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incubator-nuttx/tools/mkdeps.c

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/****************************************************************************
* tools/mkdeps.c
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#define _FILE_OFFSET_BITS 64
#include <sys/stat.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <limits.h>
#include <ctype.h>
#include <libgen.h>
#include <errno.h>
#include <dirent.h>
#ifdef HOST_CYGWIN
# include <sys/cygwin.h>
#endif
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
#define MAX_BUFFER (8192)
#define MAX_EXPAND (2048)
#define MAX_SHQUOTE (2048)
/* MAX_PATH might be defined in stdlib.h */
#if !defined(MAX_PATH)
# define MAX_PATH (512)
#endif
/* NAME_MAX is typically defined in limits.h */
#if !defined(NAME_MAX)
/* FILENAME_MAX might be defined in stdio.h */
# if defined(FILENAME_MAX)
# define NAME_MAX FILENAME_MAX
# else
/* MAXNAMELEN might be defined in dirent.h */
# if defined(MAXNAMLEN)
# define NAME_MAX MAXNAMLEN
# else
/* Lets not let a silly think like this stop us... just make something up */
# define NAME_MAX 256
# endif
# endif
#endif
/****************************************************************************
* Private Types
****************************************************************************/
enum slashmode_e
{
MODE_FSLASH = 0,
MODE_BSLASH = 1,
MODE_DBLBACK = 2
};
/****************************************************************************
* Private Data
****************************************************************************/
static char *g_cc = NULL;
static char *g_cflags = NULL;
static char *g_files = NULL;
static char *g_altpath = NULL;
static char *g_objpath = NULL;
static char *g_suffix = ".o";
static int g_debug = 0;
static bool g_winnative = false;
#ifdef HOST_CYGWIN
static bool g_winpath = false;
#endif
static char g_command[MAX_BUFFER];
static char g_path[MAX_PATH];
#ifdef HOST_CYGWIN
static char g_expand[MAX_EXPAND];
static char g_dequoted[MAX_PATH];
static char g_posixpath[MAX_PATH];
#endif
static char g_shquote[MAX_SHQUOTE];
/****************************************************************************
* Private Functions
****************************************************************************/
/* MinGW does not seem to provide strtok_r */
#ifndef HAVE_STRTOK_R
static char *my_strtok_r(char *str, const char *delim, char **saveptr)
{
char *pbegin;
char *pend = NULL;
/* Decide if we are starting a new string or continuing from
* the point we left off.
*/
if (str)
{
pbegin = str;
}
else if (saveptr && *saveptr)
{
pbegin = *saveptr;
}
else
{
return NULL;
}
/* Find the beginning of the next token */
for (;
*pbegin && strchr(delim, *pbegin) != NULL;
pbegin++);
/* If we are at the end of the string with nothing
* but delimiters found, then return NULL.
*/
if (!*pbegin)
{
return NULL;
}
/* Find the end of the token */
for (pend = pbegin + 1;
*pend && strchr(delim, *pend) == NULL;
pend++);
/* pend either points to the end of the string or to
* the first delimiter after the string.
*/
if (*pend)
{
/* Turn the delimiter into a null terminator */
*pend++ = '\0';
}
/* Save the pointer where we left off and return the
* beginning of the token.
*/
if (saveptr)
{
*saveptr = pend;
}
return pbegin;
}
#undef strtok_r
#define strtok_r my_strtok_r
#endif
static void append(char **base, const char *str)
{
char *oldbase;
char *newbase;
int alloclen;
oldbase = *base;
if (!oldbase)
{
newbase = strdup(str);
if (!newbase)
{
fprintf(stderr, "ERROR: Failed to strdup %s\n", str);
exit(EXIT_FAILURE);
}
}
else
{
alloclen = strlen(oldbase) + strlen(str) +
sizeof((char) ' ') + sizeof((char) '\0');
newbase = (char *)malloc(alloclen);
if (!newbase)
{
fprintf(stderr, "ERROR: Failed to allocate %d bytes\n", alloclen);
exit(EXIT_FAILURE);
}
snprintf(newbase, alloclen, "%s %s", oldbase, str);
free(oldbase);
}
*base = newbase;
}
static void show_usage(const char *progname, const char *msg, int exitcode)
{
if (msg)
{
fprintf(stderr, "\n");
fprintf(stderr, "%s:\n", msg);
}
fprintf(stderr, "\n");
fprintf(stderr, "%s [OPTIONS] CC -- CFLAGS -- file [file [file...]]\n",
progname);
fprintf(stderr, "\n");
fprintf(stderr, "Where:\n");
fprintf(stderr, " CC\n");
fprintf(stderr, " A variable number of arguments that define how to\n");
fprintf(stderr, " execute the compiler\n");
fprintf(stderr, " CFLAGS\n");
fprintf(stderr, " The compiler compilation flags\n");
fprintf(stderr, " file\n");
fprintf(stderr, " One or more C files whose dependencies will be\n");
fprintf(stderr, " checked. Each file is expected\n");
fprintf(stderr, " to reside in the current directory unless\n");
fprintf(stderr, " --dep-path is provided on the command line\n");
fprintf(stderr, "\n");
fprintf(stderr, "And [OPTIONS] include:\n");
fprintf(stderr, " --dep-debug\n");
fprintf(stderr, " Enable script debug\n");
fprintf(stderr, " --dep-path <path>\n");
fprintf(stderr, " Do not look in the current directory for the\n");
fprintf(stderr, " file. Instead, look in <path> to see\n");
fprintf(stderr, " if the file resides there. --dep-path may be\n");
fprintf(stderr, " used multiple times to specify\n");
fprintf(stderr, " multiple alternative location\n");
fprintf(stderr, " --obj-path <path>\n");
fprintf(stderr, " The final objects will not reside in this path\n");
fprintf(stderr, " but, rather, at the path provided by\n");
fprintf(stderr, " <path>. if provided multiple time, only the last\n");
fprintf(stderr, " --obj-path will be used.\n");
fprintf(stderr, " --obj-suffix <suffix>\n");
fprintf(stderr, " If an object path is provided, then the extension\n");
fprintf(stderr, " will be assumed to be .o. This\n");
fprintf(stderr, " default suffix can be overridden with this\n");
fprintf(stderr, " command line option.\n");
fprintf(stderr, " --winnative\n");
fprintf(stderr, " By default, a POSIX-style environment is assumed\n");
fprintf(stderr, " (e.g., Linux, Cygwin, etc.) This option is\n");
fprintf(stderr, " inform the tool that is working in a pure Windows\n");
fprintf(stderr, " native environment.\n");
#ifdef HOST_CYGWIN
fprintf(stderr, " --winpaths\n");
fprintf(stderr, " This option is useful when using a Windows native\n");
fprintf(stderr, " toolchain in a POSIX environment (such such as\n");
fprintf(stderr, " Cygwin). In this case, will CC\n");
fprintf(stderr, " generates dependency lists using Windows paths\n");
fprintf(stderr, " (e.g., C:\\blablah\\blabla).\n");
#endif
fprintf(stderr, " --help\n");
fprintf(stderr, " Shows this message and exits\n");
exit(exitcode);
}
/****************************************************************************
* Name: do_shquote
*
* Description:
* Escape the given string for use with the shell.
*
* The idea was taken from:
* https://netbsd.gw.com/cgi-bin/man-cgi?shquote++NetBSD-current
* However, this implementation doesn't try to elide extraneous quotes.
****************************************************************************/
static const char *do_shquote(const char *argument)
{
const char *src;
char *dest;
int len;
src = argument;
dest = g_shquote;
len = 0;
if (len < sizeof(g_shquote))
{
*dest++ = '\'';
len++;
}
while (*src && len < sizeof(g_shquote))
{
if (*src == '\'')
{
/* Expand single quote to '\'' */
if (len + 4 > sizeof(g_shquote))
{
break;
}
src++;
memcpy(dest, "\'\\\'\'", 4);
dest += 4;
len += 4;
}
else
{
*dest++ = *src++;
len++;
}
}
if (*src || len + 2 > sizeof(g_shquote))
{
fprintf(stderr,
"ERROR: Truncated during shquote string is too long"
"[%zu/%zu]\n", strlen(argument), sizeof(g_shquote));
exit(EXIT_FAILURE);
}
*dest++ = '\'';
*dest = '\0';
return g_shquote;
}
static void parse_args(int argc, char **argv)
{
char *args = NULL;
int argidx;
int group = 0;
/* Always look in the current directory */
g_altpath = strdup(".");
/* Accumulate CFLAGS up to "--" */
for (argidx = 1; argidx < argc; argidx++)
{
if (strcmp(argv[argidx], "--") == 0)
{
g_cc = g_cflags;
g_cflags = args;
args = NULL;
group++;
}
else if (strcmp(argv[argidx], "--dep-debug") == 0)
{
g_debug++;
}
else if (strcmp(argv[argidx], "--dep-path") == 0)
{
argidx++;
if (argidx >= argc)
{
show_usage(argv[0], "ERROR: Missing argument to --dep-path",
EXIT_FAILURE);
}
if (args)
{
append(&args, argv[argidx]);
}
else
{
append(&g_altpath, argv[argidx]);
}
}
else if (strcmp(argv[argidx], "--obj-path") == 0)
{
argidx++;
if (argidx >= argc)
{
show_usage(argv[0], "ERROR: Missing argument to --obj-path",
EXIT_FAILURE);
}
g_objpath = argv[argidx];
}
else if (strcmp(argv[argidx], "--obj-suffix") == 0)
{
argidx++;
if (argidx >= argc)
{
show_usage(argv[0], "ERROR: Missing argument to --obj-suffix",
EXIT_FAILURE);
}
g_suffix = argv[argidx];
}
else if (strcmp(argv[argidx], "--winnative") == 0)
{
g_winnative = true;
}
#ifdef HOST_CYGWIN
else if (strcmp(argv[argidx], "--winpath") == 0)
{
g_winpath = true;
}
#endif
else if (strcmp(argv[argidx], "--help") == 0)
{
show_usage(argv[0], NULL, EXIT_SUCCESS);
}
else
{
const char *arg = argv[argidx];
/* This condition means "perform shquote for
* g_cflags, but not g_cc or g_files".
*
* It isn't safe to escape g_cc because, for some reasons,
* Makefile passes it as a single argument like:
*
* $(MKDEP) $(DEPPATH) "$(CC)" -- $(CFLAGS) -- $(SRCS)
*
* It isn't safe to escape g_files because
* do_dependency() uses them as bare filenames as well.
* (In addition to passing them to system().)
*/
if (group == 1)
{
arg = do_shquote(arg);
}
append(&args, arg);
}
}
/* The final thing accumulated is the list of files */
g_files = args;
if (g_debug)
{
fprintf(stderr, "SELECTIONS\n");
fprintf(stderr, " CC : [%s]\n",
g_cc ? g_cc : "(None)");
fprintf(stderr, " CFLAGS : [%s]\n",
g_cflags ? g_cflags : "(None)");
fprintf(stderr, " FILES : [%s]\n",
g_files ? g_files : "(None)");
fprintf(stderr, " PATHS : [%s]\n",
g_altpath ? g_altpath : "(None)");
if (g_objpath)
{
fprintf(stderr, " OBJDIR : [%s]\n", g_objpath);
fprintf(stderr, " SUFFIX : [%s]\n", g_suffix);
}
else
{
fprintf(stderr, " OBJDIR : (None)\n");
}
#ifdef HOST_CYGWIN
fprintf(stderr, " Windows Paths : [%s]\n",
g_winpath ? "TRUE" : "FALSE");
#endif
fprintf(stderr, " Windows Native : [%s]\n",
g_winnative ? "TRUE" : "FALSE");
}
/* Check for required parameters */
if (!g_cc)
{
show_usage(argv[0], "ERROR: No compiler specified", EXIT_FAILURE);
}
if (!g_files)
{
/* Don't report an error --
* this happens normally in some configurations
*/
printf("# No files specified for dependency generation\n");
exit(EXIT_SUCCESS);
}
#ifdef HOST_CYGWIN
if (g_winnative && g_winpath)
{
show_usage(argv[0],
"ERROR: Both --winnative and --winpath makes no sense",
EXIT_FAILURE);
}
#endif
}
static const char *do_expand(const char *argument)
{
#ifdef HOST_CYGWIN
if (g_winpath)
{
const char *src;
char *dest;
int len;
src = argument;
dest = g_expand;
len = 0;
while (*src && len < MAX_EXPAND)
{
if (*src == '\\')
{
/* Copy backslash */
*dest++ = *src++;
if (++len >= MAX_EXPAND)
{
break;
}
/* Already expanded? */
if (*src == '\\')
{
/* Yes... just copy all consecutive backslashes */
do
{
*dest++ = *src++;
if (++len >= MAX_EXPAND)
{
break;
}
}
while (*src == '\\');
}
else
{
/* No.. expeand */
*dest++ = '\\';
if (++len >= MAX_EXPAND)
{
break;
}
}
}
else
{
*dest++ = *src++;
len++;
}
}
if (*src)
{
fprintf(stderr,
"ERROR: Truncated during expansion string is too long"
"[%zu/%u]\n", strlen(argument), MAX_EXPAND);
exit(EXIT_FAILURE);
}
*dest = '\0';
return g_expand;
}
else
#endif
{
return argument;
}
}
#ifdef HOST_CYGWIN
static bool dequote_path(const char *winpath)
{
char *dest = g_dequoted;
const char *src = winpath;
int len = 0;
bool quoted = false;
while (*src && len < MAX_PATH)
{
if (*src != '\\' || (src[1] != ' ' && src[1] != '(' && src[1] != ')'))
{
*dest++ = *src;
len++;
}
else
{
quoted = true;
}
src++;
}
if (*src || len >= MAX_PATH)
{
fprintf(stderr, "# ERROR: Path truncated\n");
exit(EXIT_FAILURE);
}
*dest = '\0';
return quoted;
}
#endif
static const char *convert_path(const char *path)
{
#ifdef HOST_CYGWIN
if (g_winpath)
{
const char *retptr;
ssize_t size;
ssize_t ret;
bool quoted;
quoted = dequote_path(path);
if (quoted)
{
retptr = g_posixpath;
}
else
{
retptr = &g_posixpath[1];
}
size = cygwin_conv_path(CCP_POSIX_TO_WIN_A | CCP_RELATIVE, g_dequoted,
NULL, 0);
if (size > (MAX_PATH - 3))
{
fprintf(stderr, "# ERROR: POSIX path too long: %zd\n", size);
exit(EXIT_FAILURE);
}
ret = cygwin_conv_path(CCP_POSIX_TO_WIN_A | CCP_RELATIVE, g_dequoted,
&g_posixpath[1], MAX_PATH - 3);
if (ret < 0)
{
fprintf(stderr, "# ERROR: cygwin_conv_path '%s' failed: %s\n",
g_dequoted, strerror(errno));
exit(EXIT_FAILURE);
}
if (quoted)
{
size++;
g_posixpath[0] = '"';
g_posixpath[size] = '"';
}
g_posixpath[size + 1] = '\0';
return retptr;
}
else
#endif
{
return path;
}
}
static void do_dependency(const char *file)
{
static const char moption[] = " -M ";
struct stat buf;
char *alloc;
char *altpath;
char *path;
char *lasts;
char separator;
int cmdlen;
int pathlen;
int filelen;
int totallen;
int ret;
/* Initialize the separator */
#ifdef HOST_CYGWIN
separator = (g_winnative || g_winpath) ? '\\' : '/';
#else
separator = g_winnative ? '\\' : '/';
#endif
/* Copy the compiler into the command buffer */
cmdlen = strlen(g_cc);
if (cmdlen >= MAX_BUFFER)
{
fprintf(stderr, "ERROR: Compiler string is too long [%d/%d]: %s\n",
cmdlen, MAX_BUFFER, g_cc);
exit(EXIT_FAILURE);
}
strcpy(g_command, g_cc);
/* Copy " -MT " */
if (g_objpath)
{
char tmp[NAME_MAX + 6];
char *dupname;
char *objname;
char *dotptr;
const char *expanded;
dupname = strdup(file);
if (!dupname)
{
fprintf(stderr, "ERROR: Failed to dup: %s\n", file);
exit(EXIT_FAILURE);
}
objname = basename(dupname);
dotptr = strrchr(objname, '.');
if (dotptr)
{
*dotptr = '\0';
}
snprintf(tmp, NAME_MAX + 6, " -MT %s%c%s%s ",
g_objpath, separator, objname, g_suffix);
expanded = do_expand(tmp);
cmdlen += strlen(expanded);
if (cmdlen >= MAX_BUFFER)
{
fprintf(stderr, "ERROR: Option string is too long [%d/%d]: %s\n",
cmdlen, MAX_BUFFER, moption);
exit(EXIT_FAILURE);
}
strcat(g_command, expanded);
free(dupname);
}
/* Copy " -M " */
cmdlen += strlen(moption);
if (cmdlen >= MAX_BUFFER)
{
fprintf(stderr, "ERROR: Option string is too long [%d/%d]: %s\n",
cmdlen, MAX_BUFFER, moption);
exit(EXIT_FAILURE);
}
strcat(g_command, moption);
/* Copy the CFLAGS into the command buffer */
if (g_cflags)
{
const char *expanded;
expanded = do_expand(g_cflags);
cmdlen += strlen(expanded);
if (cmdlen >= MAX_BUFFER)
{
fprintf(stderr, "ERROR: CFLAG string is too long [%d/%d]: %s\n",
cmdlen, MAX_BUFFER, g_cflags);
exit(EXIT_FAILURE);
}
strcat(g_command, expanded);
}
/* Add a space */
g_command[cmdlen] = ' ';
cmdlen++;
g_command[cmdlen] = '\0';
/* Make a copy of g_altpath. We need to do this because at least the
* version of strtok_r above does modify it.
*/
alloc = strdup(g_altpath);
if (!alloc)
{
fprintf(stderr, "ERROR: Failed to strdup paths\n");
exit(EXIT_FAILURE);
}
altpath = alloc;
/* Try each path. This loop will continue until each path has been tried
* (failure) or until stat() finds the file
*/
while ((path = strtok_r(altpath, " ", &lasts)) != NULL)
{
const char *expanded;
const char *converted;
/* Create a full path to the file */
pathlen = strlen(path);
if (pathlen >= MAX_PATH)
{
fprintf(stderr, "ERROR: Path is too long [%d/%d]: %s\n",
pathlen, MAX_PATH, path);
exit(EXIT_FAILURE);
}
strcpy(g_path, path);
if (g_path[pathlen] != '\0')
{
fprintf(stderr, "ERROR: Missing NUL terminator\n");
exit(EXIT_FAILURE);
}
if (g_path[pathlen - 1] != separator)
{
g_path[pathlen] = separator;
g_path[pathlen + 1] = '\0';
pathlen++;
}
filelen = strlen(file);
pathlen += filelen;
if (pathlen >= MAX_PATH)
{
fprintf(stderr, "ERROR: Path+file is too long [%d/%d]\n",
pathlen, MAX_PATH);
exit(EXIT_FAILURE);
}
strcat(g_path, file);
/* Check that a file actually exists at this path */
if (g_debug)
{
fprintf(stderr, "Trying path=%s file=%s fullpath=%s\n",
path, file, g_path);
}
converted = convert_path(g_path);
ret = stat(converted, &buf);
if (ret < 0)
{
altpath = NULL;
continue;
}
if (!S_ISREG(buf.st_mode))
{
fprintf(stderr,
"ERROR: File %s exists but is not a regular file\n",
g_path);
exit(EXIT_FAILURE);
}
/* Append the expanded path to the command */
expanded = do_expand(g_path);
pathlen = strlen(expanded);
totallen = cmdlen + pathlen;
if (totallen >= MAX_BUFFER)
{
fprintf(stderr, "ERROR: Path string is too long [%d/%d]: %s\n",
totallen, MAX_BUFFER, g_path);
exit(EXIT_FAILURE);
}
strcat(g_command, expanded);
/* Okay.. we have everything. Create the dependency. One a failure
* to start the compiler, system() will return -1; Otherwise, the
* returned value from the compiler is in WEXITSTATUS(ret).
*/
if (g_debug)
{
fprintf(stderr, "Executing: %s\n", g_command);
}
ret = system(g_command);
#ifdef WEXITSTATUS
if (ret < 0 || WEXITSTATUS(ret) != 0)
{
if (ret < 0)
{
fprintf(stderr, "ERROR: system failed: %s\n", strerror(errno));
}
else
{
fprintf(stderr,
"ERROR: %s failed: %d\n", g_cc, WEXITSTATUS(ret));
}
fprintf(stderr, " command: %s\n", g_command);
exit(EXIT_FAILURE);
}
#else
if (ret < 0)
{
fprintf(stderr, "ERROR: system failed: %s\n", strerror(errno));
fprintf(stderr, " command: %s\n", g_command);
exit(EXIT_FAILURE);
}
#endif
/* We don't really know that the command succeeded...
* Let's assume that it did
*/
free(alloc);
return;
}
printf("# ERROR: File \"%s\" not found at any location\n", file);
exit(EXIT_FAILURE);
}
/****************************************************************************
* Public Functions
****************************************************************************/
int main(int argc, char **argv, char **envp)
{
char *lasts;
char *files;
char *file;
/* Parse command line parameters */
parse_args(argc, argv);
/* Then generate dependencies for each path on the command line. NOTE
* strtok_r will clobber the files list. But that is okay because we are
* only going to traverse it once.
*/
files = g_files;
while ((file = strtok_r(files, " ", &lasts)) != NULL)
{
/* Check if we need to do path conversions for a Windows-natvive tool
* being using in a POSIX/Cygwin environment.
*/
do_dependency(file);
files = NULL;
}
return EXIT_SUCCESS;
}
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