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objtool: Improve error message for bad file argument

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If a nonexistent file is supplied to objtool, it complains with a
non-helpful error:

  open: No such file or directory

Improve it to:

  objtool: Can't open 'foo': No such file or directory

Reported-by: Markus <M4rkusXXL@web.de>
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/406a3d00a21225eee2819844048e17f68523ccf6.1516025651.git.jpoimboe@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Josh Poimboeuf 2018-01-15 08:17:08 -06:00 • committed by Ingo Molnar
parent 2a0098d706
commit 385d11b152
1 changed files with 3 additions and 1 deletions
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4
tools/objtool/elf.c
View file

@ -26,6 +26,7 @@
#include <stdlib.h> #include <stdlib.h>
#include <string.h> #include <string.h>
#include <unistd.h> #include <unistd.h>
#include <errno.h>
#include "elf.h" #include "elf.h"
#include "warn.h" #include "warn.h"
@ -358,7 +359,8 @@ struct elf *elf_open(const char *name, int flags)
elf->fd = open(name, flags); elf->fd = open(name, flags);
if (elf->fd == -1) { if (elf->fd == -1) {
perror("open"); fprintf(stderr, "objtool: Can't open '%s': %s\n",
name, strerror(errno));
goto err; goto err;
} }