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/* ISC license. */
#include <sys/stat.h>
#include <fcntl.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <skalibs/sgetopt.h>
#include <skalibs/strerr2.h>
#include <skalibs/direntry.h>
#define USAGE "mdevd-coldplug [ -s slashsys ]"
#define dieusage() strerr_dieusage(100, USAGE)
static void scan_subdir (int fdat, char const *pathat, char const *list)
{
DIR *dir ;
int fdlist = openat(fdat, list, O_RDONLY | O_DIRECTORY) ;
if (fdlist < 0) strerr_diefu4sys(111, "open ", pathat, "/", list) ;
dir = fdopendir(fdlist) ;
if (!dir) strerr_diefu4sys(111, "fdopendir ", pathat, "/", list) ;
for (;;)
{
direntry *d ;
errno = 0 ;
d = readdir(dir) ;
if (!d) break ;
if (d->d_name[0] == '.') continue ;
{
int fd ;
size_t dlen = strlen(d->d_name) ;
char fn[dlen + 8] ;
memcpy(fn, d->d_name, dlen) ;
memcpy(fn + dlen, "/uevent", 8) ;
fd = openat(fdlist, fn, O_WRONLY) ;
if (fd < 0)
{
strerr_warnwu6sys("open ", pathat, "/", list, "/", fn) ;
continue ;
}
if (write(fd, "add\n", 4) < 4)
strerr_warnwu6sys("write to ", pathat, "/", list, "/", fn) ;
close(fd) ;
}
}
if (errno) strerr_diefu4sys(111, "readdir ", pathat, "/", list) ;
dir_close(dir) ;
}
static int scan_dir (char const *path, int add_devices)
{
DIR *dir ;
int fdpath = open(path, O_RDONLY | O_DIRECTORY) ;
if (fdpath < 0) return 0 ;
dir = fdopendir(fdpath) ;
if (!dir) strerr_diefu2sys(111, "fdopendir ", path) ;
for (;;)
{
direntry *d ;
errno = 0 ;
d = readdir(dir) ;
if (!d) break ;
if (d->d_name[0] == '.') continue ;
if (add_devices)
{
size_t dlen = strlen(d->d_name) ;
char fn[dlen + 9] ;
memcpy(fn, d->d_name, dlen) ;
memcpy(fn + dlen, "/devices", 9) ;
scan_subdir(fdpath, path, fn) ;
}
else scan_subdir(fdpath, path, d->d_name) ;
}
if (errno) strerr_diefu2sys(111, "readdir ", path) ;
dir_close(dir) ;
return 1 ;
}
int main (int argc, char const *const *argv, char const *const *envp)
{
char const *slashsys = "/sys" ;
PROG = "mdevd-coldplug" ;
{
subgetopt_t l = SUBGETOPT_ZERO ;
for (;;)
{
int opt = subgetopt_r(argc, argv, "s:", &l) ;
if (opt == -1) break ;
switch (opt)
{
case 's' : slashsys = l.arg ; break ;
default : dieusage() ;
}
}
argc -= l.ind ; argv += l.ind ;
}
{
size_t slashsyslen = strlen(slashsys) ;
char fn[slashsyslen + 11] ;
memcpy(fn, slashsys, slashsyslen) ;
memcpy(fn + slashsyslen, "/subsystem", 11) ;
if (!scan_dir(fn, 1))
{
memcpy(fn + slashsyslen + 1, "class", 6) ;
if (!scan_dir(fn, 0)) strerr_diefu2sys(111, "open ", fn) ;
memcpy(fn + slashsyslen + 1, "bus", 4) ;
if (!scan_dir(fn, 1)) strerr_diefu2sys(111, "open ", fn) ;
}
}
return 0 ;
}
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