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/* ISC license. */
#include <unistd.h>
#include <errno.h>
#include <skalibs/ushort.h>
#include <skalibs/uint.h>
#include <skalibs/bytestr.h>
#include <skalibs/sgetopt.h>
#include <skalibs/strerr2.h>
#include <skalibs/djbunix.h>
#include <execline/config.h>
#include <execline/execline.h>
#define USAGE "forbacktickx [ -p | -o okcode,okcode,... | -x breakcode,breakcode,... ] [ -n ] [ -C | -c ] [ -0 | -d delim ] var { backtickcmd... } command..."
#define dieusage() strerr_dieusage(100, USAGE)
#define DELIM_DEFAULT " \n\r\t"
int main (int argc, char const *const *argv, char const *const *envp)
{
char const *delim = DELIM_DEFAULT ;
char const *codes = 0 ;
int crunch = 0, chomp = 0, not = 1, par = 0 ;
PROG = "forbacktickx" ;
{
subgetopt_t l = SUBGETOPT_ZERO ;
for (;;)
{
register int opt = subgetopt_r(argc, argv, "epnCc0d:o:x:", &l) ;
if (opt == -1) break ;
switch (opt)
{
case 'e' : break ; /* compat */
case 'p' : par = 1 ; break ;
case 'n' : chomp = 1 ; break ;
case 'C' : crunch = 1 ; break ;
case 'c' : crunch = 0 ; break ;
case '0' : delim = 0 ; break ;
case 'd' : delim = l.arg ; break ;
case 'o' :
{
unsigned short okcodes[256] ;
unsigned int nbc ; /* XXX */
if (!ushort_scanlist(okcodes, 256, l.arg, &nbc)) dieusage() ;
codes = l.arg ;
not = 0 ;
break ;
}
case 'x' :
{
unsigned short okcodes[256] ;
unsigned int nbc ; /* XXX */
if (!ushort_scanlist(okcodes, 256, l.arg, &nbc)) dieusage() ;
codes = l.arg ;
not = 1 ;
break ;
}
default : dieusage() ;
}
}
argc -= l.ind ; argv += l.ind ;
}
if (argc < 2) dieusage() ;
if (!argv[0][0]) dieusage() ;
if (!argv[1][0]) strerr_dief1x(100, "empty block") ;
{
unsigned int m = 0, i = 1 ;
int fd = dup(0) ;
char const *newargv[argc + 18] ;
char fmt[UINT_FMT] ;
if (fd < 0)
{
if (errno != EBADF) strerr_diefu1sys(111, "dup stdin") ;
}
else fmt[uint_fmt(fmt, (unsigned int)fd)] = 0 ;
newargv[m++] = EXECLINE_BINPREFIX "pipeline" ;
newargv[m++] = "--" ;
while (argv[i] && argv[i][0] != EXECLINE_BLOCK_END_CHAR && (!EXECLINE_BLOCK_END_CHAR || (argv[i][0] && argv[i][1])))
newargv[m++] = argv[i++] ;
if (!argv[i]) strerr_dief1x(100, "unterminated block") ;
newargv[m++] = "" ; i++ ;
newargv[m++] = EXECLINE_BINPREFIX "unexport" ;
newargv[m++] = "!" ;
newargv[m++] = EXECLINE_BINPREFIX "forstdin" ;
if (par) newargv[m++] = "-p" ;
if (chomp) newargv[m++] = "-n" ;
if (crunch) newargv[m++] = "-C" ;
if (!delim) newargv[m++] = "-0" ;
else if (str_diff(delim, DELIM_DEFAULT))
{
newargv[m++] = "-d" ;
newargv[m++] = delim ;
}
if (codes)
{
newargv[m++] = not ? "-x" : "-o" ;
newargv[m++] = codes ;
}
newargv[m++] = "--" ;
newargv[m++] = argv[0] ;
if (fd < 0)
{
newargv[m++] = EXECLINE_BINPREFIX "fdclose" ;
newargv[m++] = "0" ;
}
else
{
newargv[m++] = EXECLINE_BINPREFIX "fdmove" ;
newargv[m++] = "0" ;
newargv[m++] = fmt ;
}
while (argv[i]) newargv[m++] = argv[i++] ;
newargv[m++] = 0 ;
pathexec_run(newargv[0], newargv, envp) ;
strerr_dieexec(111, newargv[0]) ;
}
}
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