From 7aa651a6a4496d848f86de9b1e6b3a003256a01f Mon Sep 17 00:00:00 2001 From: Rob Landley Date: Tue, 13 Nov 2012 17:14:08 -0600 Subject: Reindent to two spaces per level. Remove vi: directives that haven't worked right in years (ubuntu broke its' vim implementation). Remove trailing spaces. Add/remove blank lines. Re-wordwrap in places. Update documentation with new coding style. The actual code should be the same afterward, this is just cosmetic refactoring. --- toys/other/switch_root.c | 130 +++++++++++++++++++++++------------------------ 1 file changed, 65 insertions(+), 65 deletions(-) (limited to 'toys/other/switch_root.c') diff --git a/toys/other/switch_root.c b/toys/other/switch_root.c index 6451ec15..1dfa20de 100644 --- a/toys/other/switch_root.c +++ b/toys/other/switch_root.c @@ -5,16 +5,16 @@ USE_SWITCH_ROOT(NEWTOY(switch_root, "<2c:h", TOYFLAG_SBIN)) config SWITCH_ROOT - bool "switch_root" - default y - help - usage: switch_root [-c /dev/console] NEW_ROOT NEW_INIT... + bool "switch_root" + default y + help + usage: switch_root [-c /dev/console] NEW_ROOT NEW_INIT... - Use from PID 1 under initramfs to free initramfs, chroot to NEW_ROOT, - and exec NEW_INIT. + Use from PID 1 under initramfs to free initramfs, chroot to NEW_ROOT, + and exec NEW_INIT. - -c Redirect console to device in NEW_ROOT - -h Hang instead of exiting on failure (avoids kernel panic) + -c Redirect console to device in NEW_ROOT + -h Hang instead of exiting on failure (avoids kernel panic) */ #define FOR_switch_root @@ -22,72 +22,72 @@ config SWITCH_ROOT #include GLOBALS( - char *console; + char *console; - dev_t rootdev; + dev_t rootdev; ) static int del_node(struct dirtree *node) { - if (node->st.st_dev == TT.rootdev && dirtree_notdotdot(node)) { - int flag = 0; - if (S_ISDIR(node->st.st_mode)) { - if (node->data != -1) return DIRTREE_COMEAGAIN; - flag = AT_REMOVEDIR; - } - unlinkat(dirtree_parentfd(node), node->name, flag); - } - - return 0; + if (node->st.st_dev == TT.rootdev && dirtree_notdotdot(node)) { + int flag = 0; + if (S_ISDIR(node->st.st_mode)) { + if (node->data != -1) return DIRTREE_COMEAGAIN; + flag = AT_REMOVEDIR; + } + unlinkat(dirtree_parentfd(node), node->name, flag); + } + + return 0; } void switch_root_main(void) { - char *newroot = *toys.optargs, **cmdline = toys.optargs+1; - struct stat st1, st2; - struct statfs stfs; - int console = console; // gcc's "may be used" warnings are broken. - - if (getpid() != 1) error_exit("not pid 1"); - - // Root filesystem we're leaving must be ramfs or tmpfs - if (statfs("/", &stfs) || - (stfs.f_type != 0x858458f6 && stfs.f_type != 0x01021994)) - { - error_msg("not ramfs"); - goto panic; - } - - // New directory must be different filesystem instance - if (chdir(newroot) || stat(".", &st1) || stat("/", &st2) || - st1.st_dev == st2.st_dev) - { - error_msg("bad newroot '%s'", newroot); - goto panic; - } - TT.rootdev=st2.st_dev; - - // init program must exist and be an executable file - if (stat("init", &st1) || !S_ISREG(st1.st_mode) || !(st1.st_mode&0100)) { - error_msg("bad init"); - goto panic; - } - - if (TT.console && -1 == (console = open(TT.console, O_RDWR))) { - perror_msg("bad console '%s'", TT.console); - goto panic; - } + char *newroot = *toys.optargs, **cmdline = toys.optargs+1; + struct stat st1, st2; + struct statfs stfs; + int console = console; // gcc's "may be used" warnings are broken. + + if (getpid() != 1) error_exit("not pid 1"); + + // Root filesystem we're leaving must be ramfs or tmpfs + if (statfs("/", &stfs) || + (stfs.f_type != 0x858458f6 && stfs.f_type != 0x01021994)) + { + error_msg("not ramfs"); + goto panic; + } + + // New directory must be different filesystem instance + if (chdir(newroot) || stat(".", &st1) || stat("/", &st2) || + st1.st_dev == st2.st_dev) + { + error_msg("bad newroot '%s'", newroot); + goto panic; + } + TT.rootdev=st2.st_dev; + + // init program must exist and be an executable file + if (stat("init", &st1) || !S_ISREG(st1.st_mode) || !(st1.st_mode&0100)) { + error_msg("bad init"); + goto panic; + } + + if (TT.console && -1 == (console = open(TT.console, O_RDWR))) { + perror_msg("bad console '%s'", TT.console); + goto panic; + } - // Ok, enough safety checks: wipe root partition. - dirtree_read("/", del_node); - - if (TT.console) { - int i; - for (i=0; i<3; i++) if (console != i) dup2(console, i); - if (console>2) close(console); - } - execv(*cmdline, cmdline); - perror_msg("Failed to exec '%s'", *cmdline); + // Ok, enough safety checks: wipe root partition. + dirtree_read("/", del_node); + + if (TT.console) { + int i; + for (i=0; i<3; i++) if (console != i) dup2(console, i); + if (console>2) close(console); + } + execv(*cmdline, cmdline); + perror_msg("Failed to exec '%s'", *cmdline); panic: - if (toys.optflags & FLAG_h) for (;;) wait(NULL); + if (toys.optflags & FLAG_h) for (;;) wait(NULL); } -- cgit v1.2.3