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pmap: fix bogus {no such process} comm field text

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function                                             old     new   delta
read_cmdline                                         246     266     +20
procps_get_maps                                      196     193      -3
packed_usage                                       30413   30404      -9
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(add/remove: 0/0 grow/shrink: 1/2 up/down: 20/-12)              Total: 8 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko
2015-10-24 03:45:57 +02:00
parent 00da72bee0
commit 049b007865
2 changed files with 7 additions and 5 deletions
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8
libbb/procps.c
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@ -588,12 +588,14 @@ void FAST_FUNC read_cmdline(char *buf, int col, unsigned pid, const char *comm)
buf[sz] = ' ';
sz--;
}
if (base[0] == '-') /* "-sh" (login shell)? */
base++;
/* If comm differs from argv0, prepend "{comm} ".
* It allows to see thread names set by prctl(PR_SET_NAME).
*/
if (base[0] == '-') /* "-sh" (login shell)? */
base++;
if (!comm)
return;
comm_len = strlen(comm);
/* Why compare up to comm_len, not COMM_LEN-1?
* Well, some processes rewrite argv, and use _spaces_ there
@ -612,7 +614,7 @@ void FAST_FUNC read_cmdline(char *buf, int col, unsigned pid, const char *comm)
buf[col - 1] = '\0';
}
} else {
snprintf(buf, col, "[%s]", comm);
snprintf(buf, col, "[%s]", comm ? comm : "?");
}
}