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rpm/rpmio/macro.c

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/** \ingroup rpmrc rpmio
* \file rpmio/macro.c
*/
#include "system.h"
#include <stdarg.h>
#ifdef HAVE_GETOPT_H
#include <getopt.h>
#else
extern char *optarg;
extern int optind;
#endif
#if !defined(isblank)
#define isblank(_c) ((_c) == ' ' || (_c) == '\t')
#endif
#define iseol(_c) ((_c) == '\n' || (_c) == '\r')
#define STREQ(_t, _f, _fn) ((_fn) == (sizeof(_t)-1) && rstreqn((_t), (_f), (_fn)))
#define MACROBUFSIZ (BUFSIZ * 2)
#include <rpm/rpmio.h>
#include <rpm/rpmstring.h>
#include <rpm/rpmfileutil.h>
#include <rpm/rpmurl.h>
#include <rpm/rpmlog.h>
#include <rpm/rpmmacro.h>
#include <rpm/argv.h>
#ifdef WITH_LUA
#include "rpmio/rpmlua.h"
#endif
#include "debug.h"
/*! The structure used to store a macro. */
struct rpmMacroEntry_s {
struct rpmMacroEntry_s *prev;/*!< Macro entry stack. */
const char *name; /*!< Macro name. */
const char *opts; /*!< Macro parameters (a la getopt) */
const char *body; /*!< Macro body. */
int used; /*!< No. of expansions. */
int level; /*!< Scoping level. */
char arena[]; /*!< String arena. */
};
/*! The structure used to store the set of macros in a context. */
struct rpmMacroContext_s {
rpmMacroEntry *tab; /*!< Macro entry table (array of pointers). */
int n; /*!< No. of macros. */
};
static struct rpmMacroContext_s rpmGlobalMacroContext_s;
rpmMacroContext rpmGlobalMacroContext = &rpmGlobalMacroContext_s;
static struct rpmMacroContext_s rpmCLIMacroContext_s;
rpmMacroContext rpmCLIMacroContext = &rpmCLIMacroContext_s;
/**
* Macro expansion state.
*/
typedef struct MacroBuf_s {
char * buf; /*!< Expansion buffer. */
size_t tpos; /*!< Current position in expansion buffer */
size_t nb; /*!< No. bytes remaining in expansion buffer. */
int depth; /*!< Current expansion depth. */
int macro_trace; /*!< Pre-print macro to expand? */
int expand_trace; /*!< Post-print macro expansion? */
rpmMacroContext mc;
} * MacroBuf;
#define _MAX_MACRO_DEPTH 16
static int max_macro_depth = _MAX_MACRO_DEPTH;
#define _PRINT_MACRO_TRACE 0
static int print_macro_trace = _PRINT_MACRO_TRACE;
#define _PRINT_EXPAND_TRACE 0
static int print_expand_trace = _PRINT_EXPAND_TRACE;
/* forward ref */
static int expandMacro(MacroBuf mb, const char *src, size_t slen);
static void pushMacro(rpmMacroContext mc,
const char * n, const char * o, const char * b, int level);
static void popMacro(rpmMacroContext mc, const char * n);
/* =============================================================== */
static rpmMacroContext rpmmctxAcquire(rpmMacroContext mc)
{
if (mc == NULL)
mc = rpmGlobalMacroContext;
return mc;
}
static rpmMacroContext rpmmctxRelease(rpmMacroContext mc)
{
return NULL;
}
/**
* Find entry in macro table.
* @param mc macro context
* @param name macro name
* @param namelen no. of bytes
* @param pos found/insert position
* @return address of slot in macro table with name (or NULL)
*/
static rpmMacroEntry *
findEntry(rpmMacroContext mc, const char *name, size_t namelen, size_t *pos)
{
/* bsearch */
int cmp = 1;
size_t l = 0;
size_t u = mc->n;
size_t i = 0;
while (l < u) {
i = (l + u) / 2;
rpmMacroEntry me = mc->tab[i];
if (namelen == 0)
cmp = strcmp(me->name, name);
else {
cmp = strncmp(me->name, name, namelen);
/* longer me->name compares greater */
if (cmp == 0)
cmp = (me->name[namelen] != '\0');
}
if (cmp < 0)
l = i + 1;
else if (cmp > 0)
u = i;
else
break;
}
if (pos)
*pos = (cmp < 0) ? i + 1 : i;
if (cmp == 0)
return &mc->tab[i];
return NULL;
}
/* =============================================================== */
/**
* fgets(3) analogue that reads \ continuations. Last newline always trimmed.
* @param buf input buffer
* @param size inbut buffer size (bytes)
* @param fd file handle
* @return buffer, or NULL on end-of-file
*/
static char *
rdcl(char * buf, size_t size, FILE *f)
{
char *q = buf - 1; /* initialize just before buffer. */
size_t nb = 0;
size_t nread = 0;
int pc = 0, bc = 0;
char *p = buf;
if (f != NULL)
do {
*(++q) = '\0'; /* terminate and move forward. */
if (fgets(q, size, f) == NULL) /* read next line. */
break;
nb = strlen(q);
nread += nb; /* trim trailing \r and \n */
for (q += nb - 1; nb > 0 && iseol(*q); q--)
nb--;
for (; p <= q; p++) {
switch (*p) {
case '\\':
switch (*(p+1)) {
case '\0': break;
default: p++; break;
}
break;
case '%':
switch (*(p+1)) {
case '{': p++, bc++; break;
case '(': p++, pc++; break;
case '%': p++; break;
}
break;
case '{': if (bc > 0) bc++; break;
case '}': if (bc > 0) bc--; break;
case '(': if (pc > 0) pc++; break;
case ')': if (pc > 0) pc--; break;
}
}
if (nb == 0 || (*q != '\\' && !bc && !pc) || *(q+1) == '\0') {
*(++q) = '\0'; /* trim trailing \r, \n */
break;
}
q++; p++; nb++; /* copy newline too */
size -= nb;
if (*q == '\r') /* XXX avoid \r madness */
*q = '\n';
} while (size > 0);
return (nread > 0 ? buf : NULL);
}
/**
* Return text between pl and matching pr characters.
* @param p start of text
* @param pl left char, i.e. '[', '(', '{', etc.
* @param pr right char, i.e. ']', ')', '}', etc.
* @return address of last char before pr (or NULL)
*/
static const char *
matchchar(const char * p, char pl, char pr)
{
int lvl = 0;
char c;
while ((c = *p++) != '\0') {
if (c == '\\') { /* Ignore escaped chars */
p++;
continue;
}
if (c == pr) {
if (--lvl <= 0) return --p;
} else if (c == pl)
lvl++;
}
return (const char *)NULL;
}
/**
* Pre-print macro expression to be expanded.
* @param mb macro expansion state
* @param s current expansion string
* @param se end of string
*/
static void
printMacro(MacroBuf mb, const char * s, const char * se)
{
const char *senl;
const char *ellipsis;
int choplen;
if (s >= se) { /* XXX just in case */
fprintf(stderr, _("%3d>%*s(empty)"), mb->depth,
(2 * mb->depth + 1), "");
return;
}
if (s[-1] == '{')
s--;
/* Print only to first end-of-line (or end-of-string). */
for (senl = se; *senl && !iseol(*senl); senl++)
{};
/* Limit trailing non-trace output */
choplen = 61 - (2 * mb->depth);
if ((senl - s) > choplen) {
senl = s + choplen;
ellipsis = "...";
} else
ellipsis = "";
/* Substitute caret at end-of-macro position */
fprintf(stderr, "%3d>%*s%%%.*s^", mb->depth,
(2 * mb->depth + 1), "", (int)(se - s), s);
if (se[1] != '\0' && (senl - (se+1)) > 0)
fprintf(stderr, "%-.*s%s", (int)(senl - (se+1)), se+1, ellipsis);
fprintf(stderr, "\n");
}
/**
* Post-print expanded macro expression.
* @param mb macro expansion state
* @param t current expansion string result
* @param te end of string
*/
static void
printExpansion(MacroBuf mb, const char * t, const char * te)
{
const char *ellipsis;
int choplen;
if (!(te > t)) {
rpmlog(RPMLOG_DEBUG, _("%3d<%*s(empty)\n"), mb->depth, (2 * mb->depth + 1), "");
return;
}
/* Shorten output which contains newlines */
while (te > t && iseol(te[-1]))
te--;
ellipsis = "";
if (mb->depth > 0) {
const char *tenl;
/* Skip to last line of expansion */
while ((tenl = strchr(t, '\n')) && tenl < te)
t = ++tenl;
/* Limit expand output */
choplen = 61 - (2 * mb->depth);
if ((te - t) > choplen) {
te = t + choplen;
ellipsis = "...";
}
}
rpmlog(RPMLOG_DEBUG,"%3d<%*s", mb->depth, (2 * mb->depth + 1), "");
if (te > t)
rpmlog(RPMLOG_DEBUG, "%.*s%s", (int)(te - t), t, ellipsis);
rpmlog(RPMLOG_DEBUG, "\n");
}
#define SKIPBLANK(_s, _c) \
while (((_c) = *(_s)) && isblank(_c)) \
(_s)++; \
#define SKIPNONBLANK(_s, _c) \
while (((_c) = *(_s)) && !(isblank(_c) || iseol(_c))) \
(_s)++; \
#define COPYNAME(_ne, _s, _c) \
{ SKIPBLANK(_s,_c); \
while(((_c) = *(_s)) && (risalnum(_c) || (_c) == '_')) \
*(_ne)++ = *(_s)++; \
*(_ne) = '\0'; \
}
#define COPYOPTS(_oe, _s, _c) \
{ \
while(((_c) = *(_s)) && (_c) != ')') \
*(_oe)++ = *(_s)++; \
*(_oe) = '\0'; \
}
/**
* Macro-expand string src, return result in dynamically allocated buffer.
* @param mb macro expansion state
* @param src string to expand
* @param slen input string length (or 0 for strlen())
* @retval target pointer to expanded string (malloced)
* @return result of expansion
*/
static int
expandThis(MacroBuf mb, const char * src, size_t slen, char **target)
{
struct MacroBuf_s umb;
int rc;
/* Copy other state from "parent", but we want a buffer of our own */
umb = *mb;
umb.buf = NULL;
rc = expandMacro(&umb, src, slen);
*target = umb.buf;
return rc;
}
static void mbAppend(MacroBuf mb, char c)
{
if (mb->nb < 1) {
mb->buf = xrealloc(mb->buf, mb->tpos + MACROBUFSIZ + 1);
mb->nb += MACROBUFSIZ;
}
mb->buf[mb->tpos++] = c;
mb->buf[mb->tpos] = '\0';
mb->nb--;
}
static void mbAppendStr(MacroBuf mb, const char *str)
{
size_t len = strlen(str);
if (len > mb->nb) {
mb->buf = xrealloc(mb->buf, mb->tpos + mb->nb + MACROBUFSIZ + len + 1);
mb->nb += MACROBUFSIZ + len;
}
memcpy(mb->buf+mb->tpos, str, len + 1);
mb->tpos += len;
mb->nb -= len;
}
/**
* Expand output of shell command into target buffer.
* @param mb macro expansion state
* @param cmd shell command
* @param clen no. bytes in shell command
* @return result of expansion
*/
static int
doShellEscape(MacroBuf mb, const char * cmd, size_t clen)
{
char *buf = NULL;
FILE *shf;
int rc = 0;
int c;
rc = expandThis(mb, cmd, clen, &buf);
if (rc)
goto exit;
if ((shf = popen(buf, "r")) == NULL) {
rc = 1;
goto exit;
}
size_t tpos = mb->tpos;
while((c = fgetc(shf)) != EOF) {
mbAppend(mb, c);
}
(void) pclose(shf);
/* Delete trailing \r \n */
while (mb->tpos > tpos && iseol(mb->buf[mb->tpos-1])) {
mb->buf[--mb->tpos] = '\0';
mb->nb++;
}
exit:
_free(buf);
return rc;
}
/**
* Parse (and execute) new macro definition.
* @param mb macro expansion state
* @param se macro definition to parse
* @param level macro recursion level
* @param expandbody should body be expanded?
* @return address to continue parsing
*/
static const char *
doDefine(MacroBuf mb, const char * se, int level, int expandbody)
{
const char *s = se;
size_t blen = MACROBUFSIZ;
char *buf = xmalloc(blen);
char *n = buf, *ne = n;
char *o = NULL, *oe;
char *b, *be, *ebody = NULL;
int c;
int oc = ')';
const char *sbody; /* as-is body start */
/* Copy name */
COPYNAME(ne, s, c);
/* Copy opts (if present) */
oe = ne + 1;
if (*s == '(') {
s++; /* skip ( */
o = oe;
COPYOPTS(oe, s, oc);
s++; /* skip ) */
}
/* Copy body, skipping over escaped newlines */
b = be = oe + 1;
sbody = s;
SKIPBLANK(s, c);
if (c == '{') { /* XXX permit silent {...} grouping */
if ((se = matchchar(s, c, '}')) == NULL) {
rpmlog(RPMLOG_ERR,
_("Macro %%%s has unterminated body\n"), n);
se = s; /* XXX W2DO? */
goto exit;
}
s++; /* XXX skip { */
strncpy(b, s, (se - s));
b[se - s] = '\0';
be += strlen(b);
se++; /* XXX skip } */
s = se; /* move scan forward */
} else { /* otherwise free-field */
int bc = 0, pc = 0;
while (*s && (bc || pc || !iseol(*s))) {
switch (*s) {
case '\\':
switch (*(s+1)) {
case '\0': break;
default: s++; break;
}
break;
case '%':
switch (*(s+1)) {
case '{': *be++ = *s++; bc++; break;
case '(': *be++ = *s++; pc++; break;
case '%': *be++ = *s++; break;
}
break;
case '{': if (bc > 0) bc++; break;
case '}': if (bc > 0) bc--; break;
case '(': if (pc > 0) pc++; break;
case ')': if (pc > 0) pc--; break;
}
*be++ = *s++;
}
*be = '\0';
if (bc || pc) {
rpmlog(RPMLOG_ERR,
_("Macro %%%s has unterminated body\n"), n);
se = s; /* XXX W2DO? */
goto exit;
}
/* Trim trailing blanks/newlines */
while (--be >= b && (c = *be) && (isblank(c) || iseol(c)))
{};
*(++be) = '\0'; /* one too far */
}
/* Move scan over body */
while (iseol(*s))
s++;
se = s;
/* Names must start with alphabetic or _ and be at least 3 chars */
if (!((c = *n) && (risalpha(c) || c == '_') && (ne - n) > 2)) {
rpmlog(RPMLOG_ERR,
_("Macro %%%s has illegal name (%%define)\n"), n);
goto exit;
}
/* Options must be terminated with ')' */
if (o && oc != ')') {
rpmlog(RPMLOG_ERR, _("Macro %%%s has unterminated opts\n"), n);
goto exit;
}
if ((be - b) < 1) {
rpmlog(RPMLOG_ERR, _("Macro %%%s has empty body\n"), n);
goto exit;
}
if (!isblank(*sbody) && !(*sbody == '\\' && iseol(sbody[1])))
rpmlog(RPMLOG_WARNING, _("Macro %%%s needs whitespace before body\n"), n);
if (expandbody) {
if (expandThis(mb, b, 0, &ebody)) {
rpmlog(RPMLOG_ERR, _("Macro %%%s failed to expand\n"), n);
goto exit;
}
b = ebody;
}
pushMacro(mb->mc, n, o, b, (level - 1));
exit:
_free(buf);
_free(ebody);
return se;
}
/**
* Parse (and execute) macro undefinition.
* @param mc macro context
* @param se macro name to undefine
* @return address to continue parsing
*/
static const char *
doUndefine(rpmMacroContext mc, const char * se)
{
const char *s = se;
char *buf = xmalloc(MACROBUFSIZ);
char *n = buf, *ne = n;
int c;
COPYNAME(ne, s, c);
/* Move scan over body */
while (iseol(*s))
s++;
se = s;
/* Names must start with alphabetic or _ and be at least 3 chars */
if (!((c = *n) && (risalpha(c) || c == '_') && (ne - n) > 2)) {
rpmlog(RPMLOG_ERR,
_("Macro %%%s has illegal name (%%undefine)\n"), n);
goto exit;
}
popMacro(mc, n);
exit:
_free(buf);
return se;
}
/**
* Free parsed arguments for parameterized macro.
* @param mb macro expansion state
*/
static void
freeArgs(MacroBuf mb)
{
rpmMacroContext mc = mb->mc;
/* Delete dynamic macro definitions */
for (int i = 0; i < mc->n; i++) {
int skiptest = 0;
rpmMacroEntry me = mc->tab[i];
assert(me);
if (me->level < mb->depth)
continue;
if (strlen(me->name) == 1 && strchr("#*0", *me->name)) {
if (*me->name == '*' && me->used > 0)
skiptest = 1; /* XXX skip test for %# %* %0 */
} else if (!skiptest && me->used <= 0) {
#if NOTYET
rpmlog(RPMLOG_ERR,
_("Macro %%%s (%s) was not used below level %d\n"),
me->name, me->body, me->level);
#endif
}
/* compensate if the slot is to go away */
if (me->prev == NULL)
i--;
popMacro(mc, me->name);
}
}
/**
* Parse arguments (to next new line) for parameterized macro.
* @todo Use popt rather than getopt to parse args.
* @param mb macro expansion state
* @param me macro entry slot
* @param se arguments to parse
* @param lastc stop parsing at lastc
* @return address to continue parsing
*/
static const char *
grabArgs(MacroBuf mb, const rpmMacroEntry me, const char * se,
const char * lastc)
{
const char *opts;
char *args = NULL;
ARGV_t argv = NULL;
int argc = 0;
int c;
/* Copy macro name as argv[0] */
argvAdd(&argv, me->name);
pushMacro(mb->mc, "0", NULL, me->name, mb->depth);
/*
* Make a copy of se up to lastc string that we can pass to argvSplit().
* Append the results to main argv.
*/
{ ARGV_t av = NULL;
char *s = xcalloc((lastc-se)+1, sizeof(*s));
memcpy(s, se, (lastc-se));
argvSplit(&av, s, " \t");
argvAppend(&argv, av);
argvFree(av);
free(s);
}
/*
* The macro %* analoguous to the shell's $* means "Pass all non-macro
* parameters." Consequently, there needs to be a macro that means "Pass all
* (including macro parameters) options". This is useful for verifying
* parameters during expansion and yet transparently passing all parameters
* through for higher level processing (e.g. %description and/or %setup).
* This is the (potential) justification for %{**} ...
*/
args = argvJoin(argv + 1, " ");
pushMacro(mb->mc, "**", NULL, args, mb->depth);
free(args);
/*
* POSIX states optind must be 1 before any call but glibc uses 0
* to (re)initialize getopt structures, eww.
*/
#ifdef __GLIBC__
optind = 0;
#else
optind = 1;
#endif
opts = me->opts;
argc = argvCount(argv);
/* Define option macros. */
while((c = getopt(argc, argv, opts)) != -1)
{
char *name = NULL, *body = NULL;
if (c == '?' || strchr(opts, c) == NULL) {
rpmlog(RPMLOG_ERR, _("Unknown option %c in %s(%s)\n"),
(char)optopt, me->name, opts);
goto exit;
}
rasprintf(&name, "-%c", c);
if (optarg) {
rasprintf(&body, "-%c %s", c, optarg);
} else {
rasprintf(&body, "-%c", c);
}
pushMacro(mb->mc, name, NULL, body, mb->depth);
free(name);
free(body);
if (optarg) {
rasprintf(&name, "-%c*", c);
pushMacro(mb->mc, name, NULL, optarg, mb->depth);
free(name);
}
}
/* Add argument count (remaining non-option items) as macro. */
{ char *ac = NULL;
rasprintf(&ac, "%d", (argc - optind));
pushMacro(mb->mc, "#", NULL, ac, mb->depth);
free(ac);
}
/* Add macro for each argument */
if (argc - optind) {
for (c = optind; c < argc; c++) {
char *name = NULL;
rasprintf(&name, "%d", (c - optind + 1));
pushMacro(mb->mc, name, NULL, argv[c], mb->depth);
free(name);
}
}
/* Add concatenated unexpanded arguments as yet another macro. */
args = argvJoin(argv + optind, " ");
pushMacro(mb->mc, "*", NULL, args ? args : "", mb->depth);
free(args);
exit:
argvFree(argv);
return *lastc ? lastc + 1 : lastc;
}
/**
* Perform macro message output
* @param mb macro expansion state
* @param waserror use rpmlog()?
* @param msg message to ouput
* @param msglen no. of bytes in message
*/
static void
doOutput(MacroBuf mb, int waserror, const char * msg, size_t msglen)
{
char *buf = NULL;
(void) expandThis(mb, msg, msglen, &buf);
if (waserror)
rpmlog(RPMLOG_ERR, "%s\n", buf);
else
fprintf(stderr, "%s", buf);
_free(buf);
}
/**
* Execute macro primitives.
* @param mb macro expansion state
* @param negate should logic be inverted?
* @param f beginning of field f
* @param fn length of field f
* @param g beginning of field g
* @param gn length of field g
*/
static void
doFoo(MacroBuf mb, int negate, const char * f, size_t fn,
const char * g, size_t gn)
{
char *buf = NULL;
char *b = NULL, *be;
int c;
if (g != NULL) {
(void) expandThis(mb, g, gn, &buf);
} else {
buf = xmalloc(MACROBUFSIZ + fn + gn);
buf[0] = '\0';
}
if (STREQ("basename", f, fn)) {
if ((b = strrchr(buf, '/')) == NULL)
b = buf;
else
b++;
} else if (STREQ("dirname", f, fn)) {
if ((b = strrchr(buf, '/')) != NULL)
*b = '\0';
b = buf;
} else if (STREQ("suffix", f, fn)) {
if ((b = strrchr(buf, '.')) != NULL)
b++;
} else if (STREQ("expand", f, fn)) {
b = buf;
} else if (STREQ("verbose", f, fn)) {
if (negate)
b = (rpmIsVerbose() ? NULL : buf);
else
b = (rpmIsVerbose() ? buf : NULL);
} else if (STREQ("url2path", f, fn) || STREQ("u2p", f, fn)) {
(void)urlPath(buf, (const char **)&b);
if (*b == '\0') b = "/";
} else if (STREQ("uncompress", f, fn)) {
rpmCompressedMagic compressed = COMPRESSED_OTHER;
for (b = buf; (c = *b) && isblank(c);)
b++;
for (be = b; (c = *be) && !isblank(c);)
be++;
*be++ = '\0';
(void) rpmFileIsCompressed(b, &compressed);
switch(compressed) {
default:
case COMPRESSED_NOT:
sprintf(be, "%%__cat %s", b);
break;
case COMPRESSED_OTHER:
sprintf(be, "%%__gzip -dc %s", b);
break;
case COMPRESSED_BZIP2:
sprintf(be, "%%__bzip2 -dc %s", b);
break;
case COMPRESSED_ZIP:
sprintf(be, "%%__unzip %s", b);
break;
case COMPRESSED_LZMA:
case COMPRESSED_XZ:
sprintf(be, "%%__xz -dc %s", b);
break;
case COMPRESSED_LZIP:
sprintf(be, "%%__lzip -dc %s", b);
break;
case COMPRESSED_LRZIP:
sprintf(be, "%%__lrzip -dqo- %s", b);
break;
case COMPRESSED_7ZIP:
sprintf(be, "%%__7zip x %s", b);
break;
}
b = be;
} else if (STREQ("getenv", f, fn)) {
b = getenv(buf);
} else if (STREQ("getconfdir", f, fn)) {
sprintf(buf, "%s", rpmConfigDir());
b = buf;
} else if (STREQ("S", f, fn)) {
for (b = buf; (c = *b) && risdigit(c);)
b++;
if (!c) { /* digit index */
b++;
sprintf(b, "%%SOURCE%s", buf);
} else
b = buf;
} else if (STREQ("P", f, fn)) {
for (b = buf; (c = *b) && risdigit(c);)
b++;
if (!c) { /* digit index */
b++;
sprintf(b, "%%PATCH%s", buf);
} else
b = buf;
} else if (STREQ("F", f, fn)) {
b = buf + strlen(buf) + 1;
sprintf(b, "file%s.file", buf);
}
if (b) {
(void) expandMacro(mb, b, 0);
}
free(buf);
}
/**
* Parse for flags before macro name, such as in %{?!name:subst}.
* @param s macro flags start
* @param negate flipped by each '!' flag
* @param chkexist increased by each '?' flag
* @return macro flags end
*/
static const char *
parseMacroFlags(const char *s, int *negate, int *chkexist)
{
while (1) {
switch (*s) {
case '!':
*negate = !*negate;
s++;
break;
case '?':
(*chkexist)++;
s++;
break;
default:
return s;
}
}
/* not reached */
return s;
}
/**
* Parse for valid macro name (during expansion).
* @param s macro name start
* @return macro name end, NULL on error
*/
static const char *
parseMacroName(const char *s)
{
/* alnum identifiers */
if (risalpha(*s) || *s == '_') {
const char *se = s + 1;
while (risalnum(*se) || *se == '_')
se++;
switch (se - s) {
case 1:
/* recheck for [SPF] */
break;
case 2:
return NULL;
default:
return se;
}
}
/* simple special names */
switch (*s) {
case '0':
case '#':
case 'S':
case 'P':
case 'F':
s++;
return s;
case '*':
s++;
if (*s == '*')
s++;
return s;
/* option names */
case '-':
s++;
if (risalnum(*s))
s++;
else
return NULL;
if (*s == '*')
s++;
return s;
}
/* argument names */
if (risdigit(*s)) {
s++;
while (risdigit(*s))
s++;
return s;
}
/* invalid macro name */
return NULL;
}
/**
* The main macro recursion loop.
* @param mb macro expansion state
* @param src string to expand
* @return 0 on success, 1 on failure
*/
static int
expandMacro(MacroBuf mb, const char *src, size_t slen)
{
rpmMacroEntry *mep;
rpmMacroEntry me;
const char *s = src, *se;
const char *f, *fe;
const char *g, *ge;
size_t fn, gn, tpos;
int c;
int rc = 0;
int negate;
const char * lastc;
int chkexist;
char *source = NULL;
/*
* Always make a (terminated) copy of the source string.
* Beware: avoiding the copy when src is known \0-terminated seems like
* an obvious opportunity for optimization, but doing that breaks
* a special case of macro undefining itself.
*/
if (!slen)
slen = strlen(src);
source = xmalloc(slen + 1);
strncpy(source, src, slen);
source[slen] = '\0';
s = source;
if (mb->buf == NULL) {
size_t blen = MACROBUFSIZ + slen;
mb->buf = xmalloc(blen + 1);
mb->buf[0] = '\0';
mb->tpos = 0;
mb->nb = blen;
}
tpos = mb->tpos; /* save expansion pointer for printExpand */
if (++mb->depth > max_macro_depth) {
rpmlog(RPMLOG_ERR,
_("Too many levels of recursion in macro expansion. It is likely caused by recursive macro declaration.\n"));
mb->depth--;
mb->expand_trace = 1;
_free(source);
return 1;
}
while (rc == 0 && (c = *s) != '\0') {
s++;
/* Copy text until next macro */
switch(c) {
case '%':
if (*s) { /* Ensure not end-of-string. */
if (*s != '%')
break;
s++; /* skip first % in %% */
}
default:
mbAppend(mb, c);
continue;
break;
}
/* Expand next macro */
f = fe = NULL;
g = ge = NULL;
if (mb->depth > 1) /* XXX full expansion for outermost level */
tpos = mb->tpos; /* save expansion pointer for printExpand */
negate = 0;
lastc = NULL;
chkexist = 0;
switch ((c = *s)) {
default: /* %name substitution */
f = parseMacroFlags(s, &negate, &chkexist);
fe = parseMacroName(f);
/* no valid name? assume as-is substitution */
if (fe == NULL) {
mbAppend(mb, '%');
continue;
}
se = fe;
/* For "%name " macros ... */
if ((c = *fe) && isblank(c))
if ((lastc = strchr(fe,'\n')) == NULL)
lastc = strchr(fe, '\0');
break;
case '(': /* %(...) shell escape */
if ((se = matchchar(s, c, ')')) == NULL) {
rpmlog(RPMLOG_ERR,
_("Unterminated %c: %s\n"), (char)c, s);
rc = 1;
continue;
}
if (mb->macro_trace)
printMacro(mb, s, se+1);
s++; /* skip ( */
rc = doShellEscape(mb, s, (se - s));
se++; /* skip ) */
s = se;
continue;
break;
case '{': /* %{...}/%{...:...} substitution */
if ((se = matchchar(s, c, '}')) == NULL) {
rpmlog(RPMLOG_ERR,
_("Unterminated %c: %s\n"), (char)c, s);
rc = 1;
continue;
}
f = parseMacroFlags(s + 1 /* skip { */, &negate, &chkexist);
fe = parseMacroName(f);
se++; /* skip } */
/* no valid name? syntax error */
if (fe == NULL) {
rpmlog(RPMLOG_ERR,
_("Invalid macro name: %%%.*s\n"), (int)(se - s), s);
rc = 1;
continue;
}
switch (*fe) {
case ':':
g = fe + 1;
ge = se - 1;
break;
case ' ':
case '\t':
lastc = se-1;
break;
case '}':
break;
default:
rpmlog(RPMLOG_ERR,
_("Invalid macro syntax: %%%.*s\n"), (int)(se - s), s);
rc = 1;
continue;
}
break;
}
assert(fe > f);
fn = (fe - f);
gn = (ge - g);
if (mb->macro_trace)
printMacro(mb, s, se);
/* Expand builtin macros */
if (STREQ("global", f, fn)) {
s = doDefine(mb, se, RMIL_GLOBAL, 1);
continue;
}
if (STREQ("define", f, fn)) {
s = doDefine(mb, se, mb->depth, 0);
continue;
}
if (STREQ("undefine", f, fn)) {
s = doUndefine(mb->mc, se);
continue;
}
if (STREQ("echo", f, fn) ||
STREQ("warn", f, fn) ||
STREQ("error", f, fn)) {
int waserror = 0;
if (STREQ("error", f, fn))
waserror = 1;
if (g != NULL && g < ge)
doOutput(mb, waserror, g, gn);
else
doOutput(mb, waserror, f, fn);
s = se;
continue;
}
if (STREQ("trace", f, fn)) {
/* XXX TODO restore expand_trace/macro_trace to 0 on return */
mb->expand_trace = mb->macro_trace = (negate ? 0 : mb->depth);
if (mb->depth == 1) {
print_macro_trace = mb->macro_trace;
print_expand_trace = mb->expand_trace;
}
s = se;
continue;
}
if (STREQ("dump", f, fn)) {
rpmDumpMacroTable(mb->mc, NULL);
while (iseol(*se))
se++;
s = se;
continue;
}
#ifdef WITH_LUA
if (STREQ("lua", f, fn)) {
rpmlua lua = NULL; /* Global state. */
const char *ls = s+sizeof("{lua:")-1;
const char *lse = se-sizeof("}")+1;
char *scriptbuf = (char *)xmalloc((lse-ls)+1);
char *printbuf;
memcpy(scriptbuf, ls, lse-ls);
scriptbuf[lse-ls] = '\0';
rpmluaPushPrintBuffer(lua);
if (rpmluaRunScript(lua, scriptbuf, NULL) == -1)
rc = 1;
printbuf = rpmluaPopPrintBuffer(lua);
if (printbuf) {
mbAppendStr(mb, printbuf);
free(printbuf);
}
free(scriptbuf);
s = se;
continue;
}
#endif
/* XXX necessary but clunky */
if (STREQ("basename", f, fn) ||
STREQ("dirname", f, fn) ||
STREQ("suffix", f, fn) ||
STREQ("expand", f, fn) ||
STREQ("verbose", f, fn) ||
STREQ("uncompress", f, fn) ||
STREQ("url2path", f, fn) ||
STREQ("u2p", f, fn) ||
STREQ("getenv", f, fn) ||
STREQ("getconfdir", f, fn) ||
STREQ("S", f, fn) ||
STREQ("P", f, fn) ||
STREQ("F", f, fn)) {
/* FIX: verbose may be set */
doFoo(mb, negate, f, fn, g, gn);
s = se;
continue;
}
/* Expand defined macros */
mep = findEntry(mb->mc, f, fn, NULL);
me = (mep ? *mep : NULL);
/* XXX Special processing for flags */
if (*f == '-') {
if (me)
me->used++; /* Mark macro as used */
if ((me == NULL && !negate) || /* Without -f, skip %{-f...} */
(me != NULL && negate)) { /* With -f, skip %{!-f...} */
s = se;
continue;
}
if (g && g < ge) { /* Expand X in %{-f:X} */
rc = expandMacro(mb, g, gn);
} else
if (me && me->body && *me->body) {/* Expand %{-f}/%{-f*} */
rc = expandMacro(mb, me->body, 0);
}
s = se;
continue;
}
/* XXX Special processing for macro existence */
if (chkexist) {
if ((me == NULL && !negate) || /* Without -f, skip %{?f...} */
(me != NULL && negate)) { /* With -f, skip %{!?f...} */
s = se;
continue;
}
if (g && g < ge) { /* Expand X in %{?f:X} */
rc = expandMacro(mb, g, gn);
} else
if (me && me->body && *me->body) { /* Expand %{?f}/%{?f*} */
rc = expandMacro(mb, me->body, 0);
}
s = se;
continue;
}
if (me == NULL) { /* leave unknown %... as is */
/* XXX hack to permit non-overloaded %foo to be passed */
c = '%'; /* XXX only need to save % */
mbAppend(mb, c);
continue;
}
/* Setup args for "%name " macros with opts */
if (me && me->opts != NULL) {
if (lastc != NULL) {
se = grabArgs(mb, me, fe, lastc);
} else {
pushMacro(mb->mc, "**", NULL, "", mb->depth);
pushMacro(mb->mc, "*", NULL, "", mb->depth);
pushMacro(mb->mc, "#", NULL, "0", mb->depth);
pushMacro(mb->mc, "0", NULL, me->name, mb->depth);
}
}
/* Recursively expand body of macro */
if (me->body && *me->body) {
rc = expandMacro(mb, me->body, 0);
if (rc == 0)
me->used++; /* Mark macro as used */
}
/* Free args for "%name " macros with opts */
if (me->opts != NULL)
freeArgs(mb);
s = se;
}
mb->buf[mb->tpos] = '\0';
mb->depth--;
if (rc != 0 || mb->expand_trace)
printExpansion(mb, mb->buf+tpos, mb->buf+mb->tpos);
_free(source);
return rc;
}
/* =============================================================== */
static int doExpandMacros(rpmMacroContext mc, const char *src, char **target)
{
MacroBuf mb = xcalloc(1, sizeof(*mb));
int rc = 0;
mb->buf = NULL;
mb->depth = 0;
mb->macro_trace = print_macro_trace;
mb->expand_trace = print_expand_trace;
mb->mc = mc;
rc = expandMacro(mb, src, 0);
mb->buf[mb->tpos] = '\0'; /* XXX just in case */
/* expanded output is usually much less than alloced buffer, downsize */
*target = xrealloc(mb->buf, mb->tpos + 1);
_free(mb);
return rc;
}
static void pushMacro(rpmMacroContext mc,
const char * n, const char * o, const char * b, int level)
{
/* new entry */
rpmMacroEntry me;
/* pointer into me */
char *p;
/* calculate sizes */
size_t olen = o ? strlen(o) : 0;
size_t blen = b ? strlen(b) : 0;
size_t mesize = sizeof(*me) + blen + 1 + (olen ? olen + 1 : 0);
size_t pos;
rpmMacroEntry *mep = findEntry(mc, n, 0, &pos);
if (mep) {
/* entry with shared name */
me = xmalloc(mesize);
/* copy body */
me->body = p = me->arena;
if (blen)
memcpy(p, b, blen + 1);
else
*p = '\0';
p += blen + 1;
/* set name */
me->name = (*mep)->name;
}
else {
/* extend macro table */
const int delta = 256;
if (mc->n % delta == 0)
mc->tab = xrealloc(mc->tab, sizeof(me) * (mc->n + delta));
/* shift pos+ entries to the right */
memmove(mc->tab + pos + 1, mc->tab + pos, sizeof(me) * (mc->n - pos));
mc->n++;
/* make slot */
mc->tab[pos] = NULL;
mep = &mc->tab[pos];
/* entry with new name */
size_t nlen = strlen(n);
me = xmalloc(mesize + nlen + 1);
/* copy body */
me->body = p = me->arena;
if (blen)
memcpy(p, b, blen + 1);
else
*p = '\0';
p += blen + 1;
/* copy name */
me->name = memcpy(p, n, nlen + 1);
p += nlen + 1;
}
/* copy options */
if (olen)
me->opts = memcpy(p, o, olen + 1);
else
me->opts = o ? "" : NULL;
/* initialize */
me->used = 0;
me->level = level;
/* push over previous definition */
me->prev = *mep;
*mep = me;
}
static void popMacro(rpmMacroContext mc, const char * n)
{
size_t pos;
rpmMacroEntry *mep = findEntry(mc, n, 0, &pos);
if (mep == NULL)
return;
/* parting entry */
rpmMacroEntry me = *mep;
assert(me);
/* detach/pop definition */
mc->tab[pos] = me->prev;
/* shrink macro table */
if (me->prev == NULL) {
mc->n--;
/* move pos+ elements to the left */
memmove(mc->tab + pos, mc->tab + pos + 1, sizeof(me) * (mc->n - pos));
/* deallocate */
if (mc->n == 0)
mc->tab = _free(mc->tab);
}
/* comes in a single chunk */
free(me);
}
/* External interfaces */
int expandMacros(void * spec, rpmMacroContext mc, char * sbuf, size_t slen)
{
char *target = NULL;
int rc;
mc = rpmmctxAcquire(mc);
rc = doExpandMacros(mc, sbuf, &target);
rpmmctxRelease(mc);
rstrlcpy(sbuf, target, slen);
free(target);
return rc;
}
void
rpmDumpMacroTable(rpmMacroContext mc, FILE * fp)
{
mc = rpmmctxAcquire(mc);
if (fp == NULL) fp = stderr;
fprintf(fp, "========================\n");
for (int i = 0; i < mc->n; i++) {
rpmMacroEntry me = mc->tab[i];
assert(me);
fprintf(fp, "%3d%c %s", me->level,
(me->used > 0 ? '=' : ':'), me->name);
if (me->opts && *me->opts)
fprintf(fp, "(%s)", me->opts);
if (me->body && *me->body)
fprintf(fp, "\t%s", me->body);
fprintf(fp, "\n");
}
fprintf(fp, _("======================== active %d empty %d\n"),
mc->n, 0);
rpmmctxRelease(mc);
}
void addMacro(rpmMacroContext mc,
const char * n, const char * o, const char * b, int level)
{
mc = rpmmctxAcquire(mc);
pushMacro(mc, n, o, b, level);
rpmmctxRelease(mc);
}
void delMacro(rpmMacroContext mc, const char * n)
{
mc = rpmmctxAcquire(mc);
popMacro(mc, n);
rpmmctxRelease(mc);
}
int
rpmDefineMacro(rpmMacroContext mc, const char * macro, int level)
{
MacroBuf mb = xcalloc(1, sizeof(*mb));
/* XXX just enough to get by */
mb->mc = rpmmctxAcquire(mc);
(void) doDefine(mb, macro, level, 0);
rpmmctxRelease(mb->mc);
_free(mb);
return 0;
}
void
rpmLoadMacros(rpmMacroContext mc, int level)
{
rpmMacroContext gmc;
if (mc == NULL || mc == rpmGlobalMacroContext)
return;
gmc = rpmmctxAcquire(NULL);
mc = rpmmctxAcquire(mc);
for (int i = 0; i < mc->n; i++) {
rpmMacroEntry me = mc->tab[i];
assert(me);
pushMacro(gmc, me->name, me->opts, me->body, (level - 1));
}
rpmmctxRelease(mc);
rpmmctxRelease(gmc);
}
int
rpmLoadMacroFile(rpmMacroContext mc, const char * fn)
{
FILE *fd = fopen(fn, "r");
size_t blen = MACROBUFSIZ;
char *buf = xmalloc(blen);
int rc = -1;
if (fd == NULL)
goto exit;
mc = rpmmctxAcquire(mc);
/* XXX Assume new fangled macro expansion */
max_macro_depth = 16;
buf[0] = '\0';
while(rdcl(buf, blen, fd) != NULL) {
char c, *n;
n = buf;
SKIPBLANK(n, c);
if (c != '%')
continue;
n++; /* skip % */
rc = rpmDefineMacro(mc, n, RMIL_MACROFILES);
}
rpmmctxRelease(mc);
rc = fclose(fd);
exit:
_free(buf);
return rc;
}
void
rpmInitMacros(rpmMacroContext mc, const char * macrofiles)
{
ARGV_t pattern, globs = NULL;
if (macrofiles == NULL)
return;
argvSplit(&globs, macrofiles, ":");
mc = rpmmctxAcquire(mc);
for (pattern = globs; *pattern; pattern++) {
ARGV_t path, files = NULL;
/* Glob expand the macro file path element, expanding ~ to $HOME. */
if (rpmGlob(*pattern, NULL, &files) != 0) {
continue;
}
/* Read macros from each file. */
for (path = files; *path; path++) {
if (rpmFileHasSuffix(*path, ".rpmnew") ||
rpmFileHasSuffix(*path, ".rpmsave") ||
rpmFileHasSuffix(*path, ".rpmorig")) {
continue;
}
(void) rpmLoadMacroFile(mc, *path);
}
argvFree(files);
}
rpmmctxRelease(mc);
argvFree(globs);
/* Reload cmdline macros */
rpmLoadMacros(rpmCLIMacroContext, RMIL_CMDLINE);
}
void
rpmFreeMacros(rpmMacroContext mc)
{
mc = rpmmctxAcquire(mc);
while (mc->n > 0) {
/* remove from the end to avoid memmove */
rpmMacroEntry me = mc->tab[mc->n - 1];
popMacro(mc, me->name);
}
rpmmctxRelease(mc);
}
char *
rpmExpand(const char *arg, ...)
{
size_t blen = 0;
char *buf = NULL, *ret = NULL;
char *pe;
const char *s;
va_list ap;
rpmMacroContext mc;
if (arg == NULL) {
ret = xstrdup("");
goto exit;
}
/* precalculate unexpanded size */
va_start(ap, arg);
for (s = arg; s != NULL; s = va_arg(ap, const char *))
blen += strlen(s);
va_end(ap);
buf = xmalloc(blen + 1);
buf[0] = '\0';
va_start(ap, arg);
for (pe = buf, s = arg; s != NULL; s = va_arg(ap, const char *))
pe = stpcpy(pe, s);
va_end(ap);
mc = rpmmctxAcquire(NULL);
(void) doExpandMacros(mc, buf, &ret);
rpmmctxRelease(mc);
free(buf);
exit:
return ret;
}
int
rpmExpandNumeric(const char *arg)
{
char *val;
int rc;
if (arg == NULL)
return 0;
val = rpmExpand(arg, NULL);
if (!(val && *val != '%'))
rc = 0;
else if (*val == 'Y' || *val == 'y')
rc = 1;
else if (*val == 'N' || *val == 'n')
rc = 0;
else {
char *end;
rc = strtol(val, &end, 0);
if (!(end && *end == '\0'))
rc = 0;
}
free(val);
return rc;
}
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