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Commit | Line | Data |
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c86edd1d Q |
1 | |
2 | #include "chanserv.h" | |
3 | #include "../core/events.h" | |
4 | #include <pcre.h> | |
5 | #include <sys/poll.h> | |
6 | #include <sys/types.h> | |
7 | #include <sys/stat.h> | |
8 | #include <fcntl.h> | |
9 | #include <unistd.h> | |
10 | #include <string.h> | |
11 | #include <stdio.h> | |
12 | ||
13 | #define CSG_BUFSIZE 512 | |
14 | ||
15 | pcre *csg_curpat; /* Compiled pattern from pcre */ | |
16 | int csg_curfile; /* Which logfile is being searched */ | |
17 | unsigned long csg_curnum; /* What numeric is doing a search */ | |
18 | int csg_matches; /* How many lines have been returned so far */ | |
19 | int csg_maxmatches=0; /* How many matches are allowed */ | |
20 | ||
21 | char csg_readbuf[CSG_BUFSIZE]; /* Buffer */ | |
22 | int csg_bytesleft; /* How much valid data there is in the buffer */ | |
23 | ||
24 | void csg_handleevents(int fd, short revents); | |
25 | int csg_dogrep(void *source, int cargc, char **cargv); | |
26 | ||
27 | void _init() { | |
28 | chanservaddcommand("grep", QCMD_OPER, 1, csg_dogrep, "Searches the logs."); | |
29 | } | |
30 | ||
31 | void _fini() { | |
32 | chanservremovecommand("grep", csg_dogrep); | |
33 | } | |
34 | ||
35 | int csg_dogrep(void *source, int cargc, char **cargv) { | |
36 | nick *sender=source; | |
37 | const char *errptr; | |
38 | int erroffset; | |
39 | int fd; | |
40 | ||
41 | if (cargc<1) { | |
42 | chanservstdmessage(sender, QM_NOTENOUGHPARAMS, "grep"); | |
43 | return CMD_ERROR; | |
44 | } | |
45 | ||
46 | if (csg_maxmatches>0) { | |
47 | chanservsendmessage(sender, "Sorry, grep is currently busy - try later."); | |
48 | return CMD_ERROR; | |
49 | } | |
50 | ||
51 | if (!(csg_curpat=pcre_compile(cargv[0], 0, &errptr, &erroffset, NULL))) { | |
52 | chanservsendmessage(sender, "Error in pattern at character %d: %s",erroffset,errptr); | |
53 | return CMD_ERROR; | |
54 | } | |
55 | ||
56 | if ((fd=open("chanservlog.0",O_RDONLY))<0) { | |
57 | chanservsendmessage(sender, "Unable to open logfile."); | |
58 | free(csg_curpat); | |
59 | return CMD_ERROR; | |
60 | } | |
61 | ||
62 | /* Initialise stuff for the match */ | |
63 | csg_maxmatches=500; | |
64 | csg_matches=0; | |
65 | csg_curnum=sender->numeric; | |
66 | csg_curfile=0; | |
67 | csg_bytesleft=0; | |
68 | ||
69 | registerhandler(fd, POLLIN, csg_handleevents); | |
70 | chanservsendmessage(sender, "Started grep for %s...",cargv[0]); | |
71 | ||
72 | return CMD_OK; | |
73 | } | |
74 | ||
75 | void csg_handleevents(int fd, short revents) { | |
76 | int res; | |
77 | nick *np=getnickbynumeric(csg_curnum); | |
78 | char *chp, *linestart; | |
79 | char filename[50]; | |
80 | off_t pos; | |
81 | ||
82 | /* If the target user has vanished, drop everything */ | |
83 | if (!np) { | |
84 | deregisterhandler(fd, 1); | |
85 | free(csg_curpat); | |
86 | csg_maxmatches=0; | |
87 | return; | |
88 | } | |
89 | ||
90 | retry: | |
91 | res=read(fd, csg_readbuf+csg_bytesleft, CSG_BUFSIZE-csg_bytesleft); | |
92 | ||
93 | if (res<=0) { | |
94 | /* End of file (or error) */ | |
95 | deregisterhandler(fd, 1); | |
96 | sprintf(filename,"chanservlog.%d",++csg_curfile); | |
97 | if ((fd=open(filename,O_RDONLY))>=0) { | |
98 | /* Found the next file */ | |
99 | registerhandler(fd, POLLIN, csg_handleevents); | |
100 | } else { | |
101 | chanservstdmessage(np, QM_ENDOFLIST); | |
102 | free(csg_curpat); | |
103 | csg_maxmatches=0; | |
104 | } | |
105 | ||
106 | return; | |
107 | } | |
108 | ||
109 | linestart=chp=csg_readbuf; | |
110 | csg_bytesleft+=res; | |
111 | ||
112 | while (csg_bytesleft) { | |
113 | csg_bytesleft--; | |
114 | if (*chp=='\r' || *chp=='\n' || *chp=='\0') { | |
115 | if (linestart==chp) { | |
116 | linestart=(++chp); | |
117 | } else { | |
118 | *chp++='\0'; | |
119 | if (!pcre_exec(csg_curpat, NULL, linestart, strlen(linestart), 0, 0, NULL, 0)) { | |
120 | chanservsendmessage(np, "%s", linestart); | |
121 | if (++csg_matches >= csg_maxmatches) { | |
122 | chanservstdmessage(np, QM_ENDOFLIST); | |
123 | free(csg_curpat); | |
124 | deregisterhandler(fd, 1); | |
125 | csg_maxmatches=0; | |
126 | } | |
127 | } | |
128 | linestart=chp; | |
129 | } | |
130 | } else { | |
131 | chp++; | |
132 | } | |
133 | } | |
134 | ||
135 | csg_bytesleft=(chp-linestart); | |
136 | memmove(csg_readbuf, linestart, csg_bytesleft); | |
137 | ||
138 | /* BSD hack */ | |
139 | pos=lseek(fd, 0, SEEK_CUR); | |
140 | if (!pread(fd, csg_readbuf+csg_bytesleft, 1, pos)) { | |
141 | /* EOF */ | |
142 | goto retry; | |
143 | } | |
144 | } |