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/* ISC license. */
#include <unistd.h>
#include <sys/types.h>
#include <sys/swap.h>
#include <errno.h>
#include <skalibs/bytestr.h>
#include <skalibs/buffer.h>
#include <skalibs/strerr.h>
#include <skalibs/stralloc.h>
#include <skalibs/djbunix.h>
#include <skalibs/skamisc.h>
#define USAGE "s6-swapoff device <or> s6-swapoff -a"
static int swapoffall (void)
{
char buf[4096] ;
buffer b ;
stralloc sa = STRALLOC_ZERO ;
int e = 0 ;
int r ;
int fd = open_readb("/proc/swaps") ;
if (fd < 0) strerr_diefu1sys(111, "open_readb /proc/swaps") ;
buffer_init(&b, &buffer_read, fd, buf, 4096) ;
if (skagetln(&b, &sa, '\n') < 0) strerr_diefu1sys(111, "skagetln") ;
for (;;)
{
size_t n ;
sa.len = 0 ;
r = skagetln(&b, &sa, '\n') ;
if (r < 0) strerr_diefu1sys(111, "skagetln") ;
if (!r) break ;
n = byte_chr(sa.s, sa.len, ' ') ;
if (n >= sa.len) strerr_dief1x(111, "invalid line in /proc/swaps") ;
sa.s[n] = 0 ;
if (swapoff(sa.s) < 0) { e++ ; strerr_warnwu2sys("swapoff ", sa.s) ; }
}
fd_close(fd) ;
stralloc_free(&sa) ;
return e ;
}
int main (int argc, char const *const *argv)
{
PROG = "s6-swapoff" ;
if (argc < 2) strerr_dieusage(100, USAGE) ;
if ((argv[1][0] == '-') && (argv[1][1] == 'a') && !argv[1][2])
return swapoffall() ;
if (swapoff(argv[1]) == -1) strerr_diefu2sys(111, "swapoff ", argv[1]) ;
return 0 ;
}
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