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authorErik Andersen <andersen@codepoet.org>2000-02-08 19:58:47 +0000
committerErik Andersen <andersen@codepoet.org>2000-02-08 19:58:47 +0000
commite49d5ecbbe51718fa925b6890a735e5937cc2aa2 (patch)
treec90bda10731ad9333ce3b404f993354c9fc104b8 /ps.c
parentc0bf817bbc5c7867fbe8fb76d5c39f8ee802692f (diff)
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Some formatting updates (ran the code through indent)
-Erik
Diffstat (limited to 'ps.c')
-rw-r--r--ps.c206
1 files changed, 106 insertions, 100 deletions
diff --git a/ps.c b/ps.c
index 4496faa31..207cdaa02 100644
--- a/ps.c
+++ b/ps.c
@@ -1,3 +1,4 @@
1/* vi: set sw=4 ts=4: */
1/* 2/*
2 * Mini ps implementation for busybox 3 * Mini ps implementation for busybox
3 * 4 *
@@ -33,123 +34,128 @@
33#endif 34#endif
34 35
35typedef struct proc_s { 36typedef struct proc_s {
36 char 37 char
37 cmd[16]; /* basename of executable file in call to exec(2) */ 38 cmd[16]; /* basename of executable file in call to exec(2) */
38 int 39 int
39 ruid, rgid, /* real only (sorry) */ 40 ruid, rgid, /* real only (sorry) */
40 pid, /* process id */ 41 pid, /* process id */
41 ppid; /* pid of parent process */ 42 ppid; /* pid of parent process */
42 char 43 char
43 state; /* single-char code for process state (S=sleeping) */ 44 state; /* single-char code for process state (S=sleeping) */
44} proc_t; 45} proc_t;
45 46
46 47
47 48
48static int file2str(char *filename, char *ret, int cap) 49static int file2str(char *filename, char *ret, int cap)
49{ 50{
50 int fd, num_read; 51 int fd, num_read;
51 52
52 if ( (fd = open(filename, O_RDONLY, 0)) == -1 ) return -1; 53 if ((fd = open(filename, O_RDONLY, 0)) == -1)
53 if ( (num_read = read(fd, ret, cap - 1)) <= 0 ) return -1; 54 return -1;
54 ret[num_read] = 0; 55 if ((num_read = read(fd, ret, cap - 1)) <= 0)
55 close(fd); 56 return -1;
56 return num_read; 57 ret[num_read] = 0;
58 close(fd);
59 return num_read;
57} 60}
58 61
59 62
60static void parse_proc_status(char* S, proc_t* P) 63static void parse_proc_status(char *S, proc_t * P)
61{ 64{
62 char* tmp; 65 char *tmp;
63 memset(P->cmd, 0, sizeof P->cmd); 66
64 sscanf (S, "Name:\t%15c", P->cmd); 67 memset(P->cmd, 0, sizeof P->cmd);
65 tmp = strchr(P->cmd,'\n'); 68 sscanf(S, "Name:\t%15c", P->cmd);
66 if (tmp) 69 tmp = strchr(P->cmd, '\n');
67 *tmp='\0'; 70 if (tmp)
68 tmp = strstr (S,"State"); 71 *tmp = '\0';
69 sscanf (tmp, "State:\t%c", &P->state); 72 tmp = strstr(S, "State");
70 73 sscanf(tmp, "State:\t%c", &P->state);
71 tmp = strstr (S,"Pid:"); 74
72 if(tmp) sscanf (tmp, 75 tmp = strstr(S, "Pid:");
73 "Pid:\t%d\n" 76 if (tmp)
74 "PPid:\t%d\n", 77 sscanf(tmp, "Pid:\t%d\n" "PPid:\t%d\n", &P->pid, &P->ppid);
75 &P->pid, 78 else
76 &P->ppid 79 fprintf(stderr, "Internal error!\n");
77 ); 80
78 else fprintf(stderr, "Internal error!\n"); 81 /* For busybox, ignoring effective, saved, etc */
79 82 tmp = strstr(S, "Uid:");
80 /* For busybox, ignoring effective, saved, etc */ 83 if (tmp)
81 tmp = strstr (S,"Uid:"); 84 sscanf(tmp, "Uid:\t%d", &P->ruid);
82 if(tmp) sscanf (tmp, 85 else
83 "Uid:\t%d", &P->ruid); 86 fprintf(stderr, "Internal error!\n");
84 else fprintf(stderr, "Internal error!\n"); 87
85 88 tmp = strstr(S, "Gid:");
86 tmp = strstr (S,"Gid:"); 89 if (tmp)
87 if(tmp) sscanf (tmp, 90 sscanf(tmp, "Gid:\t%d", &P->rgid);
88 "Gid:\t%d", &P->rgid); 91 else
89 else fprintf(stderr, "Internal error!\n"); 92 fprintf(stderr, "Internal error!\n");
90 93
91} 94}
92 95
93 96
94extern int ps_main(int argc, char **argv) 97extern int ps_main(int argc, char **argv)
95{ 98{
96 proc_t p; 99 proc_t p;
97 DIR *dir; 100 DIR *dir;
98 FILE *file; 101 FILE *file;
99 struct dirent *entry; 102 struct dirent *entry;
100 char path[32], sbuf[512]; 103 char path[32], sbuf[512];
101 char uidName[10]=""; 104 char uidName[10] = "";
102 char groupName[10]=""; 105 char groupName[10] = "";
103 int i, c; 106 int i, c;
104 107
105 if ( argc>1 && **(argv+1) == '-' ) { 108 if (argc > 1 && **(argv + 1) == '-') {
106 usage ("ps\n\nReport process status\n\nThis version of ps accepts no options.\n"); 109 usage
107 } 110 ("ps\n\nReport process status\n\nThis version of ps accepts no options.\n");
108
109 dir = opendir("/proc");
110 if (!dir) {
111 perror("Can't open /proc");
112 exit(FALSE);
113 }
114
115 fprintf(stdout, "%5s %-8s %-3s %5s %s\n", "PID", "Uid", "Gid", "State", "Command");
116 while ((entry = readdir(dir)) != NULL) {
117 uidName[0]='\0';
118 groupName[0]='\0';
119
120 if (! isdigit(*entry->d_name))
121 continue;
122 sprintf(path, "/proc/%s/status", entry->d_name);
123 if ((file2str(path, sbuf, sizeof sbuf)) != -1 ) {
124 parse_proc_status(sbuf, &p);
125 } 111 }
126 112
127 /* Make some adjustments as needed */ 113 dir = opendir("/proc");
128 my_getpwuid( uidName, p.ruid); 114 if (!dir) {
129 my_getgrgid( groupName, p.rgid); 115 perror("Can't open /proc");
130 if (*uidName == '\0') 116 exit(FALSE);
131 sprintf( uidName, "%d", p.ruid);
132 if (*groupName == '\0')
133 sprintf( groupName, "%d", p.rgid);
134
135 fprintf(stdout, "%5d %-8s %-8s %c ", p.pid, uidName, groupName, p.state);
136 sprintf(path, "/proc/%s/cmdline", entry->d_name);
137 file = fopen(path, "r");
138 if (file == NULL) {
139 perror(path);
140 exit(FALSE);
141 } 117 }
142 i=0; 118
143 while (((c = getc(file)) != EOF) && (i < 53)) { 119 fprintf(stdout, "%5s %-8s %-3s %5s %s\n", "PID", "Uid", "Gid",
144 i++; 120 "State", "Command");
145 if (c == '\0') 121 while ((entry = readdir(dir)) != NULL) {
146 c = ' '; 122 uidName[0] = '\0';
147 putc(c, stdout); 123 groupName[0] = '\0';
124
125 if (!isdigit(*entry->d_name))
126 continue;
127 sprintf(path, "/proc/%s/status", entry->d_name);
128 if ((file2str(path, sbuf, sizeof sbuf)) != -1) {
129 parse_proc_status(sbuf, &p);
130 }
131
132 /* Make some adjustments as needed */
133 my_getpwuid(uidName, p.ruid);
134 my_getgrgid(groupName, p.rgid);
135 if (*uidName == '\0')
136 sprintf(uidName, "%d", p.ruid);
137 if (*groupName == '\0')
138 sprintf(groupName, "%d", p.rgid);
139
140 fprintf(stdout, "%5d %-8s %-8s %c ", p.pid, uidName, groupName,
141 p.state);
142 sprintf(path, "/proc/%s/cmdline", entry->d_name);
143 file = fopen(path, "r");
144 if (file == NULL) {
145 perror(path);
146 exit(FALSE);
147 }
148 i = 0;
149 while (((c = getc(file)) != EOF) && (i < 53)) {
150 i++;
151 if (c == '\0')
152 c = ' ';
153 putc(c, stdout);
154 }
155 if (i == 0)
156 fprintf(stdout, "%s", p.cmd);
157 fprintf(stdout, "\n");
148 } 158 }
149 if (i==0) 159 closedir(dir);
150 fprintf(stdout, "%s", p.cmd); 160 exit(TRUE);
151 fprintf(stdout, "\n");
152 }
153 closedir(dir);
154 exit(TRUE);
155} 161}
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