1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
|
#include "sash.h"
#include <fcntl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <dirent.h>
#include <pwd.h>
#include <grp.h>
#include <time.h>
#include <unistd.h>
#if 0
char psbuf[256];
char name[40];
int pid, state;
char statec;
void
do_ps(argc, argv)
int argc;
char **argv;
{
int i;
int h;
int max;
FILE * f;
DIR * d;
struct dirent * de;
int l;
printf(" PID TTY STAT TIME COMMAND\n");
d = opendir("/proc");
if (!d)
return;
while (de = readdir(d)) {
for(i=0;i<strlen(de->d_name);i++)
if (!isdigit(de->d_name[i]))
goto next;
sprintf(psbuf, "/proc/%s/stat", de->d_name);
h = open(psbuf, O_RDONLY);
if (h==-1)
continue;
l = read(h, psbuf, 255);
if (l<=0) {
perror("Unable to read status");
close(h);
continue;
}
psbuf[l] = '\0';
psbuf[255] = '\0';
if (sscanf(psbuf,
"%d %s %c",
&pid, name, &statec)<3)
{
perror("Unable to parse status");
close(h);
continue;
}
state = statec;
close(h);
sprintf(psbuf, "/proc/%s/cmdline", de->d_name);
h = open(psbuf, O_RDONLY);
if (h == -1) {
perror("Unable to open cmdline");
continue;
}
l = read(h, psbuf, 255);
if (l < 0) {
perror("Unable to read cmdline");
close(h);
continue;
}
close(h);
psbuf[255] = psbuf[l] = '\0';
printf("%5d %3s %c --:-- %s\n", pid, "", state, psbuf);
next:
}
closedir(d);
}
#endif
void
do_cat(argc, argv)
int argc;
char **argv;
{
int fd;
char *name;
size_t l;
char buf[256];
while (argc-- > 1) {
if (intflag) {
return;
}
name = *(++argv);
fd = open(name, O_RDONLY);
if (fd < 0) {
perror(name);
return;
}
while ((l = read(fd, buf, sizeof(buf))) > 0) {
fwrite(buf, 1, l, stdout);
}
close(fd);
}
}
|