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start_stop_daemon: add -N <nice> compat

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[re]nice: add support for -nNNN w/o spaces, -NNN (nice only),
          simplified code
This commit is contained in:
Denis Vlasenko 2006-10-08 23:36:17 +00:00
parent 7039a66b58
commit ca3c981c07
6 changed files with 87 additions and 92 deletions
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44
coreutils/nice.c
View File

@ -7,39 +7,14 @@
* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <limits.h>
#include <errno.h>
#include <unistd.h>
#include <sys/resource.h>
#include "busybox.h"
static inline int int_add_no_wrap(int a, int b)
{
int s = a + b;
if (b < 0) {
if (s > a) s = INT_MIN;
} else {
if (s < a) s = INT_MAX;
}
return s;
}
int nice_main(int argc, char **argv)
{
static const char Xetpriority_msg[] = "cannot %cet priority";
int old_priority, adjustment;
errno = 0; /* Needed for getpriority error detection. */
old_priority = getpriority(PRIO_PROCESS, 0);
if (errno) {
bb_perror_msg_and_die(Xetpriority_msg, 'g');
}
if (!*++argv) { /* No args, so (GNU) output current nice value. */
bb_printf("%d\n", old_priority);
@ -48,19 +23,26 @@ int nice_main(int argc, char **argv)
adjustment = 10; /* Set default adjustment. */
if ((argv[0][0] == '-') && (argv[0][1] == 'n') && !argv[0][2]) { /* "-n" */
if (argv[0][0] == '-') {
if (argv[0][1] == 'n') { /* -n */
if (argv[0][2]) { /* -nNNNN (w/o space) */
argv[0] += 2; argv--; argc++;
}
} else { /* -NNN (NNN may be negative) == -n NNN */
argv[0] += 1; argv--; argc++;
}
if (argc < 4) { /* Missing priority and/or utility! */
bb_show_usage();
}
adjustment = xatoi(argv[1]);
adjustment = xatoi_range(argv[1], INT_MIN/2, INT_MAX/2);
argv += 2;
}
{ /* Set our priority. Handle integer wrapping for old + adjust. */
int new_priority = int_add_no_wrap(old_priority, adjustment);
{ /* Set our priority. */
int prio = old_priority + adjustment;
if (setpriority(PRIO_PROCESS, 0, new_priority) < 0) {
bb_perror_msg_and_die(Xetpriority_msg, 's');
if (setpriority(PRIO_PROCESS, 0, prio) < 0) {
bb_perror_msg_and_die("setpriority(%d)", prio);
}
}

41
debianutils/start_stop_daemon.c
View File

@ -10,6 +10,7 @@
#include "busybox.h"
#include <getopt.h>
#include <sys/resource.h>
static int signal_nr = 15;
static int user_id = -1;
@ -199,6 +200,7 @@ static const struct option ssd_long_options[] = {
#if ENABLE_FEATURE_START_STOP_DAEMON_FANCY
{ "oknodo", 0, NULL, 'o' },
{ "verbose", 0, NULL, 'v' },
{ "nicelevel", 1, NULL, 'N' },
#endif
{ "startas", 1, NULL, 'a' },
{ "name", 1, NULL, 'n' },
@ -214,15 +216,15 @@ static const struct option ssd_long_options[] = {
};
#endif
#define SSD_CTX_STOP 1
#define SSD_CTX_START 2
#define SSD_OPT_BACKGROUND 4
#define SSD_OPT_QUIET 8
#define SSD_OPT_MAKEPID 16
#define SSD_CTX_STOP 0x1
#define SSD_CTX_START 0x2
#define SSD_OPT_BACKGROUND 0x4
#define SSD_OPT_QUIET 0x8
#define SSD_OPT_MAKEPID 0x10
#if ENABLE_FEATURE_START_STOP_DAEMON_FANCY
#define SSD_OPT_OKNODO 32
#define SSD_OPT_VERBOSE 64
#define SSD_OPT_OKNODO 0x20
#define SSD_OPT_VERBOSE 0x40
#define SSD_OPT_NICELEVEL 0x80
#endif
int start_stop_daemon_main(int argc, char **argv)
@ -233,6 +235,7 @@ int start_stop_daemon_main(int argc, char **argv)
#if ENABLE_FEATURE_START_STOP_DAEMON_FANCY
// char *retry_arg = NULL;
// int retries = -1;
char *opt_N;
#endif
#if ENABLE_FEATURE_START_STOP_DAEMON_LONG_OPTIONS
applet_long_options = ssd_long_options;
@ -241,9 +244,10 @@ int start_stop_daemon_main(int argc, char **argv)
/* Check required one context option was given */
opt_complementary = "K:S:?:K--S:S--K:m?p:K?xpun:S?xa";
opt = getopt32(argc, argv, "KSbqm"
// USE_FEATURE_START_STOP_DAEMON_FANCY("ovR:")
USE_FEATURE_START_STOP_DAEMON_FANCY("ov")
// USE_FEATURE_START_STOP_DAEMON_FANCY("ovN:R:")
USE_FEATURE_START_STOP_DAEMON_FANCY("ovN:")
"a:n:s:u:c:x:p:"
USE_FEATURE_START_STOP_DAEMON_FANCY(,&opt_N)
// USE_FEATURE_START_STOP_DAEMON_FANCY(,&retry_arg)
,&startas, &cmdname, &signame, &userspec, &chuid, &execname, &pidfile);
@ -279,7 +283,7 @@ int start_stop_daemon_main(int argc, char **argv)
if (found) {
if (!quiet)
printf("%s already running.\n%d\n", execname ,found->pid);
printf("%s already running\n%d\n", execname, found->pid);
USE_FEATURE_START_STOP_DAEMON_FANCY(return !(opt & SSD_OPT_OKNODO);)
SKIP_FEATURE_START_STOP_DAEMON_FANCY(return EXIT_FAILURE;)
}
@ -296,11 +300,20 @@ int start_stop_daemon_main(int argc, char **argv)
fprintf(pidf, "%d\n", pidt);
fclose(pidf);
}
if(chuid) {
if(sscanf(chuid, "%d", &user_id) != 1)
if (chuid) {
if (sscanf(chuid, "%d", &user_id) != 1)
user_id = bb_xgetpwnam(chuid);
setuid(user_id);
xsetuid(user_id);
}
#if ENABLE_FEATURE_START_STOP_DAEMON_FANCY
if (opt & SSD_OPT_NICELEVEL) {
/* Set process priority */
int prio = getpriority(PRIO_PROCESS, 0) + xatoi_range(opt_N, INT_MIN/2, INT_MAX/2);
if (setpriority(PRIO_PROCESS, 0, prio) < 0) {
bb_perror_msg_and_die("setpriority(%d)", prio);
}
}
#endif
execv(startas, argv);
bb_perror_msg_and_die ("unable to start %s", startas);
}

1
include/libbb.h
View File

@ -346,6 +346,7 @@ long xatol_sfx(const char *numstr, const struct suffix_mult *suffixes);
long xatol(const char *numstr);
/* Specialized: */
unsigned xatou(const char *numstr);
int xatoi_range(const char *numstr, int lower, int upper);
int xatoi(const char *numstr);
/* Using xatoi() instead of naive atoi() is not always convenient -
* in many places people want *non-negative* values, but store them

1
include/usage.h
View File

@ -2691,6 +2691,7 @@ USE_FEATURE_MDEV_CONFIG( \
USE_FEATURE_START_STOP_DAEMON_FANCY( \
"\n\t-o|--oknodo\t\t\texit status 0 if nothing done" \
"\n\t-v|--verbose\t\t\tbe verbose" \
"\n\t-N|--nicelevel <N>\t\tadd N to process's nice level" \
) \
"\n\t-s|--signal <signal>\t\tsignal to send (default TERM)" \
"\n\t-U|--chuid <username>|<uid>\tstart process with this name"

5
libbb/xatol.c
View File

@ -189,6 +189,11 @@ unsigned xatou(const char *numstr)
return xatoul_range(numstr, 0, UINT_MAX);
}
int xatoi_range(const char *numstr, int lower, int upper)
{
return xatol_range(numstr, lower, upper);
}
int xatoi(const char *numstr)
{
return xatol_range(numstr, INT_MIN, INT_MAX);

51
procps/renice.c
View File

@ -38,68 +38,61 @@
#error Assumption violated : PRIO_USER value
#endif
static inline int int_add_no_wrap(int a, int b)
{
int s = a + b;
if (b < 0) {
if (s > a) s = INT_MIN;
} else {
if (s < a) s = INT_MAX;
}
return s;
}
int renice_main(int argc, char **argv)
{
static const char Xetpriority_msg[] = "%d: %cetpriority";
static const char Xetpriority_msg[] = "%cetpriority";
int retval = EXIT_SUCCESS;
int which = PRIO_PROCESS; /* Default 'which' value. */
int use_relative = 0;
int adjustment, new_priority;
unsigned who;
char *arg;
++argv;
arg = *++argv;
/* Check if we are using a relative adjustment. */
if (argv[0] && (argv[0][0] == '-') && (argv[0][1] == 'n') && !argv[0][2]) {
if (arg && arg[0] == '-' && arg[1] == 'n') {
use_relative = 1;
++argv;
if (!arg[2])
arg = *++argv;
else
arg += 2;
}
if (!*argv) { /* No args? Then show usage. */
if (!arg) { /* No args? Then show usage. */
bb_show_usage();
}
/* Get the priority adjustment (absolute or relative). */
adjustment = xatoi(*argv);
adjustment = xatoi_range(arg, INT_MIN/2, INT_MAX/2);
while (*++argv) {
while ((arg = *++argv) != NULL) {
/* Check for a mode switch. */
if ((argv[0][0] == '-') && argv[0][1] && !argv[0][2]) {
if (arg[0] == '-' && arg[1]) {
static const char opts[]
= { 'p', 'g', 'u', 0, PRIO_PROCESS, PRIO_PGRP, PRIO_USER };
const char *p = strchr(opts, argv[0][1]);
const char *p = strchr(opts, arg[1]);
if (p) {
which = p[4];
if (!arg[2])
continue;
arg += 2;
}
}
/* Process an ID arg. */
if (which == PRIO_USER) {
struct passwd *p;
p = getpwnam(*argv);
p = getpwnam(arg);
if (!p) {
bb_error_msg("unknown user: %s", *argv);
bb_error_msg("unknown user: %s", arg);
goto HAD_ERROR;
}
who = p->pw_uid;
} else {
if (safe_strtou(*argv, &who)) {
bb_error_msg("bad value: %s", *argv);
if (safe_strtou(arg, &who)) {
bb_error_msg("bad value: %s", arg);
goto HAD_ERROR;
}
}
@ -111,11 +104,11 @@ int renice_main(int argc, char **argv)
errno = 0; /* Needed for getpriority error detection. */
old_priority = getpriority(which, who);
if (errno) {
bb_perror_msg(Xetpriority_msg, who, 'g');
bb_perror_msg(Xetpriority_msg, 'g');
goto HAD_ERROR;
}
new_priority = int_add_no_wrap(old_priority, adjustment);
new_priority = old_priority + adjustment;
} else {
new_priority = adjustment;
}
@ -124,7 +117,7 @@ int renice_main(int argc, char **argv)
continue;
}
bb_perror_msg(Xetpriority_msg, who, 's');
bb_perror_msg(Xetpriority_msg, 's');
HAD_ERROR:
retval = EXIT_FAILURE;
}