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Procan: print saved set-user-ID

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This commit is contained in:
Gerhard Rieger 2023-11-26 14:08:33 +01:00 • committed by Gerhard
parent 08d01c19ff
commit 568c26861b
4 changed files with 31 additions and 0 deletions

3
CHANGES
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@ -98,6 +98,9 @@ Features:
POSIXMQ is now an alias for POSIXMQ-BIDIRECTIONAL. It can also be used
in unidirectional context.
Procan uses getresuid() and getresgid() when available, to determine
the saved set-user-ID.
Building:
Disabling certain features during configure could break build process.

6
config.h.in
View file

@ -162,6 +162,12 @@
/* Define if you have the clock_gettime function */
#undef HAVE_CLOCK_GETTIME
/* Define if you have the getresuid function */
#undef HAVE_GETRESUID
/* Define if you have the getresgid function */
#undef HAVE_GETRESGID
/* Define if you have the strtoll function */
#undef HAVE_STRTOLL

2
configure.ac
View file

@ -1722,6 +1722,8 @@ AC_CHECK_PROTOTYPE_LIB(gettimeofday)
AC_CHECK_FUNC(clock_gettime, AC_DEFINE(HAVE_CLOCK_GETTIME), AC_CHECK_LIB(rt, clock_gettime, [LIBS="-lrt $LIBS"; AC_DEFINE(HAVE_CLOCK_GETTIME)]))
AC_CHECK_FUNCS(getresuid getresgid)
dnl Search for flock()
# with Linux it's in libc, with AIX in libbsd
AC_CHECK_FUNC(flock, AC_DEFINE(HAVE_FLOCK),

20
procan.c
View file

@ -187,10 +187,30 @@ int procan(FILE *outfile) {
fprintf(outfile, "process group id if fg process / stderr = "F_pid"\n", Tcgetpgrp(2));
/* process owner, groups */
#if HAVE_GETRESUID
{
uid_t ruid, euid, suid;
getresuid(&ruid, &euid, &suid);
fprintf(outfile, "user id = "F_uid"\n", ruid);
fprintf(outfile, "effective user id = "F_uid"\n", euid);
fprintf(outfile, "saved set-user id = "F_uid"\n", suid);
}
#else /* !HAVE_GETRESUID */
fprintf(outfile, "user id = "F_uid"\n", Getuid());
fprintf(outfile, "effective user id = "F_uid"\n", Geteuid());
#endif /* !HAVE_GETRESUID */
#if HAVE_GETRESGID
{
gid_t rgid, egid, sgid;
getresgid(&rgid, &egid, &sgid);
fprintf(outfile, "group id = "F_gid"\n", rgid);
fprintf(outfile, "effective group id = "F_gid"\n", egid);
fprintf(outfile, "saved set-group id = "F_gid"\n", sgid);
}
#else /* !HAVE_GETRESGID */
fprintf(outfile, "group id = "F_gid"\n", Getgid());
fprintf(outfile, "effective group id = "F_gid"\n", Getegid());
#endif /* !HAVE_GETRESGID */
/* Simple process features */
fprintf(outfile, "\n");