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/* ISC license. */
#include <string.h>
#include <sys/stat.h>
#include <errno.h>
#include <sys/uio.h>
#include <skalibs/types.h>
#include <skalibs/bytestr.h>
#include <skalibs/sgetopt.h>
#include <skalibs/strerr.h>
#include <skalibs/djbunix.h>
#define USAGE "s6-dumpenv [ -N | -n ] [ -m mode ] envdir"
#define dieusage() strerr_dieusage(100, USAGE)
int main (int argc, char const *const *argv, char const *const *envp)
{
unsigned int mode = S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH ;
int chomp = 0 ;
size_t dirlen ;
PROG = "s6-dumpenv" ;
{
subgetopt l = SUBGETOPT_ZERO ;
for (;;)
{
int opt = subgetopt_r(argc, argv, "nNm:", &l) ;
if (opt == -1) break ;
switch (opt)
{
case 'n' : chomp = 0 ; break ;
case 'N' : chomp = 1 ; break ;
case 'm' : if (!uint0_oscan(l.arg, &mode)) dieusage() ; break ;
default : dieusage() ;
}
}
argc -= l.ind ; argv += l.ind ;
}
if (!argc) dieusage() ;
if (mkdir(argv[0], mode) < 0)
{
struct stat st ;
if (errno != EEXIST) strerr_diefu2sys(111, "mkdir ", argv[0]) ;
if (stat(argv[0], &st) < 0)
strerr_diefu2sys(111, "stat ", argv[0]) ;
if (!S_ISDIR(st.st_mode))
{
errno = ENOTDIR ;
strerr_diefu2sys(111, "mkdir ", argv[0]) ;
}
}
dirlen = strlen(argv[0]) ;
for (; *envp ; envp++)
{
size_t varlen = str_chr(*envp, '=') ;
struct iovec const v[2] =
{
{ .iov_base = (char *)*envp + varlen + 1, .iov_len = strlen(*envp + varlen + 1) },
{ .iov_base = "\n", .iov_len = 1 }
} ;
char fn[dirlen + varlen + 2] ;
memcpy(fn, argv[0], dirlen) ;
fn[dirlen] = '/' ;
memcpy(fn + dirlen + 1, *envp, varlen) ;
fn[dirlen + 1 + varlen] = 0 ;
if (!openwritevnclose_suffix(fn, v, 1 + chomp, "=.tmp"))
strerr_diefu2sys(111, "open ", fn) ;
}
return 0 ;
}
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