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Add a new patch to handle interrupting the fgets() call when using FastAGI.

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This version of the patch maintains the original behavior of the code when
not using FastAGI.
(closes issue #10553)
Reported by: juggie
Patches:
      res_agi_fgets-4.patch uploaded by juggie (license 24)
      res_agi_fgets_1.4svn.patch uploaded by juggie (license 24)
	  Slight mods by me
Tested by: juggie, festr


git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.4@82929 65c4cc65-6c06-0410-ace0-fbb531ad65f3
This commit is contained in:
Russell Bryant
2007-09-18 22:42:27 +00:00
parent 8ac8d79a5d
commit 0f23b76a39
2 changed files with 26 additions and 4 deletions
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1
include/asterisk/agi.h
View File

@@ -31,6 +31,7 @@ typedef struct agi_state {
int fd; /* FD for general output */
int audio; /* FD for audio output */
int ctrl; /* FD for input control */
unsigned int fast:1; /* flag for fast agi or not */
} AGI;
typedef struct agi_command {

29
res/res_agi.c
View File

@@ -113,6 +113,7 @@ static int agidebug = 0;
enum agi_result {
AGI_RESULT_SUCCESS,
AGI_RESULT_SUCCESS_FAST,
AGI_RESULT_FAILURE,
AGI_RESULT_HANGUP
};
@@ -232,7 +233,7 @@ static enum agi_result launch_netscript(char *agiurl, char *argv[], int *fds, in
fds[0] = s;
fds[1] = s;
*opid = -1;
return AGI_RESULT_SUCCESS;
return AGI_RESULT_SUCCESS_FAST;
}
static enum agi_result launch_script(char *script, char *argv[], int *fds, int *efd, int *opid)
@@ -1833,6 +1834,7 @@ static enum agi_result run_agi(struct ast_channel *chan, char *request, AGI *agi
enum agi_result returnstatus = AGI_RESULT_SUCCESS;
struct ast_frame *f;
char buf[AGI_BUF_LEN];
char *res = NULL;
FILE *readf;
/* how many times we'll retry if ast_waitfor_nandfs will return without either
channel or file descriptor in case select is interrupted by a system call (EINTR) */
@@ -1867,10 +1869,27 @@ static enum agi_result run_agi(struct ast_channel *chan, char *request, AGI *agi
ast_frfree(f);
}
} else if (outfd > -1) {
size_t len = sizeof(buf);
size_t buflen = 0;
retry = AGI_NANDFS_RETRY;
buf[0] = '\0';
if (!fgets(buf, sizeof(buf), readf)) {
while (buflen < (len - 1)) {
res = fgets(buf + buflen, len, readf);
if (feof(readf))
break;
if (ferror(readf) && ((errno != EINTR) && (errno != EAGAIN)))
break;
if (res != NULL && !agi->fast)
break;
buflen = strlen(buf);
len -= buflen;
if (agidebug)
ast_verbose( "AGI Rx << temp buffer %s - errno %s\n", buf, strerror(errno));
}
if (!buf[0]) {
/* Program terminated */
if (returnstatus)
returnstatus = -1;
@@ -2027,14 +2046,15 @@ static int agi_exec_full(struct ast_channel *chan, void *data, int enhanced, int
}
#endif
res = launch_script(argv[0], argv, fds, enhanced ? &efd : NULL, &pid);
if (res == AGI_RESULT_SUCCESS) {
if (res == AGI_RESULT_SUCCESS || res == AGI_RESULT_SUCCESS_FAST) {
int status = 0;
agi.fd = fds[1];
agi.ctrl = fds[0];
agi.audio = efd;
agi.fast = (res == AGI_RESULT_SUCCESS_FAST) ? 1 : 0;
res = run_agi(chan, argv[0], &agi, pid, &status, dead);
/* If the fork'd process returns non-zero, set AGISTATUS to FAILURE */
if (res == AGI_RESULT_SUCCESS && status)
if ((res == AGI_RESULT_SUCCESS || res == AGI_RESULT_SUCCESS_FAST) && status)
res = AGI_RESULT_FAILURE;
if (fds[1] != fds[0])
close(fds[1]);
@@ -2046,6 +2066,7 @@ static int agi_exec_full(struct ast_channel *chan, void *data, int enhanced, int
switch (res) {
case AGI_RESULT_SUCCESS:
case AGI_RESULT_SUCCESS_FAST:
pbx_builtin_setvar_helper(chan, "AGISTATUS", "SUCCESS");
break;
case AGI_RESULT_FAILURE: