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c89.c
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c89.c
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/*-
* Copyright (c) 2002 Tim J. Robbins.
* All rights reserved.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
*/
/*
* c89 -- compile standard C programs
*
* This is essentially a wrapper around the system C compiler that forces
* the compiler into C89 mode and handles some of the standard libraries
* specially.
*/
#include <sys/cdefs.h>
/* __FBSDID("$FreeBSD: src/usr.bin/c89/c89.c,v 1.2 2002/10/08 02:19:54 tjr Exp $");*/
#include <sys/types.h>
#include <err.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
char **args;
u_int cargs, nargs;
void addarg(const char *);
void addlib(const char *);
void combine_and_addarg (const char *, const char *);
void usage(void);
/* Store -U args. */
char **undef_args;
u_int undef_cargs, undef_nargs;
void record_undef(const char *);
void add_def(const char *);
void combine_and_addarg (const char *, const char *);
int dash_dash_seen = 0;
int
main(int argc, char *argv[])
{
int ch, i;
args = NULL;
cargs = nargs = 0;
while ((ch = getopt(argc, argv, "cD:EgI:L:o:O:sU:l:")) != -1) {
if (ch == 'l') {
/* Gone too far. Back up and get out. */
if (argv[optind - 1][0] == '-')
optind -= 1;
else
optind -= 2;
break;
} else if (ch == '?')
usage();
}
addarg("cc");
addarg("-std=iso9899:1990");
addarg("-pedantic");
addarg("-m32");
for (i = 1; i < optind; i++) {
/* "--" indicates end of options. Radar 3761967. */
if (strcmp (argv[i], "--") == 0)
dash_dash_seen = 1;
/* White space is OK between -O and 1 or 2. Radar 3762315. */
else if (strcmp (argv[i], "-O") == 0) {
if (i+1 < argc) {
if (strcmp (argv[i+1], "1") == 0 || strcmp (argv[i+1], "0") == 0) {
combine_and_addarg(argv[i], argv[i+1]);
i++;
} else
addarg(argv[i]);
}
} else if (strcmp (argv[i], "-U") == 0) {
/* Record undefined macros. */
record_undef (argv[i+1]);
addarg(argv[i]);
addarg(argv[i+1]);
i++;
} else if (strncmp (argv[i], "-U", 2) == 0) {
/* Record undefined macros. */
record_undef (argv[i]+2);
addarg(argv[i]);
} else if (strcmp (argv[i], "-L") == 0 && i+1 < argc) {
combine_and_addarg(argv[i], argv[i+1]);
i++;
} else if (strcmp (argv[i], "-D") == 0) {
add_def (argv[i+1]);
i++;
} else if (strncmp (argv[i], "-D", 2) == 0)
add_def (argv[i]+2);
else
addarg(argv[i]);
}
while (i < argc) {
if (strncmp(argv[i], "-l", 2) == 0) {
if (argv[i][2] != '\0')
addlib(argv[i++] + 2);
else {
if (argv[++i] == NULL)
usage();
addlib(argv[i++]);
}
}
else if (strcmp (argv[i], "-L") == 0 && i+1 < argc) {
combine_and_addarg(argv[i], argv[i+1]);
i+=2;
}
else if (strcmp (argv[i], "--") == 0) {
dash_dash_seen = 1;
} else
addarg(argv[i++]);
}
execv("/usr/bin/cc", args);
err(1, "/usr/bin/cc");
}
/* Combine item1 and item2 and used them as one argument.
This is used to combine "-O" with "1" to make "-O1". */
void
combine_and_addarg (const char *item1, const char *item2)
{
char *item = (char *) malloc (sizeof (char) * (strlen(item1) + strlen(item2) + 1));
strcpy (item, item1);
strcat (item, item2);
addarg (item);
}
/* Record macro undefs on the command line. -U. */
void
record_undef (const char *item)
{
if (undef_nargs + 1 > undef_cargs) {
undef_cargs += 16;
if ((undef_args = realloc(undef_args, sizeof(*undef_args) * undef_cargs)) == NULL)
err(1, "malloc");
}
if ((undef_args[undef_nargs++] = strdup(item)) == NULL)
err(1, "strdup");
undef_args[undef_nargs] = NULL;
}
/* Add command line macro def (-Dblah) in the argument list.
If it is was undefined earlier than do not add. Radar 3762036. */
void
add_def (const char *item)
{
int i;
char *updated_def;
if (strlen (item) > 2)
for (i = 0; i < undef_nargs; i++)
{
if (strcmp (item, undef_args[i]) == 0)
return;
else {
int undef_len = strlen (undef_args[i]);
int def_len = strlen (item);
if (undef_len < def_len) {
const char *p = item + undef_len;
if (*p == '=') {
if (strncmp (item, undef_args[i], undef_len) == 0)
return;
}
}
}
}
updated_def = (char *) malloc (strlen (item) + 3);
sprintf (updated_def,"-D%s",item);
addarg (updated_def);
}
void
addarg(const char *item)
{
if (nargs + 2 > cargs) {
cargs += 16;
if ((args = realloc(args, sizeof(*args) * cargs)) == NULL)
err(1, "malloc");
}
if (dash_dash_seen && strncmp (item, "-", 1) == 0)
{
char *updated_item = (char *) malloc (strlen (item) + 3);
sprintf (updated_item,"./%s",item);
args[nargs++] = updated_item;
}
else
{
args[nargs++] = strdup (item);
}
if (args[nargs-1] == NULL)
err(1, "strdup");
args[nargs] = NULL;
}
void
addlib(const char *lib)
{
if (strcmp(lib, "pthread") == 0)
/* pthread functionality is in libc. */
;
else if (strcmp(lib, "rt") == 0)
/* librt functionality is in libc or unimplemented. */
;
else if (strcmp(lib, "xnet") == 0)
/* xnet functionality is in libc. */
;
else {
addarg("-l");
addarg(lib);
}
}
void
usage(void)
{
fprintf(stderr,
"usage: c89 [-cEgs] [-D name[=value]] [-I directory] ... [-L directory] ...\n");
fprintf(stderr,
" [-o outfile] [-O optlevel] [-U name]... operand ...\n");
exit(1);
}