123 lines
2.4 KiB
C
123 lines
2.4 KiB
C
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/*
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* usage.c
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*
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* Various reporting routines.
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* Originally copied from GIT source.
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*
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* Copyright (C) Linus Torvalds, 2005
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*/
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#include "util.h"
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#include "debug.h"
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static void report(const char *prefix, const char *err, va_list params)
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{
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char msg[1024];
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vsnprintf(msg, sizeof(msg), err, params);
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fprintf(stderr, " %s%s\n", prefix, msg);
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}
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static NORETURN void usage_builtin(const char *err)
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{
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fprintf(stderr, "\n Usage: %s\n", err);
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exit(129);
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}
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static NORETURN void die_builtin(const char *err, va_list params)
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{
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report(" Fatal: ", err, params);
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exit(128);
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}
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static void error_builtin(const char *err, va_list params)
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{
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report(" Error: ", err, params);
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}
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static void warn_builtin(const char *warn, va_list params)
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{
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report(" Warning: ", warn, params);
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}
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/* If we are in a dlopen()ed .so write to a global variable would segfault
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* (ugh), so keep things static. */
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static void (*usage_routine)(const char *err) NORETURN = usage_builtin;
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static void (*die_routine)(const char *err, va_list params) NORETURN = die_builtin;
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static void (*error_routine)(const char *err, va_list params) = error_builtin;
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static void (*warn_routine)(const char *err, va_list params) = warn_builtin;
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void set_die_routine(void (*routine)(const char *err, va_list params) NORETURN)
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{
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die_routine = routine;
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}
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void usage(const char *err)
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{
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usage_routine(err);
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}
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void die(const char *err, ...)
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{
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va_list params;
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va_start(params, err);
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die_routine(err, params);
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va_end(params);
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}
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int error(const char *err, ...)
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{
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va_list params;
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va_start(params, err);
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error_routine(err, params);
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va_end(params);
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return -1;
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}
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void warning(const char *warn, ...)
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{
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va_list params;
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va_start(params, warn);
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warn_routine(warn, params);
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va_end(params);
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}
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uid_t parse_target_uid(const char *str, const char *tid, const char *pid)
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{
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struct passwd pwd, *result;
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char buf[1024];
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if (str == NULL)
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return UINT_MAX;
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/* UID and PID are mutually exclusive */
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if (tid || pid) {
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ui__warning("PID/TID switch overriding UID\n");
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sleep(1);
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return UINT_MAX;
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}
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getpwnam_r(str, &pwd, buf, sizeof(buf), &result);
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if (result == NULL) {
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char *endptr;
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int uid = strtol(str, &endptr, 10);
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if (*endptr != '\0') {
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ui__error("Invalid user %s\n", str);
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return UINT_MAX - 1;
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}
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getpwuid_r(uid, &pwd, buf, sizeof(buf), &result);
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if (result == NULL) {
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ui__error("Problems obtaining information for user %s\n",
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str);
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return UINT_MAX - 1;
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}
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}
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return result->pw_uid;
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}
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