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/* Description: wrapper for gs to correctly read the papersize
in (/etc/papersize), for Debian systems.
Copyright: GPL
Author: Joost Witteveen <joost@rulcmc.leidenuniv.nl>
Modified by: Marco Pistore <pistore@di.unipi.it>
*/
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <paper.h>
/* the real gs executable (in the case GSREAL is not defined
in the environment) */
char default_binary[] = "/usr/lib/ghostscript/3.33/gs.real";
/* the device for svgalibs */
#define SVGADEVICE "-sDEVICE=lvga256"
/* these options are used to set paper size */
#define GSPAPERSIZE "-sPAPERSIZE="
#define GSPAPERWIDTH "-dDEVICEWIDTHPOINTS="
#define GSPAPERHEIGHT "-dDEVICEHEIGHTPOINTS="
#define GSOTHERWIDTH "-dDEVICEWIDTH="
#define GSOTHERHEIGHT "-dDEVICEHEIGHT="
void add_argument(char ***as,char *s){
/* this adds aguments to the beginning of the
argument list, so that the user is able to override them */
int l;
char **a=*as;
char *t=malloc(strlen(s)+1);
strcpy(t,s);
for(l=0;a&&a[l];l++);
if(!(*as=(char **) malloc(sizeof(char *)*(l+2)))){
fprintf(stderr,"not enough memory, aborting.");
exit(1);
}
(*as)[0]=a[0];
(*as)[1]=t;
(*as)[l+1]=NULL;
while(--l)
(*as)[l+1]=a[l];
free(a);
}
int shortcmp(char *s, char *t){
return strncmp(s,t,strlen(t));
}
void main (int argc, char ** argv){
char b[100];
char **arg;
const struct paper *papinfo;
char *binary;
binary = getenv("GSREAL");
if (! binary)
binary = default_binary;
if(geteuid()!=getuid()){
fprintf(stderr,
"Error (gs wrapper): the gs wrapper should _not_ be setuid.\n"
"If you want to run gs setuid, make %s setuid.\n"
"(See /usr/doc/gs/setuid for more info)\n", binary);
}
if(!(arg=(char**)malloc((argc+1)*sizeof(*argv)))){
fprintf(stderr,"not enough memory, aborting.");
exit(1);
}
memcpy(arg,argv,(argc+1)*sizeof(*argv));
argv=arg;
/*check value of /etc/papersize, but only use it if no
other value is issued (need to check, as "-sPAPERSIZE" does
not override an earlier issued "-dDEVICEPAPER" etc.)
*/
for(arg=argv;
*arg&&(shortcmp(*arg,GSPAPERWIDTH)&&
shortcmp(*arg,GSPAPERHEIGHT)&&
shortcmp(*arg,GSOTHERWIDTH)&&
shortcmp(*arg,GSOTHERHEIGHT)&&
shortcmp(*arg,GSPAPERSIZE)&&
shortcmp(*arg,"-g="));
arg++);
if(!*arg){
paperinit();
if((papinfo=paperinfo(systempapername()))){
sprintf(b,GSPAPERWIDTH "%d",(int)paperpswidth(papinfo));
add_argument(&argv,b);
sprintf(b,GSPAPERHEIGHT "%d",(int)paperpsheight(papinfo));
add_argument(&argv,b);
paperdone();
}
}
/*if running on console, need add "-sDEVICE=lvga256"
(if user specified other -sDEVICE, this is OK, as user
options always come later on the commandline)*/
if(!getenv("DISPLAY") || !strcmp("",getenv("DISPLAY")))
add_argument(&argv, SVGADEVICE);
execv(binary,argv);
fprintf(stderr,"Error (gs wrapper): could not exec %s.", binary);
}
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