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Annotation of researchv10no/cmd/upas/libc/s5mboxowner.c, revision 1.1

1.1     ! root        1: /*
        !             2:  *     store mbox owner through pointer.  return 0 (success), -1 (failure)
        !             3:  *     hard version for systems that let you give files away;
        !             4:  *     the owner of a mbox is determined from its name -- unless
        !             5:  *     the set-uid bit is on (!) .  In that case, the file must have
        !             6:  *     been created by its present owner, else anyone could become root.
        !             7:  *     If the set-uid bit is on, return the file owner and group.
        !             8:  */
        !             9: 
        !            10: #include <pwd.h>
        !            11: #include <types.h>
        !            12: #include <stat.h>
        !            13: #include "string.h"
        !            14: #include "aux.h"
        !            15: #include "ugid.h"
        !            16: #include "mail.h"
        !            17: 
        !            18: mboxowner (mbox, ugidp)
        !            19:        char *mbox;
        !            20:        struct ugid *ugidp;
        !            21: {
        !            22:        char *u;
        !            23:        struct passwd *pw, *getpwnam();
        !            24:        struct stat statb;
        !            25: 
        !            26:        if (stat (mbox, &statb) >= 0 && (statb.st_mode & S_ISUID)) {
        !            27:                ugidp->uid = statb.st_uid;
        !            28:                ugidp->gid = statb.st_gid;
        !            29:                return 0;
        !            30:        }
        !            31: 
        !            32:        u = basename(mbox);
        !            33:        if (u == NULL)
        !            34:                return -1;
        !            35: 
        !            36:        pw = getpwnam(u);
        !            37:        if (pw == NULL)
        !            38:                return -1;
        !            39: 
        !            40:        ugidp->uid = pw->pw_uid;
        !            41:        ugidp->gid = pw->pw_gid;
        !            42:        return 0;
        !            43: }

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