From 0b44a0315b47dd8eced9f3b7f31580cf14bbfc01 Mon Sep 17 00:00:00 2001 From: Rich Felker Date: Sat, 12 Feb 2011 00:22:29 -0500 Subject: initial check-in, version 0.5.0 --- src/passwd/getpw_r.c | 46 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 46 insertions(+) create mode 100644 src/passwd/getpw_r.c (limited to 'src/passwd/getpw_r.c') diff --git a/src/passwd/getpw_r.c b/src/passwd/getpw_r.c new file mode 100644 index 00000000..7b331e8a --- /dev/null +++ b/src/passwd/getpw_r.c @@ -0,0 +1,46 @@ +#include "pwf.h" + +#define FIX(x) (pw->pw_##x = pw->pw_##x-line+buf) + +static int getpw_r(const char *name, uid_t uid, struct passwd *pw, char *buf, size_t size, struct passwd **res) +{ + FILE *f; + char *line = 0; + size_t len = 0; + int rv = 0; + + f = fopen("/etc/passwd", "rb"); + if (!f) return errno; + + *res = 0; + while (__getpwent_a(f, pw, &line, &len)) { + if (name && !strcmp(name, pw->pw_name) + || !name && pw->pw_uid == uid) { + if (size < len) { + rv = ERANGE; + break; + } + *res = pw; + memcpy(buf, line, len); + FIX(name); + FIX(passwd); + FIX(gecos); + FIX(dir); + FIX(shell); + break; + } + } + free(line); + fclose(f); + return rv; +} + +int getpwnam_r(const char *name, struct passwd *pw, char *buf, size_t size, struct passwd **res) +{ + return getpw_r(name, 0, pw, buf, size, res); +} + +int getpwuid_r(uid_t uid, struct passwd *pw, char *buf, size_t size, struct passwd **res) +{ + return getpw_r(0, uid, pw, buf, size, res); +} -- cgit v1.2.1