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setclassenvironment: trim leading spaces in variable names

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Trim leading spaces in variable names when the list is e.g.
pretty-formatted in /etc/login.conf or ~/.login_conf.

PR:		247947
Reviewed by:	allanjude
Differential Revision:	https://reviews.freebsd.org/D25649

(cherry picked from commit eeaf9d562f)
This commit is contained in:
Yuri Pankov 2021-04-12 01:02:12 +03:00
parent bda3bf09d8
commit c6dcae2dfa
1 changed files with 7 additions and 2 deletions
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9
lib/libutil/login_class.c
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@ -231,12 +231,17 @@ setclassenvironment(login_cap_t *lc, const struct passwd * pwd, int paths)
while (*set_env != NULL) {
char *p = strchr(*set_env, '=');
if (p != NULL) { /* Discard invalid entries */
if (p != NULL && p != *set_env) { /* Discard invalid entries */
const char *ep;
char *np;
*p++ = '\0';
/* Strip leading spaces from variable name */
ep = *set_env;
while (*ep == ' ' || *ep == '\t')
ep++;
if ((np = substvar(p, pwd, hlen, pch, nlen)) != NULL) {
setenv(*set_env, np, 1);
setenv(ep, np, 1);
free(np);
}
}