diff options
Diffstat (limited to 'toys/other/mkswap.c')
| -rw-r--r-- | toys/other/mkswap.c | 18 |
1 files changed, 15 insertions, 3 deletions
diff --git a/toys/other/mkswap.c b/toys/other/mkswap.c index ff864244..49e0b942 100644 --- a/toys/other/mkswap.c +++ b/toys/other/mkswap.c @@ -2,24 +2,30 @@ * * Copyright 2009 Rob Landley <rob@landley.net> -USE_MKSWAP(NEWTOY(mkswap, "<1>1", TOYFLAG_SBIN)) +USE_MKSWAP(NEWTOY(mkswap, "<1>1L:", TOYFLAG_SBIN)) config MKSWAP bool "mkswap" default y help - usage: mkswap DEVICE + usage: mkswap [-L LABEL] DEVICE Sets up a Linux swap area on a device or file. */ +#define FOR_mkswap #include "toys.h" +GLOBALS( + char *L; +) + void mkswap_main(void) { int fd = xopen(*toys.optargs, O_RDWR), pagesize = sysconf(_SC_PAGE_SIZE); off_t len = fdlength(fd); unsigned int pages = (len/pagesize)-1, *swap = (unsigned int *)toybuf; + char *label = (char *)(swap+7), *uuid = (char *)(swap+3); // Write header. Note that older kernel versions checked signature // on disk (not in cache) during swapon, so sync after writing. @@ -27,6 +33,8 @@ void mkswap_main(void) swap[0] = 1; swap[1] = pages; xlseek(fd, 1024, SEEK_SET); + create_uuid(uuid); + if (TT.L) strncpy(label, TT.L, 15); xwrite(fd, swap, 129*sizeof(unsigned int)); xlseek(fd, pagesize-10, SEEK_SET); xwrite(fd, "SWAPSPACE2", 10); @@ -34,5 +42,9 @@ void mkswap_main(void) if (CFG_TOYBOX_FREE) close(fd); - printf("Swapspace size: %luk\n", pages*(unsigned long)(pagesize/1024)); + if (TT.L) sprintf(toybuf, ", LABEL=%s", label); + else *toybuf = 0; + printf("Swapspace size: %luk%s, UUID=%s\n", + pages*(unsigned long)(pagesize/1024), + toybuf, show_uuid(uuid)); } |