Mercurial > hg > toybox
changeset 1317:94e143a0089f draft
I have attached a patch adding a program that allows re-reading the partition table. This is often used on embedded systems booting from SD/USB devices that need to resize partitions on first boot.
author | Bertold Van den Bergh <vandenbergh@bertold.org> |
---|---|
date | Sun, 25 May 2014 20:49:51 -0500 |
parents | 160ea67a200d |
children | 955169e818d0 |
files | toys/pending/partprobe.c |
diffstat | 1 files changed, 51 insertions(+), 0 deletions(-) [+] |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/toys/pending/partprobe.c Sun May 25 20:49:51 2014 -0500 @@ -0,0 +1,51 @@ +/* partprobe.c - Tell the kernel about partition table changes + * + * Copyright 2014 Bertold Van den Bergh <vandenbergh@bertold.org> + * + * see http://man7.org/linux/man-pages/man8/partprobe.8.html + +USE_PARTPROBE(NEWTOY(partprobe, NULL, TOYFLAG_SBIN)) + +config PARTPROBE + bool "partprobe" + default n + help + partprobe - Tell the kernel about partition table changes + + usage: partprobe [devices...] + + Asks the kernel to re-read the partition table on the specified + devices. +*/ + +#include "toys.h" + +void update_device(char* path) +{ + int sd_fd = open(path, 0); + + if(sd_fd < 0){ + perror_msg("Unable to open %s", path); + return; + } + + if(ioctl(sd_fd, BLKRRPART, NULL) < 0) + perror_msg("ioctl (BLKRRPART) failed, old layout still used"); + + close(sd_fd); +} + +void partprobe_main(void) +{ + char** opt; + if(*toys.optargs == NULL){ + printf("No devices specified.\n"); + exit(EXIT_FAILURE); + } + + for (opt = toys.optargs; *opt; opt++) { + update_device(*opt); + } + + exit(EXIT_SUCCESS); +}