-dss_objects := cmdline.o dss.o string.o fd.o exec.o signal.o daemon.o df.o time.o snap.o ipc.o
+dss_objects := cmdline.o dss.o str.o file.o exec.o sig.o daemon.o df.o tv.o snap.o ipc.o
all: dss
man: dss.1
#include <stdio.h>
#include "gcc-compat.h"
-#include "error.h"
+#include "err.h"
#include "log.h"
-#include "string.h"
+#include "str.h"
/**
* Do the usual stuff to become a daemon.
#include "gcc-compat.h"
#include "log.h"
-#include "error.h"
-#include "string.h"
+#include "err.h"
+#include "str.h"
#include "df.h"
int get_disk_space(const char *path, struct disk_space *result)
#include "gcc-compat.h"
#include "cmdline.h"
#include "log.h"
-#include "string.h"
-#include "error.h"
-#include "fd.h"
+#include "str.h"
+#include "err.h"
+#include "file.h"
#include "exec.h"
#include "daemon.h"
-#include "signal.h"
+#include "sig.h"
#include "df.h"
-#include "time.h"
+#include "tv.h"
#include "snap.h"
#include "ipc.h"
--- /dev/null
+/*
+ * Copyright (C) 2006-2010 Andre Noll <maan@systemlinux.org>
+ *
+ * Licensed under the GPL v2. For licencing details see COPYING.
+ */
+extern char *dss_errlist[];
+extern char *dss_error_txt;
+
+__printf_2_3 void dss_log(int ll, const char* fmt,...);
+
+/**
+ * This bit indicates whether a number is considered a system error number
+ * If yes, the system errno is just the result of clearing this bit from
+ * the given number.
+ */
+#define SYSTEM_ERROR_BIT 30
+
+/** Check whether the system error bit is set. */
+#define IS_SYSTEM_ERROR(num) (!!((num) & (1 << SYSTEM_ERROR_BIT)))
+
+/** Set the system error bit for the given number. */
+#define ERRNO_TO_DSS_ERROR(num) ((num) | (1 << SYSTEM_ERROR_BIT))
+
+/**
+ * dss' version of strerror(3).
+ *
+ * \param num The error number.
+ *
+ * \return The error text of \a num.
+ */
+static inline char *dss_strerror(int num)
+{
+ assert(num > 0);
+ if (IS_SYSTEM_ERROR(num))
+ return strerror((num) & ((1 << SYSTEM_ERROR_BIT) - 1));
+ else
+ return dss_errlist[num];
+}
+
+#define DSS_ERRORS \
+ DSS_ERROR(SUCCESS, "success"), \
+ DSS_ERROR(SYNTAX, "syntax error"), \
+ DSS_ERROR(ATOI_OVERFLOW, "value too large"), \
+ DSS_ERROR(STRTOLL, "unknown strtoll error"), \
+ DSS_ERROR(ATOI_NO_DIGITS, "no digits found in string"), \
+ DSS_ERROR(ATOI_JUNK_AT_END, "further characters after number"), \
+ DSS_ERROR(INVALID_NUMBER, "invalid number"), \
+ DSS_ERROR(STRFTIME, "strftime() failed"), \
+ DSS_ERROR(LOCALTIME, "localtime() failed"), \
+ DSS_ERROR(NULL_OPEN, "can not open /dev/null"), \
+ DSS_ERROR(DUP_PIPE, "exec error: can not create pipe"), \
+ DSS_ERROR(INVOLUNTARY_EXIT, "unexpected termination cause"), \
+ DSS_ERROR(BAD_EXIT_CODE, "unexpected exit code"), \
+ DSS_ERROR(SIGNAL_SIG_ERR, "signal() returned SIG_ERR"), \
+ DSS_ERROR(SIGNAL, "caught terminating signal"), \
+ DSS_ERROR(BUG, "values of beta might cause dom!"), \
+ DSS_ERROR(NOT_RUNNING, "dss not running")
+
+/**
+ * This is temporarily defined to expand to its first argument (prefixed by
+ * 'E_') and gets later redefined to expand to the error text only
+ */
+#define DSS_ERROR(err, msg) E_ ## err
+
+enum dss_error_codes {
+ DSS_ERRORS
+};
+#undef DSS_ERROR
+#define DSS_ERROR(err, msg) msg
+#define DEFINE_DSS_ERRLIST char *dss_errlist[] = {DSS_ERRORS}
+++ /dev/null
-/*
- * Copyright (C) 2006-2010 Andre Noll <maan@systemlinux.org>
- *
- * Licensed under the GPL v2. For licencing details see COPYING.
- */
-extern char *dss_errlist[];
-extern char *dss_error_txt;
-
-__printf_2_3 void dss_log(int ll, const char* fmt,...);
-
-/**
- * This bit indicates whether a number is considered a system error number
- * If yes, the system errno is just the result of clearing this bit from
- * the given number.
- */
-#define SYSTEM_ERROR_BIT 30
-
-/** Check whether the system error bit is set. */
-#define IS_SYSTEM_ERROR(num) (!!((num) & (1 << SYSTEM_ERROR_BIT)))
-
-/** Set the system error bit for the given number. */
-#define ERRNO_TO_DSS_ERROR(num) ((num) | (1 << SYSTEM_ERROR_BIT))
-
-/**
- * dss' version of strerror(3).
- *
- * \param num The error number.
- *
- * \return The error text of \a num.
- */
-static inline char *dss_strerror(int num)
-{
- assert(num > 0);
- if (IS_SYSTEM_ERROR(num))
- return strerror((num) & ((1 << SYSTEM_ERROR_BIT) - 1));
- else
- return dss_errlist[num];
-}
-
-#define DSS_ERRORS \
- DSS_ERROR(SUCCESS, "success"), \
- DSS_ERROR(SYNTAX, "syntax error"), \
- DSS_ERROR(ATOI_OVERFLOW, "value too large"), \
- DSS_ERROR(STRTOLL, "unknown strtoll error"), \
- DSS_ERROR(ATOI_NO_DIGITS, "no digits found in string"), \
- DSS_ERROR(ATOI_JUNK_AT_END, "further characters after number"), \
- DSS_ERROR(INVALID_NUMBER, "invalid number"), \
- DSS_ERROR(STRFTIME, "strftime() failed"), \
- DSS_ERROR(LOCALTIME, "localtime() failed"), \
- DSS_ERROR(NULL_OPEN, "can not open /dev/null"), \
- DSS_ERROR(DUP_PIPE, "exec error: can not create pipe"), \
- DSS_ERROR(INVOLUNTARY_EXIT, "unexpected termination cause"), \
- DSS_ERROR(BAD_EXIT_CODE, "unexpected exit code"), \
- DSS_ERROR(SIGNAL_SIG_ERR, "signal() returned SIG_ERR"), \
- DSS_ERROR(SIGNAL, "caught terminating signal"), \
- DSS_ERROR(BUG, "values of beta might cause dom!"), \
- DSS_ERROR(NOT_RUNNING, "dss not running")
-
-/**
- * This is temporarily defined to expand to its first argument (prefixed by
- * 'E_') and gets later redefined to expand to the error text only
- */
-#define DSS_ERROR(err, msg) E_ ## err
-
-enum dss_error_codes {
- DSS_ERRORS
-};
-#undef DSS_ERROR
-#define DSS_ERROR(err, msg) msg
-#define DEFINE_DSS_ERRLIST char *dss_errlist[] = {DSS_ERRORS}
#include "gcc-compat.h"
#include "log.h"
-#include "error.h"
-#include "string.h"
+#include "err.h"
+#include "str.h"
/**
* Spawn a new process using execvp().
+++ /dev/null
-/*
- * Copyright (C) 2006-2010 Andre Noll <maan@systemlinux.org>
- *
- * Licensed under the GPL v2. For licencing details see COPYING.
- */
-
-#include <unistd.h>
-#include <assert.h>
-#include <string.h>
-#include <errno.h>
-#include <sys/types.h>
-#include <dirent.h>
-#include <sys/stat.h>
-#include <fcntl.h>
-
-
-#include "gcc-compat.h"
-#include "error.h"
-#include "string.h"
-
-/**
- * Call a function for each subdirectory of the current working directory.
- *
- * \param dirname The directory to traverse.
- * \param func The function to call for each subdirecrtory.
- * \param private_data Pointer to an arbitrary data structure.
- *
- * For each top-level directory under \a dirname, the supplied function \a func is
- * called. The full path of the subdirectory and the \a private_data pointer
- * are passed to \a func.
- *
- * \return This function returns immediately if \a func returned a negative
- * value. In this case \a func must set error_txt and this negative value is
- * returned to the caller. Otherwise the function returns when all
- * subdirectories have been passed to \a func.
- */
-
-int for_each_subdir(int (*func)(const char *, void *), void *private_data)
-{
- struct dirent *entry;
- int ret;
- DIR *dir = opendir(".");
-
- if (!dir)
- return -ERRNO_TO_DSS_ERROR(errno);
- while ((entry = readdir(dir))) {
- mode_t m;
- struct stat s;
-
- if (!strcmp(entry->d_name, "."))
- continue;
- if (!strcmp(entry->d_name, ".."))
- continue;
- ret = lstat(entry->d_name, &s) == -1;
- if (ret == -1) {
- ret = -ERRNO_TO_DSS_ERROR(errno);
- goto out;
- }
- m = s.st_mode;
- if (!S_ISDIR(m))
- continue;
- ret = func(entry->d_name, private_data);
- if (ret < 0)
- goto out;
- }
- ret = 1;
-out:
- closedir(dir);
- return ret;
-}
-/**
- * Wrapper for chdir(2).
- *
- * \param path The specified directory.
- *
- * \return Standard.
- */
-int dss_chdir(const char *path)
-{
- if (chdir(path) >= 0)
- return 1;
- return -ERRNO_TO_DSS_ERROR(errno);
-}
-
-/**
- * Set a file descriptor to non-blocking mode.
- *
- * \param fd The file descriptor.
- *
- * \return Standard.
- */
-__must_check int mark_fd_nonblocking(int fd)
-{
- int flags = fcntl(fd, F_GETFL);
- if (flags < 0)
- return -ERRNO_TO_DSS_ERROR(errno);
- flags = fcntl(fd, F_SETFL, ((long)flags) | O_NONBLOCK);
- if (flags < 0)
- return -ERRNO_TO_DSS_ERROR(errno);
- return 1;
-}
-
-/**
- * dss' wrapper for select(2).
- *
- * It calls select(2) (with no exceptfds) and starts over if select() was
- * interrupted by a signal.
- *
- * \param n The highest-numbered descriptor in any of the two sets, plus 1.
- * \param readfds fds that should be checked for readability.
- * \param writefds fds that should be checked for writablility.
- * \param timeout_tv upper bound on the amount of time elapsed before select()
- * returns.
- *
- * \return The return value of the underlying select() call on success, the
- * negative system error code on errors.
- *
- * All arguments are passed verbatim to select(2).
- * \sa select(2) select_tut(2).
- */
-int dss_select(int n, fd_set *readfds, fd_set *writefds,
- struct timeval *timeout_tv)
-{
- int ret, err;
- do {
- ret = select(n, readfds, writefds, NULL, timeout_tv);
- err = errno;
- } while (ret < 0 && err == EINTR);
- if (ret < 0)
- return -ERRNO_TO_DSS_ERROR(errno);
- return ret;
-}
+++ /dev/null
-/*
- * Copyright (C) 2006-2010 Andre Noll <maan@systemlinux.org>
- *
- * Licensed under the GPL v2. For licencing details see COPYING.
- */
-int dss_chdir(const char *path);
-int for_each_subdir(int (*func)(const char *, void *), void *private_data);
-__must_check int mark_fd_nonblocking(int fd);
-/**
- * A wrapper for rename(2).
- *
- * \param old_path The source path.
- * \param new_path The destination path.
- *
- * \return Standard.
- *
- * \sa rename(2).
- */
-_static_inline_ int dss_rename(const char *old_path, const char *new_path)
-{
- if (rename(old_path, new_path) >= 0)
- return 1;
- return -ERRNO_TO_DSS_ERROR(errno);
-}
-
-int dss_select(int n, fd_set *readfds, fd_set *writefds,
- struct timeval *timeout_tv);
--- /dev/null
+/*
+ * Copyright (C) 2006-2010 Andre Noll <maan@systemlinux.org>
+ *
+ * Licensed under the GPL v2. For licencing details see COPYING.
+ */
+
+#include <unistd.h>
+#include <assert.h>
+#include <string.h>
+#include <errno.h>
+#include <sys/types.h>
+#include <dirent.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+
+
+#include "gcc-compat.h"
+#include "err.h"
+#include "str.h"
+
+/**
+ * Call a function for each subdirectory of the current working directory.
+ *
+ * \param dirname The directory to traverse.
+ * \param func The function to call for each subdirecrtory.
+ * \param private_data Pointer to an arbitrary data structure.
+ *
+ * For each top-level directory under \a dirname, the supplied function \a func is
+ * called. The full path of the subdirectory and the \a private_data pointer
+ * are passed to \a func.
+ *
+ * \return This function returns immediately if \a func returned a negative
+ * value. In this case \a func must set error_txt and this negative value is
+ * returned to the caller. Otherwise the function returns when all
+ * subdirectories have been passed to \a func.
+ */
+
+int for_each_subdir(int (*func)(const char *, void *), void *private_data)
+{
+ struct dirent *entry;
+ int ret;
+ DIR *dir = opendir(".");
+
+ if (!dir)
+ return -ERRNO_TO_DSS_ERROR(errno);
+ while ((entry = readdir(dir))) {
+ mode_t m;
+ struct stat s;
+
+ if (!strcmp(entry->d_name, "."))
+ continue;
+ if (!strcmp(entry->d_name, ".."))
+ continue;
+ ret = lstat(entry->d_name, &s) == -1;
+ if (ret == -1) {
+ ret = -ERRNO_TO_DSS_ERROR(errno);
+ goto out;
+ }
+ m = s.st_mode;
+ if (!S_ISDIR(m))
+ continue;
+ ret = func(entry->d_name, private_data);
+ if (ret < 0)
+ goto out;
+ }
+ ret = 1;
+out:
+ closedir(dir);
+ return ret;
+}
+/**
+ * Wrapper for chdir(2).
+ *
+ * \param path The specified directory.
+ *
+ * \return Standard.
+ */
+int dss_chdir(const char *path)
+{
+ if (chdir(path) >= 0)
+ return 1;
+ return -ERRNO_TO_DSS_ERROR(errno);
+}
+
+/**
+ * Set a file descriptor to non-blocking mode.
+ *
+ * \param fd The file descriptor.
+ *
+ * \return Standard.
+ */
+__must_check int mark_fd_nonblocking(int fd)
+{
+ int flags = fcntl(fd, F_GETFL);
+ if (flags < 0)
+ return -ERRNO_TO_DSS_ERROR(errno);
+ flags = fcntl(fd, F_SETFL, ((long)flags) | O_NONBLOCK);
+ if (flags < 0)
+ return -ERRNO_TO_DSS_ERROR(errno);
+ return 1;
+}
+
+/**
+ * dss' wrapper for select(2).
+ *
+ * It calls select(2) (with no exceptfds) and starts over if select() was
+ * interrupted by a signal.
+ *
+ * \param n The highest-numbered descriptor in any of the two sets, plus 1.
+ * \param readfds fds that should be checked for readability.
+ * \param writefds fds that should be checked for writablility.
+ * \param timeout_tv upper bound on the amount of time elapsed before select()
+ * returns.
+ *
+ * \return The return value of the underlying select() call on success, the
+ * negative system error code on errors.
+ *
+ * All arguments are passed verbatim to select(2).
+ * \sa select(2) select_tut(2).
+ */
+int dss_select(int n, fd_set *readfds, fd_set *writefds,
+ struct timeval *timeout_tv)
+{
+ int ret, err;
+ do {
+ ret = select(n, readfds, writefds, NULL, timeout_tv);
+ err = errno;
+ } while (ret < 0 && err == EINTR);
+ if (ret < 0)
+ return -ERRNO_TO_DSS_ERROR(errno);
+ return ret;
+}
--- /dev/null
+/*
+ * Copyright (C) 2006-2010 Andre Noll <maan@systemlinux.org>
+ *
+ * Licensed under the GPL v2. For licencing details see COPYING.
+ */
+int dss_chdir(const char *path);
+int for_each_subdir(int (*func)(const char *, void *), void *private_data);
+__must_check int mark_fd_nonblocking(int fd);
+/**
+ * A wrapper for rename(2).
+ *
+ * \param old_path The source path.
+ * \param new_path The destination path.
+ *
+ * \return Standard.
+ *
+ * \sa rename(2).
+ */
+_static_inline_ int dss_rename(const char *old_path, const char *new_path)
+{
+ if (rename(old_path, new_path) >= 0)
+ return 1;
+ return -ERRNO_TO_DSS_ERROR(errno);
+}
+
+int dss_select(int n, fd_set *readfds, fd_set *writefds,
+ struct timeval *timeout_tv);
#include <sys/param.h>
#include "gcc-compat.h"
-#include "string.h"
+#include "str.h"
#include "log.h"
#include "gcc-compat.h"
-#include "error.h"
+#include "err.h"
#if (defined(__GNUC__) && defined(__i386__))
#define get16bits(d) (*((const uint16_t *) (d)))
--- /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 <errno.h>
+#include <signal.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <dirent.h>
+#include <assert.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <signal.h>
+#include <stdlib.h>
+#include <sys/select.h>
+
+
+#include "gcc-compat.h"
+#include "err.h"
+#include "log.h"
+#include "str.h"
+#include "file.h"
+
+static int signal_pipe[2];
+
+/**
+ * Initialize the signal subsystem.
+ *
+ * This function creates a pipe, the signal pipe, to deliver pending signals to
+ * the application (Bernstein's trick). It should be called during the
+ * application's startup part, followed by subsequent calls to
+ * install_sighandler() for each signal that should be caught.
+ *
+ * signal_init() installs a generic signal handler which is used for all
+ * signals simultaneously. When a signal arrives, this generic signal handler
+ * writes the corresponding signal number to the signal pipe so that the
+ * application can test for pending signals simply by checking the signal pipe
+ * for reading, e.g. by using the select(2) system call.
+ *
+ * \return This function either succeeds or calls exit(2) to terminate
+ * the current process. On success, the file descriptor of the signal pipe is
+ * returned.
+ */
+int signal_init(void)
+{
+ int ret;
+ if (pipe(signal_pipe) < 0) {
+ ret = -ERRNO_TO_DSS_ERROR(errno);
+ goto err_out;
+ }
+ ret = mark_fd_nonblocking(signal_pipe[0]);
+ if (ret < 0)
+ goto err_out;
+ ret = mark_fd_nonblocking(signal_pipe[1]);
+ if (ret < 0)
+ goto err_out;
+ return signal_pipe[0];
+err_out:
+ DSS_EMERG_LOG("%s\n", dss_strerror(-ret));
+ exit(EXIT_FAILURE);
+}
+
+/*
+ * just write one integer to signal pipe
+ */
+static void generic_signal_handler(int s)
+{
+ write(signal_pipe[1], &s, sizeof(int));
+}
+
+/**
+ * Reap one child.
+ *
+ * \param pid In case a child died, its pid is returned here.
+ *
+ * Call waitpid() and print a log message containing the pid and the cause of
+ * the child's death.
+ *
+ * \return A (negative) error code on errors, zero, if no child died, one
+ * otherwise. If and only if the function returns one, the content of \a pid is
+ * meaningful.
+ *
+ * \sa waitpid(2)
+ */
+int reap_child(pid_t *pid, int *status)
+{
+ *pid = waitpid(-1, status, WNOHANG);
+
+ if (!*pid)
+ return 0;
+ if (*pid < 0)
+ return -ERRNO_TO_DSS_ERROR(errno);
+ if (WIFEXITED(*status))
+ DSS_DEBUG_LOG("child %i exited. Exit status: %i\n", (int)*pid,
+ WEXITSTATUS(*status));
+ else if (WIFSIGNALED(*status))
+ DSS_DEBUG_LOG("child %i was killed by signal %i\n", (int)*pid,
+ WTERMSIG(*status));
+ else
+ DSS_WARNING_LOG("child %i terminated abormally\n", (int)*pid);
+ return 1;
+}
+
+/**
+ * Wrapper around signal(2)
+ *
+ * \param sig The number of the signal to catch.
+ *
+ * This installs the generic signal handler for the given signal.
+ *
+ * \return This function returns 1 on success and \p -E_SIGNAL_SIG_ERR on errors.
+ * \sa signal(2)
+ */
+int install_sighandler(int sig)
+{
+ DSS_DEBUG_LOG("catching signal %d\n", sig);
+ if (signal(sig, &generic_signal_handler) != SIG_ERR)
+ return 1;
+ return -E_SIGNAL_SIG_ERR;
+}
+
+/**
+ * Return number of next pending signal.
+ *
+ * This should be called if the fd for the signal pipe is ready for reading.
+ *
+ * \return On success, the number of the received signal is returned.
+ * If the read was interrupted by another signal the function returns 0.
+ * Otherwise a negative error code is returned.
+ */
+int next_signal(void)
+{
+ int s, err;
+ ssize_t r;
+
+ r = read(signal_pipe[0], &s, sizeof(s));
+ if (r == sizeof(s)) {
+ DSS_DEBUG_LOG("next signal: %d\n", s);
+ return s;
+ }
+ err = errno;
+ assert(r < 0);
+ if (err == EAGAIN)
+ return 0;
+ DSS_ERROR_LOG("failed to read from signal pipe\n");
+ return -ERRNO_TO_DSS_ERROR(err);
+}
+
+/**
+ * Close the signal pipe.
+ */
+void signal_shutdown(void)
+{
+ close(signal_pipe[1]);
+}
--- /dev/null
+/*
+ * Copyright (C) 2007-2010 Andre Noll <maan@systemlinux.org>
+ *
+ * Licensed under the GPL v2. For licencing details see COPYING.
+ */
+
+int signal_init(void);
+int install_sighandler(int);
+int next_signal(void);
+void signal_shutdown(void);
+int reap_child(pid_t *pid, int *status);
+++ /dev/null
-/*
- * Copyright (C) 2004-2010 Andre Noll <maan@systemlinux.org>
- *
- * Licensed under the GPL v2. For licencing details see COPYING.
- */
-/** \file signal.c Signal handling functions. */
-
-#include <string.h>
-#include <errno.h>
-#include <signal.h>
-#include <sys/types.h>
-#include <sys/wait.h>
-#include <dirent.h>
-#include <assert.h>
-#include <stdio.h>
-#include <unistd.h>
-#include <signal.h>
-#include <stdlib.h>
-#include <sys/select.h>
-
-
-#include "gcc-compat.h"
-#include "error.h"
-#include "log.h"
-#include "string.h"
-#include "fd.h"
-
-static int signal_pipe[2];
-
-/**
- * Initialize the signal subsystem.
- *
- * This function creates a pipe, the signal pipe, to deliver pending signals to
- * the application (Bernstein's trick). It should be called during the
- * application's startup part, followed by subsequent calls to
- * install_sighandler() for each signal that should be caught.
- *
- * signal_init() installs a generic signal handler which is used for all
- * signals simultaneously. When a signal arrives, this generic signal handler
- * writes the corresponding signal number to the signal pipe so that the
- * application can test for pending signals simply by checking the signal pipe
- * for reading, e.g. by using the select(2) system call.
- *
- * \return This function either succeeds or calls exit(2) to terminate
- * the current process. On success, the file descriptor of the signal pipe is
- * returned.
- */
-int signal_init(void)
-{
- int ret;
- if (pipe(signal_pipe) < 0) {
- ret = -ERRNO_TO_DSS_ERROR(errno);
- goto err_out;
- }
- ret = mark_fd_nonblocking(signal_pipe[0]);
- if (ret < 0)
- goto err_out;
- ret = mark_fd_nonblocking(signal_pipe[1]);
- if (ret < 0)
- goto err_out;
- return signal_pipe[0];
-err_out:
- DSS_EMERG_LOG("%s\n", dss_strerror(-ret));
- exit(EXIT_FAILURE);
-}
-
-/*
- * just write one integer to signal pipe
- */
-static void generic_signal_handler(int s)
-{
- write(signal_pipe[1], &s, sizeof(int));
-}
-
-/**
- * Reap one child.
- *
- * \param pid In case a child died, its pid is returned here.
- *
- * Call waitpid() and print a log message containing the pid and the cause of
- * the child's death.
- *
- * \return A (negative) error code on errors, zero, if no child died, one
- * otherwise. If and only if the function returns one, the content of \a pid is
- * meaningful.
- *
- * \sa waitpid(2)
- */
-int reap_child(pid_t *pid, int *status)
-{
- *pid = waitpid(-1, status, WNOHANG);
-
- if (!*pid)
- return 0;
- if (*pid < 0)
- return -ERRNO_TO_DSS_ERROR(errno);
- if (WIFEXITED(*status))
- DSS_DEBUG_LOG("child %i exited. Exit status: %i\n", (int)*pid,
- WEXITSTATUS(*status));
- else if (WIFSIGNALED(*status))
- DSS_DEBUG_LOG("child %i was killed by signal %i\n", (int)*pid,
- WTERMSIG(*status));
- else
- DSS_WARNING_LOG("child %i terminated abormally\n", (int)*pid);
- return 1;
-}
-
-/**
- * Wrapper around signal(2)
- *
- * \param sig The number of the signal to catch.
- *
- * This installs the generic signal handler for the given signal.
- *
- * \return This function returns 1 on success and \p -E_SIGNAL_SIG_ERR on errors.
- * \sa signal(2)
- */
-int install_sighandler(int sig)
-{
- DSS_DEBUG_LOG("catching signal %d\n", sig);
- if (signal(sig, &generic_signal_handler) != SIG_ERR)
- return 1;
- return -E_SIGNAL_SIG_ERR;
-}
-
-/**
- * Return number of next pending signal.
- *
- * This should be called if the fd for the signal pipe is ready for reading.
- *
- * \return On success, the number of the received signal is returned.
- * If the read was interrupted by another signal the function returns 0.
- * Otherwise a negative error code is returned.
- */
-int next_signal(void)
-{
- int s, err;
- ssize_t r;
-
- r = read(signal_pipe[0], &s, sizeof(s));
- if (r == sizeof(s)) {
- DSS_DEBUG_LOG("next signal: %d\n", s);
- return s;
- }
- err = errno;
- assert(r < 0);
- if (err == EAGAIN)
- return 0;
- DSS_ERROR_LOG("failed to read from signal pipe\n");
- return -ERRNO_TO_DSS_ERROR(err);
-}
-
-/**
- * Close the signal pipe.
- */
-void signal_shutdown(void)
-{
- close(signal_pipe[1]);
-}
+++ /dev/null
-/*
- * Copyright (C) 2007-2010 Andre Noll <maan@systemlinux.org>
- *
- * Licensed under the GPL v2. For licencing details see COPYING.
- */
-
-/** \file signal.h exported symbols from signal.c */
-
-int signal_init(void);
-int install_sighandler(int);
-int next_signal(void);
-void signal_shutdown(void);
-int reap_child(pid_t *pid, int *status);
#include <sys/time.h>
#include "gcc-compat.h"
-#include "error.h"
+#include "err.h"
#include "snap.h"
-#include "string.h"
-#include "time.h"
-#include "fd.h"
+#include "str.h"
+#include "tv.h"
+#include "file.h"
/**
* Wrapper for isdigit.
--- /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 "err.h"
+#include "str.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;
+}
--- /dev/null
+__must_check __malloc void *dss_realloc(void *p, size_t size);
+__must_check __malloc void *dss_malloc(size_t size);
+__must_check __malloc void *dss_calloc(size_t size);
+__must_check __printf_1_2 __malloc char *make_message(const char *fmt, ...);
+__must_check __malloc char *dss_strdup(const char *s);
+__must_check __malloc char *get_homedir(void);
+int dss_atoi64(const char *str, int64_t *value);
+__must_check __malloc char *dss_logname(void);
+unsigned split_args(char *args, char *** const argv_ptr, const char *delim);
+
+
+/** \cond LLONG_MAX and LLONG_LIN might not be defined. */
+#ifndef LLONG_MAX
+#define LLONG_MAX (1 << (sizeof(long) - 1))
+#endif
+#ifndef LLONG_MIN
+#define LLONG_MIN (-LLONG_MAX - 1LL)
+#endif
+/** \endcond */
+
+++ /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;
-}
+++ /dev/null
-__must_check __malloc void *dss_realloc(void *p, size_t size);
-__must_check __malloc void *dss_malloc(size_t size);
-__must_check __malloc void *dss_calloc(size_t size);
-__must_check __printf_1_2 __malloc char *make_message(const char *fmt, ...);
-__must_check __malloc char *dss_strdup(const char *s);
-__must_check __malloc char *get_homedir(void);
-int dss_atoi64(const char *str, int64_t *value);
-__must_check __malloc char *dss_logname(void);
-unsigned split_args(char *args, char *** const argv_ptr, const char *delim);
-
-
-/** \cond LLONG_MAX and LLONG_LIN might not be defined. */
-#ifndef LLONG_MAX
-#define LLONG_MAX (1 << (sizeof(long) - 1))
-#endif
-#ifndef LLONG_MIN
-#define LLONG_MIN (-LLONG_MAX - 1LL)
-#endif
-/** \endcond */
-
+++ /dev/null
-/*
- * Copyright (C) 2005-2010 Andre Noll <maan@systemlinux.org>
- *
- * Licensed under the GPL v2. For licencing details see COPYING.
- */
-
-/** \file time.c Helper functions for dealing with time values. */
-
-#include <sys/time.h>
-#include <time.h>
-#include <inttypes.h>
-#include <assert.h>
-#include <string.h>
-
-#include "gcc-compat.h"
-#include "error.h"
-#include "string.h"
-#include "log.h"
-
-/**
- * Convert struct timeval to milliseconds.
- *
- * \param tv The time value value to convert.
- *
- * \return The number off milliseconds in \a tv.
- */
-long unsigned tv2ms(const struct timeval *tv)
-{
- return tv->tv_sec * 1000 + (tv->tv_usec + 500)/ 1000;
-}
-
-/**
- * Convert milliseconds to a struct timeval.
- *
- * \param n The number of milliseconds.
- * \param tv Result pointer.
- */
-void ms2tv(long unsigned n, struct timeval *tv)
-{
- tv->tv_sec = n / 1000;
- tv->tv_usec = (n % 1000) * 1000;
-}
-
-/**
- * Convert a double to a struct timeval.
- *
- * \param x The value to convert.
- * \param tv Result pointer.
- */
-void d2tv(double x, struct timeval *tv)
-{
- tv->tv_sec = x;
- tv->tv_usec = (x - (double)tv->tv_sec) * 1000.0 * 1000.0 + 0.5;
-}
-
-/**
- * Compute the difference of two time values.
- *
- * \param b Minuend.
- * \param a Subtrahend.
- * \param diff Result pointer.
- *
- * If \a diff is not \p NULL, it contains the absolute value |\a b - \a a| on
- * return.
- *
- * \return If \a b < \a a, this function returns -1, otherwise it returns 1.
- */
-int tv_diff(const struct timeval *b, const struct timeval *a, struct timeval *diff)
-{
- int ret = 1;
-
- if ((b->tv_sec < a->tv_sec) ||
- ((b->tv_sec == a->tv_sec) && (b->tv_usec < a->tv_usec))) {
- const struct timeval *tmp = a;
- a = b;
- b = tmp;
- ret = -1;
- }
- if (!diff)
- return ret;
- diff->tv_sec = b->tv_sec - a->tv_sec;
- if (b->tv_usec < a->tv_usec) {
- diff->tv_sec--;
- diff->tv_usec = 1000 * 1000 - a->tv_usec + b->tv_usec;
- } else
- diff->tv_usec = b->tv_usec - a->tv_usec;
- return ret;
-}
-
-/**
- * Add two time values.
- *
- * \param a First addend.
- * \param b Second addend.
- * \param sum Contains the sum \a + \a b on return.
- */
-void tv_add(const struct timeval *a, const struct timeval *b,
- struct timeval *sum)
-{
- sum->tv_sec = a->tv_sec + b->tv_sec;
- if (a->tv_usec + b->tv_usec >= 1000 * 1000) {
- sum->tv_sec++;
- sum->tv_usec = a->tv_usec + b->tv_usec - 1000 * 1000;
- } else
- sum->tv_usec = a->tv_usec + b->tv_usec;
-}
-
-/**
- * Compute integer multiple of given struct timeval.
- *
- * \param mult The integer value to multiply with.
- * \param tv The timevalue to multiply.
- *
- * \param result Contains \a mult * \a tv on return.
- */
-void tv_scale(const unsigned long mult, const struct timeval *tv,
- struct timeval *result)
-{
- result->tv_sec = mult * tv->tv_sec;
- result->tv_sec += tv->tv_usec * mult / 1000 / 1000;
- result->tv_usec = tv->tv_usec * mult % (1000 * 1000);
-}
-
-/**
- * Compute a fraction of given struct timeval.
- *
- * \param divisor The integer value to divide by.
- * \param tv The timevalue to divide.
- * \param result Contains (1 / mult) * tv on return.
- */
-void tv_divide(const unsigned long divisor, const struct timeval *tv,
- struct timeval *result)
-{
- uint64_t x = ((uint64_t)tv->tv_sec * 1000 * 1000 + tv->tv_usec) / divisor;
-
- result->tv_sec = x / 1000 / 1000;
- result->tv_usec = x % (1000 * 1000);
-}
-
-int64_t get_current_time(void)
-{
- time_t now;
- time(&now);
- DSS_DEBUG_LOG("now: %jd\n", (intmax_t)now);
- return (int64_t)now;
-}
+++ /dev/null
-int tv_diff(const struct timeval *b, const struct timeval *a, struct timeval *diff);
-long unsigned tv2ms(const struct timeval*);
-void d2tv(double, struct timeval*);
-void tv_add(const struct timeval*, const struct timeval *, struct timeval *);
-void tv_scale(const unsigned long, const struct timeval *, struct timeval *);
-void tv_divide(const unsigned long divisor, const struct timeval *tv,
- struct timeval *result);
-void ms2tv(const long unsigned n, struct timeval *tv);
-int64_t get_current_time(void);
--- /dev/null
+/*
+ * Copyright (C) 2005-2010 Andre Noll <maan@systemlinux.org>
+ *
+ * Licensed under the GPL v2. For licencing details see COPYING.
+ */
+
+#include <sys/time.h>
+#include <time.h>
+#include <inttypes.h>
+#include <assert.h>
+#include <string.h>
+
+#include "gcc-compat.h"
+#include "err.h"
+#include "str.h"
+#include "log.h"
+
+/**
+ * Convert struct timeval to milliseconds.
+ *
+ * \param tv The time value value to convert.
+ *
+ * \return The number off milliseconds in \a tv.
+ */
+long unsigned tv2ms(const struct timeval *tv)
+{
+ return tv->tv_sec * 1000 + (tv->tv_usec + 500)/ 1000;
+}
+
+/**
+ * Convert milliseconds to a struct timeval.
+ *
+ * \param n The number of milliseconds.
+ * \param tv Result pointer.
+ */
+void ms2tv(long unsigned n, struct timeval *tv)
+{
+ tv->tv_sec = n / 1000;
+ tv->tv_usec = (n % 1000) * 1000;
+}
+
+/**
+ * Convert a double to a struct timeval.
+ *
+ * \param x The value to convert.
+ * \param tv Result pointer.
+ */
+void d2tv(double x, struct timeval *tv)
+{
+ tv->tv_sec = x;
+ tv->tv_usec = (x - (double)tv->tv_sec) * 1000.0 * 1000.0 + 0.5;
+}
+
+/**
+ * Compute the difference of two time values.
+ *
+ * \param b Minuend.
+ * \param a Subtrahend.
+ * \param diff Result pointer.
+ *
+ * If \a diff is not \p NULL, it contains the absolute value |\a b - \a a| on
+ * return.
+ *
+ * \return If \a b < \a a, this function returns -1, otherwise it returns 1.
+ */
+int tv_diff(const struct timeval *b, const struct timeval *a, struct timeval *diff)
+{
+ int ret = 1;
+
+ if ((b->tv_sec < a->tv_sec) ||
+ ((b->tv_sec == a->tv_sec) && (b->tv_usec < a->tv_usec))) {
+ const struct timeval *tmp = a;
+ a = b;
+ b = tmp;
+ ret = -1;
+ }
+ if (!diff)
+ return ret;
+ diff->tv_sec = b->tv_sec - a->tv_sec;
+ if (b->tv_usec < a->tv_usec) {
+ diff->tv_sec--;
+ diff->tv_usec = 1000 * 1000 - a->tv_usec + b->tv_usec;
+ } else
+ diff->tv_usec = b->tv_usec - a->tv_usec;
+ return ret;
+}
+
+/**
+ * Add two time values.
+ *
+ * \param a First addend.
+ * \param b Second addend.
+ * \param sum Contains the sum \a + \a b on return.
+ */
+void tv_add(const struct timeval *a, const struct timeval *b,
+ struct timeval *sum)
+{
+ sum->tv_sec = a->tv_sec + b->tv_sec;
+ if (a->tv_usec + b->tv_usec >= 1000 * 1000) {
+ sum->tv_sec++;
+ sum->tv_usec = a->tv_usec + b->tv_usec - 1000 * 1000;
+ } else
+ sum->tv_usec = a->tv_usec + b->tv_usec;
+}
+
+/**
+ * Compute integer multiple of given struct timeval.
+ *
+ * \param mult The integer value to multiply with.
+ * \param tv The timevalue to multiply.
+ *
+ * \param result Contains \a mult * \a tv on return.
+ */
+void tv_scale(const unsigned long mult, const struct timeval *tv,
+ struct timeval *result)
+{
+ result->tv_sec = mult * tv->tv_sec;
+ result->tv_sec += tv->tv_usec * mult / 1000 / 1000;
+ result->tv_usec = tv->tv_usec * mult % (1000 * 1000);
+}
+
+/**
+ * Compute a fraction of given struct timeval.
+ *
+ * \param divisor The integer value to divide by.
+ * \param tv The timevalue to divide.
+ * \param result Contains (1 / mult) * tv on return.
+ */
+void tv_divide(const unsigned long divisor, const struct timeval *tv,
+ struct timeval *result)
+{
+ uint64_t x = ((uint64_t)tv->tv_sec * 1000 * 1000 + tv->tv_usec) / divisor;
+
+ result->tv_sec = x / 1000 / 1000;
+ result->tv_usec = x % (1000 * 1000);
+}
+
+int64_t get_current_time(void)
+{
+ time_t now;
+ time(&now);
+ DSS_DEBUG_LOG("now: %jd\n", (intmax_t)now);
+ return (int64_t)now;
+}
--- /dev/null
+int tv_diff(const struct timeval *b, const struct timeval *a, struct timeval *diff);
+long unsigned tv2ms(const struct timeval*);
+void d2tv(double, struct timeval*);
+void tv_add(const struct timeval*, const struct timeval *, struct timeval *);
+void tv_scale(const unsigned long, const struct timeval *, struct timeval *);
+void tv_divide(const unsigned long divisor, const struct timeval *tv,
+ struct timeval *result);
+void ms2tv(const long unsigned n, struct timeval *tv);
+int64_t get_current_time(void);
projects / dss.git / commitdiff