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/*
* Hardcode some pathnames into an existing executable.
*
* This program is used when installing clisp binaries on a system which
* lacks an ANSI C compiler in its default configuration (such as Solaris
* or HP-UX).
*
* Usage: hardcode [-Dname=value]... input.exe output.exe
*
* Bruno Haible 17.5.1999
*/
/* Declare strchr(), strcmp(), strcpy(). */
#include <string.h>
/* Declare malloc(). */
#include <stdlib.h>
/* Declare stderr, fprintf(). */
#include <stdio.h>
/* Declare open(), read(), creat(), write(), chmod(), close(). */
#include <unistd.h>
#include <fcntl.h>
/* Declare fstat(). */
#include <sys/types.h>
#include <sys/stat.h>
/* Declare perror() on some systems. Define EINTR. */
#include <errno.h>
struct substitution {
struct substitution* next;
const char* name;
const char* value;
};
int main (int argc, char* argv[])
{
struct substitution* defs = NULL;
const char* input = NULL;
const char* output = NULL;
const char* program_name = argv[0];
/* Check arguments. */
{
int i;
for (i = 1; i < argc; i++) {
char* arg = argv[i];
if (arg[0] == '-') {
if (arg[1] == 'D') {
char* equals = strchr(&arg[2],'=');
if (equals) {
struct substitution* newdef = (struct substitution*) malloc(sizeof(struct substitution));
newdef->name = &arg[2];
*equals = '\0';
newdef->value = equals+1;
newdef->next = defs;
defs = newdef;
continue;
}
}
} else {
if (!input) {
input = arg;
continue;
}
if (!output) {
output = arg;
continue;
}
}
goto usage;
}
}
if (!input || !output) goto usage;
/* Eat the file. */
{
int inputfd;
int outputfd;
struct stat inputstat;
int buflen;
char* buf;
/* Read the input file. */
inputfd = open(input,O_RDONLY);
if (inputfd < 0) {
perror(input);
exit(1);
}
if (fstat(inputfd,&inputstat) < 0) {
perror(input);
exit(1);
}
buflen = inputstat.st_size;
buf = (char*) malloc(buflen+1);
if (!buf) {
errno = ENOMEM;
perror(program_name);
exit(1);
}
{
int count = 0;
while (count < buflen) {
int n = read(inputfd,buf+count,buflen-count);
if (n < 0) {
if (errno != EINTR) {
perror(input);
exit(1);
}
} else if (n == 0) {
fprintf(stderr,"Cannot read all of %s\n",input);
exit(1);
} else
count += n;
}
}
buf[buflen] = '\0'; /* so we can use strchr() and strcmp() in the buffer */
close(inputfd);
/* Replace all values. */
{
char* ptr;
for (ptr = buf; ptr+7 < buf+buflen; ptr++) {
if (ptr[0] == '%'
&& ptr[1] == 'M'
&& ptr[2] == 'A'
&& ptr[3] == 'G'
&& ptr[4] == 'I'
&& ptr[5] == 'C'
&& ptr[6] == '%') {
char* assignment = ptr+7;
char* equals = strchr(ptr,'=');
if (!equals) {
fprintf(stderr,"Malformed contents in %s\n",input);
exit(1);
}
*equals = '\0';
{
struct substitution* def;
for (def = defs; def != NULL; def = def->next) {
if (!strcmp(def->name,assignment)) {
strcpy(equals+1,def->value);
break;
}
}
if (def == NULL) {
fprintf(stderr,"Warning: No replacement given for %s\n",assignment);
}
}
*equals = '=';
}
}
}
/* Write the output file. */
outputfd = creat(output,0644);
if (outputfd < 0) {
perror(output);
exit(1);
}
{
int count = 0;
while (count < buflen) {
int n = write(outputfd,buf+count,buflen-count);
if (n < 0) {
if (errno != EINTR) {
perror(output);
exit(1);
}
} else if (n == 0) {
fprintf(stderr,"Disk full while writing to %s\n",output);
exit(1);
} else
count += n;
}
}
close(outputfd);
if (chmod(output,0755) < 0) {
perror(output);
exit(1);
}
}
return 0;
usage:
fprintf(stderr, "Usage: %s [-Dname=value]... input.exe output.exe\n", program_name);
exit(1);
}
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