90 lines
2.2 KiB
C
90 lines
2.2 KiB
C
/*-------------------------------------------------------------------------
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*
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* user.c
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*
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* Wrapper functions for user and home directory lookup.
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*
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* Portions Copyright (c) 1996-2024, PostgreSQL Global Development Group
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*
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* src/port/user.c
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*
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*-------------------------------------------------------------------------
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*/
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#include "c.h"
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#include <pwd.h>
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#ifndef WIN32
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/*
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* pg_get_user_name - get the name of the user with the given ID
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*
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* On success, the user name is returned into the buffer (of size buflen),
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* and "true" is returned. On failure, a localized error message is
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* returned into the buffer, and "false" is returned.
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*/
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bool
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pg_get_user_name(uid_t user_id, char *buffer, size_t buflen)
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{
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char pwdbuf[BUFSIZ];
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struct passwd pwdstr;
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struct passwd *pw = NULL;
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int pwerr;
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pwerr = getpwuid_r(user_id, &pwdstr, pwdbuf, sizeof(pwdbuf), &pw);
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if (pw != NULL)
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{
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strlcpy(buffer, pw->pw_name, buflen);
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return true;
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}
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if (pwerr != 0)
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snprintf(buffer, buflen,
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_("could not look up local user ID %d: %s"),
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(int) user_id,
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strerror_r(pwerr, pwdbuf, sizeof(pwdbuf)));
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else
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snprintf(buffer, buflen,
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_("local user with ID %d does not exist"),
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(int) user_id);
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return false;
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}
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/*
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* pg_get_user_home_dir - get the home directory of the user with the given ID
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*
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* On success, the directory path is returned into the buffer (of size buflen),
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* and "true" is returned. On failure, a localized error message is
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* returned into the buffer, and "false" is returned.
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*
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* Note that this does not incorporate the common behavior of checking
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* $HOME first, since it's independent of which user_id is queried.
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*/
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bool
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pg_get_user_home_dir(uid_t user_id, char *buffer, size_t buflen)
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{
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char pwdbuf[BUFSIZ];
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struct passwd pwdstr;
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struct passwd *pw = NULL;
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int pwerr;
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pwerr = getpwuid_r(user_id, &pwdstr, pwdbuf, sizeof(pwdbuf), &pw);
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if (pw != NULL)
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{
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strlcpy(buffer, pw->pw_dir, buflen);
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return true;
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}
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if (pwerr != 0)
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snprintf(buffer, buflen,
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_("could not look up local user ID %d: %s"),
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(int) user_id,
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strerror_r(pwerr, pwdbuf, sizeof(pwdbuf)));
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else
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snprintf(buffer, buflen,
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_("local user with ID %d does not exist"),
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(int) user_id);
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return false;
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}
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#endif /* !WIN32 */
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