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| author | Karel Zak | 2010-09-21 21:44:19 +0200 |
|---|---|---|
| committer | Karel Zak | 2011-01-03 12:28:42 +0100 |
| commit | a1e8af753cfe312d22c1b497243ef1f98d97052c (patch) | |
| tree | 150d1ec15d2c6bb404ab5c3517d09e0466d0fe57 /shlibs/mount/src/utils.c | |
| parent | libmount: add first part of high-level API (diff) | |
| download | kernel-qcow2-util-linux-a1e8af753cfe312d22c1b497243ef1f98d97052c.tar.gz kernel-qcow2-util-linux-a1e8af753cfe312d22c1b497243ef1f98d97052c.tar.xz kernel-qcow2-util-linux-a1e8af753cfe312d22c1b497243ef1f98d97052c.zip | |
libmount: add utils for work with uid/gid
Signed-off-by: Karel Zak <kzak@redhat.com>
Diffstat (limited to 'shlibs/mount/src/utils.c')
| -rw-r--r-- | shlibs/mount/src/utils.c | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/shlibs/mount/src/utils.c b/shlibs/mount/src/utils.c index f48e533d7..108bb2eb6 100644 --- a/shlibs/mount/src/utils.c +++ b/shlibs/mount/src/utils.c @@ -27,6 +27,7 @@ #include <sys/types.h> #include <fcntl.h> #include <pwd.h> +#include <grp.h> #include "strutils.h" #include "pathnames.h" @@ -316,6 +317,48 @@ char *mnt_get_username(const uid_t uid) return username; } +int mnt_get_uid(const char *username, uid_t *uid) +{ + struct passwd pwd; + struct passwd *pw; + size_t sz = sysconf(_SC_GETPW_R_SIZE_MAX); + char *buf; + + if (sz <= 0) + sz = 16384; /* Should be more than enough */ + + buf = malloc(sz); + if (!buf) + return -ENOMEM; + + if (!getpwnam_r(username, &pwd, buf, sz, &pw) && pw) + *uid= pw->pw_uid; + + free(buf); + return 0; +} + +int mnt_get_gid(const char *groupname, gid_t *gid) +{ + struct group grp; + struct group *gr; + size_t sz = sysconf(_SC_GETGR_R_SIZE_MAX); + char *buf; + + if (sz <= 0) + sz = 16384; /* Should be more than enough */ + + buf = malloc(sz); + if (!buf) + return -ENOMEM; + + if (!getgrnam_r(groupname, &grp, buf, sz, &gr) && gr) + *gid= gr->gr_gid; + + free(buf); + return 0; +} + /* * Returns 1 if /etc/mtab is a reqular file. */ |