cannot find symbol `%s' in archive `%s'"),
member->body.member.entry->string_mb,
member->body.member.library->string_mb);
/*NOTREACHED*/
read_error:
if (ferror(arp->fd)) {
fatal(gettext("Read error in archive `%s': %s"),
member->body.member.library->string_mb,
errmsg(errno));
} else {
fatal(gettext("Read error in archive `%s': Premature EOF"),
member->body.member.library->string_mb);
}
}
/*
* sgetl(buffer)
*
* The intent here is to provide a means to make the value of
* bytes in an io-buffer correspond to the value of a long
* in the memory while doing the io a long at a time.
* Files written and read in this way are machine-independent.
*
* Return value:
* Long int read from buffer
* Parameters:
* buffer buffer we need to read long int from
*
* Global variables used:
*/
static long
sgetl(register char *buffer)
{
register long w = 0;
register int i = BITSPERBYTE * AR_PORT_WORD;
while ((i -= BITSPERBYTE) >= 0) {
w |= (long) ((unsigned char) *buffer++) << i;
}
return w;
}
/*
* read_member_header(header, fd, filename)
*
* reads the member header for the 4.1.x and SVr4 archives.
*
* Return value:
* fails if read error or member
* header is not the right format
* Parameters:
* header There's one before each archive member
* fd file descriptor for the archive file.
*
* Global variables used:
*/
int
read_member_header(Ar_port *header, FILE *fd, char* filename)
{
int num = fread((char *) header, sizeof (Ar_port), 1, fd);
if (num != 1 && feof(fd)) {
/* There is no member header - empty archive */
return -1;
}
if ((num != 1) ||
!IS_EQUALN(
AR_PORT_END_MAGIC,
header->ar_fmag,
sizeof (header->ar_fmag)
)
) {
fatal(
gettext("Read error in archive `%s': invalid archive file member header at 0x%x"),
filename,
ftell(fd)
);
}
return succeeded;
}
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