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shared: add readlink_value

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Reads the basename of the target of a symlink.
This commit is contained in:
Tom Gundersen 2014-11-07 19:19:02 +01:00
parent f06863bde5
commit 9a67bcf275
2 changed files with 23 additions and 0 deletions
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22
src/shared/util.c
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@ -893,6 +893,28 @@ int readlink_malloc(const char *p, char **ret) {
return readlinkat_malloc(AT_FDCWD, p, ret);
}
int readlink_value(const char *p, char **ret) {
_cleanup_free_ char *link = NULL;
char *value;
int r;
r = readlink_malloc(p, &link);
if (r < 0)
return r;
value = basename(link);
if (!value)
return -ENOENT;
value = strdup(value);
if (!value)
return -ENOMEM;
*ret = value;
return 0;
}
int readlink_and_make_absolute(const char *p, char **r) {
_cleanup_free_ char *target = NULL;
char *k;

1
src/shared/util.h
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@ -270,6 +270,7 @@ char **replace_env_argv(char **argv, char **env);
int readlinkat_malloc(int fd, const char *p, char **ret);
int readlink_malloc(const char *p, char **r);
int readlink_value(const char *p, char **ret);
int readlink_and_make_absolute(const char *p, char **r);
int readlink_and_canonicalize(const char *p, char **r);