73 lines
1.5 KiB
C
73 lines
1.5 KiB
C
/*++
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/* NAME
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/* stat_as 3
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/* SUMMARY
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/* stat file as user
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/* SYNOPSIS
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/* #include <sys/stat.h>
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/* #include <stat_as.h>
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/*
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/* int stat_as(path, st, euid, egid)
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/* const char *path;
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/* struct stat *st;
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/* uid_t euid;
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/* gid_t egid;
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/* DESCRIPTION
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/* stat_as() looks up the file status of the named \fIpath\fR,
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/* using the effective rights specified by \fIeuid\fR
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/* and \fIegid\fR, and stores the result into the structure pointed
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/* to by \fIst\fR. A -1 result means the lookup failed.
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/* This call follows symbolic links.
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/* DIAGNOSTICS
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/* Fatal error: no permission to change privilege level.
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/* SEE ALSO
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/* set_eugid(3) switch effective rights
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/* LICENSE
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/* .ad
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/* .fi
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/* The Secure Mailer license must be distributed with this software.
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/* AUTHOR(S)
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/* Wietse Venema
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/* IBM T.J. Watson Research
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/* P.O. Box 704
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/* Yorktown Heights, NY 10598, USA
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/*--*/
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/* System library. */
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#include <sys_defs.h>
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#include <sys/stat.h>
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#include <unistd.h>
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/* Utility library. */
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#include "msg.h"
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#include "set_eugid.h"
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#include "stat_as.h"
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/* stat_as - stat file as user */
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int stat_as(const char *path, struct stat * st, uid_t euid, gid_t egid)
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{
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uid_t saved_euid = geteuid();
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gid_t saved_egid = getegid();
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int status;
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/*
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* Switch to the target user privileges.
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*/
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set_eugid(euid, egid);
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/*
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* Stat that file.
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*/
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status = stat(path, st);
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/*
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* Restore saved privileges.
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*/
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set_eugid(saved_euid, saved_egid);
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return (status);
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}
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