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clean up

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Max Lv
2014-04-16 10:44:15 +08:00
parent 08da066a64
commit fa2acecd62
11 changed files with 1082 additions and 953 deletions
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src/utils.c
+58 -58
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@@ -68,83 +68,83 @@ char *itoa(int i)
int run_as(const char *user)
{
#ifndef __MINGW32__
if (user[0])
if (user[0])
{
#ifdef HAVE_GETPWNAM_R
struct passwd pwdbuf, *pwd;
size_t buflen;
int err;
struct passwd pwdbuf, *pwd;
size_t buflen;
int err;
for (buflen = 128;; buflen *= 2)
for (buflen = 128;; buflen *= 2)
{
char buf[buflen]; /* variable length array */
char buf[buflen]; /* variable length array */
/* Note that we use getpwnam_r() instead of getpwnam(),
which returns its result in a statically allocated buffer and
cannot be considered thread safe. */
err = getpwnam_r(user, &pwdbuf, buf, buflen, &pwd);
if(err == 0 && pwd)
/* Note that we use getpwnam_r() instead of getpwnam(),
which returns its result in a statically allocated buffer and
cannot be considered thread safe. */
err = getpwnam_r(user, &pwdbuf, buf, buflen, &pwd);
if(err == 0 && pwd)
{
/* setgid first, because we may not be allowed to do it anymore after setuid */
if (setgid(pwd->pw_gid) != 0)
/* setgid first, because we may not be allowed to do it anymore after setuid */
if (setgid(pwd->pw_gid) != 0)
{
LOGE("Could not change group id to that of run_as user '%s': %s",
user,strerror(errno));
return 0;
}
LOGE("Could not change group id to that of run_as user '%s': %s",
user,strerror(errno));
return 0;
}
if (setuid(pwd->pw_uid) != 0)
if (setuid(pwd->pw_uid) != 0)
{
LOGE("Could not change user id to that of run_as user '%s': %s",
user,strerror(errno));
return 0;
}
break;
}
else if (err != ERANGE)
LOGE("Could not change user id to that of run_as user '%s': %s",
user,strerror(errno));
return 0;
}
break;
}
else if (err != ERANGE)
{
if(err)
LOGE("run_as user '%s' could not be found: %s",user,strerror(err));
else
LOGE("run_as user '%s' could not be found.",user);
return 0;
}
else if (buflen >= 16*1024)
if(err)
LOGE("run_as user '%s' could not be found: %s",user,strerror(err));
else
LOGE("run_as user '%s' could not be found.",user);
return 0;
}
else if (buflen >= 16*1024)
{
/* If getpwnam_r() seems defective, call it quits rather than
keep on allocating ever larger buffers until we crash. */
LOGE("getpwnam_r() requires more than %u bytes of buffer space.",(unsigned)buflen);
return 0;
}
/* Else try again with larger buffer. */
}
/* If getpwnam_r() seems defective, call it quits rather than
keep on allocating ever larger buffers until we crash. */
LOGE("getpwnam_r() requires more than %u bytes of buffer space.",(unsigned)buflen);
return 0;
}
/* Else try again with larger buffer. */
}
#else
/* No getpwnam_r() :-( We'll use getpwnam() and hope for the best. */
struct passwd *pwd;
/* No getpwnam_r() :-( We'll use getpwnam() and hope for the best. */
struct passwd *pwd;
if (!(pwd=getpwnam(user)))
if (!(pwd=getpwnam(user)))
{
LOGE("run_as user %s could not be found.",user);
return 0;
}
/* setgid first, because we may not allowed to do it anymore after setuid */
if (setgid(pwd->pw_gid) != 0)
LOGE("run_as user %s could not be found.",user);
return 0;
}
/* setgid first, because we may not allowed to do it anymore after setuid */
if (setgid(pwd->pw_gid) != 0)
{
LOGE("Could not change group id to that of run_as user '%s': %s",
user,strerror(errno));
return 0;
}
if (setuid(pwd->pw_uid) != 0)
LOGE("Could not change group id to that of run_as user '%s': %s",
user,strerror(errno));
return 0;
}
if (setuid(pwd->pw_uid) != 0)
{
LOGE("Could not change user id to that of run_as user '%s': %s",
user,strerror(errno));
return 0;
}
LOGE("Could not change user id to that of run_as user '%s': %s",
user,strerror(errno));
return 0;
}
#endif
}
}
#endif //__MINGW32__
return 1;
return 1;
}