+++ /dev/null
-/*
- * Copyright (C) 2004-2010 Andre Noll <maan@systemlinux.org>
- *
- * Licensed under the GPL v2. For licencing details see COPYING.
- */
-#include <string.h>
-#include <stdlib.h>
-#include <stdio.h>
-#include <stdarg.h>
-#include <assert.h>
-#include <limits.h>
-#include <errno.h>
-#include <pwd.h>
-#include <sys/types.h>
-#include <unistd.h>
-
-
-#include "gcc-compat.h"
-#include "log.h"
-#include "error.h"
-#include "string.h"
-
-/**
- * Write a message to a dynamically allocated string.
- *
- * \param fmt Usual format string.
- * \param p Result pointer.
- *
- * \sa printf(3). */
-#define VSPRINTF(fmt, p) \
-{ \
- int n; \
- size_t size = 100; \
- p = dss_malloc(size); \
- while (1) { \
- va_list ap; \
- /* Try to print in the allocated space. */ \
- va_start(ap, fmt); \
- n = vsnprintf(p, size, fmt, ap); \
- va_end(ap); \
- /* If that worked, return the string. */ \
- if (n > -1 && n < size) \
- break; \
- /* Else try again with more space. */ \
- if (n > -1) /* glibc 2.1 */ \
- size = n + 1; /* precisely what is needed */ \
- else /* glibc 2.0 */ \
- size *= 2; /* twice the old size */ \
- p = dss_realloc(p, size); \
- } \
-}
-
-/**
- * dss' version of realloc().
- *
- * \param p Pointer to the memory block, may be \p NULL.
- * \param size The desired new size.
- *
- * A wrapper for realloc(3). It calls \p exit(\p EXIT_FAILURE) on errors,
- * i.e. there is no need to check the return value in the caller.
- *
- * \return A pointer to the newly allocated memory, which is suitably aligned
- * for any kind of variable and may be different from \a p.
- *
- * \sa realloc(3).
- */
-__must_check __malloc void *dss_realloc(void *p, size_t size)
-{
- /*
- * No need to check for NULL pointers: If p is NULL, the call
- * to realloc is equivalent to malloc(size)
- */
- assert(size);
- if (!(p = realloc(p, size))) {
- DSS_EMERG_LOG("realloc failed (size = %zu), aborting\n",
- size);
- exit(EXIT_FAILURE);
- }
- return p;
-}
-
-/**
- * dss' version of malloc().
- *
- * \param size The desired new size.
- *
- * A wrapper for malloc(3) which exits on errors.
- *
- * \return A pointer to the allocated memory, which is suitably aligned for any
- * kind of variable.
- *
- * \sa malloc(3).
- */
-__must_check __malloc void *dss_malloc(size_t size)
-{
- void *p;
- assert(size);
- p = malloc(size);
-
- if (!p) {
- DSS_EMERG_LOG("malloc failed (size = %zu), aborting\n",
- size);
- exit(EXIT_FAILURE);
- }
- return p;
-}
-
-/**
- * dss' version of calloc().
- *
- * \param size The desired new size.
- *
- * A wrapper for calloc(3) which exits on errors.
- *
- * \return A pointer to the allocated and zeroed-out memory, which is suitably
- * aligned for any kind of variable.
- *
- * \sa calloc(3)
- */
-__must_check __malloc void *dss_calloc(size_t size)
-{
- void *ret = dss_malloc(size);
-
- memset(ret, 0, size);
- return ret;
-}
-
-/**
- * dss' version of strdup().
- *
- * \param s The string to be duplicated.
- *
- * A wrapper for strdup(3). It calls \p exit(EXIT_FAILURE) on errors, i.e.
- * there is no need to check the return value in the caller.
- *
- * \return A pointer to the duplicated string. If \p s was the NULL pointer,
- * an pointer to an empty string is returned.
- *
- * \sa strdup(3)
- */
-
-__must_check __malloc char *dss_strdup(const char *s)
-{
- char *ret;
-
- if ((ret = strdup(s? s: "")))
- return ret;
- DSS_EMERG_LOG("strdup failed, aborting\n");
- exit(EXIT_FAILURE);
-}
-
-/**
- * Allocate a sufficiently large string and print into it.
- *
- * \param fmt A usual format string.
- *
- * Produce output according to \p fmt. No artificial bound on the length of the
- * resulting string is imposed.
- *
- * \return This function either returns a pointer to a string that must be
- * freed by the caller or aborts without returning.
- *
- * \sa printf(3).
- */
-__must_check __printf_1_2 __malloc char *make_message(const char *fmt, ...)
-{
- char *msg;
-
- VSPRINTF(fmt, msg);
- return msg;
-}
-
-/**
- * Get the home directory of the current user.
- *
- * \return A dynammically allocated string that must be freed by the caller. If
- * the home directory could not be found, this function returns "/tmp".
- */
-__must_check __malloc char *get_homedir(void)
-{
- struct passwd *pw = getpwuid(getuid());
- return dss_strdup(pw? pw->pw_dir : "/tmp");
-}
-
-/**
- * Convert a string to a 64-bit signed integer value.
- *
- * \param str The string to be converted.
- * \param value Result pointer.
- *
- * \return Standard.
- *
- * \sa strtol(3), atoi(3).
- */
-int dss_atoi64(const char *str, int64_t *value)
-{
- char *endptr;
- long long tmp;
-
- errno = 0; /* To distinguish success/failure after call */
- tmp = strtoll(str, &endptr, 10);
- if (errno == ERANGE && (tmp == LLONG_MAX || tmp == LLONG_MIN))
- return -E_ATOI_OVERFLOW;
- if (errno != 0 && tmp == 0) /* other error */
- return -E_STRTOLL;
- if (endptr == str)
- return -E_ATOI_NO_DIGITS;
- if (*endptr != '\0') /* Further characters after number */
- return -E_ATOI_JUNK_AT_END;
- *value = tmp;
- return 1;
-}
-
-/**
- * Get the logname of the current user.
- *
- * \return A dynammically allocated string that must be freed by the caller. On
- * errors, the string "unknown user" is returned, i.e. this function never
- * returns \p NULL.
- *
- * \sa getpwuid(3).
- */
-__must_check __malloc char *dss_logname(void)
-{
- struct passwd *pw = getpwuid(getuid());
- return dss_strdup(pw? pw->pw_name : "unknown_user");
-}
-
-/**
- * Split string and return pointers to its parts.
- *
- * \param args The string to be split.
- * \param argv_ptr Pointer to the list of substrings.
- * \param delim Delimiter.
- *
- * This function modifies \a args by replacing each occurance of \a delim by
- * zero. A \p NULL-terminated array of pointers to char* is allocated dynamically
- * and these pointers are initialized to point to the broken-up substrings
- * within \a args. A pointer to this array is returned via \a argv_ptr.
- *
- * \return The number of substrings found in \a args.
- */
-unsigned split_args(char *args, char *** const argv_ptr, const char *delim)
-{
- char *p = args;
- char **argv;
- size_t n = 0, i, j;
-
- p = args + strspn(args, delim);
- for (;;) {
- i = strcspn(p, delim);
- if (!i)
- break;
- p += i;
- n++;
- p += strspn(p, delim);
- }
- *argv_ptr = dss_malloc((n + 1) * sizeof(char *));
- argv = *argv_ptr;
- i = 0;
- p = args + strspn(args, delim);
- while (p) {
- argv[i] = p;
- j = strcspn(p, delim);
- if (!j)
- break;
- p += strcspn(p, delim);
- if (*p) {
- *p = '\0';
- p++;
- p += strspn(p, delim);
- }
- i++;
- }
- argv[n] = NULL;
- return n;
-}
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