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avoid using strok - eliminates use of hidden global variable

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function                                             old     new   delta
udhcp_str2optset                                     616     650     +34
setpriv_main                                         950     975     +25
switch_root_main                                     688     706     +18
parse                                                958     970     +12
getopt_main                                          622     628      +6
parse_resolvconf                                     302     306      +4
mpstat_main                                         1139    1142      +3
static.p                                               4       -      -4
cdcmd                                                717     702     -15
strtok                                               148       -    -148
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(add/remove: 0/3 grow/shrink: 7/1 up/down: 102/-167)          Total: -65 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko
2020-10-06 02:36:47 +02:00
parent 535a509846
commit 2496616b0a
11 changed files with 46 additions and 36 deletions
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15
libbb/update_passwd.c
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@@ -18,17 +18,20 @@
#if ENABLE_SELINUX
static void check_selinux_update_passwd(const char *username)
{
security_context_t context;
char *seuser;
security_context_t seuser;
char *p;
if (getuid() != (uid_t)0 || is_selinux_enabled() == 0)
return; /* No need to check */
if (getprevcon_raw(&context) < 0)
if (getprevcon_raw(&seuser) < 0)
bb_simple_perror_msg_and_die("getprevcon failed");
seuser = strtok(context, ":");
if (!seuser)
bb_error_msg_and_die("invalid context '%s'", context);
p = strchr(seuser, ':');
if (!p)
bb_error_msg_and_die("invalid context '%s'", seuser);
*p = '\0';
if (strcmp(seuser, username) != 0) {
security_class_t tclass;
access_vector_t av;