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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> | |
4ad1cf7a | 12 | #include <unistd.h> |
c86edd1d Q |
13 | |
14 | #define CSG_BUFSIZE 512 | |
15 | ||
16 | pcre *csg_curpat; /* Compiled pattern from pcre */ | |
17 | int csg_curfile; /* Which logfile is being searched */ | |
18 | unsigned long csg_curnum; /* What numeric is doing a search */ | |
19 | int csg_matches; /* How many lines have been returned so far */ | |
20 | int csg_maxmatches=0; /* How many matches are allowed */ | |
21 | ||
22 | char csg_readbuf[CSG_BUFSIZE]; /* Buffer */ | |
23 | int csg_bytesleft; /* How much valid data there is in the buffer */ | |
24 | ||
25 | void csg_handleevents(int fd, short revents); | |
26 | int csg_dogrep(void *source, int cargc, char **cargv); | |
27 | ||
4ad1cf7a CP |
28 | #if !defined(pread) |
29 | extern ssize_t pread(int fd, void *buf, size_t count, off_t offset); | |
30 | #endif | |
31 | ||
c86edd1d Q |
32 | void _init() { |
33 | chanservaddcommand("grep", QCMD_OPER, 1, csg_dogrep, "Searches the logs."); | |
34 | } | |
35 | ||
36 | void _fini() { | |
37 | chanservremovecommand("grep", csg_dogrep); | |
38 | } | |
39 | ||
40 | int csg_dogrep(void *source, int cargc, char **cargv) { | |
41 | nick *sender=source; | |
42 | const char *errptr; | |
43 | int erroffset; | |
44 | int fd; | |
45 | ||
46 | if (cargc<1) { | |
47 | chanservstdmessage(sender, QM_NOTENOUGHPARAMS, "grep"); | |
48 | return CMD_ERROR; | |
49 | } | |
50 | ||
51 | if (csg_maxmatches>0) { | |
52 | chanservsendmessage(sender, "Sorry, grep is currently busy - try later."); | |
53 | return CMD_ERROR; | |
54 | } | |
55 | ||
56 | if (!(csg_curpat=pcre_compile(cargv[0], 0, &errptr, &erroffset, NULL))) { | |
57 | chanservsendmessage(sender, "Error in pattern at character %d: %s",erroffset,errptr); | |
58 | return CMD_ERROR; | |
59 | } | |
60 | ||
61 | if ((fd=open("chanservlog.0",O_RDONLY))<0) { | |
62 | chanservsendmessage(sender, "Unable to open logfile."); | |
63 | free(csg_curpat); | |
64 | return CMD_ERROR; | |
65 | } | |
66 | ||
67 | /* Initialise stuff for the match */ | |
68 | csg_maxmatches=500; | |
69 | csg_matches=0; | |
70 | csg_curnum=sender->numeric; | |
71 | csg_curfile=0; | |
72 | csg_bytesleft=0; | |
73 | ||
74 | registerhandler(fd, POLLIN, csg_handleevents); | |
75 | chanservsendmessage(sender, "Started grep for %s...",cargv[0]); | |
76 | ||
77 | return CMD_OK; | |
78 | } | |
79 | ||
80 | void csg_handleevents(int fd, short revents) { | |
81 | int res; | |
82 | nick *np=getnickbynumeric(csg_curnum); | |
83 | char *chp, *linestart; | |
84 | char filename[50]; | |
85 | off_t pos; | |
86 | ||
87 | /* If the target user has vanished, drop everything */ | |
88 | if (!np) { | |
89 | deregisterhandler(fd, 1); | |
90 | free(csg_curpat); | |
91 | csg_maxmatches=0; | |
92 | return; | |
93 | } | |
94 | ||
95 | retry: | |
96 | res=read(fd, csg_readbuf+csg_bytesleft, CSG_BUFSIZE-csg_bytesleft); | |
97 | ||
98 | if (res<=0) { | |
99 | /* End of file (or error) */ | |
100 | deregisterhandler(fd, 1); | |
101 | sprintf(filename,"chanservlog.%d",++csg_curfile); | |
102 | if ((fd=open(filename,O_RDONLY))>=0) { | |
103 | /* Found the next file */ | |
104 | registerhandler(fd, POLLIN, csg_handleevents); | |
105 | } else { | |
106 | chanservstdmessage(np, QM_ENDOFLIST); | |
107 | free(csg_curpat); | |
108 | csg_maxmatches=0; | |
109 | } | |
110 | ||
111 | return; | |
112 | } | |
113 | ||
114 | linestart=chp=csg_readbuf; | |
115 | csg_bytesleft+=res; | |
116 | ||
117 | while (csg_bytesleft) { | |
118 | csg_bytesleft--; | |
119 | if (*chp=='\r' || *chp=='\n' || *chp=='\0') { | |
120 | if (linestart==chp) { | |
121 | linestart=(++chp); | |
122 | } else { | |
123 | *chp++='\0'; | |
124 | if (!pcre_exec(csg_curpat, NULL, linestart, strlen(linestart), 0, 0, NULL, 0)) { | |
125 | chanservsendmessage(np, "%s", linestart); | |
126 | if (++csg_matches >= csg_maxmatches) { | |
127 | chanservstdmessage(np, QM_ENDOFLIST); | |
128 | free(csg_curpat); | |
129 | deregisterhandler(fd, 1); | |
130 | csg_maxmatches=0; | |
131 | } | |
132 | } | |
133 | linestart=chp; | |
134 | } | |
135 | } else { | |
136 | chp++; | |
137 | } | |
138 | } | |
139 | ||
140 | csg_bytesleft=(chp-linestart); | |
141 | memmove(csg_readbuf, linestart, csg_bytesleft); | |
142 | ||
143 | /* BSD hack */ | |
144 | pos=lseek(fd, 0, SEEK_CUR); | |
145 | if (!pread(fd, csg_readbuf+csg_bytesleft, 1, pos)) { | |
146 | /* EOF */ | |
147 | goto retry; | |
148 | } | |
149 | } |