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| author | Rasmus Villemoes <linux@rasmusvillemoes.dk> | 2015-04-16 12:44:56 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-04-17 09:03:59 -0400 |
| commit | 6ceafb880c218a14e0cf8d08499138a1a9775fb2 (patch) | |
| tree | 19131ae8840571d482040ba266c95b3862628a4a /fs/binfmt_misc.c | |
| parent | e0df7e1faebad9a7ac0931d03f86fcd5c0d1896e (diff) | |
| download | linux-0-day-6ceafb880c218a14e0cf8d08499138a1a9775fb2.tar.gz linux-0-day-6ceafb880c218a14e0cf8d08499138a1a9775fb2.tar.xz | |
fs/binfmt_misc.c: simplify entry_status()
sprintf() reliably returns the number of characters printed, so we don't
need to ask strlen() where we are. Also replace calling sprintf("%02x")
in a loop with the much simpler bin2hex().
[akpm@linux-foundation.org: it's odd to include kernel.h after everything else]
Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/binfmt_misc.c')
| -rw-r--r-- | fs/binfmt_misc.c | 30 |
1 files changed, 9 insertions, 21 deletions
diff --git a/fs/binfmt_misc.c b/fs/binfmt_misc.c index 97aff2879cda3..9dcb05409ba7e 100644 --- a/fs/binfmt_misc.c +++ b/fs/binfmt_misc.c @@ -9,6 +9,7 @@ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt +#include <linux/kernel.h> #include <linux/module.h> #include <linux/init.h> #include <linux/sched.h> @@ -521,9 +522,8 @@ static int parse_command(const char __user *buffer, size_t count) static void entry_status(Node *e, char *page) { - char *dp; - char *status = "disabled"; - const char *flags = "flags: "; + char *dp = page; + const char *status = "disabled"; if (test_bit(Enabled, &e->flags)) status = "enabled"; @@ -533,12 +533,10 @@ static void entry_status(Node *e, char *page) return; } - sprintf(page, "%s\ninterpreter %s\n", status, e->interpreter); - dp = page + strlen(page); + dp += sprintf(dp, "%s\ninterpreter %s\n", status, e->interpreter); /* print the special flags */ - sprintf(dp, "%s", flags); - dp += strlen(flags); + dp += sprintf(dp, "flags: "); if (e->flags & MISC_FMT_PRESERVE_ARGV0) *dp++ = 'P'; if (e->flags & MISC_FMT_OPEN_BINARY) @@ -550,21 +548,11 @@ static void entry_status(Node *e, char *page) if (!test_bit(Magic, &e->flags)) { sprintf(dp, "extension .%s\n", e->magic); } else { - int i; - - sprintf(dp, "offset %i\nmagic ", e->offset); - dp = page + strlen(page); - for (i = 0; i < e->size; i++) { - sprintf(dp, "%02x", 0xff & (int) (e->magic[i])); - dp += 2; - } + dp += sprintf(dp, "offset %i\nmagic ", e->offset); + dp = bin2hex(dp, e->magic, e->size); if (e->mask) { - sprintf(dp, "\nmask "); - dp += 6; - for (i = 0; i < e->size; i++) { - sprintf(dp, "%02x", 0xff & (int) (e->mask[i])); - dp += 2; - } + dp += sprintf(dp, "\nmask "); + dp = bin2hex(dp, e->mask, e->size); } *dp++ = '\n'; *dp = '\0'; |