51 lines
1.4 KiB
C
51 lines
1.4 KiB
C
|
/*
|
|||
|
|
* A wrapper around execlineb, which provides all execline
|
|||
|
|
* tools on execlineb’s PATH.
|
|||
|
|
* It is implemented as a C program, because on non-Linux,
|
|||
|
|
* nested shebang lines are not supported.
|
|||
|
|
*/
|
|||
|
|
|
|||
|
|
#include <stdlib.h>
|
|||
|
|
#include <string.h>
|
|||
|
|
|
|||
|
|
#include <skalibs/stralloc.h>
|
|||
|
|
#include <skalibs/djbunix.h>
|
|||
|
|
#include <skalibs/strerr2.h>
|
|||
|
|
#include <skalibs/env.h>
|
|||
|
|
|
|||
|
|
#define dienomem() strerr_diefu1sys(111, "stralloc_catb")
|
|||
|
|
|
|||
|
|
// macros from outside
|
|||
|
|
/* const char* EXECLINEB_PATH; */
|
|||
|
|
/* const char* EXECLINE_BIN_PATH; */
|
|||
|
|
|
|||
|
|
int main(int argc, char const* argv[], char const *const *envp)
|
|||
|
|
{
|
|||
|
|
PROG = "execlineb-wrapper";
|
|||
|
|
|
|||
|
|
char const* path = getenv("PATH");
|
|||
|
|
stralloc path_modif = STRALLOC_ZERO;
|
|||
|
|
|
|||
|
|
// modify PATH if unset or EXECLINEB_BIN_PATH is not yet there
|
|||
|
|
if ( !path || ! strstr(path, EXECLINE_BIN_PATH())) {
|
|||
|
|
// prepend our execline path
|
|||
|
|
if ( ! stralloc_cats(&path_modif, "PATH=")
|
|||
|
|
|| ! stralloc_cats(&path_modif, EXECLINE_BIN_PATH()) ) dienomem();
|
|||
|
|
// old path was not empty
|
|||
|
|
if ( path && path[0] ) {
|
|||
|
|
if ( ! stralloc_catb(&path_modif, ":", 1)
|
|||
|
|
|| ! stralloc_cats(&path_modif, path) ) dienomem();
|
|||
|
|
}
|
|||
|
|
// append final \0
|
|||
|
|
if ( ! stralloc_0(&path_modif) ) dienomem();
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// exec into execlineb and append path_modif to the environment
|
|||
|
|
xpathexec_r_name(
|
|||
|
|
EXECLINEB_PATH(),
|
|||
|
|
argv,
|
|||
|
|
envp, env_len(envp),
|
|||
|
|
path_modif.s, path_modif.len
|
|||
|
|
);
|
|||
|
|
}
|