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/* ISC license. */
#include <string.h>
#include <unistd.h>
#include <sys/stat.h>
#include <sys/uio.h>
#include <skalibs/types.h>
#include <skalibs/buffer.h>
#include <skalibs/djbunix.h>
#include <skalibs/strerr.h>
#include <s6/auto.h>
void s6_auto_write_service (char const *dir, unsigned int nfd, s6_buffer_writer_func_ref f, void *data, char const *logger)
{
int fd ;
buffer b ;
size_t dirlen = strlen(dir) ;
mode_t m = umask(0) ;
char buf[4096] ;
char fn[dirlen + 17] ;
if (mkdir(dir, 0755) == -1) strerr_diefu2sys(111, "mkdir ", dir) ;
umask(m) ;
memcpy(fn, dir, dirlen) ;
if (nfd)
{
char fmt[UINT_FMT] ;
size_t l = uint_fmt(fmt, nfd) ;
fmt[l++] = '\n' ;
memcpy(fn + dirlen, "/notification-fd", 17) ;
if (!openwritenclose_unsafe(fn, fmt, l)) strerr_diefu2sys(111, "write to ", fn) ;
}
memcpy(fn + dirlen, "/run", 5) ;
fd = open_trunc(fn) ;
if (fd == -1) strerr_diefu2sys(111, "open ", fn) ;
buffer_init(&b, &buffer_write, fd, buf, 4096) ;
if (!(*f)(&b, data)) strerr_diefu2sys(111, "write to ", fn) ;
fd_close(fd) ;
if (logger)
{
memcpy(fn + dirlen + 1, "type", 5) ;
if (!openwritenclose_unsafe(fn, "longrun\n", 8)) strerr_diefu2sys(111, "write to ", fn) ;
if (logger[0])
{
struct iovec v[2] = { { .iov_base = (char *)logger, .iov_len = strlen(logger) }, { .iov_base = "\n", .iov_len = 1 } } ;
memcpy(fn + dirlen + 1, "producer-for", 13) ;
if (!openwritevnclose_unsafe(fn, v, 2)) strerr_diefu2sys(111, "write to ", fn) ;
}
}
else
{
if (chmod(fn, (~m & 0666) | ((~m >> 2) & 0111)) < 0)
strerr_diefu2sys(111, "chmod ", fn) ;
if (!(~m & 0400))
strerr_warnw2x("weird umask, check permissions manually on ", fn) ;
}
}
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