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Audit renice(1)

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1) Get rid of strtop(), which was a NiH-version of estrtonum().
2) Boolean-style-fixes.
3) Update usage, reflecting num-idiom, also update manpage accordingly.
4) Don't break after usage().
5) Rewrite main loop with *argv instead of argv[i].
6) Don't play around with who < 0 and stuff.
7) Rename status to ret for consistency.
This commit is contained in:
FRIGN 2015-03-17 22:15:09 +01:00
parent c7deb4f2b7
commit 4d946a274f
2 changed files with 20 additions and 47 deletions
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10
renice.1
View File

@ -1,4 +1,4 @@
.Dd January 29, 2015
.Dd March 17, 2015
.Dt RENICE 1
.Os sbase
.Sh NAME
@ -6,7 +6,7 @@
.Nd change niceness of processes
.Sh SYNOPSIS
.Nm
.Fl n Ar inc
.Fl n Ar num
.Op Fl g | Fl p | Fl u
.Ar id ...
.Sh DESCRIPTION
@ -21,14 +21,14 @@ Interpret each
.Ar id
as a process group ID | process ID | user name or ID.
The middle option is default.
.It Fl n Ar inc
.It Fl n Ar num
Change niceness by
.Ar inc ,
.Ar num ,
with niceness ranging from
.Sy -20
(highest priority)
to
.Sy +19
.Sy +20
(lowest priority).
.El
.Sh SEE ALSO

57
renice.c
View File

@ -7,35 +7,12 @@
#include "util.h"
static int strtop(const char *);
static int renice(int, int, long);
static int
strtop(const char *s)
{
char *end;
long n;
errno = 0;
n = strtol(s, &end, 10);
if (*end != '\0') {
weprintf("%s: not an integer\n", s);
return -1;
}
if (errno != 0 || n <= 0 || n > INT_MAX) {
weprintf("%s: invalid value\n", s);
return -1;
}
return (int)n;
}
static int
renice(int which, int who, long adj)
{
errno = 0;
adj += getpriority(which, who);
if (errno != 0) {
if (errno) {
weprintf("getpriority %d:", who);
return 0;
}
@ -52,7 +29,7 @@ renice(int which, int who, long adj)
static void
usage(void)
{
eprintf("renice -n inc [-g | -p | -u] ID ...\n");
eprintf("renice -n num [-g | -p | -u] id ...\n");
}
int
@ -60,7 +37,7 @@ main(int argc, char *argv[])
{
const char *adj = NULL;
long val;
int i, which = PRIO_PROCESS, status = 0;
int which = PRIO_PROCESS, ret = 0;
struct passwd *pw;
int who;
@ -79,34 +56,30 @@ main(int argc, char *argv[])
break;
default:
usage();
break;
} ARGEND;
if (argc == 0 || !adj)
if (!argc || !adj)
usage();
val = estrtonum(adj, PRIO_MIN, PRIO_MAX);
for (i = 0; i < argc; i++) {
who = -1;
for (; *argv; argc--, argv++) {
if (which == PRIO_USER) {
errno = 0;
pw = getpwnam(argv[i]);
if (!pw) {
if (errno != 0)
weprintf("getpwnam %s:", argv[i]);
if (!(pw = getpwnam(*argv))) {
if (errno)
weprintf("getpwnam %s:", *argv);
else
weprintf("getpwnam %s: no user found\n", argv[i]);
status = 1;
weprintf("getpwnam %s: no user found\n", *argv);
ret = 1;
continue;
}
who = pw->pw_uid;
} else {
who = estrtonum(*argv, 1, INT_MAX);
}
if (who < 0)
who = strtop(argv[i]);
if (who < 0 || !renice(which, who, val))
status = 1;
if (!renice(which, who, val))
ret = 1;
}
return status;
return ret;
}