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switch to using /proc/<pid>/status on Linux

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This commit is contained in:
Wichert Akkerman 2001-04-12 09:10:24 +00:00
parent 8d15e210fd
commit d5c2daef10
1 changed files with 62 additions and 46 deletions
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108
signal.c
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@ -378,54 +378,12 @@ int sig;
#ifdef LINUX
int sfd;
char sname[32];
char buf[1024];
char buf[2048];
char *s;
int i;
unsigned int signalled, blocked, ignored, caught;
/* This is incredibly costly but it's worth it. */
sprintf(sname, "/proc/%d/stat", tcp->pid);
if ((sfd = open(sname, O_RDONLY)) == -1) {
perror(sname);
return 1;
}
i = read(sfd, buf, 1024);
buf[i] = '\0';
close(sfd);
/*
* Skip the extraneous fields. This loses if the
* command name has any spaces in it. So be it.
*/
for (i = 0, s = buf; i < 30; i++) {
while (*++s != ' ') {
if (!*s)
break;
}
}
if (sscanf(s, "%u%u%u%u",
&signalled, &blocked, &ignored, &caught) != 4) {
fprintf(stderr, "/proc/pid/stat format error\n");
return 1;
}
#ifdef DEBUG
fprintf(stderr, "sigs: %08x %08x %08x %08x\n",
signalled, blocked, ignored, caught);
/* We also need to handle RT signals */
unsigned long long signalled, blocked, ignored, caught;
#endif
if ((ignored & sigmask(sig)) || (caught & sigmask(sig)))
return 1;
#endif /* LINUX */
#ifdef SUNOS4
void (*u_signal)();
if (upeek(tcp->pid, uoff(u_signal[0]) + sig*sizeof(u_signal),
(long *) &u_signal) < 0) {
return 0;
}
if (u_signal != SIG_DFL)
return 1;
#endif /* SUNOS4 */
#ifdef SVR4
/*
* Since procfs doesn't interfere with wait I think it is safe
@ -450,8 +408,66 @@ int sig;
default:
break;
}
return 0;
#endif /* !SVR4 */
#ifdef LINUX
/* This is incredibly costly but it's worth it. */
/* NOTE: LinuxThreads internally uses SIGRTMIN, SIGRTMIN + 1 and
SIGRTMIN + 2, so we can't use the obsolete /proc/%d/stat which
doesn't handle real-time signals). */
sprintf(sname, "/proc/%d/status", tcp->pid);
if ((sfd = open(sname, O_RDONLY)) == -1) {
perror(sname);
return 1;
}
i = read(sfd, buf, sizeof(buf));
buf[i] = '\0';
close(sfd);
/*
* Skip the extraneous fields. We need to skip
* command name has any spaces in it. So be it.
*/
s = strstr(buf, "SigPnd:\t");
if (!s)
{
fprintf(stderr, "/proc/pid/status format error\n");
return 1;
}
while (*s && *s++ != '\t')
;
s += sscanf(s, "%qx", &signalled);
while (*s && *s++ != '\t')
;
s += sscanf(s, "%qx", &blocked);
while (*s && *s++ != '\t')
;
s += sscanf(s, "%qx", &ignored);
while (*s && *s++ != '\t')
;
s += sscanf(s, "%qx", &caught);
#ifdef DEBUG
fprintf(stderr, "sigs: %08x %08x %08x %08x\n",
signalled, blocked, ignored, caught);
#endif
if ((ignored & (1ULL << sig)) || (caught & (1ULL << sig)))
return 1;
#endif /* LINUX */
#ifdef SUNOS4
void (*u_signal)();
if (upeek(tcp->pid, uoff(u_signal[0]) + sig*sizeof(u_signal),
(long *) &u_signal) < 0) {
return 0;
}
if (u_signal != SIG_DFL)
return 1;
#endif /* SUNOS4 */
return 0;
}
#if defined(SUNOS4) || defined(FREEBSD)