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Cleanup ps(1) a bit

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This commit is contained in:
Mark 2020-07-24 16:10:31 +03:00
parent 75ab196866
commit 9dfeaa3cbd
1 changed files with 30 additions and 20 deletions
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40
progs/base/bin/ps.c
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@ -17,7 +17,7 @@ int main(int argc, char **argv) {
return -1;
}
printf("PID UID:GID NAME\n");
printf("PID UID:GID NAME PARENT\n");
while ((ent = readdir(dir))) {
if (isdigit(ent->d_name[0])) {
printf("#%-5s ", ent->d_name);
@ -25,36 +25,46 @@ int main(int argc, char **argv) {
// Process UID:GID
snprintf(buf, sizeof(buf), FS_PROC "/%s/ioctx", ent->d_name);
fp = fopen(buf, "r");
if (!fp) {
perror(buf);
fputs("????:????", stdout);
if (!fp || !fgets(buf, sizeof(buf), fp)) {
printf("%-11s", "????:????");
} else {
if (fgets(buf, sizeof(buf), fp)) {
if (buf[0] && (p = strchr(buf, '\n'))) {
*p = 0;
}
printf("%-11s ", buf);
} else {
fputs("????:????", stdout);
}
if (fp) {
fclose(fp);
fp = NULL;
}
// Process name
snprintf(buf, sizeof(buf), FS_PROC "/%s/name", ent->d_name);
fp = fopen(buf, "r");
if (!fp) {
perror(buf);
fputs("???\n", stdout);
if (!fp || !fgets(buf, sizeof(buf), fp)) {
printf("%-12s", "???");
} else {
if (fgets(buf, sizeof(buf), fp)) {
fputs(buf, stdout);
} else {
fputs("???\n", stdout);
if (buf[0] && (p = strchr(buf, '\n'))) {
*p = 0;
}
printf("%-12s", buf);
}
if (fp) {
fclose(fp);
fp = NULL;
}
// Process parent
snprintf(buf, sizeof(buf), FS_PROC "/%s/parent", ent->d_name);
fp = fopen(buf, "r");
if (!fp || !fgets(buf, sizeof(buf), fp)) {
fputs("???\n", stdout);
} else {
fputs(buf, stdout);
}
if (fp) {
fclose(fp);
fp = NULL;
}
}
}