mirror of
https://github.com/sheumann/hush.git
synced 2024-08-17 00:29:03 +00:00
399 lines
9.6 KiB
C
399 lines
9.6 KiB
C
/*
|
||
* docproc is a simple preprocessor for the template files
|
||
* used as placeholders for the kernel internal documentation.
|
||
* docproc is used for documentation-frontend and
|
||
* dependency-generator.
|
||
* The two usages have in common that they require
|
||
* some knowledge of the .tmpl syntax, therefore they
|
||
* are kept together.
|
||
*
|
||
* documentation-frontend
|
||
* Scans the template file and call kernel-doc for
|
||
* all occurrences of ![EIF]file
|
||
* Beforehand each referenced file are scanned for
|
||
* any exported sympols "EXPORT_SYMBOL()" statements.
|
||
* This is used to create proper -function and
|
||
* -nofunction arguments in calls to kernel-doc.
|
||
* Usage: docproc doc file.tmpl
|
||
*
|
||
* dependency-generator:
|
||
* Scans the template file and list all files
|
||
* referenced in a format recognized by make.
|
||
* Usage: docproc depend file.tmpl
|
||
* Writes dependency information to stdout
|
||
* in the following format:
|
||
* file.tmpl src.c src2.c
|
||
* The filenames are obtained from the following constructs:
|
||
* !Efilename
|
||
* !Ifilename
|
||
* !Dfilename
|
||
* !Ffilename
|
||
*
|
||
*/
|
||
|
||
#include <stdio.h>
|
||
#include <stdlib.h>
|
||
#include <string.h>
|
||
#include <ctype.h>
|
||
#include <unistd.h>
|
||
#include <limits.h>
|
||
#include <sys/types.h>
|
||
#include <sys/wait.h>
|
||
|
||
/* exitstatus is used to keep track of any failing calls to kernel-doc,
|
||
* but execution continues. */
|
||
int exitstatus = 0;
|
||
|
||
typedef void DFL(char *);
|
||
DFL *defaultline;
|
||
|
||
typedef void FILEONLY(char * file);
|
||
FILEONLY *internalfunctions;
|
||
FILEONLY *externalfunctions;
|
||
FILEONLY *symbolsonly;
|
||
|
||
typedef void FILELINE(char * file, char * line);
|
||
FILELINE * singlefunctions;
|
||
FILELINE * entity_system;
|
||
|
||
#define MAXLINESZ 2048
|
||
#define MAXFILES 250
|
||
#define KERNELDOCPATH "scripts/"
|
||
#define KERNELDOC "kernel-doc"
|
||
#define DOCBOOK "-docbook"
|
||
#define FUNCTION "-function"
|
||
#define NOFUNCTION "-nofunction"
|
||
|
||
void usage (void)
|
||
{
|
||
fprintf(stderr, "Usage: docproc {doc|depend} file\n");
|
||
fprintf(stderr, "Input is read from file.tmpl. Output is sent to stdout\n");
|
||
fprintf(stderr, "doc: frontend when generating kernel documentation\n");
|
||
fprintf(stderr, "depend: generate list of files referenced within file\n");
|
||
}
|
||
|
||
/*
|
||
* Execute kernel-doc with parameters givin in svec
|
||
*/
|
||
void exec_kernel_doc(char **svec)
|
||
{
|
||
pid_t pid;
|
||
int ret;
|
||
char real_filename[PATH_MAX + 1];
|
||
/* Make sure output generated so far are flushed */
|
||
fflush(stdout);
|
||
switch(pid=fork()) {
|
||
case -1:
|
||
perror("fork");
|
||
exit(1);
|
||
case 0:
|
||
memset(real_filename, 0, sizeof(real_filename));
|
||
strncat(real_filename, getenv("SRCTREE"), PATH_MAX);
|
||
strncat(real_filename, KERNELDOCPATH KERNELDOC,
|
||
PATH_MAX - strlen(real_filename));
|
||
execvp(real_filename, svec);
|
||
fprintf(stderr, "exec ");
|
||
perror(real_filename);
|
||
exit(1);
|
||
default:
|
||
waitpid(pid, &ret ,0);
|
||
}
|
||
if (WIFEXITED(ret))
|
||
exitstatus |= WEXITSTATUS(ret);
|
||
else
|
||
exitstatus = 0xff;
|
||
}
|
||
|
||
/* Types used to create list of all exported symbols in a number of files */
|
||
struct symbols
|
||
{
|
||
char *name;
|
||
};
|
||
|
||
struct symfile
|
||
{
|
||
char *filename;
|
||
struct symbols *symbollist;
|
||
int symbolcnt;
|
||
};
|
||
|
||
struct symfile symfilelist[MAXFILES];
|
||
int symfilecnt = 0;
|
||
|
||
void add_new_symbol(struct symfile *sym, char * symname)
|
||
{
|
||
sym->symbollist =
|
||
realloc(sym->symbollist, (sym->symbolcnt + 1) * sizeof(char *));
|
||
sym->symbollist[sym->symbolcnt++].name = strdup(symname);
|
||
}
|
||
|
||
/* Add a filename to the list */
|
||
struct symfile * add_new_file(char * filename)
|
||
{
|
||
symfilelist[symfilecnt++].filename = strdup(filename);
|
||
return &symfilelist[symfilecnt - 1];
|
||
}
|
||
/* Check if file already are present in the list */
|
||
struct symfile * filename_exist(char * filename)
|
||
{
|
||
int i;
|
||
for (i=0; i < symfilecnt; i++)
|
||
if (strcmp(symfilelist[i].filename, filename) == 0)
|
||
return &symfilelist[i];
|
||
return NULL;
|
||
}
|
||
|
||
/*
|
||
* List all files referenced within the template file.
|
||
* Files are separated by tabs.
|
||
*/
|
||
void adddep(char * file) { printf("\t%s", file); }
|
||
void adddep2(char * file, char * line) { line = line; adddep(file); }
|
||
void noaction(char * line) { line = line; }
|
||
void noaction2(char * file, char * line) { file = file; line = line; }
|
||
|
||
/* Echo the line without further action */
|
||
void printline(char * line) { printf("%s", line); }
|
||
|
||
/*
|
||
* Find all symbols exported with EXPORT_SYMBOL and EXPORT_SYMBOL_GPL
|
||
* in filename.
|
||
* All symbols located are stored in symfilelist.
|
||
*/
|
||
void find_export_symbols(char * filename)
|
||
{
|
||
FILE * fp;
|
||
struct symfile *sym;
|
||
char line[MAXLINESZ];
|
||
if (filename_exist(filename) == NULL) {
|
||
char real_filename[PATH_MAX + 1];
|
||
memset(real_filename, 0, sizeof(real_filename));
|
||
strncat(real_filename, getenv("SRCTREE"), PATH_MAX);
|
||
strncat(real_filename, filename,
|
||
PATH_MAX - strlen(real_filename));
|
||
sym = add_new_file(filename);
|
||
fp = fopen(real_filename, "r");
|
||
if (fp == NULL)
|
||
{
|
||
fprintf(stderr, "docproc: ");
|
||
perror(real_filename);
|
||
}
|
||
while (fgets(line, MAXLINESZ, fp)) {
|
||
char *p;
|
||
char *e;
|
||
if (((p = strstr(line, "EXPORT_SYMBOL_GPL")) != 0) ||
|
||
((p = strstr(line, "EXPORT_SYMBOL")) != 0)) {
|
||
/* Skip EXPORT_SYMBOL{_GPL} */
|
||
while (isalnum(*p) || *p == '_')
|
||
p++;
|
||
/* Remove paranteses and additional ws */
|
||
while (isspace(*p))
|
||
p++;
|
||
if (*p != '(')
|
||
continue; /* Syntax error? */
|
||
else
|
||
p++;
|
||
while (isspace(*p))
|
||
p++;
|
||
e = p;
|
||
while (isalnum(*e) || *e == '_')
|
||
e++;
|
||
*e = '\0';
|
||
add_new_symbol(sym, p);
|
||
}
|
||
}
|
||
fclose(fp);
|
||
}
|
||
}
|
||
|
||
/*
|
||
* Document all external or internal functions in a file.
|
||
* Call kernel-doc with following parameters:
|
||
* kernel-doc -docbook -nofunction function_name1 filename
|
||
* function names are obtained from all the the src files
|
||
* by find_export_symbols.
|
||
* intfunc uses -nofunction
|
||
* extfunc uses -function
|
||
*/
|
||
void docfunctions(char * filename, char * type)
|
||
{
|
||
int i,j;
|
||
int symcnt = 0;
|
||
int idx = 0;
|
||
char **vec;
|
||
|
||
for (i=0; i <= symfilecnt; i++)
|
||
symcnt += symfilelist[i].symbolcnt;
|
||
vec = malloc((2 + 2 * symcnt + 2) * sizeof(char*));
|
||
if (vec == NULL) {
|
||
perror("docproc: ");
|
||
exit(1);
|
||
}
|
||
vec[idx++] = KERNELDOC;
|
||
vec[idx++] = DOCBOOK;
|
||
for (i=0; i < symfilecnt; i++) {
|
||
struct symfile * sym = &symfilelist[i];
|
||
for (j=0; j < sym->symbolcnt; j++) {
|
||
vec[idx++] = type;
|
||
vec[idx++] = sym->symbollist[j].name;
|
||
}
|
||
}
|
||
vec[idx++] = filename;
|
||
vec[idx] = NULL;
|
||
printf("<!-- %s -->\n", filename);
|
||
exec_kernel_doc(vec);
|
||
fflush(stdout);
|
||
free(vec);
|
||
}
|
||
void intfunc(char * filename) { docfunctions(filename, NOFUNCTION); }
|
||
void extfunc(char * filename) { docfunctions(filename, FUNCTION); }
|
||
|
||
/*
|
||
* Document sp<73>ecific function(s) in a file.
|
||
* Call kernel-doc with the following parameters:
|
||
* kernel-doc -docbook -function function1 [-function function2]
|
||
*/
|
||
void singfunc(char * filename, char * line)
|
||
{
|
||
char *vec[200]; /* Enough for specific functions */
|
||
int i, idx = 0;
|
||
int startofsym = 1;
|
||
vec[idx++] = KERNELDOC;
|
||
vec[idx++] = DOCBOOK;
|
||
|
||
/* Split line up in individual parameters preceeded by FUNCTION */
|
||
for (i=0; line[i]; i++) {
|
||
if (isspace(line[i])) {
|
||
line[i] = '\0';
|
||
startofsym = 1;
|
||
continue;
|
||
}
|
||
if (startofsym) {
|
||
startofsym = 0;
|
||
vec[idx++] = FUNCTION;
|
||
vec[idx++] = &line[i];
|
||
}
|
||
}
|
||
vec[idx++] = filename;
|
||
vec[idx] = NULL;
|
||
exec_kernel_doc(vec);
|
||
}
|
||
|
||
/*
|
||
* Parse file, calling action specific functions for:
|
||
* 1) Lines containing !E
|
||
* 2) Lines containing !I
|
||
* 3) Lines containing !D
|
||
* 4) Lines containing !F
|
||
* 5) Default lines - lines not matching the above
|
||
*/
|
||
void parse_file(FILE *infile)
|
||
{
|
||
char line[MAXLINESZ];
|
||
char * s;
|
||
while (fgets(line, MAXLINESZ, infile)) {
|
||
if (line[0] == '!') {
|
||
s = line + 2;
|
||
switch (line[1]) {
|
||
case 'E':
|
||
while (*s && !isspace(*s)) s++;
|
||
*s = '\0';
|
||
externalfunctions(line+2);
|
||
break;
|
||
case 'I':
|
||
while (*s && !isspace(*s)) s++;
|
||
*s = '\0';
|
||
internalfunctions(line+2);
|
||
break;
|
||
case 'D':
|
||
while (*s && !isspace(*s)) s++;
|
||
*s = '\0';
|
||
symbolsonly(line+2);
|
||
break;
|
||
case 'F':
|
||
/* filename */
|
||
while (*s && !isspace(*s)) s++;
|
||
*s++ = '\0';
|
||
/* function names */
|
||
while (isspace(*s))
|
||
s++;
|
||
singlefunctions(line +2, s);
|
||
break;
|
||
default:
|
||
defaultline(line);
|
||
}
|
||
}
|
||
else {
|
||
defaultline(line);
|
||
}
|
||
}
|
||
fflush(stdout);
|
||
}
|
||
|
||
|
||
int main(int argc, char **argv)
|
||
{
|
||
FILE * infile;
|
||
if (argc != 3) {
|
||
usage();
|
||
exit(1);
|
||
}
|
||
/* Open file, exit on error */
|
||
infile = fopen(argv[2], "r");
|
||
if (infile == NULL) {
|
||
fprintf(stderr, "docproc: ");
|
||
perror(argv[2]);
|
||
exit(2);
|
||
}
|
||
|
||
if (strcmp("doc", argv[1]) == 0)
|
||
{
|
||
/* Need to do this in two passes.
|
||
* First pass is used to collect all symbols exported
|
||
* in the various files.
|
||
* Second pass generate the documentation.
|
||
* This is required because function are declared
|
||
* and exported in different files :-((
|
||
*/
|
||
/* Collect symbols */
|
||
defaultline = noaction;
|
||
internalfunctions = find_export_symbols;
|
||
externalfunctions = find_export_symbols;
|
||
symbolsonly = find_export_symbols;
|
||
singlefunctions = noaction2;
|
||
parse_file(infile);
|
||
|
||
/* Rewind to start from beginning of file again */
|
||
fseek(infile, 0, SEEK_SET);
|
||
defaultline = printline;
|
||
internalfunctions = intfunc;
|
||
externalfunctions = extfunc;
|
||
symbolsonly = printline;
|
||
singlefunctions = singfunc;
|
||
|
||
parse_file(infile);
|
||
}
|
||
else if (strcmp("depend", argv[1]) == 0)
|
||
{
|
||
/* Create first part of dependency chain
|
||
* file.tmpl */
|
||
printf("%s\t", argv[2]);
|
||
defaultline = noaction;
|
||
internalfunctions = adddep;
|
||
externalfunctions = adddep;
|
||
symbolsonly = adddep;
|
||
singlefunctions = adddep2;
|
||
parse_file(infile);
|
||
printf("\n");
|
||
}
|
||
else
|
||
{
|
||
fprintf(stderr, "Unknown option: %s\n", argv[1]);
|
||
exit(1);
|
||
}
|
||
fclose(infile);
|
||
fflush(stdout);
|
||
return exitstatus;
|
||
}
|
||
|