version 1.20, 2002/04/01 21:50:51 |
version 1.20.2.2, 2002/10/11 14:51:53 |
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{ |
{ |
/* Save the current euid, and egroups. */ |
/* Save the current euid, and egroups. */ |
saved_euid = geteuid(); |
saved_euid = geteuid(); |
debug("temporarily_use_uid: %d/%d (e=%d)", |
saved_egid = getegid(); |
pw->pw_uid, pw->pw_gid, saved_euid); |
debug("temporarily_use_uid: %u/%u (e=%u/%u)", |
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(u_int)pw->pw_uid, (u_int)pw->pw_gid, |
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(u_int)saved_euid, (u_int)saved_egid); |
if (saved_euid != 0) { |
if (saved_euid != 0) { |
privileged = 0; |
privileged = 0; |
return; |
return; |
} |
} |
privileged = 1; |
privileged = 1; |
temporarily_use_uid_effective = 1; |
temporarily_use_uid_effective = 1; |
saved_egid = getegid(); |
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saved_egroupslen = getgroups(NGROUPS_MAX, saved_egroups); |
saved_egroupslen = getgroups(NGROUPS_MAX, saved_egroups); |
if (saved_egroupslen < 0) |
if (saved_egroupslen < 0) |
fatal("getgroups: %.100s", strerror(errno)); |
fatal("getgroups: %.100s", strerror(errno)); |
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if (setgroups(user_groupslen, user_groups) < 0) |
if (setgroups(user_groupslen, user_groups) < 0) |
fatal("setgroups: %.100s", strerror(errno)); |
fatal("setgroups: %.100s", strerror(errno)); |
if (setegid(pw->pw_gid) < 0) |
if (setegid(pw->pw_gid) < 0) |
fatal("setegid %u: %.100s", (u_int) pw->pw_gid, |
fatal("setegid %u: %.100s", (u_int)pw->pw_gid, |
strerror(errno)); |
strerror(errno)); |
if (seteuid(pw->pw_uid) == -1) |
if (seteuid(pw->pw_uid) == -1) |
fatal("seteuid %u: %.100s", (u_int) pw->pw_uid, |
fatal("seteuid %u: %.100s", (u_int)pw->pw_uid, |
strerror(errno)); |
strerror(errno)); |
} |
} |
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void |
void |
restore_uid(void) |
restore_uid(void) |
{ |
{ |
debug("restore_uid"); |
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/* it's a no-op unless privileged */ |
/* it's a no-op unless privileged */ |
if (!privileged) |
if (!privileged) { |
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debug("restore_uid: (unprivileged)"); |
return; |
return; |
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} |
if (!temporarily_use_uid_effective) |
if (!temporarily_use_uid_effective) |
fatal("restore_uid: temporarily_use_uid not effective"); |
fatal("restore_uid: temporarily_use_uid not effective"); |
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debug("restore_uid: %u/%u", (u_int)saved_euid, (u_int)saved_egid); |
/* Set the effective uid back to the saved privileged uid. */ |
/* Set the effective uid back to the saved privileged uid. */ |
if (seteuid(saved_euid) < 0) |
if (seteuid(saved_euid) < 0) |
fatal("seteuid %u: %.100s", (u_int) saved_euid, strerror(errno)); |
fatal("seteuid %u: %.100s", (u_int)saved_euid, strerror(errno)); |
if (setgroups(saved_egroupslen, saved_egroups) < 0) |
if (setgroups(saved_egroupslen, saved_egroups) < 0) |
fatal("setgroups: %.100s", strerror(errno)); |
fatal("setgroups: %.100s", strerror(errno)); |
if (setegid(saved_egid) < 0) |
if (setegid(saved_egid) < 0) |
fatal("setegid %u: %.100s", (u_int) saved_egid, strerror(errno)); |
fatal("setegid %u: %.100s", (u_int)saved_egid, strerror(errno)); |
temporarily_use_uid_effective = 0; |
temporarily_use_uid_effective = 0; |
} |
} |
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permanently_set_uid(struct passwd *pw) |
permanently_set_uid(struct passwd *pw) |
{ |
{ |
if (temporarily_use_uid_effective) |
if (temporarily_use_uid_effective) |
fatal("restore_uid: temporarily_use_uid effective"); |
fatal("permanently_set_uid: temporarily_use_uid effective"); |
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debug("permanently_set_uid: %u/%u", (u_int)pw->pw_uid, |
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(u_int)pw->pw_gid); |
if (setgid(pw->pw_gid) < 0) |
if (setgid(pw->pw_gid) < 0) |
fatal("setgid %u: %.100s", (u_int) pw->pw_gid, strerror(errno)); |
fatal("setgid %u: %.100s", (u_int)pw->pw_gid, strerror(errno)); |
if (setuid(pw->pw_uid) < 0) |
if (setuid(pw->pw_uid) < 0) |
fatal("setuid %u: %.100s", (u_int) pw->pw_uid, strerror(errno)); |
fatal("setuid %u: %.100s", (u_int)pw->pw_uid, strerror(errno)); |
} |
} |