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Code Issues Releases Activity

indent(1): Rearrange option parsing code to squelch clang's static analyzer.

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clang-analyzer complained that eqin() sets file-scoped pointer param_start
to point into char buffer defined in scan_profile(), and once
scan_profile() exits, param_start is a "dangling reference". param_start
was never used afterwards, but it's cleaner to move it to set_option()
which is the only branch where param_start is needed.

Reference:
ab0e44e5da

Differential Revision: https://reviews.freebsd.org/D6966  (Partial)
Submitted by:	Piotr Stefaniak
This commit is contained in:
Pedro F. Giffuni 2016-07-31 21:43:43 +00:00
parent efc12d78f7
commit e725fe4b06
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=303601
1 changed files with 6 additions and 8 deletions
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14
usr.bin/indent/args.c
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@ -223,17 +223,14 @@ scan_profile(FILE *f)
}
}
const char *param_start;
static int
static const char *
eqin(const char *s1, const char *s2)
{
while (*s1) {
if (*s1++ != *s2++)
return (false);
return (NULL);
}
param_start = s2;
return (true);
return (s2);
}
/*
@ -257,11 +254,12 @@ set_defaults(void)
void
set_option(char *arg)
{
struct pro *p;
struct pro *p;
const char *param_start;
arg++; /* ignore leading "-" */
for (p = pro; p->p_name; p++)
if (*p->p_name == *arg && eqin(p->p_name, arg))
if (*p->p_name == *arg && (param_start = eqin(p->p_name, arg)) != NULL)
goto found;
errx(1, "%s: unknown parameter \"%s\"", option_source, arg - 1);
found: