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Major code cleanups. We now use open () and read ().

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This commit is contained in:
Martin Baulig
1998-08-16 18:46:53 +00:00
parent 739ce693dc
commit 59bb8d0ced
8 changed files with 251 additions and 268 deletions
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60
sysdeps/linux/procstate.c
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@@ -26,7 +26,9 @@
#include <sys/stat.h>
static const unsigned long _glibtop_sysdeps_proc_state =
(1 << GLIBTOP_PROC_STATE_CMD) + (1 << GLIBTOP_PROC_STATE_STATE) +
(1 << GLIBTOP_PROC_STATE_CMD) + (1 << GLIBTOP_PROC_STATE_STATE);
static const unsigned long _glibtop_sysdeps_proc_state_uid =
(1 << GLIBTOP_PROC_STATE_UID) + (1 << GLIBTOP_PROC_STATE_GID);
/* Init function. */
@@ -34,7 +36,8 @@ static const unsigned long _glibtop_sysdeps_proc_state =
void
glibtop_init_proc_state_s (glibtop *server)
{
server->sysdeps.proc_state = _glibtop_sysdeps_proc_state;
server->sysdeps.proc_state = _glibtop_sysdeps_proc_state |
_glibtop_sysdeps_proc_state_uid;
}
/* Provides detailed information about a process. */
@@ -42,52 +45,45 @@ glibtop_init_proc_state_s (glibtop *server)
void
glibtop_get_proc_state_s (glibtop *server, glibtop_proc_state *buf, pid_t pid)
{
char input [BUFSIZ], *tmp;
char buffer [BUFSIZ], *p;
struct stat statb;
int nread;
FILE *f;
glibtop_init_s (&server, GLIBTOP_SYSDEPS_PROC_STATE, 0);
memset (buf, 0, sizeof (glibtop_proc_state));
sprintf (input, "/proc/%d/stat", pid);
/* IMPORTANT NOTICE: For security reasons it is extremely important
* that the 'uid' and 'gid' fields have correct
* values; NEVER set their flags values if this
* is not the case !!! */
if (stat (input, &statb)) return;
sprintf (buffer, "/proc/%d/stat", pid);
/* For security reasons we use stat () that is more failsafe than sscanf (). */
if (stat (buffer, &statb))
return;
/* For security reasons we use stat () since it is
* more failsafe than parsing the file. */
buf->uid = statb.st_uid;
buf->gid = statb.st_gid;
f = fopen (input, "r");
if (!f) return;
nread = fread (input, 1, BUFSIZ, f);
if (nread < 0) {
fclose (f);
buf->flags = _glibtop_sysdeps_proc_state_uid;
/* Now we read the remaining fields. */
if (proc_stat_to_buffer (buffer, pid))
return;
}
fclose (f);
input [nread] = 0;
/* This is from guile-utils/gtop/proc/readproc.c */
/* split into "PID (cmd" and "<rest>" */
tmp = strrchr (input, ')');
*tmp = '\0'; /* replace trailing ')' with NUL */
/* parse these two strings separately, skipping the leading "(". */
memset (buf->cmd, 0, sizeof (buf->cmd));
sscanf (input, "%d (%39c", &pid, buf->cmd);
sscanf(tmp + 2, "%c", &buf->state); /* skip space after ')' too */
p = strrchr (buffer, ')'); *p = '\0';
buf->state = p [2];
buf->flags = _glibtop_sysdeps_proc_state;
p = skip_token (buffer); p++; /* pid */
if (*p++ != '(')
glibtop_error_r (server, "Bad data in /proc/%d/stat", pid);
strncpy (buf->cmd, p, sizeof (buf->cmd)-1);
buf->cmd [sizeof (buf->cmd)-1] = 0;
buf->flags |= _glibtop_sysdeps_proc_state;
}