Messages in this thread Patch in this message | | | Subject | [patch 4/5] fs/devpts: use lib/parser | From | domen@coderock ... | Date | Mon, 10 Jan 2005 19:45:33 +0100 |
| |
Hi.
Use lib/parser.c for parsing mount options (item from "2.6 should fix"). 1 files changed, 49 insertions(+), 27 deletions(-)
Compile & boot tested.
Signed-off-by: Domen Puncer <domen@coderock.org> ---
kj-domen/fs/devpts/inode.c | 76 +++++++++++++++++++++++++++++---------------- 1 files changed, 49 insertions(+), 27 deletions(-)
diff -puN fs/devpts/inode.c~lib-parser-fs_devpts_inode fs/devpts/inode.c --- kj/fs/devpts/inode.c~lib-parser-fs_devpts_inode 2005-01-10 18:00:22.000000000 +0100 +++ kj-domen/fs/devpts/inode.c 2005-01-10 18:00:22.000000000 +0100 @@ -19,6 +19,7 @@ #include <linux/tty.h> #include <linux/devpts_fs.h> #include <linux/xattr.h> +#include <linux/parser.h> #define DEVPTS_SUPER_MAGIC 0x1cd1 @@ -51,39 +52,60 @@ static struct { umode_t mode; } config = {.mode = 0600}; +enum { + Opt_uid, Opt_gid, Opt_mode, + Opt_err +}; + +static match_table_t tokens = { + {Opt_uid, "uid=%u"}, + {Opt_gid, "gid=%u"}, + {Opt_mode, "mode=%o"}, + {Opt_err, NULL} +}; + static int devpts_remount(struct super_block *sb, int *flags, char *data) { - int setuid = 0; - int setgid = 0; - uid_t uid = 0; - gid_t gid = 0; - umode_t mode = 0600; - char *this_char; - - this_char = NULL; - while ((this_char = strsep(&data, ",")) != NULL) { - int n; - char dummy; - if (!*this_char) + char *p; + + config.setuid = 0; + config.setgid = 0; + config.uid = 0; + config.gid = 0; + config.mode = 0600; + + while ((p = strsep(&data, ",")) != NULL) { + substring_t args[MAX_OPT_ARGS]; + int token; + int option; + + if (!*p) continue; - if (sscanf(this_char, "uid=%i%c", &n, &dummy) == 1) { - setuid = 1; - uid = n; - } else if (sscanf(this_char, "gid=%i%c", &n, &dummy) == 1) { - setgid = 1; - gid = n; - } else if (sscanf(this_char, "mode=%o%c", &n, &dummy) == 1) - mode = n & ~S_IFMT; - else { - printk("devpts: called with bogus options\n"); + + token = match_token(p, tokens, args); + switch (token) { + case Opt_uid: + if (match_int(&args[0], &option)) + return -EINVAL; + config.uid = option; + config.setuid = 1; + break; + case Opt_gid: + if (match_int(&args[0], &option)) + return -EINVAL; + config.gid = option; + config.setgid = 1; + break; + case Opt_mode: + if (match_octal(&args[0], &option)) + return -EINVAL; + config.mode = option & ~S_IFMT; + break; + default: + printk(KERN_ERR "devpts: called with bogus options\n"); return -EINVAL; } } - config.setuid = setuid; - config.setgid = setgid; - config.uid = uid; - config.gid = gid; - config.mode = mode; return 0; } _ - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |