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authorDenys Vlasenko <vda.linux@googlemail.com>2009-07-13 01:15:30 +0200
committerDenys Vlasenko <vda.linux@googlemail.com>2009-07-13 01:15:30 +0200
commit189f74d0f2760d3da1a05cba75653dade4c8a9c3 (patch)
treef192b88fd0a919d8d71d930272f25de1002a3e70 /libbb/update_passwd.c
parent044b18083b4380f158002ed7c00c52d362c9632c (diff)
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passwd + /etc/shadow: chage "change time" field too
function old new delta update_passwd 1171 1270 +99 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Diffstat (limited to 'libbb/update_passwd.c')
-rw-r--r--libbb/update_passwd.c22
1 files changed, 19 insertions, 3 deletions
diff --git a/libbb/update_passwd.c b/libbb/update_passwd.c
index aa1e2ed08..3aab40175 100644
--- a/libbb/update_passwd.c
+++ b/libbb/update_passwd.c
@@ -87,6 +87,12 @@ int FAST_FUNC update_passwd(const char *filename,
87 int i; 87 int i;
88 int changed_lines; 88 int changed_lines;
89 int ret = -1; /* failure */ 89 int ret = -1; /* failure */
90 /* used as a bool: "are we modifying /etc/shadow?" */
91#if ENABLE_FEATURE_SHADOWPASSWDS
92 const char *shadow = strstr(filename, "shadow");
93#else
94# define shadow NULL
95#endif
90 96
91 filename = xmalloc_follow_symlinks(filename); 97 filename = xmalloc_follow_symlinks(filename);
92 if (filename == NULL) 98 if (filename == NULL)
@@ -100,7 +106,7 @@ int FAST_FUNC update_passwd(const char *filename,
100 name = xasprintf("%s:", name); 106 name = xasprintf("%s:", name);
101 user_len = strlen(name); 107 user_len = strlen(name);
102 108
103 if (ENABLE_FEATURE_SHADOWPASSWDS && strstr(filename, "shadow")) 109 if (shadow)
104 old_fp = fopen(filename, "r+"); 110 old_fp = fopen(filename, "r+");
105 else 111 else
106 old_fp = fopen_or_warn(filename, "r+"); 112 old_fp = fopen_or_warn(filename, "r+");
@@ -215,8 +221,18 @@ int FAST_FUNC update_passwd(const char *filename,
215 ) { 221 ) {
216 /* Change passwd */ 222 /* Change passwd */
217 cp = strchrnul(cp, ':'); /* move past old passwd */ 223 cp = strchrnul(cp, ':'); /* move past old passwd */
218 /* name: + new_passwd + :rest of line */ 224
219 fprintf(new_fp, "%s%s%s\n", name, new_passwd, cp); 225 if (shadow && *cp == ':') {
226 /* /etc/shadow's field 3 (passwd change date) needs updating */
227 /* move past old change date */
228 cp = strchrnul(cp + 1, ':');
229 /* "name:" + "new_passwd" + ":" + "change date" + ":rest of line" */
230 fprintf(new_fp, "%s%s:%u%s\n", name, new_passwd,
231 (unsigned)(time(NULL)) / (24*60*60), cp);
232 } else {
233 /* "name:" + "new_passwd" + ":rest of line" */
234 fprintf(new_fp, "%s%s%s\n", name, new_passwd, cp);
235 }
220 changed_lines++; 236 changed_lines++;
221 } /* else delete user or group: skip the line */ 237 } /* else delete user or group: skip the line */
222 next: 238 next: